1 files changed, 125 insertions, 0 deletions
diff --git a/sources/protocols/implementations/VSInternalTimeSyncProtocol.java b/sources/protocols/implementations/VSInternalTimeSyncProtocol.java
new file mode 100644
index 0000000..9a7b0fe
--- /dev/null
+++ b/sources/protocols/implementations/VSInternalTimeSyncProtocol.java
@@ -0,0 +1,125 @@
+/*
+ * VS is (c) 2008 by Paul C. Buetow
+ * vs@dev.buetow.org
+ */
+package protocols.implementations;
+
+import core.VSMessage;
+import protocols.VSAbstractProtocol;
+
+// TODO: Auto-generated Javadoc
+/**
+ * The Class VSInternalTimeSyncProtocol.
+ */
+public class VSInternalTimeSyncProtocol extends VSAbstractProtocol {
+    private static final long serialVersionUID = 1L;
+
+    /** The waiting for response. */
+    private boolean waitingForResponse;
+
+    /**
+     * Instantiates a new internal time sync protocol.
+     */
+    public VSInternalTimeSyncProtocol() {
+        super(VSAbstractProtocol.HAS_ON_CLIENT_START);
+        setClassname(getClass().toString());
+    }
+
+    /* (non-Javadoc)
+     * @see events.VSAbstractProtocol#onClientInit()
+     */
+    public void onClientInit() {
+        /* Those prefs are editable through the VSAbstractProtocol VSAbstractEditor GUI. t_min and t_max in milliseconds  */
+        initLong("t_min", 2000, "Max. Übetragungszeit", "ms");
+        initLong("t_max", 500, "Min. Übertragungszeit", "ms");
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onClientReset()
+     */
+    public void onClientReset() {
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onClientStart()
+     */
+    public void onClientStart() {
+        waitingForResponse = true;
+
+        /* Multicast message to all processes */
+        VSMessage message = new VSMessage();
+        message.setBoolean("isClientRequest", true);
+        sendMessage(message);
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onClientRecv(core.VSMessage)
+     */
+    public void onClientRecv(VSMessage recvMessage) {
+        /* Ignore all protocol messages which are not a response message, e.g. itself */
+        if (!recvMessage.getBoolean("isServerResponse"))
+            return;
+
+        if (waitingForResponse)
+            waitingForResponse = false;
+        else
+            return;
+
+        long tMax = getLong("t_max");
+        long tMin = getLong("t_min");
+        long serverTime = recvMessage.getLong("time");
+        long newTime = serverTime + (long) ((tMax + tMin) / 2 );
+
+        logg("Server Zeit: " + serverTime + "; (t_min,t_max): (" + tMin + "," + tMax
+             + "); Alte Zeit: " + process.getTime() + "; Neue Zeit: " + newTime
+             + "; Offset: " + (process.getTime() - newTime));
+
+        process.setTime(newTime);
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onClientSchedule()
+     */
+    public void onClientSchedule() {
+    }
+
+    /* (non-Javadoc)
+     * @see events.VSAbstractProtocol#onServerInit()
+     */
+    public void onServerInit() {
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onServerReset()
+     */
+    public void onServerReset() {
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onServerRecv(core.VSMessage)
+     */
+    public void onServerRecv(VSMessage recvMessage) {
+        /* Ignore all protocol messages which are not a request message, e.g. itself */
+        if (!recvMessage.getBoolean("isClientRequest"))
+            return;
+
+        /* Multicast message to all processes */
+        VSMessage message = new VSMessage();
+        message.setLong("time", process.getTime());
+        message.setBoolean("isServerResponse", true);
+        sendMessage(message);
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#onServerSchedule()
+     */
+    public void onServerSchedule() {
+    }
+
+    /* (non-Javadoc)
+     * @see protocols.VSAbstractProtocol#toString()
+     */
+    public String toString() {
+        return super.toString();
+    }
+}