-
-
+#ifndef Table_H
+#define Table_H
+#include "common.h"
+#include "Pair.h"
+#include "ThreeTuple.h"
/**
- * IoTTable data structure. Provides client interface.
- * @author Brian Demsky
- * @version 1.0
- */
-
-final public class Table {
-
- /* Constants */
- static final int FREE_SLOTS = 2; // Number of slots that should be kept free // 10
- static final int SKIP_THRESHOLD = 10;
- static final double RESIZE_MULTIPLE = 1.2;
- static final double RESIZE_THRESHOLD = 0.75;
- static final int REJECTED_THRESHOLD = 5;
-
- /* Helper Objects */
- private SlotBuffer buffer = NULL;
- private CloudComm cloud = NULL;
- private Random random = NULL;
- private TableStatus liveTableStatus = NULL;
- private PendingTransaction pendingTransactionBuilder = NULL; // Pending Transaction used in building a Pending Transaction
- private Transaction lastPendingTransactionSpeculatedOn = NULL; // Last transaction that was speculated on from the pending transaction
- private Transaction firstPendingTransaction = NULL; // first transaction in the pending transaction list
-
- /* Variables */
- private int numberOfSlots = 0; // Number of slots stored in buffer
- private int bufferResizeThreshold = 0; // Threshold on the number of live slots before a resize is needed
- private int64_t liveSlotCount = 0; // Number of currently live slots
- private int64_t oldestLiveSlotSequenceNumver = 0; // Smallest sequence number of the slot with a live entry
- private int64_t localMachineId = 0; // Machine ID of this client device
- private int64_t sequenceNumber = 0; // Largest sequence number a client has received
- private int64_t localSequenceNumber = 0;
-
- // private int smallestTableStatusSeen = -1; // Smallest Table Status that was seen in the latest slots sent from the server
- // private int largestTableStatusSeen = -1; // Largest Table Status that was seen in the latest slots sent from the server
- private int64_t localTransactionSequenceNumber = 0; // Local sequence number counter for transactions
- private int64_t lastTransactionSequenceNumberSpeculatedOn = -1; // the last transaction that was speculated on
- private int64_t oldestTransactionSequenceNumberSpeculatedOn = -1; // the oldest transaction that was speculated on
- private int64_t localArbitrationSequenceNumber = 0;
- private bool hadPartialSendToServer = false;
- private bool attemptedToSendToServer = false;
- private int64_t expectedsize;
- private bool didFindTableStatus = false;
- private int64_t currMaxSize = 0;
-
- private Slot lastSlotAttemptedToSend = NULL;
- private bool lastIsNewKey = false;
- private int lastNewSize = 0;
- private Map<Transaction, List<Integer>> lastTransactionPartsSent = NULL;
- private List<Entry> lastPendingSendArbitrationEntriesToDelete = NULL;
- private NewKey lastNewKey = NULL;
-
-
- /* Data Structures */
- private Map<IoTString, KeyValue> committedKeyValueTable = NULL; // Table of committed key value pairs
- private Map<IoTString, KeyValue> speculatedKeyValueTable = NULL; // Table of speculated key value pairs, if there is a speculative value
- private Map<IoTString, KeyValue> pendingTransactionSpeculatedKeyValueTable = NULL; // Table of speculated key value pairs, if there is a speculative value from the pending transactions
- private Map<IoTString, NewKey> liveNewKeyTable = NULL; // Table of live new keys
- private HashMap<Long, Pair<Long, Liveness>> lastMessageTable = NULL; // Last message sent by a client machine id -> (Seq Num, Slot or LastMessage);
- private HashMap<Long, HashSet<RejectedMessage>> rejectedMessageWatchListTable = NULL; // Table of machine Ids and the set of rejected messages they have not seen yet
- private Map<IoTString, Long> arbitratorTable = NULL; // Table of keys and their arbitrators
- private Map<Pair<Long, Long>, Abort> liveAbortTable = NULL; // Table live abort messages
- private Map<Long, Map<Pair<Long, Integer>, TransactionPart>> newTransactionParts = NULL; // transaction parts that are seen in this latest round of slots from the server
- private Map<Long, Map<Pair<Long, Integer>, CommitPart>> newCommitParts = NULL; // commit parts that are seen in this latest round of slots from the server
- private Map<Long, Long> lastArbitratedTransactionNumberByArbitratorTable = NULL; // Last transaction sequence number that an arbitrator arbitrated on
- private Map<Long, Transaction> liveTransactionBySequenceNumberTable = NULL; // live transaction grouped by the sequence number
- private Map<Pair<Long, Long>, Transaction> liveTransactionByTransactionIdTable = NULL; // live transaction grouped by the transaction ID
- private Map<Long, Map<Long, Commit>> liveCommitsTable = NULL;
- private Map<IoTString, Commit> liveCommitsByKeyTable = NULL;
- private Map<Long, Long> lastCommitSeenSequenceNumberByArbitratorTable = NULL;
- private Vector<Long> rejectedSlotList = NULL; // List of rejected slots that have yet to be sent to the server
- private List<Transaction> pendingTransactionQueue = NULL;
- private List<ArbitrationRound> pendingSendArbitrationRounds = NULL;
- private List<Entry> pendingSendArbitrationEntriesToDelete = NULL;
- private Map<Transaction, List<Integer>> transactionPartsSent = NULL;
- private Map<Long, TransactionStatus> outstandingTransactionStatus = NULL;
- private Map<Long, Abort> liveAbortsGeneratedByLocal = NULL;
- private Set<Pair<Long, Long>> offlineTransactionsCommittedAndAtServer = NULL;
- private Map<Long, Pair<String, Integer>> localCommunicationTable = NULL;
- private Map<Long, Long> lastTransactionSeenFromMachineFromServer = NULL;
- private Map<Long, Long> lastArbitrationDataLocalSequenceNumberSeenFromArbitrator = NULL;
-
-
- public Table(String baseurl, String password, int64_t _localMachineId, int listeningPort) {
- localMachineId = _localMachineId;
- cloud = new CloudComm(this, baseurl, password, listeningPort);
-
- init();
- }
-
- public Table(CloudComm _cloud, int64_t _localMachineId) {
- localMachineId = _localMachineId;
- cloud = _cloud;
-
- init();
- }
-
- /**
- * Init all the stuff needed for for table usage
- */
- private void init() {
-
- // Init helper objects
- random = new Random();
- buffer = new SlotBuffer();
-
- // Set Variables
- oldestLiveSlotSequenceNumver = 1;
-
- // init data structs
- committedKeyValueTable = new HashMap<IoTString, KeyValue>();
- speculatedKeyValueTable = new HashMap<IoTString, KeyValue>();
- pendingTransactionSpeculatedKeyValueTable = new HashMap<IoTString, KeyValue>();
- liveNewKeyTable = new HashMap<IoTString, NewKey>();
- lastMessageTable = new HashMap<Long, Pair<Long, Liveness>>();
- rejectedMessageWatchListTable = new HashMap<Long, HashSet<RejectedMessage>>();
- arbitratorTable = new HashMap<IoTString, Long>();
- liveAbortTable = new HashMap<Pair<Long, Long>, Abort>();
- newTransactionParts = new HashMap<Long, Map<Pair<Long, Integer>, TransactionPart>>();
- newCommitParts = new HashMap<Long, Map<Pair<Long, Integer>, CommitPart>>();
- lastArbitratedTransactionNumberByArbitratorTable = new HashMap<Long, Long>();
- liveTransactionBySequenceNumberTable = new HashMap<Long, Transaction>();
- liveTransactionByTransactionIdTable = new HashMap<Pair<Long, Long>, Transaction>();
- liveCommitsTable = new HashMap<Long, Map<Long, Commit>>();
- liveCommitsByKeyTable = new HashMap<IoTString, Commit>();
- lastCommitSeenSequenceNumberByArbitratorTable = new HashMap<Long, Long>();
- rejectedSlotList = new Vector<Long>();
- pendingTransactionQueue = new ArrayList<Transaction>();
- pendingSendArbitrationEntriesToDelete = new ArrayList<Entry>();
- transactionPartsSent = new HashMap<Transaction, List<Integer>>();
- outstandingTransactionStatus = new HashMap<Long, TransactionStatus>();
- liveAbortsGeneratedByLocal = new HashMap<Long, Abort>();
- offlineTransactionsCommittedAndAtServer = new HashSet<Pair<Long, Long>>();
- localCommunicationTable = new HashMap<Long, Pair<String, Integer>>();
- lastTransactionSeenFromMachineFromServer = new HashMap<Long, Long>();
- pendingSendArbitrationRounds = new ArrayList<ArbitrationRound>();
- lastArbitrationDataLocalSequenceNumberSeenFromArbitrator = new HashMap<Long, Long>();
-
-
- // Other init stuff
- numberOfSlots = buffer.capacity();
- setResizeThreshold();
- }
-
- // TODO: delete method
- public synchronized void printSlots() {
- int64_t o = buffer.getOldestSeqNum();
- int64_t n = buffer.getNewestSeqNum();
-
- int[] types = new int[10];
-
- int num = 0;
-
- int livec = 0;
- int deadc = 0;
-
- int casdasd = 0;
-
- int liveslo = 0;
-
- for (int64_t i = o; i < (n + 1); i++) {
- Slot s = buffer.getSlot(i);
-
-
- if (s.isLive()) {
- liveslo++;
- }
-
- Vector<Entry> entries = s.getEntries();
-
- for (Entry e : entries) {
- if (e.isLive()) {
- int type = e.getType();
-
-
- if (type == 6) {
- RejectedMessage rej = (RejectedMessage)e;
- casdasd++;
-
- System.out.println(rej.getMachineID());
- }
-
-
- types[type] = types[type] + 1;
- num++;
- livec++;
- } else {
- deadc++;
- }
- }
- }
-
- for (int i = 0; i < 10; i++) {
- System.out.println(i + " " + types[i]);
- }
- System.out.println("Live count: " + livec);
- System.out.println("Live Slot count: " + liveslo);
-
- System.out.println("Dead count: " + deadc);
- System.out.println("Old: " + o);
- System.out.println("New: " + n);
- System.out.println("Size: " + buffer.size());
- // System.out.println("Commits: " + liveCommitsTable.size());
- System.out.println("pendingTrans: " + pendingTransactionQueue.size());
- System.out.println("Trans Status Out: " + outstandingTransactionStatus.size());
-
- for (Long k : lastArbitratedTransactionNumberByArbitratorTable.keySet()) {
- System.out.println(k + ": " + lastArbitratedTransactionNumberByArbitratorTable.get(k));
- }
-
-
- for (Long a : liveCommitsTable.keySet()) {
- for (Long b : liveCommitsTable.get(a).keySet()) {
- for (KeyValue kv : liveCommitsTable.get(a).get(b).getKeyValueUpdateSet()) {
- System.out.print(kv + " ");
- }
- System.out.print("|| ");
- }
- System.out.println();
- }
-
- }
-
- /**
- * Initialize the table by inserting a table status as the first entry into the table status
- * also initialize the crypto stuff.
- */
- public synchronized void initTable() throws ServerException {
- cloud.initSecurity();
-
- // Create the first insertion into the block chain which is the table status
- Slot s = new Slot(this, 1, localMachineId, localSequenceNumber);
- localSequenceNumber++;
- TableStatus status = new TableStatus(s, numberOfSlots);
- s.addEntry(status);
- Slot[] array = cloud.putSlot(s, numberOfSlots);
-
- if (array == NULL) {
- array = new Slot[] {s};
- // update local block chain
- validateAndUpdate(array, true);
- } else if (array.length == 1) {
- // in case we did push the slot BUT we failed to init it
- validateAndUpdate(array, true);
- } else {
- throw new Error("Error on initialization");
- }
- }
-
- /**
- * Rebuild the table from scratch by pulling the latest block chain from the server.
