1 package iotruntime.master;
3 import java.util.ArrayList;
4 import java.util.HashMap;
5 import java.util.HashSet;
8 import java.util.Random;
11 /** Class CommunicationHandler is a class that maintains
12 * a data structure that preserves a collection of host name,
13 * port numbers, and objects that are running
14 * +-----------------+----+--------+------------------+--------------+----------------+
15 * | HOST-ADDRESS | ...|IN-PORT | RMIREGISTRY-PORT | RMISTUB-PORT | ACTIVE OBJECTS |
16 * +-----------------+----+--------+------------------+--------------+----------------+
17 * | XXX.XXX.XXX.XXX | | XXXXX | XXXXX | XXXXX | XXXXXXXXXXXXXX |
18 * | | | XXXXX | XXXXX | XXXXX | XXXXXXXXXXXXXX |
19 * | | | XXXXX | XXXXX | XXXXX | XXXXXXXXXXXXXX |
20 * | | ...| ... | ... | ... | ... |
21 * +-----------------+----+--------+------------------+--------------+----------------+
22 * In this case we use ACTIVE OBJECTS names as the key
23 * So ACTIVE OBJECTS maps to numbers and these numbers map to each other
24 * entry in hashmaps (HostAddress can be repetitive)
25 * e.g. ACTIVE OBJECTS ProximitySensorPS0 - 0
26 * ProximitySensorPS1 - 1
29 * IN-PORT / RMIREGISTRY-PORT / RMISTUB-PORT / HOST-ADDRESS: 0 - XXXXX
40 * We add a Set structure to handle all the other ports that are used by devices
41 * when communicating with their respective drivers
43 * @author Rahmadi Trimananda <rahmadi.trimananda @ uci.edu>
47 public final class CommunicationHandler {
50 * CommunicationHandler class properties
52 * Random, host name, port number, active objects
53 * HostAdd is the key to the table so we use it
54 * as a key to elements
55 * HostList gives a mapping from hostname to list of objects
57 private Random random;
58 private List<String> listActiveControllerObj;
59 private List<String> listFieldObjectID;
60 private List<ObjectCreationInfo> listObjCrtInfo;
61 private List<Object[]> listArrFieldValues;
62 private List<Class[]> listArrFieldClasses;
63 private Map<String, Integer> hmActiveObj;
64 private Map<Integer, String> hmHostAdd;
65 private Map<String, ArrayList<String> > hmHostList;
66 private Map<Integer, Integer> hmComPort;
67 private Map<Integer, Integer> hmRMIRegPort;
68 private Map<Integer, Integer> hmRMIStubPort;
69 private Set<Integer> hsDevicePort;
70 private Set<Integer> hsCallbackPort;
71 private Map<Integer, Integer[]> hmCallbackPort;
72 private int iNumOfObjects;
73 private int iNumOfHosts;
74 private boolean bVerbose;
77 * CommunicationHandler class constants
79 private final int INT_MAX_PORT = 65535;
80 private final int INT_MIN_PORT = 10000;
85 public CommunicationHandler(boolean _bVerbose) {
87 random = new Random();
88 listActiveControllerObj = new ArrayList<String>();
89 listFieldObjectID = new ArrayList<String>();
90 listObjCrtInfo = new ArrayList<ObjectCreationInfo>();
91 listArrFieldValues = new ArrayList<Object[]>();
92 listArrFieldClasses = new ArrayList<Class[]>();
93 hmActiveObj = new HashMap<String, Integer>();
94 hmHostAdd = new HashMap<Integer, String>();
95 hmHostList = new HashMap<String, ArrayList<String>>();
96 hmComPort = new HashMap<Integer, Integer>();
97 hmRMIRegPort = new HashMap<Integer, Integer>();
98 hmRMIStubPort = new HashMap<Integer, Integer>();
99 hsDevicePort = new HashSet<Integer>();
100 hsCallbackPort = new HashSet<Integer>();
101 hmCallbackPort = new HashMap<Integer, Integer[]>();
104 bVerbose = _bVerbose;
105 RuntimeOutput.print("CommunicationHandler: Creating a new CommunicationHandler object!", bVerbose);
109 * Method addPortConnection()
111 * Add a new connection then generate new in-port and out-port numbers
113 * @param sHAddress String host address
114 * @param sAObject String active object name
117 public void addPortConnection(String sHAddress, String sAObject) {
119 // Increment counter first before we add objects as we start from 0
120 // Objects are named uniquely so we record this and match with the host
121 // Hostname occurrence can be repetitive as there can be more than
