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Merged V3.1 to HEAD

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13107: Remove accidentally added .project file.
   13106: Correction to 13104 - remove accidentally included merge marks
   13105: Correction to 13104 - remove accidentally included merge marks
   13104: Update continuous build to include Hyperic plugin amongst distributables
   13092: Fix ConnectionPoolMBean. Naming of boolean methods didn't match those on DBCP BasicDataSource
   13088: Bring hyperic plugin in sync with Derek's recent JMX changes
   13076: Extended properties available on ConnectionPoolMBean
   13045: Merged V3.0 to v3.1 (record only)
      13044: Merged V2.2 to V3.0
         13041: Merged V3.1 to V2.2
            13037: PostgreSQL upgrade scripts from 2.1.6, 2.2.0, and 2.2.1


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@13522 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Dave Ward
2009-03-10 13:51:31 +00:00
parent 7b66781036
commit bc91efa1e0
1 changed files with 198 additions and 185 deletions
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383
source/java/org/alfresco/repo/cache/jgroups/JGroupsKeepAliveHeartbeatReceiver.java vendored
View File

@@ -24,194 +24,207 @@
*/
package org.alfresco.repo.cache.jgroups;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.alfresco.util.EqualsHelper;
import org.alfresco.util.TraceableThreadFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jgroups.Address;
import org.jgroups.Channel;
import org.jgroups.Message;
import org.jgroups.ReceiverAdapter;
import org.jgroups.View;
import net.sf.ehcache.distribution.MulticastKeepaliveHeartbeatSender;
/**
* Receives heartbeats from the {@link JGroupsKeepAliveHeartbeatSender JGroups heartbeat sender}.
* Receives heartbeats from any {@link MulticastKeepaliveHeartbeatSender}s out there.
* <p/>
* Our own multicast heartbeats are ignored.
*
* @author Derek Hulley
* @since 2.1.3
* @author Greg Luck
* @version $Id: MulticastKeepaliveHeartbeatReceiver.java 556 2007-10-29 02:06:30Z gregluck $
*/
public class JGroupsKeepAliveHeartbeatReceiver extends ReceiverAdapter
public abstract class JGroupsKeepaliveHeartbeatReceiver
{
private static final int MAX_THREADS = 5;
private static Log logger = LogFactory.getLog(JGroupsKeepAliveHeartbeatReceiver.class);
private final JGroupsRMICacheManagerPeerProvider peerProvider;
private final JGroupsKeepAliveHeartbeatSender heartbeatSender;
private final Channel channel;
private boolean stopped;
private View lastView;
private final ThreadPoolExecutor threadPool;
private final Set<String> rmiUrlsProcessingQueue;
public JGroupsKeepAliveHeartbeatReceiver(
JGroupsRMICacheManagerPeerProvider peerProvider,
JGroupsKeepAliveHeartbeatSender heartbeatSender,
Channel channel)
{
this.peerProvider = peerProvider;
this.heartbeatSender = heartbeatSender;
this.channel = channel;
this.rmiUrlsProcessingQueue = Collections.synchronizedSet(new HashSet<String>());
// Build the thread pool
TraceableThreadFactory threadFactory = new TraceableThreadFactory();
threadFactory.setThreadDaemon(true);
threadFactory.setThreadPriority(Thread.NORM_PRIORITY + 2);
this.threadPool = new ThreadPoolExecutor(
1, // Maintain one threads
1, // We'll increase it, if necessary
60, // 1 minute until unused threads get trashed
TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(),
threadFactory);
}
/**
* Register to receive message on the channel
*/
public void init()
{
channel.setReceiver(this);
}
/**
* Set the stop flag.