- */
- public synchronized void rebuild() throws ServerException {
- // Just pull the latest slots from the server
- Slot[] newslots = cloud.getSlots(sequenceNumber + 1);
- validateAndUpdate(newslots, true);
- sendToServer(NULL);
- updateLiveTransactionsAndStatus();
-
- }
-
- // public String toString() {
- // String retString = " Committed Table: \n";
- // retString += "---------------------------\n";
- // retString += commitedTable.toString();
-
- // retString += "\n\n";
-
- // retString += " Speculative Table: \n";
- // retString += "---------------------------\n";
- // retString += speculativeTable.toString();
-
- // return retString;
- // }
-
- public synchronized void addLocalCommunication(int64_t arbitrator, String hostName, int portNumber) {
- localCommunicationTable.put(arbitrator, new Pair<String, Integer>(hostName, portNumber));
- }
-
- public synchronized Long getArbitrator(IoTString key) {
- return arbitratorTable.get(key);
- }
-
- public synchronized void close() {
- cloud.close();
- }
-
- public synchronized IoTString getCommitted(IoTString key) {
- KeyValue kv = committedKeyValueTable.get(key);
-
- if (kv != NULL) {
- return kv.getValue();
- } else {
- return NULL;
- }
- }
-
- public synchronized IoTString getSpeculative(IoTString key) {
- KeyValue kv = pendingTransactionSpeculatedKeyValueTable.get(key);
-
- if (kv == NULL) {
- kv = speculatedKeyValueTable.get(key);
- }
-
- if (kv == NULL) {
- kv = committedKeyValueTable.get(key);
- }
-
- if (kv != NULL) {
- return kv.getValue();
- } else {
- return NULL;
- }
- }
-
- public synchronized IoTString getCommittedAtomic(IoTString key) {
- KeyValue kv = committedKeyValueTable.get(key);
-
- if (arbitratorTable.get(key) == NULL) {
- throw new Error("Key not Found.");
- }
-
- // Make sure new key value pair matches the current arbitrator
- if (!pendingTransactionBuilder.checkArbitrator(arbitratorTable.get(key))) {
- // TODO: Maybe not throw en error
- throw new Error("Not all Key Values Match Arbitrator.");
- }
-
- if (kv != NULL) {
- pendingTransactionBuilder.addKVGuard(new KeyValue(key, kv.getValue()));
- return kv.getValue();
- } else {
- pendingTransactionBuilder.addKVGuard(new KeyValue(key, NULL));
- return NULL;
- }
- }
-
- public synchronized IoTString getSpeculativeAtomic(IoTString key) {
- if (arbitratorTable.get(key) == NULL) {
- throw new Error("Key not Found.");
- }
-
- // Make sure new key value pair matches the current arbitrator
- if (!pendingTransactionBuilder.checkArbitrator(arbitratorTable.get(key))) {
- // TODO: Maybe not throw en error
- throw new Error("Not all Key Values Match Arbitrator.");
- }
-
- KeyValue kv = pendingTransactionSpeculatedKeyValueTable.get(key);
-
- if (kv == NULL) {
- kv = speculatedKeyValueTable.get(key);
- }
-
- if (kv == NULL) {
- kv = committedKeyValueTable.get(key);
- }
-
- if (kv != NULL) {
- pendingTransactionBuilder.addKVGuard(new KeyValue(key, kv.getValue()));
- return kv.getValue();
- } else {
- pendingTransactionBuilder.addKVGuard(new KeyValue(key, NULL));
- return NULL;
- }
- }
-
- public synchronized bool update() {
- try {
- Slot[] newSlots = cloud.getSlots(sequenceNumber + 1);
- validateAndUpdate(newSlots, false);
- sendToServer(NULL);
-
-
- updateLiveTransactionsAndStatus();
-
- return true;
- } catch (Exception e) {
- // e.printStackTrace();
-
- for (Long m : localCommunicationTable.keySet()) {
- updateFromLocal(m);
- }
- }
-
- return false;
- }
-
- public synchronized bool createNewKey(IoTString keyName, int64_t machineId) throws ServerException {
- while (true) {
- if (arbitratorTable.get(keyName) != NULL) {
- // There is already an arbitrator
- return false;
- }
-
- NewKey newKey = new NewKey(NULL, keyName, machineId);
-
- if (sendToServer(newKey)) {
- // If successfully inserted
- return true;
- }
- }
- }
-
- public synchronized void startTransaction() {
- // Create a new transaction, invalidates any old pending transactions.
- pendingTransactionBuilder = new PendingTransaction(localMachineId);
- }
-
- public synchronized void addKV(IoTString key, IoTString value) {
-
- // Make sure it is a valid key
- if (arbitratorTable.get(key) == NULL) {
- throw new Error("Key not Found.");
- }
-
- // Make sure new key value pair matches the current arbitrator
- if (!pendingTransactionBuilder.checkArbitrator(arbitratorTable.get(key))) {
- // TODO: Maybe not throw en error
- throw new Error("Not all Key Values Match Arbitrator.");
- }
-
- // Add the key value to this transaction
- KeyValue kv = new KeyValue(key, value);
- pendingTransactionBuilder.addKV(kv);
- }
-
- public synchronized TransactionStatus commitTransaction() {
-
- if (pendingTransactionBuilder.getKVUpdates().size() == 0) {
- // transaction with no updates will have no effect on the system
- return new TransactionStatus(TransactionStatus.StatusNoEffect, -1);
- }
-
- // Set the local transaction sequence number and increment
- pendingTransactionBuilder.setClientLocalSequenceNumber(localTransactionSequenceNumber);
- localTransactionSequenceNumber++;
-
- // Create the transaction status
- TransactionStatus transactionStatus = new TransactionStatus(TransactionStatus.StatusPending, pendingTransactionBuilder.getArbitrator());
-
- // Create the new transaction
- Transaction newTransaction = pendingTransactionBuilder.createTransaction();
- newTransaction.setTransactionStatus(transactionStatus);
-
- if (pendingTransactionBuilder.getArbitrator() != localMachineId) {
- // Add it to the queue and invalidate the builder for safety
- pendingTransactionQueue.add(newTransaction);
- } else {
- arbitrateOnLocalTransaction(newTransaction);
- updateLiveStateFromLocal();
- }
-
- pendingTransactionBuilder = new PendingTransaction(localMachineId);
-
- try {
- sendToServer(NULL);
- } catch (ServerException e) {
-
- Set<Long> arbitratorTriedAndFailed = new HashSet<Long>();
- for (Iterator<Transaction> iter = pendingTransactionQueue.iterator(); iter.hasNext(); ) {
- Transaction transaction = iter.next();
-
- if (arbitratorTriedAndFailed.contains(transaction.getArbitrator())) {
- // Already contacted this client so ignore all attempts to contact this client
- // to preserve ordering for arbitrator
- continue;
- }
-
- Pair<Boolean, Boolean> sendReturn = sendTransactionToLocal(transaction);
-
- if (sendReturn.getFirst()) {
- // Failed to contact over local
- arbitratorTriedAndFailed.add(transaction.getArbitrator());
- } else {
- // Successful contact or should not contact
-
- if (sendReturn.getSecond()) {
- // did arbitrate
- iter.remove();
- }
- }
- }
- }
-
- updateLiveStateFromLocal();
-
- return transactionStatus;
- }
-
- /**
- * Get the machine ID for this client
- */
- public int64_t getMachineId() {
- return localMachineId;
- }
-
- /**
- * Decrement the number of live slots that we currently have
- */
- public void decrementLiveCount() {
- liveSlotCount--;
- }
-
- /**
- * Recalculate the new resize threshold
- */
- private void setResizeThreshold() {
- int resizeLower = (int) (RESIZE_THRESHOLD * numberOfSlots);
- bufferResizeThreshold = resizeLower - 1 + random.nextInt(numberOfSlots - resizeLower);
- }
-
- public int64_t getLocalSequenceNumber() {
- return localSequenceNumber;
- }
-
-
- bool lastInsertedNewKey = false;
-
- private bool sendToServer(NewKey newKey) throws ServerException {
-
- bool fromRetry = false;
-
- try {
- if (hadPartialSendToServer) {
- Slot[] newSlots = cloud.getSlots(sequenceNumber + 1);
- if (newSlots.length == 0) {
- fromRetry = true;
- ThreeTuple<Boolean, Boolean, Slot[]> sendSlotsReturn = sendSlotsToServer(lastSlotAttemptedToSend, lastNewSize, lastIsNewKey);
-
- if (sendSlotsReturn.getFirst()) {
- if (newKey != NULL) {
- if (lastInsertedNewKey && (lastNewKey.getKey() == newKey.getKey()) && (lastNewKey.getMachineID() == newKey.getMachineID())) {
- newKey = NULL;
- }
- }
-
- for (Transaction transaction : lastTransactionPartsSent.keySet()) {
- transaction.resetServerFailure();
-
- // Update which transactions parts still need to be sent
- transaction.removeSentParts(lastTransactionPartsSent.get(transaction));
-
- // Add the transaction status to the outstanding list
- outstandingTransactionStatus.put(transaction.getSequenceNumber(), transaction.getTransactionStatus());
-
- // Update the transaction status
- transaction.getTransactionStatus().setStatus(TransactionStatus.StatusSentPartial);
-
- // Check if all the transaction parts were successfully sent and if so then remove it from pending
- if (transaction.didSendAllParts()) {
- transaction.getTransactionStatus().setStatus(TransactionStatus.StatusSentFully);
- pendingTransactionQueue.remove(transaction);
- }
- }
- } else {
-
- newSlots = sendSlotsReturn.getThird();
-
- bool isInserted = false;
- for (Slot s : newSlots) {
- if ((s.getSequenceNumber() == lastSlotAttemptedToSend.getSequenceNumber()) && (s.getMachineID() == localMachineId)) {
- isInserted = true;
- break;
- }
- }
-
- for (Slot s : newSlots) {
- if (isInserted) {
- break;
- }
-
- // Process each entry in the slot
- for (Entry entry : s.getEntries()) {
-
- if (entry.getType() == Entry.TypeLastMessage) {
- LastMessage lastMessage = (LastMessage)entry;
- if ((lastMessage.getMachineID() == localMachineId) && (lastMessage.getSequenceNumber() == lastSlotAttemptedToSend.getSequenceNumber())) {
- isInserted = true;
- break;
- }
- }
- }
- }
-
- if (isInserted) {
- if (newKey != NULL) {
- if (lastInsertedNewKey && (lastNewKey.getKey() == newKey.getKey()) && (lastNewKey.getMachineID() == newKey.getMachineID())) {
- newKey = NULL;
- }
- }
-
- for (Transaction transaction : lastTransactionPartsSent.keySet()) {
- transaction.resetServerFailure();
-
- // Update which transactions parts still need to be sent
- transaction.removeSentParts(lastTransactionPartsSent.get(transaction));
-
- // Add the transaction status to the outstanding list
- outstandingTransactionStatus.put(transaction.getSequenceNumber(), transaction.getTransactionStatus());
-
- // Update the transaction status
- transaction.getTransactionStatus().setStatus(TransactionStatus.StatusSentPartial);
-
- // Check if all the transaction parts were successfully sent and if so then remove it from pending
- if (transaction.didSendAllParts()) {
- transaction.getTransactionStatus().setStatus(TransactionStatus.StatusSentFully);
- pendingTransactionQueue.remove(transaction);
- } else {
- transaction.resetServerFailure();
- // Set the transaction sequence number back to nothing
- if (!transaction.didSendAPartToServer()) {
- transaction.setSequenceNumber(-1);
- }
- }
- }
- }
- }
-
- for (Transaction transaction : lastTransactionPartsSent.keySet()) {
- transaction.resetServerFailure();
- // Set the transaction sequence number back to nothing
- if (!transaction.didSendAPartToServer()) {
- transaction.setSequenceNumber(-1);
- }
- }
-
- if (sendSlotsReturn.getThird().length != 0) {
- // insert into the local block chain
- validateAndUpdate(sendSlotsReturn.getThird(), true);
- }
- // continue;
- } else {
- bool isInserted = false;
- for (Slot s : newSlots) {
- if ((s.getSequenceNumber() == lastSlotAttemptedToSend.getSequenceNumber()) && (s.getMachineID() == localMachineId)) {
- isInserted = true;
- break;
- }
- }
-
- for (Slot s : newSlots) {
- if (isInserted) {
- break;
- }
-
- // Process each entry in the slot
- for (Entry entry : s.getEntries()) {
-
- if (entry.getType() == Entry.TypeLastMessage) {
- LastMessage lastMessage = (LastMessage)entry;
- if ((lastMessage.getMachineID() == localMachineId) && (lastMessage.getSequenceNumber() == lastSlotAttemptedToSend.getSequenceNumber())) {
- isInserted = true;
- break;
- }
- }
- }
- }
-
- if (isInserted) {
- if (newKey != NULL) {
- if (lastInsertedNewKey && (lastNewKey.getKey() == newKey.getKey()) && (lastNewKey.getMachineID() == newKey.getMachineID())) {
- newKey = NULL;
- }
- }
-
- for (Transaction transaction : lastTransactionPartsSent.keySet()) {
- transaction.resetServerFailure();
-
- // Update which transactions parts still need to be sent
- transaction.removeSentParts(lastTransactionPartsSent.get(transaction));
-
- // Add the transaction status to the outstanding list
- outstandingTransactionStatus.put(transaction.getSequenceNumber(), transaction.getTransactionStatus());
-
- // Update the transaction status
- transaction.getTransactionStatus().setStatus(TransactionStatus.StatusSentPartial);
-
- // Check if all the transaction parts were successfully sent and if so then remove it from pending
- if (transaction.didSendAllParts()) {
- transaction.getTransactionStatus().setStatus(TransactionStatus.StatusSentFully);
- pendingTransactionQueue.remove(transaction);
- } else {
- transaction.resetServerFailure();
- // Set the transaction sequence number back to nothing
- if (!transaction.didSendAPartToServer()) {
- transaction.setSequenceNumber(-1);