122 // one host on one compute node
124 // Add a new object in the list of objects
125 hmActiveObj.put(sAObject, iNumOfObjects);
127 // Check host existence in our data structure
128 // Add a new host and a new object
129 if(hmHostList.containsKey(sHAddress) == false) {
131 hmHostList.put(sHAddress, new ArrayList<String>());
133 hmHostList.get(sHAddress).add(sAObject);
135 // Map object to host
136 hmHostAdd.put(iNumOfObjects, sHAddress);
140 iComPort = random.nextInt(INT_MAX_PORT - INT_MIN_PORT + 1) + INT_MIN_PORT;
141 // Check port existence in HashMap
142 } while (portIsAvailable(iComPort) == false);
143 hmComPort.put(iNumOfObjects, iComPort);
147 iRMIRegPort = random.nextInt(INT_MAX_PORT - INT_MIN_PORT + 1) + INT_MIN_PORT;
148 // Check port existence in HashMap
149 } while (portIsAvailable(iRMIRegPort) == false);
150 hmRMIRegPort.put(iNumOfObjects, iRMIRegPort);
152 int iRMIStubPort = 0;
154 iRMIStubPort = random.nextInt(INT_MAX_PORT - INT_MIN_PORT + 1) + INT_MIN_PORT;
155 // Check port existence in HashMap
156 } while (portIsAvailable(iRMIStubPort) == false);
157 hmRMIStubPort.put(iNumOfObjects, iRMIStubPort);
163 * A private method to add a new active controller object
165 * @params strFieldObjectID String field object ID
166 * @params strObjName String object name
167 * @params strObjClassName String object class name
168 * @params strObjClassInterfaceName String object class interface name
169 * @params strIoTSlaveObjectHostAdd String IoTSlave host address
170 * @params arrFieldValues Array of field values
171 * @params arrFieldClasses Array of field classes
174 public void addActiveControllerObject(String strFieldObjectID, String strObjName, String strObjClassName,
175 String strObjClassInterfaceName, String strObjStubClsIntfaceName, String strIoTSlaveObjectHostAdd, Object[] arrFieldValues,
176 Class[] arrFieldClasses) {
178 listActiveControllerObj.add(strObjName);
179 listFieldObjectID.add(strFieldObjectID);
180 listArrFieldValues.add(arrFieldValues);
181 listArrFieldClasses.add(arrFieldClasses);
182 ObjectCreationInfo objCrtInfo = new ObjectCreationInfo(strIoTSlaveObjectHostAdd, strObjName,
183 strObjClassName, strObjClassInterfaceName, strObjStubClsIntfaceName);
184 listObjCrtInfo.add(objCrtInfo);
189 * Method getCallbackPort()
191 * Get a new port for new connections for callback objects in the program.
192 * This newly generated port number will be recorded.
194 * @return int[] A set of callback ports
196 public int[] getCallbackPorts(int numOfPorts) {
198 int[] ports = new int[numOfPorts];
200 for(int i = 0; i < numOfPorts; i++) {
202 ports[i] = random.nextInt(INT_MAX_PORT - INT_MIN_PORT + 1) + INT_MIN_PORT;
203 // Check port existence in HashMap
204 } while (portIsAvailable(ports[i]) == false);
205 hsCallbackPort.add(ports[i]);
213 * Method getCallbackPorts()
215 * Get a set of new ports for new connections for callback objects in the program.
216 * This newly generated port number will be recorded.
218 * @return int[] A set of callback ports
220 public Integer[] getCallbackPorts(String sAObject, int numOfPorts) {
222 Integer[] ports = new Integer[numOfPorts];
223 int iNumOfObject = hmActiveObj.get(sAObject);
225 if (!hmCallbackPort.containsKey(iNumOfObject)) {
226 for(int i = 0; i < numOfPorts; i++) {
228 ports[i] = random.nextInt(INT_MAX_PORT - INT_MIN_PORT + 1) + INT_MIN_PORT;
229 // Check port existence in HashMap
230 } while (portIsAvailable(ports[i]) == false);
231 hsCallbackPort.add(ports[i]);
233 hmCallbackPort.put(iNumOfObject, ports);
235 ports = hmCallbackPort.get(iNumOfObject);
243 * Method addDevicePort()
245 * Add a port that is used by a device when communicating with its driver
246 * This port will be taken into account when checking for port availability
248 * @param iDevPort Device port number
251 public void addDevicePort(int iDevPort) {
253 hsDevicePort.add(iDevPort);
258 * Method portIsAvailable()
260 * Checks the availability of the newly generated port.
