/*
* 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.
*/
package org.apache.geronimo.st.core;
import java.util.TimerTask;
import org.apache.geronimo.st.core.internal.Trace;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.wst.server.core.IServer;
import org.eclipse.wst.server.core.ServerCore;
import org.eclipse.wst.server.core.internal.Server;
/**
* @version $Rev: 817996 $ $Date: 2009-09-23 16:04:12 +0800 (Wed, 23 Sep 2009) $
*/
public class UpdateServerStateTask extends TimerTask {
private IGeronimoServerBehavior delegate;
private IServer server;
public UpdateServerStateTask(IGeronimoServerBehavior delegate, IServer server) {
super();
this.delegate = delegate;
this.server = server;
}
/*
* (non-Javadoc)
*
* @see java.util.TimerTask#run()
*/
public void run() {
if (canUpdateState()) {
updateServerState();
}
}
/**
* Returns true if either the connection URL is unique for all g-servers or
* if all other servers that share the same connection URL but have
* different runtime locations are stopped.
*
* @return true if ok to update state
*/
private boolean canUpdateState() {
IGeronimoServer thisServer = (IGeronimoServer) this.server.loadAdapter(IGeronimoServer.class, null);
IServer[] allServers = ServerCore.getServers();
for (int i = 0; i < allServers.length; i++) {
IServer server = allServers[i];
IGeronimoServer gs = (IGeronimoServer) server.loadAdapter(IGeronimoServer.class, null);
if (gs != null && !this.server.getId().equals(server.getId())) {
if (isSameConnectionURL(gs, thisServer)) {
if (!isSameRuntimeLocation(server) && server.getServerState() != IServer.STATE_STOPPED) {
Trace.trace(Trace.WARNING, server.getId() + " Cannot update server state. URL conflict between multiple servers.");
return false;
}
}
}
}
return true;
}
private boolean isSameRuntimeLocation(IServer server) {
return server.getRuntime().getLocation().equals(this.server.getRuntime().getLocation());
}
private boolean isSameConnectionURL(IGeronimoServer server, IGeronimoServer thisServer) {
return server.getJMXServiceURL().equals(thisServer.getJMXServiceURL());
}
private void updateServerState() {
Trace.trace(Trace.INFO, ">> " + server.getId() + " Updating Server State.");
try {
switch (server.getServerState()) {
case IServer.STATE_STOPPED:
if (delegate.isKernelAlive())
updateFromStopped();
break;
case IServer.STATE_STARTING:
if (delegate.isKernelAlive())
updateFromStarting();
else
delegate.setServerStopped();
break;
case IServer.STATE_STARTED:
updateFromStarted();
break;
}
} catch (Exception e) {
e.printStackTrace();
}
Trace.trace(Trace.INFO, "<< " + server.getId() + " Updating Server State.");
}
private void updateFromStopped() throws CoreException {
if (isFullyStarted()) {
delegate.setServerStarted();
} else {
((Server) server).setServerState(IServer.STATE_STARTING);
}
}
private void updateFromStarting() throws CoreException {
if (isFullyStarted())
delegate.setServerStarted();
}
private void updateFromStarted() throws CoreException {
if (!isFullyStarted())
delegate.setServerStopped();
}
private boolean isFullyStarted() throws CoreException {
ClassLoader old = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(((GeronimoServerBehaviourDelegate) delegate).getContextClassLoader());
return delegate.isFullyStarted();
} finally {
Thread.currentThread().setContextClassLoader(old);
}
}
}