all protocol classnames now have a VS prefix

1 files changed, 190 insertions, 0 deletions

diff --git a/sources/protocols/implementations/VSTwoPhaseCommitProtocol.java b/sources/protocols/implementations/VSTwoPhaseCommitProtocol.java
new file mode 100644
index 0000000..01a9be3
--- /dev/null
+++ b/sources/protocols/implementations/VSTwoPhaseCommitProtocol.java
@@ -0,0 +1,190 @@
+/*
+ * VS is (c) 2008 by Paul C. Buetow
+ * vs@dev.buetow.org
+ */
+package protocols.implementations;
+
+import java.util.ArrayList;
+import java.util.Vector;
+
+import protocols.VSAbstractProtocol;
+import core.VSMessage;
+
+/**
+ * The Class VSTwoPhaseCommitProtocol.
+ */
+public class VSTwoPhaseCommitProtocol extends VSAbstractProtocol {
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * Instantiates a one phase commit protocol.
+     */
+    public VSTwoPhaseCommitProtocol() {
+        super(VSAbstractProtocol.HAS_ON_SERVER_START);
+        setClassname(getClass().toString());
+    }
+
+    /** PIDs of all processes which still have to vote */
+    private ArrayList<Integer> votePids;
+
+    /** PIDs of all processes which have to acknowledge that they recv the global vote result */
+    private ArrayList<Integer> ackPids;
+
+    /** The gloal vote result */
+    private boolean voteResult;
+
+    /* (non-Javadoc)
+     * @see events.VSAbstractProtocol#onServerInit()
+     */
+    public void onServerInit() {
+        Vector<Integer> vec = new Vector<Integer>();
+        vec.add(2);
+        vec.add(3);
+
+        initVector("pids", vec, "PIDs beteilitger Prozesse");
+        initLong("timeout", 2500, "Zeit bis erneuerter Anfrage", "ms");
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onServerReset()
+     */
+    public void onServerReset() {
+        if (votePids != null) {
+            voteResult = true;
+            votePids.clear();
+            votePids.addAll(getVector("pids"));
+            ackPids.clear();
+            ackPids.addAll(getVector("pids"));
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onServerStart()
+     */
+    public void onServerStart() {
+        if (votePids == null) {
+            voteResult = true;
+            votePids = new ArrayList<Integer>();
+            votePids.addAll(getVector("pids"));
+            ackPids = new ArrayList<Integer>();
+            ackPids.addAll(getVector("pids"));
+        }
+
+        if (votePids.size() != 0) {
+            long timeout = getLong("timeout") + process.getTime();
+            scheduleAt(timeout); /* Will run onServerSchedule() at the specified local time */
+
+            VSMessage message = new VSMessage();
+            message.setBoolean("wantVote", true);
+            sendMessage(message);
+
+        } else if (ackPids.size() != 0) {
+            long timeout = getLong("timeout") + process.getTime();
+            scheduleAt(timeout); /* Will run onServerSchedule() at the specified local time */
+
+            VSMessage message = new VSMessage();
+            message.setBoolean("isVoteResult", true);
+            message.setBoolean("voteResult", voteResult);
+            sendMessage(message);
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onServerRecv(core.VSMessage)
+     */
+    public void onServerRecv(VSMessage recvMessage) {
+        if (votePids.size() != 0 && recvMessage.getBoolean("isVote")) {
+            Integer pid = recvMessage.getIntegerObj("pid");
+            if (votePids.contains(pid))
+                votePids.remove(pid);
+            else
+                return;
+
+            boolean vote = recvMessage.getBoolean("vote");
+            logg("Abstimmung von Prozess " + pid + " erhalten! Ergebnis: " + vote);
+
+            if (!vote)
+                voteResult = false;
+
+            if (votePids.size() == 0) {
+                logg("Abstimmungen von allen beteiligten Prozessen erhalten! Globales Ergebnis: " + voteResult);
+                /* Remove the active schedule which has been created in the onServerStart method */
+                removeSchedules();
+                /* Create a new schedule and send the vote result */
+                onServerStart();
+            }
+        } else if (ackPids.size() != 0 && recvMessage.getBoolean("isAck")) {
+            Integer pid = recvMessage.getIntegerObj("pid");
+            if (ackPids.contains(pid))
+                ackPids.remove(pid);
+            else
+                return;
+
+            if (ackPids.size() == 0) {
+                /* Remove the active schedule which has been created in the onServerStart method */
+                removeSchedules();
+                logg("Alle Teilnehmer haben die Abstimmung erhalten");
+            }
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onServerSchedule()
+     */
+    public void onServerSchedule() {
+        onServerStart();
+    }
+
+    /* Server variables */
+    private boolean voteSent;
+    private boolean myVote;
+
+    /* (non-Javadoc)
+     * @see events.VSAbstractProtocol#onClientInit()
+     */
+    public void onClientInit() {
+        initInteger("ackProb", 50, "Festschreibw'keit", 0, 100, "%");
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onClientReset()
+     */
+    public void onClientReset() {
+        voteSent = false;
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onClientRecv(core.VSMessage)
+     */
+    public void onClientRecv(VSMessage recvMessage) {
+        if (recvMessage.getBoolean("wantVote")) {
+            if (!voteSent) {
+                voteSent = true;
+                myVote = process.getRandomPercentage() <= getInteger("ackProb");
+            }
+
+            VSMessage message = new VSMessage();
+            message.setBoolean("isVote", true);
+            message.setBoolean("vote", myVote);
+            message.setInteger("pid", process.getProcessID());
+            sendMessage(message);
+
+            logg("Abstimmung " + myVote + " versendet");
+
+        } else if (recvMessage.getBoolean("isVoteResult")) {
+            boolean voteResult = recvMessage.getBoolean("voteResult");
+            logg("Globales Abstimmungsergebnis erhalten. Ergebnis: " + voteResult);
+
+            VSMessage message = new VSMessage();
+            message.setBoolean("isAck", true);
+            message.setInteger("pid", process.getProcessID());
+            sendMessage(message);
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onClientSchedule()
+     */
+    public void onClientSchedule() {
+    }
+}