*/
public void dispose()
{
stopped = true;
}
@Override
public byte[] getState()
{
return new byte[] {};
}
@Override
public void setState(byte[] state)
{
// Nothing to do
}
@Override
public void receive(Message message)
{
Address localAddress = heartbeatSender.getHeartbeatSourceAddress();
Address remoteAddress = message.getSrc();
// Ignore messages from ourselves
if (EqualsHelper.nullSafeEquals(localAddress, remoteAddress))
{
if (logger.isDebugEnabled())
{
logger.debug("\n" +
"Ignoring cache peeer URLs heartbeat from self: " + message);
}
return;
}
String rmiUrls = new String(message.getBuffer());
if (logger.isDebugEnabled())
{
logger.debug("\n" +
"Received cache peer URLs heartbeat: \n" +
" Message: " + message + "\n" +
" Peers: " + rmiUrls);
}
// Quickly split them up
StringTokenizer tokenizer = new StringTokenizer(rmiUrls, JGroupsKeepAliveHeartbeatSender.URL_DELIMITER, false);
while (!stopped && tokenizer.hasMoreTokens())
{
String rmiUrl = tokenizer.nextToken();
// Is it pending?
if (rmiUrlsProcessingQueue.add(rmiUrl))
{
// Not pending. Shedule it.
ProcessingRunnable runnable = new ProcessingRunnable(rmiUrl);
threadPool.execute(runnable);
}
else
{
// It was already waiting to be processed
// Increase the thread pool size
int currentThreadPoolMaxSize = threadPool.getMaximumPoolSize();
if (currentThreadPoolMaxSize < MAX_THREADS)
{
threadPool.setMaximumPoolSize(currentThreadPoolMaxSize + 1);
}
}
}
}
/**
* Worker class to go into thread pool
*
* @author Derek Hulley
*/
private class ProcessingRunnable implements Runnable
{
private String rmiUrl;
private ProcessingRunnable(String rmiUrl)
{
this.rmiUrl = rmiUrl;
}
public void run()
{
rmiUrlsProcessingQueue.remove(rmiUrl);
if (stopped)
{
return;
}
peerProvider.registerPeer(rmiUrl);
}
}
@Override
public void viewAccepted(View newView)
{
if (EqualsHelper.nullSafeEquals(lastView, newView))
{
// No change, so ignore
return;
}
int lastSize = (lastView == null) ? 0 : lastView.getMembers().size();
int newSize = newView.getMembers().size();
// Report
if (newSize < lastSize)
{
logger.warn("\n" +
"New cluster view with fewer members: \n" +
" Last View: " + lastView + "\n" +
" New View: " + newView);
}
else
{
logger.info("\n" +
"New cluster view with additional members: \n" +
" Last View: " + lastView + "\n" +
" New View: " + newView);
}
lastView = newView;
}
// private static final Log LOG = LogFactory.getLog(MulticastKeepaliveHeartbeatReceiver.class.getName());
//
// private ExecutorService processingThreadPool;
// private Set rmiUrlsProcessingQueue = Collections.synchronizedSet(new HashSet());
// private final InetAddress groupMulticastAddress;
// private final Integer groupMulticastPort;
// private MulticastReceiverThread receiverThread;
// private MulticastSocket socket;
// private boolean stopped;
// private final MulticastRMICacheManagerPeerProvider peerProvider;
//
// /**
// * Constructor.
// *
// * @param peerProvider
// * @param multicastAddress
// * @param multicastPort
// */
// public MulticastKeepaliveHeartbeatReceiver(
// MulticastRMICacheManagerPeerProvider peerProvider, InetAddress multicastAddress, Integer multicastPort) {
// this.peerProvider = peerProvider;
// this.groupMulticastAddress = multicastAddress;
// this.groupMulticastPort = multicastPort;
// }
//
// /**
// * Start.
// *
// * @throws IOException
// */
// final void init() throws IOException {
// socket = new MulticastSocket(groupMulticastPort.intValue());
// socket.joinGroup(groupMulticastAddress);
// receiverThread = new MulticastReceiverThread();
// receiverThread.start();
// processingThreadPool = Executors.newCachedThreadPool();
// }
//
// /**
// * Shutdown the heartbeat.
// */
// public final void dispose() {
// LOG.debug("dispose called");
// processingThreadPool.shutdownNow();
// stopped = true;
// receiverThread.interrupt();
// }
//
// /**
// * A multicast receiver which continously receives heartbeats.