- }
- }
- }
- } else {
- for (Transaction transaction : lastTransactionPartsSent.keySet()) {
- transaction.resetServerFailure();
- // Set the transaction sequence number back to nothing
- if (!transaction.didSendAPartToServer()) {
- transaction.setSequenceNumber(-1);
- }
- }
- }
-
- // insert into the local block chain
- validateAndUpdate(newSlots, true);
- }
- }
- } catch (ServerException e) {
- throw e;
- }
-
-
-
- try {
- // While we have stuff that needs inserting into the block chain
- while ((pendingTransactionQueue.size() > 0) || (pendingSendArbitrationRounds.size() > 0) || (newKey != NULL)) {
-
- fromRetry = false;
-
- if (hadPartialSendToServer) {
- throw new Error("Should Be error free");
- }
-
-
-
- // If there is a new key with same name then end
- if ((newKey != NULL) && (arbitratorTable.get(newKey.getKey()) != NULL)) {
- return false;
- }
-
- // Create the slot
- Slot slot = new Slot(this, sequenceNumber + 1, localMachineId, buffer.getSlot(sequenceNumber).getHMAC(), localSequenceNumber);
- localSequenceNumber++;
-
- // Try to fill the slot with data
- ThreeTuple<Boolean, Integer, Boolean> fillSlotsReturn = fillSlot(slot, false, newKey);
- bool needsResize = fillSlotsReturn.getFirst();
- int newSize = fillSlotsReturn.getSecond();
- Boolean insertedNewKey = fillSlotsReturn.getThird();
-
- if (needsResize) {
- // Reset which transaction to send
- for (Transaction transaction : transactionPartsSent.keySet()) {
- transaction.resetNextPartToSend();
-
- // Set the transaction sequence number back to nothing
- if (!transaction.didSendAPartToServer() && !transaction.getServerFailure()) {
- transaction.setSequenceNumber(-1);
- }
- }
-
- // Clear the sent data since we are trying again
- pendingSendArbitrationEntriesToDelete.clear();
- transactionPartsSent.clear();
-
- // We needed a resize so try again
- fillSlot(slot, true, newKey);
- }
-
- lastSlotAttemptedToSend = slot;
- lastIsNewKey = (newKey != NULL);
- lastInsertedNewKey = insertedNewKey;
- lastNewSize = newSize;
- lastNewKey = newKey;
- lastTransactionPartsSent = new HashMap<Transaction, List<Integer>>(transactionPartsSent);
- lastPendingSendArbitrationEntriesToDelete = new ArrayList<Entry>(pendingSendArbitrationEntriesToDelete);
-
-
- ThreeTuple<Boolean, Boolean, Slot[]> sendSlotsReturn = sendSlotsToServer(slot, newSize, newKey != NULL);
-
- if (sendSlotsReturn.getFirst()) {
-
- // Did insert into the block chain
-
- if (insertedNewKey) {
- // This slot was what was inserted not a previous slot
-
- // New Key was successfully inserted into the block chain so dont want to insert it again
- newKey = NULL;
- }
-
- // Remove the aborts and commit parts that were sent from the pending to send queue
- for (Iterator<ArbitrationRound> iter = pendingSendArbitrationRounds.iterator(); iter.hasNext(); ) {
- ArbitrationRound round = iter.next();
- round.removeParts(pendingSendArbitrationEntriesToDelete);
-
- if (round.isDoneSending()) {
- // Sent all the parts
- iter.remove();
- }
- }
-
- for (Transaction transaction : transactionPartsSent.keySet()) {
- transaction.resetServerFailure();
-
- // Update which transactions parts still need to be sent
- transaction.removeSentParts(transactionPartsSent.get(transaction));
-
- // Add the transaction status to the outstanding list
- outstandingTransactionStatus.put(transaction.getSequenceNumber(), transaction.getTransactionStatus());
-
- // Update the transaction status
- transaction.getTransactionStatus().setStatus(TransactionStatus.StatusSentPartial);
-
- // Check if all the transaction parts were successfully sent and if so then remove it from pending
- if (transaction.didSendAllParts()) {
- transaction.getTransactionStatus().setStatus(TransactionStatus.StatusSentFully);
- pendingTransactionQueue.remove(transaction);
- }
- }
- } else {
-
- // if (!sendSlotsReturn.getSecond()) {
- // for (Transaction transaction : lastTransactionPartsSent.keySet()) {
- // transaction.resetServerFailure();
- // }
- // } else {
- // for (Transaction transaction : lastTransactionPartsSent.keySet()) {
- // transaction.resetServerFailure();
-
- // // Update which transactions parts still need to be sent
- // transaction.removeSentParts(transactionPartsSent.get(transaction));
-
- // // Add the transaction status to the outstanding list
- // outstandingTransactionStatus.put(transaction.getSequenceNumber(), transaction.getTransactionStatus());
-
- // // Update the transaction status
- // transaction.getTransactionStatus().setStatus(TransactionStatus.StatusSentPartial);
-
- // // Check if all the transaction parts were successfully sent and if so then remove it from pending
- // if (transaction.didSendAllParts()) {
- // transaction.getTransactionStatus().setStatus(TransactionStatus.StatusSentFully);
- // pendingTransactionQueue.remove(transaction);
-
- // for (KeyValue kv : transaction.getKeyValueUpdateSet()) {
- // System.out.println("Sent: " + kv + " from: " + localMachineId + " Slot:" + lastSlotAttemptedToSend.getSequenceNumber() + " Claimed:" + transaction.getSequenceNumber());
- // }
- // }
- // }
- // }
-
- // Reset which transaction to send
- for (Transaction transaction : transactionPartsSent.keySet()) {
- transaction.resetNextPartToSend();
- // transaction.resetNextPartToSend();
-
- // Set the transaction sequence number back to nothing
- if (!transaction.didSendAPartToServer() && !transaction.getServerFailure()) {
- transaction.setSequenceNumber(-1);
- }
- }
- }
-
- // Clear the sent data in preparation for next send
- pendingSendArbitrationEntriesToDelete.clear();
- transactionPartsSent.clear();
-
- if (sendSlotsReturn.getThird().length != 0) {
- // insert into the local block chain
- validateAndUpdate(sendSlotsReturn.getThird(), true);
- }
- }
-
- } catch (ServerException e) {
-
- if (e.getType() != ServerException.TypeInputTimeout) {
- // e.printStackTrace();
-
- // Nothing was able to be sent to the server so just clear these data structures
- for (Transaction transaction : transactionPartsSent.keySet()) {
- transaction.resetNextPartToSend();
-
- // Set the transaction sequence number back to nothing
- if (!transaction.didSendAPartToServer() && !transaction.getServerFailure()) {
- transaction.setSequenceNumber(-1);
- }
- }
- } else {
- // There was a partial send to the server
- hadPartialSendToServer = true;
-
-
- // if (!fromRetry) {
- // lastTransactionPartsSent = new HashMap<Transaction, List<Integer>>(transactionPartsSent);
- // lastPendingSendArbitrationEntriesToDelete = new ArrayList<Entry>(pendingSendArbitrationEntriesToDelete);
- // }
-
- // Nothing was able to be sent to the server so just clear these data structures
- for (Transaction transaction : transactionPartsSent.keySet()) {
- transaction.resetNextPartToSend();
- transaction.setServerFailure();
- }
- }
-
- pendingSendArbitrationEntriesToDelete.clear();
- transactionPartsSent.clear();
-
- throw e;
- }
-
- return newKey == NULL;
- }
-
- private synchronized bool updateFromLocal(int64_t machineId) {
- Pair<String, Integer> localCommunicationInformation = localCommunicationTable.get(machineId);
- if (localCommunicationInformation == NULL) {
- // Cant talk to that device locally so do nothing
- return false;
- }
-
- // Get the size of the send data
- int sendDataSize = sizeof(int32_t) + sizeof(int64_t);
-
- Long lastArbitrationDataLocalSequenceNumber = (int64_t) - 1;
- if (lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.get(machineId) != NULL) {
- lastArbitrationDataLocalSequenceNumber = lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.get(machineId);
- }
-
- char[] sendData = new char[sendDataSize];
- ByteBuffer bbEncode = ByteBuffer.wrap(sendData);
-
- // Encode the data
- bbEncode.putLong(lastArbitrationDataLocalSequenceNumber);
- bbEncode.putInt(0);
-
- // Send by local
- char[] returnData = cloud.sendLocalData(sendData, localSequenceNumber, localCommunicationInformation.getFirst(), localCommunicationInformation.getSecond());
- localSequenceNumber++;
-
- if (returnData == NULL) {
- // Could not contact server
- return false;
- }
-
- // Decode the data
- ByteBuffer bbDecode = ByteBuffer.wrap(returnData);
- int numberOfEntries = bbDecode.getInt();
-
- for (int i = 0; i < numberOfEntries; i++) {
- char type = bbDecode.get();
- if (type == Entry.TypeAbort) {
- Abort abort = (Abort)Abort.decode(NULL, bbDecode);
- processEntry(abort);
- } else if (type == Entry.TypeCommitPart) {
- CommitPart commitPart = (CommitPart)CommitPart.decode(NULL, bbDecode);
- processEntry(commitPart);
- }
- }
-
- updateLiveStateFromLocal();
-
- return true;
- }
-
- private Pair<Boolean, Boolean> sendTransactionToLocal(Transaction transaction) {
-
- // Get the devices local communications
- Pair<String, Integer> localCommunicationInformation = localCommunicationTable.get(transaction.getArbitrator());
-
- if (localCommunicationInformation == NULL) {
- // Cant talk to that device locally so do nothing
- return new Pair<Boolean, Boolean>(true, false);
- }
-
- // Get the size of the send data
- int sendDataSize = sizeof(int32_t) + sizeof(int64_t);
- for (TransactionPart part : transaction.getParts().values()) {
- sendDataSize += part.getSize();
- }
-
- Long lastArbitrationDataLocalSequenceNumber = (int64_t) - 1;
- if (lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.get(transaction.getArbitrator()) != NULL) {
- lastArbitrationDataLocalSequenceNumber = lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.get(transaction.getArbitrator());
- }
-
- // Make the send data size
- char[] sendData = new char[sendDataSize];
- ByteBuffer bbEncode = ByteBuffer.wrap(sendData);
-
- // Encode the data
- bbEncode.putLong(lastArbitrationDataLocalSequenceNumber);
- bbEncode.putInt(transaction.getParts().size());
- for (TransactionPart part : transaction.getParts().values()) {
- part.encode(bbEncode);
- }
-
-
- // Send by local
- char[] returnData = cloud.sendLocalData(sendData, localSequenceNumber, localCommunicationInformation.getFirst(), localCommunicationInformation.getSecond());
- localSequenceNumber++;
-
- if (returnData == NULL) {
- // Could not contact server
- return new Pair<Boolean, Boolean>(true, false);
- }
-
- // Decode the data
- ByteBuffer bbDecode = ByteBuffer.wrap(returnData);
- bool didCommit = bbDecode.get() == 1;
- bool couldArbitrate = bbDecode.get() == 1;
- int numberOfEntries = bbDecode.getInt();
- bool foundAbort = false;
-
- for (int i = 0; i < numberOfEntries; i++) {
- char type = bbDecode.get();
- if (type == Entry.TypeAbort) {
- Abort abort = (Abort)Abort.decode(NULL, bbDecode);
-
- if ((abort.getTransactionMachineId() == localMachineId) && (abort.getTransactionClientLocalSequenceNumber() == transaction.getClientLocalSequenceNumber())) {
- foundAbort = true;
- }
-
- processEntry(abort);
- } else if (type == Entry.TypeCommitPart) {
- CommitPart commitPart = (CommitPart)CommitPart.decode(NULL, bbDecode);
- processEntry(commitPart);
- }
- }
-
- updateLiveStateFromLocal();
-
- if (couldArbitrate) {
- TransactionStatus status = transaction.getTransactionStatus();
- if (didCommit) {
- status.setStatus(TransactionStatus.StatusCommitted);
- } else {
- status.setStatus(TransactionStatus.StatusAborted);
- }
- } else {
- TransactionStatus status = transaction.getTransactionStatus();
- if (foundAbort) {
- status.setStatus(TransactionStatus.StatusAborted);
- } else {
- status.setStatus(TransactionStatus.StatusCommitted);
- }
- }
-
- return new Pair<Boolean, Boolean>(false, true);
- }
-
- public synchronized char[] acceptDataFromLocal(char[] data) {
-
- // Decode the data
- ByteBuffer bbDecode = ByteBuffer.wrap(data);
- int64_t lastArbitratedSequenceNumberSeen = bbDecode.getLong();
- int numberOfParts = bbDecode.getInt();
-
- // If we did commit a transaction or not
- bool didCommit = false;
- bool couldArbitrate = false;
-
- if (numberOfParts != 0) {
-
- // decode the transaction
- Transaction transaction = new Transaction();
- for (int i = 0; i < numberOfParts; i++) {
- bbDecode.get();
- TransactionPart newPart = (TransactionPart)TransactionPart.decode(NULL, bbDecode);
- transaction.addPartDecode(newPart);
- }
-
- // Arbitrate on transaction and pull relevant return data
- Pair<Boolean, Boolean> localArbitrateReturn = arbitrateOnLocalTransaction(transaction);
- couldArbitrate = localArbitrateReturn.getFirst();
- didCommit = localArbitrateReturn.getSecond();
-
- updateLiveStateFromLocal();
-
- // Transaction was sent to the server so keep track of it to prevent double commit
- if (transaction.getSequenceNumber() != -1) {
- offlineTransactionsCommittedAndAtServer.add(transaction.getId());
- }
- }
-
- // The data to send back
- int returnDataSize = 0;
- List<Entry> unseenArbitrations = new ArrayList<Entry>();
-
- // Get the aborts to send back
