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authorPaul Buetow <paul@buetow.org>2008-05-17 15:55:43 +0000
committerPaul Buetow <paul@buetow.org>2008-05-17 15:55:43 +0000
commit30ac208bac5acb677b2359a3f21f028b5b10a2b3 (patch)
tree1683f593e92fddf99303726d505e5d4d77bc5c4b /sources/protocols/BerkelyTimeProtocol.java
parent269558d30023525012a3b0633b030fa2e9151e29 (diff)
renamed the package.
Diffstat (limited to 'sources/protocols/BerkelyTimeProtocol.java')
-rw-r--r--sources/protocols/BerkelyTimeProtocol.java126
1 files changed, 0 insertions, 126 deletions
diff --git a/sources/protocols/BerkelyTimeProtocol.java b/sources/protocols/BerkelyTimeProtocol.java
deleted file mode 100644
index 2e1166e..0000000
--- a/sources/protocols/BerkelyTimeProtocol.java
+++ /dev/null
@@ -1,126 +0,0 @@
-package protocols;
-
-import prefs.VSPrefs;
-import core.VSMessage;
-
-import java.util.HashMap;
-
-public class BerkelyTimeProtocol extends VSProtocol {
- /* Berkely Server variables */
-
- /* Integer: Process ID, Long: Local time of the process */
- private HashMap<Integer,Long> processTimes = new HashMap<Integer,Long>();
- /* Integer: Process ID, Long: Time of receiving the response from the process */
- private HashMap<Integer,Long> recvTimes = new HashMap<Integer,Long>();
- /* Integer: Process ID, Long: Calculated process times (using the RTT) */
- private HashMap<Integer,Long> realTimesRTT = new HashMap<Integer,Long>();
- /* Time the request/response has started */
- private long requestTime;
-
- /* Berkely Client vairables */
-
- protected void onInit() {
- setProtocolClassname(getClass().toString());
-
- /* Those prefs are editable through the VSProtocol VSEditor GUI. t_min and t_max in milliseconds */
- setInteger("numProcesses", getNumProcesses()-1);
- }
-
- protected void onClientReset() {
- processTimes.clear();
- recvTimes.clear();
- realTimesRTT.clear();
- }
-
- protected void onClientStart() {
- requestTime = process.getTime();
- VSMessage message = new VSMessage(getProtocolClassname());
- message.setBoolean("isRequest", true);
- sendMessage(message);
- }
-
- protected void onClientRecv(VSMessage recvMessage) {
- /* Ignore all protocol messages which are not a response message, e.g. itself */
- if (!recvMessage.getBoolean("isResponse"))
- return;
-
- Integer processID = new Integer(recvMessage.getInteger("processID"));
- Long time = new Long(recvMessage.getLong("time"));
-
- processTimes.put(processID, time);
- recvTimes.put(processID, new Long(process.getTime()));
-
- /* All processes have comitted the response */
- if (processTimes.size() == getInteger("numProcesses")) {
- long avgTime = calculateAverageTime();
- /* Set the local's process time to the new avg reference time */
- process.setTime(avgTime);
- /* Tell all other processes what to do in order to justify their times */
- sendJustifyRequests(avgTime);
- /* Start "clean" next time */
- onClientReset();
- }
- }
-
- /**
- * Calculate the new average time
- */
- private long calculateAverageTime() {
- long sum = 0;
- for (Integer processID : processTimes.keySet()) {
- Long localTime = processTimes.get(processID);
- Long recvTime = recvTimes.get(processID);
- long rtt = recvTime.longValue() - requestTime;
- long realProcessTime = localTime + (long) (rtt / 2);
- realTimesRTT.put(processID, new Long(realProcessTime));
- sum += realProcessTime;
- }
- /* Include the time of the local process */
- sum += process.getTime();
- return (long) sum / (1 + getInteger("numProcesses"));
- }
-
- /**
- * Sends to all clients a value to justify their local clocks
- */
- private void sendJustifyRequests(long avgTime) {
- for (Integer processID : processTimes.keySet()) {
- long realProcessTime = realTimesRTT.get(processID).longValue();
- long diff = avgTime - realProcessTime;
- VSMessage message = new VSMessage(getProtocolClassname());
- message.setBoolean("isJustify", true);
- message.setLong("timeDiff", diff);
- message.setInteger("receiverProcessID", processID);
- sendMessage(message);
- }
- }
-
- protected void onServerReset() {
- }
-
- protected void onServerRecv(VSMessage recvMessage) {
- if (recvMessage.getBoolean("isRequest")) {
- VSMessage message = new VSMessage(getProtocolClassname());
- message.setInteger("processID", process.getProcessID());
- message.setLong("time", process.getTime());
- message.setBoolean("isResponse", true);
- sendMessage(message);
-
- } else if (recvMessage.getBoolean("isJustify")) {
- /* Check if it's "my" justify message */
- if (recvMessage.getInteger("receiverProcessID") != process.getProcessID())
- return;
-
- long timeDiff = recvMessage.getLong("timeDiff");
- long recvTime = process.getTime();
- long newTime = process.getTime() + timeDiff;
- logg("Neue Zeit: " + newTime);
-
- process.setTime(newTime);
- }
- }
-
- public String toString() {
- return super.toString();
- }
-}