261 * If port number has been used in any of the lists then
262 * it is not available
264 * @param iPortNumber Device port number
267 public boolean portIsAvailable(int iPortNumber) {
269 if (hmComPort.containsValue(iPortNumber) == true) {
271 } else if (hmRMIRegPort.containsValue(iPortNumber) == true) {
273 } else if (hmRMIStubPort.containsValue(iPortNumber) == true) {
275 } else if (hsDevicePort.contains(iPortNumber) == true) {
277 } else if (hsCallbackPort.contains(iPortNumber) == true) {
285 * Method getNumOfObjects()
289 public int getNumOfObjects() {
291 return iNumOfObjects;
296 * Method getNumOfHosts()
300 public int getNumOfHosts() {
307 * Method objectExists()
309 * @param sObjName String object name
312 public boolean objectExists(String sObjName) {
314 return hmActiveObj.containsKey(sObjName);
319 * Method hostExists()
321 * @param sHostName String host name
324 public boolean hostExists(String sHostName) {
326 return hmHostList.containsKey(sHostName);
331 * Method getHostAddress()
333 * User finds HostAddress using Object name
335 * @param sAObject String active object name
338 public String getHostAddress(String sAObject) {
340 return hmHostAdd.get(hmActiveObj.get(sAObject));
347 * User gets the set of hostnames
351 public Set<String> getHosts() {
353 return hmHostList.keySet();
358 * Method getComPort()
360 * User finds In-Port number using Object name
362 * @param sAObject String active object name
365 public Integer getComPort(String sAObject) {
367 return hmComPort.get(hmActiveObj.get(sAObject));
371 * Method getRMIRegPort()
373 * User finds Out-Port number using Object name
375 * @param sAObject String active object name
378 public Integer getRMIRegPort(String sAObject) {
380 return hmRMIRegPort.get(hmActiveObj.get(sAObject));
385 * Method getRMIStubPort()
387 * User finds Out-Port number using Object name
389 * @param sAObject String active object name
392 public Integer getRMIStubPort(String sAObject) {
394 return hmRMIStubPort.get(hmActiveObj.get(sAObject));
399 * Method getFieldObjectID()
401 * User finds field object ID using Object name
403 * @param sAObject String active object name
406 public String getFieldObjectID(String sAObject) {
408 return listFieldObjectID.get(listActiveControllerObj.indexOf(sAObject));
413 * Method getObjectCreationInfo()
415 * User finds ObjectCreationInfo using Object name
417 * @param sAObject String active object name
418 * @return ObjectCreationInfo
420 public ObjectCreationInfo getObjectCreationInfo(String sAObject) {
422 return listObjCrtInfo.get(listActiveControllerObj.indexOf(sAObject));
427 * Method getArrayFieldClasses()
429 * User finds array of field classes using Object name
431 * @param sAObject String active object name
434 public Class[] getArrayFieldClasses(String sAObject) {
436 return listArrFieldClasses.get(listActiveControllerObj.indexOf(sAObject));
441 * Method getArrayFieldValues()
443 * User finds array of field values using Object name
445 * @param sAObject String active object name
448 public Object[] getArrayFieldValues(String sAObject) {
450 return listArrFieldValues.get(listActiveControllerObj.indexOf(sAObject));
455 * Method getActiveControllerObjectList()
457 * @return List<String>
459 public List<String> getActiveControllerObjectList() {
461 return listActiveControllerObj;
466 * Method printLists()
470 public void printLists() {
472 // Iterate on HostAddress
473 for(String s : hmHostList.keySet()) {
475 for(String str : hmHostList.get(s)) {
477 int iIndex = hmActiveObj.get(str);
478 RuntimeOutput.print("Active Object: " + str, bVerbose);
479 RuntimeOutput.print("Communication Port: " + hmComPort.get(iIndex), bVerbose);
480 RuntimeOutput.print("RMI Registry Port: " + hmRMIRegPort.get(iIndex), bVerbose);
481 RuntimeOutput.print("RMI Stub Port: " + hmRMIStubPort.get(iIndex), bVerbose);
485 for(int iPort : hsDevicePort) {
487 RuntimeOutput.print("Device Port: " + iPort, bVerbose);