- List<Long> abortLocalSequenceNumbers = new ArrayList<Long >(liveAbortsGeneratedByLocal.keySet());
- Collections.sort(abortLocalSequenceNumbers);
- for (Long localSequenceNumber : abortLocalSequenceNumbers) {
- if (localSequenceNumber <= lastArbitratedSequenceNumberSeen) {
- continue;
- }
-
- Abort abort = liveAbortsGeneratedByLocal.get(localSequenceNumber);
- unseenArbitrations.add(abort);
- returnDataSize += abort.getSize();
- }
-
- // Get the commits to send back
- Map<Long, Commit> commitForClientTable = liveCommitsTable.get(localMachineId);
- if (commitForClientTable != NULL) {
- List<Long> commitLocalSequenceNumbers = new ArrayList<Long>(commitForClientTable.keySet());
- Collections.sort(commitLocalSequenceNumbers);
-
- for (Long localSequenceNumber : commitLocalSequenceNumbers) {
- Commit commit = commitForClientTable.get(localSequenceNumber);
-
- if (localSequenceNumber <= lastArbitratedSequenceNumberSeen) {
- continue;
- }
-
- unseenArbitrations.addAll(commit.getParts().values());
-
- for (CommitPart commitPart : commit.getParts().values()) {
- returnDataSize += commitPart.getSize();
- }
- }
- }
-
- // Number of arbitration entries to decode
- returnDataSize += 2 * sizeof(int32_t);
-
- // Boolean of did commit or not
- if (numberOfParts != 0) {
- returnDataSize += sizeof(char);
- }
-
- // Data to send Back
- char[] returnData = new char[returnDataSize];
- ByteBuffer bbEncode = ByteBuffer.wrap(returnData);
-
- if (numberOfParts != 0) {
- if (didCommit) {
- bbEncode.put((char)1);
- } else {
- bbEncode.put((char)0);
- }
- if (couldArbitrate) {
- bbEncode.put((char)1);
- } else {
- bbEncode.put((char)0);
- }
- }
-
- bbEncode.putInt(unseenArbitrations.size());
- for (Entry entry : unseenArbitrations) {
- entry.encode(bbEncode);
- }
-
-
- localSequenceNumber++;
- return returnData;
- }
-
- private ThreeTuple<Boolean, Boolean, Slot[]> sendSlotsToServer(Slot slot, int newSize, bool isNewKey) throws ServerException {
-
- bool attemptedToSendToServerTmp = attemptedToSendToServer;
- attemptedToSendToServer = true;
-
- bool inserted = false;
- bool lastTryInserted = false;
-
- Slot[] array = cloud.putSlot(slot, newSize);
- if (array == NULL) {
- array = new Slot[] {slot};
- rejectedSlotList.clear();
- inserted = true;
- } else {
- if (array.length == 0) {
- throw new Error("Server Error: Did not send any slots");
- }
-
- // if (attemptedToSendToServerTmp) {
- if (hadPartialSendToServer) {
-
- bool isInserted = false;
- for (Slot s : array) {
- if ((s.getSequenceNumber() == slot.getSequenceNumber()) && (s.getMachineID() == localMachineId)) {
- isInserted = true;
- break;
- }
- }
-
- for (Slot s : array) {
- if (isInserted) {
- break;
- }
-
- // Process each entry in the slot
- for (Entry entry : s.getEntries()) {
-
- if (entry.getType() == Entry.TypeLastMessage) {
- LastMessage lastMessage = (LastMessage)entry;
-
- if ((lastMessage.getMachineID() == localMachineId) && (lastMessage.getSequenceNumber() == slot.getSequenceNumber())) {
- isInserted = true;
- break;
- }
- }
- }
- }
-
- if (!isInserted) {
- rejectedSlotList.add(slot.getSequenceNumber());
- lastTryInserted = false;
- } else {
- lastTryInserted = true;
- }
- } else {
- rejectedSlotList.add(slot.getSequenceNumber());
- lastTryInserted = false;
- }
- }
-
- return new ThreeTuple<Boolean, Boolean, Slot[]>(inserted, lastTryInserted, array);
- }
-
- /**
- * Returns false if a resize was needed
- */
- private ThreeTuple<Boolean, Integer, Boolean> fillSlot(Slot slot, bool resize, NewKey newKeyEntry) {
-
-
- int newSize = 0;
- if (liveSlotCount > bufferResizeThreshold) {
- resize = true; //Resize is forced
-
- }
-
- if (resize) {
- newSize = (int) (numberOfSlots * RESIZE_MULTIPLE);
- TableStatus status = new TableStatus(slot, newSize);
- slot.addEntry(status);
- }
-
- // Fill with rejected slots first before doing anything else
- doRejectedMessages(slot);
-
- // Do mandatory rescue of entries
- ThreeTuple<Boolean, Boolean, Long> mandatoryRescueReturn = doMandatoryResuce(slot, resize);
-
- // Extract working variables
- bool needsResize = mandatoryRescueReturn.getFirst();
- bool seenLiveSlot = mandatoryRescueReturn.getSecond();
- int64_t currentRescueSequenceNumber = mandatoryRescueReturn.getThird();
-
- if (needsResize && !resize) {
- // We need to resize but we are not resizing so return false
- return new ThreeTuple<Boolean, Integer, Boolean>(true, NULL, NULL);
- }
-
- bool inserted = false;
- if (newKeyEntry != NULL) {
- newKeyEntry.setSlot(slot);
- if (slot.hasSpace(newKeyEntry)) {
-
- slot.addEntry(newKeyEntry);
- inserted = true;
- }
- }
-
- // Clear the transactions, aborts and commits that were sent previously
- transactionPartsSent.clear();
- pendingSendArbitrationEntriesToDelete.clear();
-
- for (ArbitrationRound round : pendingSendArbitrationRounds) {
- bool isFull = false;
- round.generateParts();
- List<Entry> parts = round.getParts();
-
- // Insert pending arbitration data
- for (Entry arbitrationData : parts) {
-
- // If it is an abort then we need to set some information
- if (arbitrationData instanceof Abort) {
- ((Abort)arbitrationData).setSequenceNumber(slot.getSequenceNumber());
- }
-
- if (!slot.hasSpace(arbitrationData)) {
- // No space so cant do anything else with these data entries
- isFull = true;
- break;
- }
-
- // Add to this current slot and add it to entries to delete
- slot.addEntry(arbitrationData);
- pendingSendArbitrationEntriesToDelete.add(arbitrationData);
- }
-
- if (isFull) {
- break;
- }
- }
-
- if (pendingTransactionQueue.size() > 0) {
-
- Transaction transaction = pendingTransactionQueue.get(0);
-
- // Set the transaction sequence number if it has yet to be inserted into the block chain
- // if ((!transaction.didSendAPartToServer() && !transaction.getServerFailure()) || (transaction.getSequenceNumber() == -1)) {
- // transaction.setSequenceNumber(slot.getSequenceNumber());
- // }
-
- if ((!transaction.didSendAPartToServer()) || (transaction.getSequenceNumber() == -1)) {
- transaction.setSequenceNumber(slot.getSequenceNumber());
- }
-
-
- while (true) {
- TransactionPart part = transaction.getNextPartToSend();
-
- if (part == NULL) {
- // Ran out of parts to send for this transaction so move on
- break;
- }
-
- if (slot.hasSpace(part)) {
- slot.addEntry(part);
- List<Integer> partsSent = transactionPartsSent.get(transaction);
- if (partsSent == NULL) {
- partsSent = new ArrayList<Integer>();
- transactionPartsSent.put(transaction, partsSent);
- }
- partsSent.add(part.getPartNumber());
- transactionPartsSent.put(transaction, partsSent);
- } else {
- break;
- }
- }
- }
-
- // Fill the remainder of the slot with rescue data
- doOptionalRescue(slot, seenLiveSlot, currentRescueSequenceNumber, resize);
-
- return new ThreeTuple<Boolean, Integer, Boolean>(false, newSize, inserted);
- }
-
- private void doRejectedMessages(Slot s) {
- if (! rejectedSlotList.isEmpty()) {
- /* TODO: We should avoid generating a rejected message entry if
- * there is already a sufficient entry in the queue (e.g.,
- * equalsto value of true and same sequence number). */
-
- int64_t old_seqn = rejectedSlotList.firstElement();
- if (rejectedSlotList.size() > REJECTED_THRESHOLD) {
- int64_t new_seqn = rejectedSlotList.lastElement();
- RejectedMessage rm = new RejectedMessage(s, s.getSequenceNumber(), localMachineId, old_seqn, new_seqn, false);
- s.addEntry(rm);
- } else {
- int64_t prev_seqn = -1;
- int i = 0;
- /* Go through list of missing messages */
- for (; i < rejectedSlotList.size(); i++) {
- int64_t curr_seqn = rejectedSlotList.get(i);
- Slot s_msg = buffer.getSlot(curr_seqn);
- if (s_msg != NULL)
- break;
- prev_seqn = curr_seqn;
- }
- /* Generate rejected message entry for missing messages */
- if (prev_seqn != -1) {
- RejectedMessage rm = new RejectedMessage(s, s.getSequenceNumber(), localMachineId, old_seqn, prev_seqn, false);
- s.addEntry(rm);
- }
- /* Generate rejected message entries for present messages */
- for (; i < rejectedSlotList.size(); i++) {
- int64_t curr_seqn = rejectedSlotList.get(i);
- Slot s_msg = buffer.getSlot(curr_seqn);
- int64_t machineid = s_msg.getMachineID();
- RejectedMessage rm = new RejectedMessage(s, s.getSequenceNumber(), machineid, curr_seqn, curr_seqn, true);
- s.addEntry(rm);
- }
- }
- }
- }
-
- private ThreeTuple<Boolean, Boolean, Long> doMandatoryResuce(Slot slot, bool resize) {
- int64_t newestSequenceNumber = buffer.getNewestSeqNum();
- int64_t oldestSequenceNumber = buffer.getOldestSeqNum();
- if (oldestLiveSlotSequenceNumver < oldestSequenceNumber) {
- oldestLiveSlotSequenceNumver = oldestSequenceNumber;
- }
-
- int64_t currentSequenceNumber = oldestLiveSlotSequenceNumver;
- bool seenLiveSlot = false;
- int64_t firstIfFull = newestSequenceNumber + 1 - numberOfSlots; // smallest seq number in the buffer if it is full
- int64_t threshold = firstIfFull + FREE_SLOTS; // we want the buffer to be clear of live entries up to this point
-
-
- // Mandatory Rescue
- for (; currentSequenceNumber < threshold; currentSequenceNumber++) {
- Slot previousSlot = buffer.getSlot(currentSequenceNumber);
- // Push slot number forward
- if (! seenLiveSlot) {
- oldestLiveSlotSequenceNumver = currentSequenceNumber;
- }
-
- if (!previousSlot.isLive()) {
- continue;
- }
-
- // We have seen a live slot
- seenLiveSlot = true;
-
- // Get all the live entries for a slot
- Vector<Entry> liveEntries = previousSlot.getLiveEntries(resize);
-
- // Iterate over all the live entries and try to rescue them
- for (Entry liveEntry : liveEntries) {
- if (slot.hasSpace(liveEntry)) {
-
- // Enough space to rescue the entry
- slot.addEntry(liveEntry);
- } else if (currentSequenceNumber == firstIfFull) {
- //if there's no space but the entry is about to fall off the queue
- System.out.println("B"); //?
- return new ThreeTuple<Boolean, Boolean, Long>(true, seenLiveSlot, currentSequenceNumber);
-
- }
- }
- }
-
- // Did not resize
- return new ThreeTuple<Boolean, Boolean, Long>(false, seenLiveSlot, currentSequenceNumber);
- }
-
- private void doOptionalRescue(Slot s, bool seenliveslot, int64_t seqn, bool resize) {
- /* now go through live entries from least to greatest sequence number until
- * either all live slots added, or the slot doesn't have enough room
- * for SKIP_THRESHOLD consecutive entries*/
- int skipcount = 0;
- int64_t newestseqnum = buffer.getNewestSeqNum();
- search:
- for (; seqn <= newestseqnum; seqn++) {
- Slot prevslot = buffer.getSlot(seqn);
- //Push slot number forward
- if (!seenliveslot)
- oldestLiveSlotSequenceNumver = seqn;
-
- if (!prevslot.isLive())
- continue;
- seenliveslot = true;
- Vector<Entry> liveentries = prevslot.getLiveEntries(resize);
- for (Entry liveentry : liveentries) {
- if (s.hasSpace(liveentry))
- s.addEntry(liveentry);
- else {
- skipcount++;
- if (skipcount > SKIP_THRESHOLD)
- break search;
- }
- }
- }
- }
-
- /**
- * Checks for malicious activity and updates the local copy of the block chain.
- */
- private void validateAndUpdate(Slot[] newSlots, bool acceptUpdatesToLocal) {
-
- // The cloud communication layer has checked slot HMACs already before decoding
- if (newSlots.length == 0) {
- return;
- }
-
- // Make sure all slots are newer than the last largest slot this client has seen
- int64_t firstSeqNum = newSlots[0].getSequenceNumber();
- if (firstSeqNum <= sequenceNumber) {
- throw new Error("Server Error: Sent older slots!");
- }
-
- // Create an object that can access both new slots and slots in our local chain
- // without committing slots to our local chain
- SlotIndexer indexer = new SlotIndexer(newSlots, buffer);
-
- // Check that the HMAC chain is not broken
- checkHMACChain(indexer, newSlots);
-
- // Set to keep track of messages from clients
- HashSet<Long> machineSet = new HashSet<Long>(lastMessageTable.keySet());
-
- // Process each slots data
- for (Slot slot : newSlots) {
- processSlot(indexer, slot, acceptUpdatesToLocal, machineSet);
-
- updateExpectedSize();
- }
-
- // If there is a gap, check to see if the server sent us everything.
- if (firstSeqNum != (sequenceNumber + 1)) {
-
- // Check the size of the slots that were sent down by the server.
- // Can only check the size if there was a gap
- checkNumSlots(newSlots.length);
-
- // Since there was a gap every machine must have pushed a slot or must have
- // a last message message. If not then the server is hiding slots
- if (!machineSet.isEmpty()) {
- throw new Error("Missing record for machines: " + machineSet);
- }
- }
-
- // Update the size of our local block chain.
- commitNewMaxSize();
-
- // Commit new to slots to the local block chain.
- for (Slot slot : newSlots) {
-
- // Insert this slot into our local block chain copy.
- buffer.putSlot(slot);
-
- // Keep track of how many slots are currently live (have live data in them).
