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/*
* ReplicationLifecycleImpl.java
*
* Created on April 16, 2007, 3:11 PM
*
*/
package com.sun.enterprise.ee.web.initialization;
import com.sun.corba.ee.org.objectweb.asm.tree.analysis.Value;
import org.apache.catalina.LifecycleException;
import com.sun.appserv.server.ServerLifecycleException;
import com.sun.appserv.server.ServerLifecycleImpl;
import com.sun.enterprise.web.ServerConfigLookup;
import com.sun.enterprise.ee.web.sessmgmt.JxtaReplicationReceiver;
import com.sun.enterprise.ee.web.sessmgmt.ReplicationHealthChecker;
import com.sun.enterprise.ee.web.sessmgmt.ReplicationMessageRouter;
import com.sun.enterprise.ee.web.sessmgmt.ReplicationUtil;
import com.sun.enterprise.ee.web.sessmgmt.RollingUpgradeException;
import com.sun.enterprise.ee.web.sessmgmt.RollingUpgradeHandler;
import com.sun.enterprise.server.ServerContext;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
/**
*
* @author Larry White
*/
public class ReplicationLifecycleImpl extends ServerLifecycleImpl {
private static final long TEST_DURATION_SECONDS = 10 * 60L; //10 minutes todo remove after testing
private static final long TEST_DRAINTIME_SECONDS = 10L; //10 seconds todo remove after testing
public void onTermination() throws ServerLifecycleException {
if(!isNativeReplicationEnabled()) {
return;
}
JxtaReplicationReceiver jxtaReplicationReceiver
= JxtaReplicationReceiver.createInstance();
//System.out.println("ReplicationLifecycleImpl:about to call JxtaReplicationReceiver.stop()");
try {
jxtaReplicationReceiver.stop();
} catch (LifecycleException ex) {}
}
/**
* Server is shutting down applications
*
* @exception ServerLifecycleException if this subsystem detects a fatal
* error that prevents this subsystem from being used
*/
public void onShutdown()
throws ServerLifecycleException {
if(!isNativeReplicationEnabled()) {
return;
}
//do not block this thread if the cluster as a whole is stopping
//System.out.println("isClusterStopping: " + ReplicationHealthChecker.isClusterStopping());
if(ReplicationHealthChecker.isClusterStopping()) {
return;
}
//do not block this thread if jxta pipes have never
//been initialized this means no replication enabled app was
//ever deployed since this server instance started
ReplicationHealthChecker healthChecker = ReplicationHealthChecker.getInstance();
if(!healthChecker.isPipeInitializationCalled()) {
return;
}
//FIXME: this will be triggered from separate asadmin command
//this is just for testing
if(ReplicationUtil.isRollingUpgradeEnabled()) {
try {
RollingUpgradeHandler.backupSessionState(TEST_DURATION_SECONDS, TEST_DRAINTIME_SECONDS);
} catch (RollingUpgradeException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
int unloadWaitTime = getMaxSessionUnloadTimeInSeconds(); //7 minutes by default
//zero value means do not wait at all
if(unloadWaitTime == 0
|| !isRepairDuringFailure()
|| ReplicationUtil.isRollingUpgradeEnabled()) {
return;
}
JxtaReplicationReceiver jxtaReplicationReceiver
= JxtaReplicationReceiver.createInstance();
//System.out.println("ReplicationLifecycleImpl:about to call JxtaReplicationReceiver.stop()");
jxtaReplicationReceiver.repairOnCurrentThread();
//FIXME for 9.1ur1 only do this if we have a background dispatcher
//that we guarantee will call doneSignal.countdown()
CountDownLatch doneSignal = ReplicationHealthChecker.getDoneSignal();
ReplicationHealthChecker.setFlushThreadWaiting(true);
try {
doneSignal.await(unloadWaitTime, TimeUnit.SECONDS);
} catch(InterruptedException ex) {
} finally {
ReplicationHealthChecker.setFlushThreadWaiting(false);
}
}
/**
* Server has complted loading the applications and is ready to serve requests.
*
* @param sc ServerContext the server runtime context.
*
* @exception ServerLifecycleException if this subsystem detects a fatal
* error that prevents this subsystem from being used
*/
public void onReady(ServerContext sc) throws ServerLifecycleException {
//FIXME: this will be triggered from separate asadmin command
//this is just for testing
if(ReplicationUtil.isRollingUpgradeEnabled()) {
try {
RollingUpgradeHandler.restoreSessionState(TEST_DURATION_SECONDS);
} catch (RollingUpgradeException e) {
e.printStackTrace();
}
// put in when ready to test reconciliation
try {
RollingUpgradeHandler.reconcileSessionState(TEST_DURATION_SECONDS);
} catch (RollingUpgradeException e) {
e.printStackTrace();
}
//
}
}
private boolean isNativeReplicationEnabled() {
ServerConfigLookup lookup = new ServerConfigLookup();
return lookup.isGMSEnabled() && lookup.isNativeReplicationEnabledFromConfig();
}
private int getMaxSessionUnloadTimeInSeconds() {
ServerConfigLookup lookup = new ServerConfigLookup();
return lookup.getMaxSessionUnloadTimeInSecondsPropertyFromConfig();
}
private boolean isRepairDuringFailure() {
ServerConfigLookup lookup = new ServerConfigLookup();
return lookup.isRepairDuringFailure();
}
}