Block Chain Transactions, Commits multiple parts version

[iotcloud.git] / version2 / backup / src / java / iotcloud / LastMessage.java

diff --git a/version2/backup/src/java/iotcloud/LastMessage.java b/version2/backup/src/java/iotcloud/LastMessage.java
new file mode 100644 (file)
index 0000000..738dff6
--- /dev/null
+++ b/version2/backup/src/java/iotcloud/LastMessage.java
@@ -0,0 +1,55 @@
+package iotcloud;
+
+import java.nio.ByteBuffer;
+
+/**
+ * This Entry records the last message sent by a given machine.
+ * @author Brian Demsky <bdemsky@uci.edu>
+ * @version 1.0
+ */
+
+
+class LastMessage extends Entry {
+       private long machineid;
+       private long seqnum;
+
+       public LastMessage(Slot slot, long _machineid, long _seqnum) {
+               super(slot);
+               machineid=_machineid;
+               seqnum=_seqnum;
+       }
+
+       public long getMachineID() {
+               return machineid;
+       }
+
+       public long getSequenceNumber() {
+               return seqnum;
+       }
+
+       static Entry decode(Slot slot, ByteBuffer bb) {
+               long machineid=bb.getLong();
+               long seqnum=bb.getLong();
+               return new LastMessage(slot, machineid, seqnum);
+       }
+
+       public void encode(ByteBuffer bb) {
+               bb.put(Entry.TypeLastMessage);
+               bb.putLong(machineid);
+               bb.putLong(seqnum);
+       }
+
+       public int getSize() {
+               return 2*Long.BYTES+Byte.BYTES;
+       }
+
+       public byte getType() {
+               return Entry.TypeLastMessage;
+       }
+
+       public Entry getCopy(Slot s) {
+               return new LastMessage(s, machineid, seqnum);
+       }
+}
+
+