- liveSlotCount++;
- }
-
- // Get the sequence number of the latest slot in the system
- sequenceNumber = newSlots[newSlots.length - 1].getSequenceNumber();
-
- updateLiveStateFromServer();
-
- // No Need to remember after we pulled from the server
- offlineTransactionsCommittedAndAtServer.clear();
-
- // This is invalidated now
- hadPartialSendToServer = false;
- }
-
- private void updateLiveStateFromServer() {
- // Process the new transaction parts
- processNewTransactionParts();
-
- // Do arbitration on new transactions that were received
- arbitrateFromServer();
-
- // Update all the committed keys
- bool didCommitOrSpeculate = updateCommittedTable();
-
- // Delete the transactions that are now dead
- updateLiveTransactionsAndStatus();
-
- // Do speculations
- didCommitOrSpeculate |= updateSpeculativeTable(didCommitOrSpeculate);
- updatePendingTransactionSpeculativeTable(didCommitOrSpeculate);
- }
+ * IoTTable data structure. Provides client interface.
+ * @author Brian Demsky
+ * @version 1.0
+ */
- private void updateLiveStateFromLocal() {
- // Update all the committed keys
- bool didCommitOrSpeculate = updateCommittedTable();
+/* Constants */
+#define Table_FREE_SLOTS 2
+// Number of slots that should be kept free // 10
+#define Table_SKIP_THRESHOLD 10
+#define Table_RESIZE_MULTIPLE ((double)1.2)
+#define Table_RESIZE_THRESHOLD ((double)0.75)
+#define Table_REJECTED_THRESHOLD 5
- // Delete the transactions that are now dead
- updateLiveTransactionsAndStatus();
+class Table {
+private:
+ /* Helper Objects */
+ SlotBuffer *buffer;
+ CloudComm *cloud;
+ Random *random;
+ TableStatus *liveTableStatus;
+ PendingTransaction *pendingTransactionBuilder; // Pending Transaction used in building a Pending Transaction
+ Transaction *lastPendingTransactionSpeculatedOn; // Last transaction that was speculated on from the pending transaction
+ Transaction *firstPendingTransaction; // first transaction in the pending transaction list
- // Do speculations
- didCommitOrSpeculate |= updateSpeculativeTable(didCommitOrSpeculate);
- updatePendingTransactionSpeculativeTable(didCommitOrSpeculate);
- }
+ /* Variables */
+ int numberOfSlots; // Number of slots stored in buffer
+ int bufferResizeThreshold;// Threshold on the number of live slots before a resize is needed
+ int64_t liveSlotCount;// Number of currently live slots
+ int64_t oldestLiveSlotSequenceNumver; // Smallest sequence number of the slot with a live entry
+ int64_t localMachineId; // Machine ID of this client device
+ int64_t sequenceNumber; // Largest sequence number a client has received
+ int64_t localSequenceNumber;
+
+ // int smallestTableStatusSeen = -1; // Smallest Table Status that was seen in the latest slots sent from the server
+ // int largestTableStatusSeen = -1; // Largest Table Status that was seen in the latest slots sent from the server
+ int64_t localTransactionSequenceNumber; // Local sequence number counter for transactions
+ int64_t lastTransactionSequenceNumberSpeculatedOn; // the last transaction that was speculated on
+ int64_t oldestTransactionSequenceNumberSpeculatedOn; // the oldest transaction that was speculated on
+ int64_t localArbitrationSequenceNumber;
+ bool hadPartialSendToServer;
+ bool attemptedToSendToServer;
+ int64_t expectedsize;
+ bool didFindTableStatus;
+ int64_t currMaxSize;
+
+ Slot *lastSlotAttemptedToSend;
+ bool lastIsNewKey;
+ int lastNewSize;
+ Hashtable<Transaction *, Vector<int32_t> *> *lastTransactionPartsSent;
+ Vector<Entry *> *lastPendingSendArbitrationEntriesToDelete;
+ NewKey *lastNewKey;
- private void initExpectedSize(int64_t firstSequenceNumber, int64_t numberOfSlots) {
- // if (didFindTableStatus) {
- // return;
- // }
- int64_t prevslots = firstSequenceNumber;
+ /* Data Structures */
+ Hashtable<IoTString *, KeyValue *> *committedKeyValueTable;// Table of committed key value pairs
+ Hashtable<IoTString *, KeyValue *> *speculatedKeyValueTable; // Table of speculated key value pairs, if there is a speculative value
+ Hashtable<IoTString *, KeyValue *> *pendingTransactionSpeculatedKeyValueTable; // Table of speculated key value pairs, if there is a speculative value from the pending transactions
+ Hashtable<IoTString *, NewKey *> *liveNewKeyTable; // Table of live new keys
+ Hashtable<int64_t, Pair<int64_t, Liveness *> > *lastMessageTable; // Last message sent by a client machine id -> (Seq Num, Slot or LastMessage);
+ Hashtable<int64_t, Hashset<RejectedMessage *> *> *rejectedMessageWatchVectorTable; // Table of machine Ids and the set of rejected messages they have not seen yet
+ Hashtable<IoTString *, int64_t> *arbitratorTable;// Table of keys and their arbitrators
+ Hashtable<Pair<int64_t, int64_t>, Abort *, uintptr_t, 0, pairHashFunction, pairEquals> *liveAbortTable;// Table live abort messages
+ Hashtable<int64_t, Hashtable<Pair<int64_t, int32_t>, TransactionPart *, uintptr_t, 0, pairHashFunction, pairEquals> *> *newTransactionParts; // transaction parts that are seen in this latest round of slots from the server
+ Hashtable<int64_t, Hashtable<Pair<int64_t, int32_t>, CommitPart *, uintptr_t, 0, pairHashFunction, pairEquals> *> *newCommitParts; // commit parts that are seen in this latest round of slots from the server
+ Hashtable<int64_t, int64_t> *lastArbitratedTransactionNumberByArbitratorTable; // Last transaction sequence number that an arbitrator arbitrated on
+ Hashtable<int64_t, Transaction *> *liveTransactionBySequenceNumberTable; // live transaction grouped by the sequence number
+ Hashtable<Pair<int64_t, int64_t>, Transaction *, uintptr_t, 0, pairHashFunction, pairEquals> *liveTransactionByTransactionIdTable; // live transaction grouped by the transaction ID
+ Hashtable<int64_t, Hashtable<int64_t, Commit *> > *liveCommitsTable;
+ Hashtable<IoTString *, Commit *> *liveCommitsByKeyTable;
+ Hashtable<int64_t, int64_t> *lastCommitSeenSequenceNumberByArbitratorTable;
+ Vector<int64_t> *rejectedSlotVector; // Vector of rejected slots that have yet to be sent to the server
+ Vector<Transaction *> *pendingTransactionQueue;
+ Vector<ArbitrationRound *> *pendingSendArbitrationRounds;
+ Vector<Entry *> *pendingSendArbitrationEntriesToDelete;
+ Hashtable<Transaction *, Vector<int32_t> *> *transactionPartsSent;
+ Hashtable<int64_t, TransactionStatus *> *outstandingTransactionStatus;
+ Hashtable<int64_t, Abort *> *liveAbortsGeneratedByLocal;
+ Hashset<Pair<int64_t, int64_t>, uintptr_t, 0, pairHashFunction, pairEquals> *offlineTransactionsCommittedAndAtServer;
+ Hashtable<int64_t, Pair<IoTString *, int32_t> > *localCommunicationTable;
+ Hashtable<int64_t, int64_t> *lastTransactionSeenFromMachineFromServer;
+ Hashtable<int64_t, int64_t> *lastArbitrationDataLocalSequenceNumberSeenFromArbitrator;
+ bool lastInsertedNewKey;
+ int64_t lastSeqNumArbOn;
+
+
+ void init();
+ /**
+ * Recalculate the new resize threshold
+ */
+ void setResizeThreshold();
+ bool sendToServer(NewKey *newKey);
+ bool updateFromLocal(int64_t machineId);
+ Pair<bool, bool> sendTransactionToLocal(Transaction *transaction);
+ ThreeTuple<bool, bool, Array<Slot *> *> sendSlotsToServer(Slot *slot, int newSize, bool isNewKey);
+ /**
+ * Returns false if a resize was needed
+ */
+ ThreeTuple<bool, int32_t, bool> fillSlot(Slot *slot, bool resize, NewKey *newKeyEntry);
+ void doRejectedMessages(Slot *s);
- if (didFindTableStatus) {
- // expectedsize = (prevslots < ((int64_t) numberOfSlots)) ? (int) prevslots : expectedsize;
- // System.out.println("Here2: " + expectedsize + " " + numberOfSlots + " " + prevslots);
+ ThreeTuple<bool, bool, int64_t> doMandatoryResuce(Slot *slot, bool resize);
- } else {
- expectedsize = (prevslots < ((int64_t) numberOfSlots)) ? (int) prevslots : numberOfSlots;
- // System.out.println("Here: " + expectedsize);
- }
+ void doOptionalRescue(Slot *s, bool seenliveslot, int64_t seqn, bool resize);
+ /**
+ * Checks for malicious activity and updates the local copy of the block chain.
+ */
+ void validateAndUpdate(Array<Slot *> *newSlots, bool acceptUpdatesToLocal);
- // System.out.println(numberOfSlots);
+ void updateLiveStateFromServer();
- didFindTableStatus = true;
- currMaxSize = numberOfSlots;
- }
+ void updateLiveStateFromLocal();
- private void updateExpectedSize() {
- expectedsize++;
+ void initExpectedSize(int64_t firstSequenceNumber, int64_t numberOfSlots);
- if (expectedsize > currMaxSize) {
- expectedsize = currMaxSize;
- }
- }
+ void updateExpectedSize();
/**
* sent by the server therefore in the slots sent by the server there will be at least 1 Table
* status message
*/
- private void checkNumSlots(int numberOfSlots) {
- if (numberOfSlots != expectedsize) {
- throw new Error("Server Error: Server did not send all slots. Expected: " + expectedsize + " Received:" + numberOfSlots);
- }
- }
+ void checkNumSlots(int numberOfSlots);
- private void updateCurrMaxSize(int newmaxsize) {
- currMaxSize = newmaxsize;
- }
+ void updateCurrMaxSize(int newmaxsize) { currMaxSize = newmaxsize; }
/**
* Update the size of of the local buffer if it is needed.
