diff options
| author | Rajith Muditha Attapattu <rajith@apache.org> | 2011-05-27 15:44:23 +0000 |
|---|---|---|
| committer | Rajith Muditha Attapattu <rajith@apache.org> | 2011-05-27 15:44:23 +0000 |
| commit | 66765100f4257159622cefe57bed50125a5ad017 (patch) | |
| tree | a88ee23bb194eb91f0ebb2d9b23ff423e3ea8e37 /qpid/dotnet/Qpid.Integration.Tests/framework/clocksynch/ClockSynchThread.csx | |
| parent | 1aeaa7b16e5ce54f10c901d75c4d40f9f88b9db6 (diff) | |
| parent | 88b98b2f4152ef59a671fad55a0d08338b6b78ca (diff) | |
| download | qpid-python-rajith_jms_client.tar.gz | |
Creating a branch for experimenting with some ideas for JMS client.rajith_jms_client
git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/rajith_jms_client@1128369 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'qpid/dotnet/Qpid.Integration.Tests/framework/clocksynch/ClockSynchThread.csx')
| -rw-r--r-- | qpid/dotnet/Qpid.Integration.Tests/framework/clocksynch/ClockSynchThread.csx | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/qpid/dotnet/Qpid.Integration.Tests/framework/clocksynch/ClockSynchThread.csx b/qpid/dotnet/Qpid.Integration.Tests/framework/clocksynch/ClockSynchThread.csx new file mode 100644 index 0000000000..7d2fcae058 --- /dev/null +++ b/qpid/dotnet/Qpid.Integration.Tests/framework/clocksynch/ClockSynchThread.csx @@ -0,0 +1,117 @@ +/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+using log4net;
+
+using uk.co.thebadgerset.junit.extensions.ShutdownHookable;
+using uk.co.thebadgerset.junit.extensions.Throttle;
+
+namespace Apache.Qpid.Integration.Tests.framework.clocksynch
+{
+ /// <summary>
+ /// ClockSynchThread is a convenient utility for running a thread that periodically synchronizes the clock against
+ /// a reference. Supply it with a <see cref="ClockSynchronizer"/> and a <see cref="Throttle"/> and it will continually keep the
+ /// clock up-to-date at a rate determined by the throttle.
+ ///
+ /// <p/><table id="crc"><caption>CRC Card</caption>
+ /// <tr><th> Responsibilities <th> Collaborations
+ /// <tr><td> Continually sychronize the clock at a throttled rate.
+ /// </table>
+ /// </summary>
+ public class ClockSynchThread extends Thread : ShutdownHookable
+ {
+ /// <summary> Used for debugging. </summary>
+ private static ILog log = LogManager.GetLogger(typeof(ClockSynchThread));
+
+ /// <summary> Holds the clock syncher for the synch thread. </summary>
+ private ClockSynchronizer clockSyncher;
+
+ /// <summary> Holds the throttle to limit the synch rate. </summary>
+ private Throttle throttle;
+
+ /// <summary> Flag to indicate that the periodic clock syncher should keep running. </summary>
+ bool doSynch = true;
+
+ /// <summary>
+ /// Creates a clock synchronizer thread from a clock synchronizer and a throttle.
+ /// </summary>
+ /// <param name="syncher"> The clock synchronizer. </param>
+ /// <param name="throttle"> The throttle. </param>
+ public ClockSynchThread(ClockSynchronizer syncher, Throttle throttle)
+ {
+ this.clockSyncher = syncher;
+ this.throttle = throttle;
+ }
+
+ /// <summary> Terminates the synchronization thread. </summary>
+ public void terminate()
+ {
+ doSynch = false;
+ }
+
+ /// <summary> Continually updates the clock, until <see cref="#terminate()"/> is called. </summary>
+ public void run()
+ {
+ while (doSynch)
+ {
+ // Perform a clock clockSynch.
+ try
+ {
+ // Wait controlled by the throttle before doing the next synch.
+ throttle.throttle();
+
+ clockSyncher.synch();
+ log.debug("Clock synched, delta = " + clockSyncher.getDelta() + ", epsilon = " + clockSyncher.getEpsilon()
+ + ".");
+ }
+ // Terminate the synch thread if the synchronization cannot be achieved.
+ catch (ClockSynchFailureException e)
+ {
+ log.debug("Cannot synchronize the clock (reference service may be down). Terminating the synch thread.");
+ doSynch = false;
+ }
+ }
+ }
+
+ /// <summary>
+ /// Gets the clock synchronizer that is kept continually up to date.
+ /// </summary>
+ /// <return> The clock synchronizer that is kept continually up to date. </return>
+ public ClockSynchronizer getClockSyncher()
+ {
+ return clockSyncher;
+ }
+
+ /// <summary>
+ /// Supplies a shutdown hook, that terminates the synching thread.
+ /// </summary>
+ /// <return> The shut down hook. </return>
+ public Thread getShutdownHook()
+ {
+ return new Thread(new Runnable()
+ {
+ public void run()
+ {
+ doSynch = false;
+ }
+ });
+ }
+ }
+}
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