// */
// private final class MulticastReceiverThread extends Thread {
//
// /**
// * Constructor
// */
// public MulticastReceiverThread() {
// super("Multicast Heartbeat Receiver Thread");
// setDaemon(true);
// }
//
// public final void run() {
// byte[] buf = new byte[PayloadUtil.MTU];
// try {
// while (!stopped) {
// DatagramPacket packet = new DatagramPacket(buf, buf.length);
// try {
// socket.receive(packet);
// byte[] payload = packet.getData();
// processPayload(payload);
//
//
// } catch (IOException e) {
// if (!stopped) {
// LOG.error("Error receiving heartbeat. " + e.getMessage() +
// ". Initial cause was " + e.getMessage(), e);
// }
// }
// }
// } catch (Throwable t) {
// LOG.error("Multicast receiver thread caught throwable. Cause was " + t.getMessage() + ". Continuing...");
// }
// }
//
// private void processPayload(byte[] compressedPayload) {
// byte[] payload = PayloadUtil.ungzip(compressedPayload);
// String rmiUrls = new String(payload);
// if (self(rmiUrls)) {
// return;
// }
// rmiUrls = rmiUrls.trim();
// if (LOG.isTraceEnabled()) {
// LOG.trace("rmiUrls received " + rmiUrls);
// }
// processRmiUrls(rmiUrls);
// }
//
// /**
// * This method forks a new executor to process the received heartbeat in a thread pool.
// * That way each remote cache manager cannot interfere with others.
// * <p/>
// * In the worst case, we have as many concurrent threads as remote cache managers.
// *
// * @param rmiUrls
// */
// private void processRmiUrls(final String rmiUrls) {
// if (rmiUrlsProcessingQueue.contains(rmiUrls)) {
// if (LOG.isDebugEnabled()) {
// LOG.debug("We are already processing these rmiUrls. Another heartbeat came before we finished: " + rmiUrls);
// }
// return;
// }
//
// if (processingThreadPool == null) {
// return;
// }
//
// processingThreadPool.execute(new Runnable() {
// public void run() {
// try {
// // Add the rmiUrls we are processing.
// rmiUrlsProcessingQueue.add(rmiUrls);
// for (StringTokenizer stringTokenizer = new StringTokenizer(rmiUrls,
// PayloadUtil.URL_DELIMITER); stringTokenizer.hasMoreTokens();) {
// if (stopped) {
// return;
// }
// String rmiUrl = stringTokenizer.nextToken();
// registerNotification(rmiUrl);
// if (!peerProvider.peerUrls.containsKey(rmiUrl)) {
// if (LOG.isDebugEnabled()) {
// LOG.debug("Aborting processing of rmiUrls since failed to add rmiUrl: " + rmiUrl);
// }
// return;
// }
// }
// } finally {
// // Remove the rmiUrls we just processed
// rmiUrlsProcessingQueue.remove(rmiUrls);
// }
// }
// });
// }
//
//
// /**
// * @param rmiUrls
// * @return true if our own hostname and listener port are found in the list. This then means we have
// * caught our onw multicast, and should be ignored.
// */
// private boolean self(String rmiUrls) {
// CacheManager cacheManager = peerProvider.getCacheManager();
// CacheManagerPeerListener cacheManagerPeerListener = cacheManager.getCachePeerListener();
// if (cacheManagerPeerListener == null) {
// return false;
// }
// List boundCachePeers = cacheManagerPeerListener.getBoundCachePeers();
// if (boundCachePeers == null || boundCachePeers.size() == 0) {
// return false;
// }
// CachePeer peer = (CachePeer) boundCachePeers.get(0);
// String cacheManagerUrlBase = null;
// try {
// cacheManagerUrlBase = peer.getUrlBase();
// } catch (RemoteException e) {
// LOG.error("Error geting url base");
// }
// int baseUrlMatch = rmiUrls.indexOf(cacheManagerUrlBase);
// return baseUrlMatch != -1;
// }
//
// private void registerNotification(String rmiUrl) {
// peerProvider.registerPeer(rmiUrl);
// }
//
//
// /**
// * {@inheritDoc}
// */
// public final void interrupt() {
// try {
// socket.leaveGroup(groupMulticastAddress);
// } catch (IOException e) {
// LOG.error("Error leaving group");
// }
// socket.close();
// super.interrupt();
// }
// }
//
//
}