*/
- private void commitNewMaxSize() {
- didFindTableStatus = false;
-
- // Resize the local slot buffer
- if (numberOfSlots != currMaxSize) {
- buffer.resize((int)currMaxSize);
- }
-
- // Change the number of local slots to the new size
- numberOfSlots = (int)currMaxSize;
-
-
- // Recalculate the resize threshold since the size of the local buffer has changed
- setResizeThreshold();
- }
+ void commitNewMaxSize();
/**
* Process the new transaction parts from this latest round of slots received from the server
*/
- private void processNewTransactionParts() {
-
- if (newTransactionParts.size() == 0) {
- // Nothing new to process
- return;
- }
-
- // Iterate through all the machine Ids that we received new parts for
- for (Long machineId : newTransactionParts.keySet()) {
- Map<Pair<Long, Integer>, TransactionPart> parts = newTransactionParts.get(machineId);
-
- // Iterate through all the parts for that machine Id
- for (Pair<Long, Integer> partId : parts.keySet()) {
- TransactionPart part = parts.get(partId);
-
- Long lastTransactionNumber = lastArbitratedTransactionNumberByArbitratorTable.get(part.getArbitratorId());
- if ((lastTransactionNumber != NULL) && (lastTransactionNumber >= part.getSequenceNumber())) {
- // Set dead the transaction part
- part.setDead();
- continue;
- }
-
- // Get the transaction object for that sequence number
- Transaction transaction = liveTransactionBySequenceNumberTable.get(part.getSequenceNumber());
-
- if (transaction == NULL) {
- // This is a new transaction that we dont have so make a new one
- transaction = new Transaction();
-
- // Insert this new transaction into the live tables
- liveTransactionBySequenceNumberTable.put(part.getSequenceNumber(), transaction);
- liveTransactionByTransactionIdTable.put(part.getTransactionId(), transaction);
- }
-
- // Add that part to the transaction
- transaction.addPartDecode(part);
- }
- }
-
- // Clear all the new transaction parts in preparation for the next time the server sends slots
- newTransactionParts.clear();
- }
-
-
- private int64_t lastSeqNumArbOn = 0;
-
- private void arbitrateFromServer() {
-
- if (liveTransactionBySequenceNumberTable.size() == 0) {
- // Nothing to arbitrate on so move on
- return;
- }
-
- // Get the transaction sequence numbers and sort from oldest to newest
- List<Long> transactionSequenceNumbers = new ArrayList<Long>(liveTransactionBySequenceNumberTable.keySet());
- Collections.sort(transactionSequenceNumbers);
-
- // Collection of key value pairs that are
- Map<IoTString, KeyValue> speculativeTableTmp = new HashMap<IoTString, KeyValue>();
-
- // The last transaction arbitrated on
- int64_t lastTransactionCommitted = -1;
- Set<Abort> generatedAborts = new HashSet<Abort>();
-
- for (Long transactionSequenceNumber : transactionSequenceNumbers) {
- Transaction transaction = liveTransactionBySequenceNumberTable.get(transactionSequenceNumber);
-
-
-
- // Check if this machine arbitrates for this transaction if not then we cant arbitrate this transaction
- if (transaction.getArbitrator() != localMachineId) {
- continue;
- }
-
- if (transactionSequenceNumber < lastSeqNumArbOn) {
- continue;
- }
-
- if (offlineTransactionsCommittedAndAtServer.contains(transaction.getId())) {
- // We have seen this already locally so dont commit again
- continue;
- }
-
-
- if (!transaction.isComplete()) {
- // Will arbitrate in incorrect order if we continue so just break
- // Most likely this
- break;
- }
-
-
- // update the largest transaction seen by arbitrator from server
- if (lastTransactionSeenFromMachineFromServer.get(transaction.getMachineId()) == NULL) {
- lastTransactionSeenFromMachineFromServer.put(transaction.getMachineId(), transaction.getClientLocalSequenceNumber());
- } else {
- Long lastTransactionSeenFromMachine = lastTransactionSeenFromMachineFromServer.get(transaction.getMachineId());
- if (transaction.getClientLocalSequenceNumber() > lastTransactionSeenFromMachine) {
- lastTransactionSeenFromMachineFromServer.put(transaction.getMachineId(), transaction.getClientLocalSequenceNumber());
- }
- }
-
- if (transaction.evaluateGuard(committedKeyValueTable, speculativeTableTmp, NULL)) {
- // Guard evaluated as true
-
- // Update the local changes so we can make the commit
- for (KeyValue kv : transaction.getKeyValueUpdateSet()) {
- speculativeTableTmp.put(kv.getKey(), kv);
- }
-
- // Update what the last transaction committed was for use in batch commit
- lastTransactionCommitted = transactionSequenceNumber;
- } else {
- // Guard evaluated was false so create abort
-
- // Create the abort
- Abort newAbort = new Abort(NULL,
- transaction.getClientLocalSequenceNumber(),
- transaction.getSequenceNumber(),
- transaction.getMachineId(),
- transaction.getArbitrator(),
- localArbitrationSequenceNumber);
- localArbitrationSequenceNumber++;
-
- generatedAborts.add(newAbort);
-
- // Insert the abort so we can process
- processEntry(newAbort);
- }
-
- lastSeqNumArbOn = transactionSequenceNumber;
-
- // liveTransactionBySequenceNumberTable.remove(transactionSequenceNumber);
- }
-
- Commit newCommit = NULL;
-
- // If there is something to commit
- if (speculativeTableTmp.size() != 0) {
-
- // Create the commit and increment the commit sequence number
- newCommit = new Commit(localArbitrationSequenceNumber, localMachineId, lastTransactionCommitted);
- localArbitrationSequenceNumber++;
-
- // Add all the new keys to the commit
- for (KeyValue kv : speculativeTableTmp.values()) {
- newCommit.addKV(kv);
- }
-
- // create the commit parts
- newCommit.createCommitParts();
-
- // Append all the commit parts to the end of the pending queue waiting for sending to the server
-
- // Insert the commit so we can process it
- for (CommitPart commitPart : newCommit.getParts().values()) {
- processEntry(commitPart);
- }
- }
-
- if ((newCommit != NULL) || (generatedAborts.size() > 0)) {
- ArbitrationRound arbitrationRound = new ArbitrationRound(newCommit, generatedAborts);
- pendingSendArbitrationRounds.add(arbitrationRound);
-
- if (compactArbitrationData()) {
- ArbitrationRound newArbitrationRound = pendingSendArbitrationRounds.get(pendingSendArbitrationRounds.size() - 1);
- if (newArbitrationRound.getCommit() != NULL) {
- for (CommitPart commitPart : newArbitrationRound.getCommit().getParts().values()) {
- processEntry(commitPart);
- }
- }
- }
- }
- }
-
- private Pair<Boolean, Boolean> arbitrateOnLocalTransaction(Transaction transaction) {
+ void processNewTransactionParts();
- // Check if this machine arbitrates for this transaction if not then we cant arbitrate this transaction
- if (transaction.getArbitrator() != localMachineId) {
- return new Pair<Boolean, Boolean>(false, false);
- }
- if (!transaction.isComplete()) {
- // Will arbitrate in incorrect order if we continue so just break
- // Most likely this
- return new Pair<Boolean, Boolean>(false, false);
- }
- if (transaction.getMachineId() != localMachineId) {
- // dont do this check for local transactions
- if (lastTransactionSeenFromMachineFromServer.get(transaction.getMachineId()) != NULL) {
- if (lastTransactionSeenFromMachineFromServer.get(transaction.getMachineId()) > transaction.getClientLocalSequenceNumber()) {
- // We've have already seen this from the server
- return new Pair<Boolean, Boolean>(false, false);
- }
- }
- }
+ void arbitrateFromServer();
- if (transaction.evaluateGuard(committedKeyValueTable, NULL, NULL)) {
- // Guard evaluated as true
-
- // Create the commit and increment the commit sequence number
- Commit newCommit = new Commit(localArbitrationSequenceNumber, localMachineId, -1);
- localArbitrationSequenceNumber++;
-
- // Update the local changes so we can make the commit
- for (KeyValue kv : transaction.getKeyValueUpdateSet()) {
- newCommit.addKV(kv);
- }
-
- // create the commit parts
- newCommit.createCommitParts();
-
- // Append all the commit parts to the end of the pending queue waiting for sending to the server
- ArbitrationRound arbitrationRound = new ArbitrationRound(newCommit, new HashSet<Abort>());
- pendingSendArbitrationRounds.add(arbitrationRound);
-
- if (compactArbitrationData()) {
- ArbitrationRound newArbitrationRound = pendingSendArbitrationRounds.get(pendingSendArbitrationRounds.size() - 1);
- for (CommitPart commitPart : newArbitrationRound.getCommit().getParts().values()) {
- processEntry(commitPart);
- }
- } else {
- // Insert the commit so we can process it
- for (CommitPart commitPart : newCommit.getParts().values()) {
- processEntry(commitPart);
- }
- }
-
- if (transaction.getMachineId() == localMachineId) {
- TransactionStatus status = transaction.getTransactionStatus();
- if (status != NULL) {
- status.setStatus(TransactionStatus.StatusCommitted);
- }
- }
-
- updateLiveStateFromLocal();
- return new Pair<Boolean, Boolean>(true, true);
- } else {
-
- if (transaction.getMachineId() == localMachineId) {
- // For locally created messages update the status
-
- // Guard evaluated was false so create abort
- TransactionStatus status = transaction.getTransactionStatus();
- if (status != NULL) {
- status.setStatus(TransactionStatus.StatusAborted);
- }
- } else {
- Set addAbortSet = new HashSet<Abort>();
-
-
- // Create the abort
- Abort newAbort = new Abort(NULL,
- transaction.getClientLocalSequenceNumber(),
- -1,
- transaction.getMachineId(),
- transaction.getArbitrator(),
- localArbitrationSequenceNumber);
- localArbitrationSequenceNumber++;
-
- addAbortSet.add(newAbort);
-
-
- // Append all the commit parts to the end of the pending queue waiting for sending to the server
- ArbitrationRound arbitrationRound = new ArbitrationRound(NULL, addAbortSet);
- pendingSendArbitrationRounds.add(arbitrationRound);
-
- if (compactArbitrationData()) {
- ArbitrationRound newArbitrationRound = pendingSendArbitrationRounds.get(pendingSendArbitrationRounds.size() - 1);
- for (CommitPart commitPart : newArbitrationRound.getCommit().getParts().values()) {
- processEntry(commitPart);
- }
- }
- }
-
- updateLiveStateFromLocal();
- return new Pair<Boolean, Boolean>(true, false);
- }
- }
+ Pair<bool, bool> arbitrateOnLocalTransaction(Transaction *transaction);
/**
* Compacts the arbitration data my merging commits and aggregating aborts so that a single large push of commits can be done instead of many small updates
*/
- private bool compactArbitrationData() {
-
- if (pendingSendArbitrationRounds.size() < 2) {
- // Nothing to compact so do nothing
- return false;
- }
-
- ArbitrationRound lastRound = pendingSendArbitrationRounds.get(pendingSendArbitrationRounds.size() - 1);
- if (lastRound.didSendPart()) {
- return false;
- }
-
- bool hadCommit = (lastRound.getCommit() == NULL);
- bool gotNewCommit = false;
-
- int numberToDelete = 1;
- while (numberToDelete < pendingSendArbitrationRounds.size()) {
- ArbitrationRound round = pendingSendArbitrationRounds.get(pendingSendArbitrationRounds.size() - numberToDelete - 1);
-
- if (round.isFull() || round.didSendPart()) {
- // Stop since there is a part that cannot be compacted and we need to compact in order
- break;
- }
-
- if (round.getCommit() == NULL) {
-
- // Try compacting aborts only
- int newSize = round.getCurrentSize() + lastRound.getAbortsCount();
- if (newSize > ArbitrationRound.MAX_PARTS) {
- // Cant compact since it would be too large
- break;
- }
- lastRound.addAborts(round.getAborts());
- } else {
-
- // Create a new larger commit
- Commit newCommit = Commit.merge(lastRound.getCommit(), round.getCommit(), localArbitrationSequenceNumber);
- localArbitrationSequenceNumber++;
-
- // Create the commit parts so that we can count them
- newCommit.createCommitParts();
-
- // Calculate the new size of the parts
- int newSize = newCommit.getNumberOfParts();
- newSize += lastRound.getAbortsCount();
- newSize += round.getAbortsCount();
-
- if (newSize > ArbitrationRound.MAX_PARTS) {
- // Cant compact since it would be too large
- break;
- }
-
- // Set the new compacted part
- lastRound.setCommit(newCommit);
- lastRound.addAborts(round.getAborts());
- gotNewCommit = true;
- }
-
- numberToDelete++;
- }
-
- if (numberToDelete != 1) {
- // If there is a compaction
-
- // Delete the previous pieces that are now in the new compacted piece
- if (numberToDelete == pendingSendArbitrationRounds.size()) {
- pendingSendArbitrationRounds.clear();
- } else {
- for (int i = 0; i < numberToDelete; i++) {
- pendingSendArbitrationRounds.remove(pendingSendArbitrationRounds.size() - 1);
- }
- }
-
- // Add the new compacted into the pending to send list
- pendingSendArbitrationRounds.add(lastRound);
-
- // Should reinsert into the commit processor
- if (hadCommit && gotNewCommit) {
- return true;
- }
- }
-
- return false;
- }
- // private bool compactArbitrationData() {
- // return false;
- // }
+ bool compactArbitrationData();
/**
* Update all the commits and the committed tables, sets dead the dead transactions
*/
- private bool updateCommittedTable() {
-
- if (newCommitParts.size() == 0) {
- // Nothing new to process
- return false;
- }
-
- // Iterate through all the machine Ids that we received new parts for
- for (Long machineId : newCommitParts.keySet()) {
- Map<Pair<Long, Integer>, CommitPart> parts = newCommitParts.get(machineId);
-
- // Iterate through all the parts for that machine Id
- for (Pair<Long, Integer> partId : parts.keySet()) {
- CommitPart part = parts.get(partId);
-
- // Get the transaction object for that sequence number
- Map<Long, Commit> commitForClientTable = liveCommitsTable.get(part.getMachineId());
-
- if (commitForClientTable == NULL) {
- // This is the first commit from this device
- commitForClientTable = new HashMap<Long, Commit>();
- liveCommitsTable.put(part.getMachineId(), commitForClientTable);
- }
-
- Commit commit = commitForClientTable.get(part.getSequenceNumber());
-
- if (commit == NULL) {
- // This is a new commit that we dont have so make a new one
- commit = new Commit();
-
- // Insert this new commit into the live tables
- commitForClientTable.put(part.getSequenceNumber(), commit);
- }
-
- // Add that part to the commit
- commit.addPartDecode(part);
- }
- }
-
- // Clear all the new commits parts in preparation for the next time the server sends slots
- newCommitParts.clear();
-
- // If we process a new commit keep track of it for future use
- bool didProcessANewCommit = false;
-
- // Process the commits one by one
- for (Long arbitratorId : liveCommitsTable.keySet()) {
-
- // Get all the commits for a specific arbitrator
- Map<Long, Commit> commitForClientTable = liveCommitsTable.get(arbitratorId);
-
- // Sort the commits in order
- List<Long> commitSequenceNumbers = new ArrayList<Long>(commitForClientTable.keySet());
- Collections.sort(commitSequenceNumbers);
-
- // Get the last commit seen from this arbitrator
- int64_t lastCommitSeenSequenceNumber = -1;
- if (lastCommitSeenSequenceNumberByArbitratorTable.get(arbitratorId) != NULL) {
- lastCommitSeenSequenceNumber = lastCommitSeenSequenceNumberByArbitratorTable.get(arbitratorId);
- }
-
- // Go through each new commit one by one
- for (int i = 0; i < commitSequenceNumbers.size(); i++) {
- Long commitSequenceNumber = commitSequenceNumbers.get(i);
- Commit commit = commitForClientTable.get(commitSequenceNumber);
-
- // Special processing if a commit is not complete
- if (!commit.isComplete()) {
- if (i == (commitSequenceNumbers.size() - 1)) {
- // If there is an incomplete commit and this commit is the latest one seen then this commit cannot be processed and there are no other commits
- break;
- } else {
- // This is a commit that was already dead but parts of it are still in the block chain (not flushed out yet).
- // Delete it and move on
- commit.setDead();
- commitForClientTable.remove(commit.getSequenceNumber());
- continue;
- }
- }
-
- // Update the last transaction that was updated if we can
- if (commit.getTransactionSequenceNumber() != -1) {
- Long lastTransactionNumber = lastArbitratedTransactionNumberByArbitratorTable.get(commit.getMachineId());
-
- // Update the last transaction sequence number that the arbitrator arbitrated on
- if ((lastTransactionNumber == NULL) || (lastTransactionNumber < commit.getTransactionSequenceNumber())) {
- lastArbitratedTransactionNumberByArbitratorTable.put(commit.getMachineId(), commit.getTransactionSequenceNumber());
- }
- }
-
- // Update the last arbitration data that we have seen so far
- if (lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.get(commit.getMachineId()) != NULL) {
-
- int64_t lastArbitrationSequenceNumber = lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.get(commit.getMachineId());
- if (commit.getSequenceNumber() > lastArbitrationSequenceNumber) {
- // Is larger
- lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.put(commit.getMachineId(), commit.getSequenceNumber());
- }
- } else {
- // Never seen any data from this arbitrator so record the first one
- lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.put(commit.getMachineId(), commit.getSequenceNumber());
- }
-
- // We have already seen this commit before so need to do the full processing on this commit
- if (commit.getSequenceNumber() <= lastCommitSeenSequenceNumber) {
-
- // Update the last transaction that was updated if we can
- if (commit.getTransactionSequenceNumber() != -1) {
- Long lastTransactionNumber = lastArbitratedTransactionNumberByArbitratorTable.get(commit.getMachineId());
-
- // Update the last transaction sequence number that the arbitrator arbitrated on
- if ((lastTransactionNumber == NULL) || (lastTransactionNumber < commit.getTransactionSequenceNumber())) {
- lastArbitratedTransactionNumberByArbitratorTable.put(commit.getMachineId(), commit.getTransactionSequenceNumber());
- }
- }
-
- continue;
- }
-
- // If we got here then this is a brand new commit and needs full processing
-
- // Get what commits should be edited, these are the commits that have live values for their keys
- Set<Commit> commitsToEdit = new HashSet<Commit>();
- for (KeyValue kv : commit.getKeyValueUpdateSet()) {
- commitsToEdit.add(liveCommitsByKeyTable.get(kv.getKey()));
- }
- commitsToEdit.remove(NULL); // remove NULL since it could be in this set
-
- // Update each previous commit that needs to be updated
- for (Commit previousCommit : commitsToEdit) {
-
- // Only bother with live commits (TODO: Maybe remove this check)
- if (previousCommit.isLive()) {
-
- // Update which keys in the old commits are still live
- for (KeyValue kv : commit.getKeyValueUpdateSet()) {
- previousCommit.invalidateKey(kv.getKey());
- }
-
- // if the commit is now dead then remove it
- if (!previousCommit.isLive()) {
- commitForClientTable.remove(previousCommit);
- }
- }
- }
-
- // Update the last seen sequence number from this arbitrator
- if (lastCommitSeenSequenceNumberByArbitratorTable.get(commit.getMachineId()) != NULL) {
- if (commit.getSequenceNumber() > lastCommitSeenSequenceNumberByArbitratorTable.get(commit.getMachineId())) {
- lastCommitSeenSequenceNumberByArbitratorTable.put(commit.getMachineId(), commit.getSequenceNumber());
- }
- } else {
- lastCommitSeenSequenceNumberByArbitratorTable.put(commit.getMachineId(), commit.getSequenceNumber());
- }
-
- // We processed a new commit that we havent seen before
- didProcessANewCommit = true;
-
- // Update the committed table of keys and which commit is using which key
- for (KeyValue kv : commit.getKeyValueUpdateSet()) {
- committedKeyValueTable.put(kv.getKey(), kv);
- liveCommitsByKeyTable.put(kv.getKey(), commit);
- }
- }
- }
-
- return didProcessANewCommit;
- }
+ bool updateCommittedTable();
/**
* Create the speculative table from transactions that are still live and have come from the cloud
*/
- private bool updateSpeculativeTable(bool didProcessNewCommits) {
- if (liveTransactionBySequenceNumberTable.keySet().size() == 0) {
- // There is nothing to speculate on
- return false;
- }
-
- // Create a list of the transaction sequence numbers and sort them from oldest to newest
- List<Long> transactionSequenceNumbersSorted = new ArrayList<Long>(liveTransactionBySequenceNumberTable.keySet());
- Collections.sort(transactionSequenceNumbersSorted);
-
- bool hasGapInTransactionSequenceNumbers = transactionSequenceNumbersSorted.get(0) != oldestTransactionSequenceNumberSpeculatedOn;
-
-
- if (hasGapInTransactionSequenceNumbers || didProcessNewCommits) {
- // If there is a gap in the transaction sequence numbers then there was a commit or an abort of a transaction
- // OR there was a new commit (Could be from offline commit) so a redo the speculation from scratch
-
- // Start from scratch
- speculatedKeyValueTable.clear();
- lastTransactionSequenceNumberSpeculatedOn = -1;
- oldestTransactionSequenceNumberSpeculatedOn = -1;
-
- }
-
- // Remember the front of the transaction list
- oldestTransactionSequenceNumberSpeculatedOn = transactionSequenceNumbersSorted.get(0);
-
- // Find where to start arbitration from
- int startIndex = transactionSequenceNumbersSorted.indexOf(lastTransactionSequenceNumberSpeculatedOn) + 1;
-
- if (startIndex >= transactionSequenceNumbersSorted.size()) {
- // Make sure we are not out of bounds
- return false; // did not speculate
- }
-
- Set<Long> incompleteTransactionArbitrator = new HashSet<Long>();
- bool didSkip = true;
-
- for (int i = startIndex; i < transactionSequenceNumbersSorted.size(); i++) {
- int64_t transactionSequenceNumber = transactionSequenceNumbersSorted.get(i);
- Transaction transaction = liveTransactionBySequenceNumberTable.get(transactionSequenceNumber);
-
- if (!transaction.isComplete()) {
- // If there is an incomplete transaction then there is nothing we can do
- // add this transactions arbitrator to the list of arbitrators we should ignore
- incompleteTransactionArbitrator.add(transaction.getArbitrator());
- didSkip = true;
- continue;
- }
-
- if (incompleteTransactionArbitrator.contains(transaction.getArbitrator())) {
- continue;
- }
-
- lastTransactionSequenceNumberSpeculatedOn = transactionSequenceNumber;
-
- if (transaction.evaluateGuard(committedKeyValueTable, speculatedKeyValueTable, NULL)) {
- // Guard evaluated to true so update the speculative table
- for (KeyValue kv : transaction.getKeyValueUpdateSet()) {
- speculatedKeyValueTable.put(kv.getKey(), kv);
- }
- }
- }
-
- if (didSkip) {
- // Since there was a skip we need to redo the speculation next time around
- lastTransactionSequenceNumberSpeculatedOn = -1;
- oldestTransactionSequenceNumberSpeculatedOn = -1;
- }
-
- // We did some speculation
- return true;
- }
+ bool updateSpeculativeTable(bool didProcessNewCommits);
/**
* Create the pending transaction speculative table from transactions that are still in the pending transaction buffer
*/
- private void updatePendingTransactionSpeculativeTable(bool didProcessNewCommitsOrSpeculate) {
- if (pendingTransactionQueue.size() == 0) {
- // There is nothing to speculate on
- return;
- }
-
-
- if (didProcessNewCommitsOrSpeculate || (firstPendingTransaction != pendingTransactionQueue.get(0))) {
- // need to reset on the pending speculation
- lastPendingTransactionSpeculatedOn = NULL;
- firstPendingTransaction = pendingTransactionQueue.get(0);
- pendingTransactionSpeculatedKeyValueTable.clear();
- }
-
- // Find where to start arbitration from
- int startIndex = pendingTransactionQueue.indexOf(firstPendingTransaction) + 1;
-
- if (startIndex >= pendingTransactionQueue.size()) {
- // Make sure we are not out of bounds
- return;
- }
-
- for (int i = startIndex; i < pendingTransactionQueue.size(); i++) {
- Transaction transaction = pendingTransactionQueue.get(i);
-
- lastPendingTransactionSpeculatedOn = transaction;
-
- if (transaction.evaluateGuard(committedKeyValueTable, speculatedKeyValueTable, pendingTransactionSpeculatedKeyValueTable)) {
- // Guard evaluated to true so update the speculative table
- for (KeyValue kv : transaction.getKeyValueUpdateSet()) {
- pendingTransactionSpeculatedKeyValueTable.put(kv.getKey(), kv);
- }
- }
- }
- }
+ void updatePendingTransactionSpeculativeTable(bool didProcessNewCommitsOrSpeculate);
/**
* Set dead and remove from the live transaction tables the transactions that are dead
*/
- private void updateLiveTransactionsAndStatus() {
-
- // Go through each of the transactions
- for (Iterator<Map.Entry<Long, Transaction>> iter = liveTransactionBySequenceNumberTable.entrySet().iterator(); iter.hasNext();) {
- Transaction transaction = iter.next().getValue();
-
- // Check if the transaction is dead
- Long lastTransactionNumber = lastArbitratedTransactionNumberByArbitratorTable.get(transaction.getArbitrator());
- if ((lastTransactionNumber != NULL) && (lastTransactionNumber >= transaction.getSequenceNumber())) {
-
- // Set dead the transaction
- transaction.setDead();
-
- // Remove the transaction from the live table
- iter.remove();
- liveTransactionByTransactionIdTable.remove(transaction.getId());
- }
- }
-
- // Go through each of the transactions
- for (Iterator<Map.Entry<Long, TransactionStatus>> iter = outstandingTransactionStatus.entrySet().iterator(); iter.hasNext();) {
- TransactionStatus status = iter.next().getValue();
-
- // Check if the transaction is dead
- Long lastTransactionNumber = lastArbitratedTransactionNumberByArbitratorTable.get(status.getTransactionArbitrator());
- if ((lastTransactionNumber != NULL) && (lastTransactionNumber >= status.getTransactionSequenceNumber())) {
-
- // Set committed
- status.setStatus(TransactionStatus.StatusCommitted);
-
- // Remove
- iter.remove();
- }
- }
- }
+ void updateLiveTransactionsAndStatus();
/**
* Process this slot, entry by entry. Also update the latest message sent by slot
*/
- private void processSlot(SlotIndexer indexer, Slot slot, bool acceptUpdatesToLocal, HashSet<Long> machineSet) {
-
- // Update the last message seen
- updateLastMessage(slot.getMachineID(), slot.getSequenceNumber(), slot, acceptUpdatesToLocal, machineSet);
-
- // Process each entry in the slot
- for (Entry entry : slot.getEntries()) {
- switch (entry.getType()) {
-
- case Entry.TypeCommitPart:
- processEntry((CommitPart)entry);
- break;
-
- case Entry.TypeAbort:
- processEntry((Abort)entry);
- break;
-
- case Entry.TypeTransactionPart:
- processEntry((TransactionPart)entry);
- break;
-
- case Entry.TypeNewKey:
- processEntry((NewKey)entry);
- break;
-
- case Entry.TypeLastMessage:
- processEntry((LastMessage)entry, machineSet);
- break;
-
- case Entry.TypeRejectedMessage:
- processEntry((RejectedMessage)entry, indexer);
- break;
-
- case Entry.TypeTableStatus:
- processEntry((TableStatus)entry, slot.getSequenceNumber());
- break;
-
- default:
- throw new Error("Unrecognized type: " + entry.getType());
- }
- }
- }
+ void processSlot(SlotIndexer *indexer, Slot *slot, bool acceptUpdatesToLocal, Hashset<int64_t> *machineSet);
/**
* Update the last message that was sent for a machine Id
*/
- private void processEntry(LastMessage entry, HashSet<Long> machineSet) {
- // Update what the last message received by a machine was
- updateLastMessage(entry.getMachineID(), entry.getSequenceNumber(), entry, false, machineSet);
- }
+ void processEntry(LastMessage *entry, Hashset<int64_t> *machineSet);
/**
* Add the new key to the arbitrators table and update the set of live new keys (in case of a rescued new key message)
*/
- private void processEntry(NewKey entry) {
-
- // Update the arbitrator table with the new key information
- arbitratorTable.put(entry.getKey(), entry.getMachineID());
-
- // Update what the latest live new key is
- NewKey oldNewKey = liveNewKeyTable.put(entry.getKey(), entry);
- if (oldNewKey != NULL) {
- // Delete the old new key messages
- oldNewKey.setDead();
- }
- }
+ void processEntry(NewKey *entry);
/**
* Process new table status entries and set dead the old ones as new ones come in.
* keeps track of the largest and smallest table status seen in this current round
* of updating the local copy of the block chain
*/
- private void processEntry(TableStatus entry, int64_t seq) {
- int newNumSlots = entry.getMaxSlots();
- updateCurrMaxSize(newNumSlots);
-
- initExpectedSize(seq, newNumSlots);
-
- if (liveTableStatus != NULL) {
- // We have a larger table status so the old table status is no int64_ter alive
- liveTableStatus.setDead();
- }
-
- // Make this new table status the latest alive table status
- liveTableStatus = entry;
- }
+ void processEntry(TableStatus *entry, int64_t seq);
/**
* Check old messages to see if there is a block chain violation. Also
*/
- private void processEntry(RejectedMessage entry, SlotIndexer indexer) {
- int64_t oldSeqNum = entry.getOldSeqNum();
- int64_t newSeqNum = entry.getNewSeqNum();
- bool isequal = entry.getEqual();
- int64_t machineId = entry.getMachineID();
- int64_t seq = entry.getSequenceNumber();
-
-
- // Check if we have messages that were supposed to be rejected in our local block chain
- for (int64_t seqNum = oldSeqNum; seqNum <= newSeqNum; seqNum++) {
-
- // Get the slot
- Slot slot = indexer.getSlot(seqNum);
-
- if (slot != NULL) {
- // If we have this slot make sure that it was not supposed to be a rejected slot
-
- int64_t slotMachineId = slot.getMachineID();
- if (isequal != (slotMachineId == machineId)) {
- throw new Error("Server Error: Trying to insert rejected message for slot " + seqNum);
- }
- }
- }
-
-
- // Create a list of clients to watch until they see this rejected message entry.
- HashSet<Long> deviceWatchSet = new HashSet<Long>();
- for (Map.Entry<Long, Pair<Long, Liveness>> lastMessageEntry : lastMessageTable.entrySet()) {
-
- // Machine ID for the last message entry
- int64_t lastMessageEntryMachineId = lastMessageEntry.getKey();
-
- // We've seen it, don't need to continue to watch. Our next
- // message will implicitly acknowledge it.
- if (lastMessageEntryMachineId == localMachineId) {
- continue;
- }
-
- Pair<Long, Liveness> lastMessageValue = lastMessageEntry.getValue();
- int64_t entrySequenceNumber = lastMessageValue.getFirst();
-
- if (entrySequenceNumber < seq) {
-
- // Add this rejected message to the set of messages that this machine ID did not see yet
- addWatchList(lastMessageEntryMachineId, entry);
-
- // This client did not see this rejected message yet so add it to the watch set to monitor
- deviceWatchSet.add(lastMessageEntryMachineId);
- }
- }
-
- if (deviceWatchSet.isEmpty()) {
- // This rejected message has been seen by all the clients so
- entry.setDead();
- } else {
- // We need to watch this rejected message
- entry.setWatchSet(deviceWatchSet);
- }
- }
+ void processEntry(RejectedMessage *entry, SlotIndexer *indexer);
/**
* Check if this abort is live, if not then save it so we can kill it later.
* update the last transaction number that was arbitrated on.
*/
- private void processEntry(Abort entry) {
-
-
- if (entry.getTransactionSequenceNumber() != -1) {
- // update the transaction status if it was sent to the server
- TransactionStatus status = outstandingTransactionStatus.remove(entry.getTransactionSequenceNumber());
- if (status != NULL) {
- status.setStatus(TransactionStatus.StatusAborted);
- }
- }
-
- // Abort has not been seen by the client it is for yet so we need to keep track of it
- Abort previouslySeenAbort = liveAbortTable.put(entry.getAbortId(), entry);
- if (previouslySeenAbort != NULL) {
- previouslySeenAbort.setDead(); // Delete old version of the abort since we got a rescued newer version
- }
-
- if (entry.getTransactionArbitrator() == localMachineId) {
- liveAbortsGeneratedByLocal.put(entry.getArbitratorLocalSequenceNumber(), entry);
- }
-
- if ((entry.getSequenceNumber() != -1) && (lastMessageTable.get(entry.getTransactionMachineId()).getFirst() >= entry.getSequenceNumber())) {
-
- // The machine already saw this so it is dead
- entry.setDead();
- liveAbortTable.remove(entry.getAbortId());
-
- if (entry.getTransactionArbitrator() == localMachineId) {
- liveAbortsGeneratedByLocal.remove(entry.getArbitratorLocalSequenceNumber());
- }
-
- return;
- }
-
-
-
-
- // Update the last arbitration data that we have seen so far
- if (lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.get(entry.getTransactionArbitrator()) != NULL) {
-
- int64_t lastArbitrationSequenceNumber = lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.get(entry.getTransactionArbitrator());
- if (entry.getSequenceNumber() > lastArbitrationSequenceNumber) {
- // Is larger
- lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.put(entry.getTransactionArbitrator(), entry.getSequenceNumber());
- }
- } else {
- // Never seen any data from this arbitrator so record the first one
- lastArbitrationDataLocalSequenceNumberSeenFromArbitrator.put(entry.getTransactionArbitrator(), entry.getSequenceNumber());
- }
-
-
- // Set dead a transaction if we can
- Transaction transactionToSetDead = liveTransactionByTransactionIdTable.remove(new Pair<Long, Long>(entry.getTransactionMachineId(), entry.getTransactionClientLocalSequenceNumber()));
- if (transactionToSetDead != NULL) {
- liveTransactionBySequenceNumberTable.remove(transactionToSetDead.getSequenceNumber());
- }
-
- // Update the last transaction sequence number that the arbitrator arbitrated on
- Long lastTransactionNumber = lastArbitratedTransactionNumberByArbitratorTable.get(entry.getTransactionArbitrator());
- if ((lastTransactionNumber == NULL) || (lastTransactionNumber < entry.getTransactionSequenceNumber())) {
-
- // Is a valid one
- if (entry.getTransactionSequenceNumber() != -1) {
- lastArbitratedTransactionNumberByArbitratorTable.put(entry.getTransactionArbitrator(), entry.getTransactionSequenceNumber());
- }
- }
- }
+ void processEntry(Abort *entry);
/**
* Set dead the transaction part if that transaction is dead and keep track of all new parts
*/
- private void processEntry(TransactionPart entry) {
- // Check if we have already seen this transaction and set it dead OR if it is not alive
- Long lastTransactionNumber = lastArbitratedTransactionNumberByArbitratorTable.get(entry.getArbitratorId());
- if ((lastTransactionNumber != NULL) && (lastTransactionNumber >= entry.getSequenceNumber())) {
- // This transaction is dead, it was already committed or aborted
- entry.setDead();
- return;
- }
-
- // This part is still alive
- Map<Pair<Long, Integer>, TransactionPart> transactionPart = newTransactionParts.get(entry.getMachineId());
-
- if (transactionPart == NULL) {
- // Dont have a table for this machine Id yet so make one
- transactionPart = new HashMap<Pair<Long, Integer>, TransactionPart>();
- newTransactionParts.put(entry.getMachineId(), transactionPart);
- }
-
- // Update the part and set dead ones we have already seen (got a rescued version)
- TransactionPart previouslySeenPart = transactionPart.put(entry.getPartId(), entry);
- if (previouslySeenPart != NULL) {
- previouslySeenPart.setDead();
- }
- }
+ void processEntry(TransactionPart *entry);
/**
* Process new commit entries and save them for future use. Delete duplicates
*/
- private void processEntry(CommitPart entry) {
-
-
- // Update the last transaction that was updated if we can
- if (entry.getTransactionSequenceNumber() != -1) {
- Long lastTransactionNumber = lastArbitratedTransactionNumberByArbitratorTable.get(entry.getMachineId());
-
- // Update the last transaction sequence number that the arbitrator arbitrated on
- if ((lastTransactionNumber == NULL) || (lastTransactionNumber < entry.getTransactionSequenceNumber())) {
- lastArbitratedTransactionNumberByArbitratorTable.put(entry.getMachineId(), entry.getTransactionSequenceNumber());
- }
- }
-
-
-
-
- Map<Pair<Long, Integer>, CommitPart> commitPart = newCommitParts.get(entry.getMachineId());
-
- if (commitPart == NULL) {
- // Don't have a table for this machine Id yet so make one
- commitPart = new HashMap<Pair<Long, Integer>, CommitPart>();
- newCommitParts.put(entry.getMachineId(), commitPart);
- }
-
- // Update the part and set dead ones we have already seen (got a rescued version)
- CommitPart previouslySeenPart = commitPart.put(entry.getPartId(), entry);
- if (previouslySeenPart != NULL) {
- previouslySeenPart.setDead();
- }
- }
+ void processEntry(CommitPart *entry);
/**
* Update the last message seen table. Update and set dead the appropriate RejectedMessages as clients see them.
* Check that the last message seen is correct and that there is no mismatch of our own last message or that
* other clients have not had a rollback on the last message.
*/
- private void updateLastMessage(int64_t machineId, int64_t seqNum, Liveness liveness, bool acceptUpdatesToLocal, HashSet<Long> machineSet) {
-
- // We have seen this machine ID
- machineSet.remove(machineId);
+ void updateLastMessage(int64_t machineId, int64_t seqNum, Liveness *liveness, bool acceptUpdatesToLocal, Hashset<int64_t> *machineSet);
- // Get the set of rejected messages that this machine Id is has not seen yet
- HashSet<RejectedMessage> watchset = rejectedMessageWatchListTable.get(machineId);
-
- // If there is a rejected message that this machine Id has not seen yet
- if (watchset != NULL) {
-
- // Go through each rejected message that this machine Id has not seen yet
- for (Iterator<RejectedMessage> rmit = watchset.iterator(); rmit.hasNext(); ) {
-
- RejectedMessage rm = rmit.next();
-
- // If this machine Id has seen this rejected message...
- if (rm.getSequenceNumber() <= seqNum) {
-
- // Remove it from our watchlist
- rmit.remove();
-
- // Decrement machines that need to see this notification
- rm.removeWatcher(machineId);
- }
- }
- }
-
- // Set dead the abort
- for (Iterator<Map.Entry<Pair<Long, Long>, Abort>> i = liveAbortTable.entrySet().iterator(); i.hasNext();) {
- Abort abort = i.next().getValue();
-
- if ((abort.getTransactionMachineId() == machineId) && (abort.getSequenceNumber() <= seqNum)) {
- abort.setDead();
- i.remove();
-
- if (abort.getTransactionArbitrator() == localMachineId) {
- liveAbortsGeneratedByLocal.remove(abort.getArbitratorLocalSequenceNumber());
- }
- }
- }
-
-
-
- if (machineId == localMachineId) {
- // Our own messages are immediately dead.
- if (liveness instanceof LastMessage) {
- ((LastMessage)liveness).setDead();
- } else if (liveness instanceof Slot) {
- ((Slot)liveness).setDead();
- } else {
- throw new Error("Unrecognized type");
- }
- }
+ /**
+ * Add a rejected message entry to the watch set to keep track of which clients have seen that
+ * rejected message entry and which have not.
+ */
+ void addWatchVector(int64_t machineId, RejectedMessage *entry);
- // Get the old last message for this device
- Pair<Long, Liveness> lastMessageEntry = lastMessageTable.put(machineId, new Pair<Long, Liveness>(seqNum, liveness));
- if (lastMessageEntry == NULL) {
- // If no last message then there is nothing else to process
- return;
- }
+ /**
+ * Check if the HMAC chain is not violated
+ */
+ void checkHMACChain(SlotIndexer *indexer, Array<Slot *> *newSlots);
- int64_t lastMessageSeqNum = lastMessageEntry.getFirst();
- Liveness lastEntry = lastMessageEntry.getSecond();
- // If it is not our machine Id since we already set ours to dead
- if (machineId != localMachineId) {
- if (lastEntry instanceof LastMessage) {
- ((LastMessage)lastEntry).setDead();
- } else if (lastEntry instanceof Slot) {
- ((Slot)lastEntry).setDead();
- } else {
- throw new Error("Unrecognized type");
- }
- }
+public:
+ Table(IoTString *baseurl, IoTString *password, int64_t _localMachineId, int listeningPort);
+ Table(CloudComm *_cloud, int64_t _localMachineId);
- // Make sure the server is not playing any games
- if (machineId == localMachineId) {
+ /**
+ * Initialize the table by inserting a table status as the first entry into the table status
+ * also initialize the crypto stuff.
+ */
+ void initTable();
- if (hadPartialSendToServer) {
- // We were not making any updates and we had a machine mismatch
- if (lastMessageSeqNum > seqNum && !acceptUpdatesToLocal) {
- throw new Error("Server Error: Mismatch on local machine sequence number, needed at least: " + lastMessageSeqNum + " got: " + seqNum);
- }
+ /**
+ * Rebuild the table from scratch by pulling the latest block chain from the server.
+ */
- } else {
- // We were not making any updates and we had a machine mismatch
- if (lastMessageSeqNum != seqNum && !acceptUpdatesToLocal) {
- throw new Error("Server Error: Mismatch on local machine sequence number, needed: " + lastMessageSeqNum + " got: " + seqNum);
- }
- }
- } else {
- if (lastMessageSeqNum > seqNum) {
- throw new Error("Server Error: Rollback on remote machine sequence number");
- }
- }
- }
+ void rebuild();
+ void addLocalCommunication(int64_t arbitrator, IoTString *hostName, int portNumber);
+ int64_t getArbitrator(IoTString *key);
+ void close();
+ IoTString *getCommitted(IoTString *key);
+ IoTString *getSpeculative(IoTString *key);
+ IoTString *getCommittedAtomic(IoTString *key);
+ IoTString *getSpeculativeAtomic(IoTString *key);
+ bool update();
+ bool createNewKey(IoTString *keyName, int64_t machineId);
+ void startTransaction();
+ void addKV(IoTString *key, IoTString *value);
+ TransactionStatus *commitTransaction();
/**
- * Add a rejected message entry to the watch set to keep track of which clients have seen that
- * rejected message entry and which have not.
+ * Get the machine ID for this client
*/
- private void addWatchList(int64_t machineId, RejectedMessage entry) {
- HashSet<RejectedMessage> entries = rejectedMessageWatchListTable.get(machineId);
- if (entries == NULL) {
- // There is no set for this machine ID yet so create one
- entries = new HashSet<RejectedMessage>();
- rejectedMessageWatchListTable.put(machineId, entries);
- }
- entries.add(entry);
- }
+ int64_t getMachineId() { return localMachineId; }
/**
- * Check if the HMAC chain is not violated
+ * Decrement the number of live slots that we currently have
*/
- private void checkHMACChain(SlotIndexer indexer, Slot[] newSlots) {
- for (int i = 0; i < newSlots.length; i++) {
- Slot currSlot = newSlots[i];
- Slot prevSlot = indexer.getSlot(currSlot.getSequenceNumber() - 1);
- if (prevSlot != NULL &&
- !Arrays.equals(prevSlot.getHMAC(), currSlot.getPrevHMAC()))
- throw new Error("Server Error: Invalid HMAC Chain" + currSlot + " " + prevSlot);
- }
- }
-}
+ void decrementLiveCount() { liveSlotCount--; }
+ int64_t getLocalSequenceNumber();
+ Array<char> *acceptDataFromLocal(Array<char> *data);
+};
+
+#endif
projects / iotcloud.git / blobdiff