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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.help.internal.appserver;
import org.eclipse.core.runtime.*;
import org.osgi.framework.*;
/**
*/
public class AppserverPlugin extends Plugin {
public final static String PLUGIN_ID = "org.eclipse.help.appserver"; //$NON-NLS-1$
public final static String HOST_KEY = "host"; //$NON-NLS-1$
public final static String PORT_KEY = "port"; //$NON-NLS-1$
private final static String APP_SERVER_EXTENSION_ID = PLUGIN_ID + ".server"; //$NON-NLS-1$
private static final String APP_SERVER_CLASS_ATTRIBUTE = "class"; //$NON-NLS-1$
private static final String APP_SERVER_DEFAULT_ATTRIBUTE = "default"; //$NON-NLS-1$
// singleton object
private static AppserverPlugin plugin;
// private static BundleContext bundleContext;
private IWebappServer appServer;
private String contributingServerPlugin;
private String hostAddress;
private int port;
/**
*/
public static AppserverPlugin getDefault() {
return plugin;
}
/**
* Returns the instance of WebappServer.
*/
public synchronized IWebappServer getAppServer() throws CoreException {
if (appServer == null) {
createWebappServer();
startWebappServer();
}
return appServer;
}
/*
* (non-Javadoc)
*
* @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
*/
public void stop(BundleContext context) throws Exception {
if (appServer != null) {
appServer.stop();
}
plugin = null;
// bundleContext = null;
super.stop(context);
}
/*
* (non-Javadoc)
*
* @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
*/
public void start(BundleContext context) throws Exception {
super.start(context);
plugin = this;
// bundleContext = context;
}
/**
* Returns the plugin ID that contributes the server implementation
*
* @return String
*/
public String getContributingServerPlugin() {
return contributingServerPlugin;
}
private void createWebappServer() throws CoreException {
// Initializes the app server by getting an instance via
// app-server the extension point
// get the app server extension from the system plugin registry
IExtensionPoint point = Platform.getExtensionRegistry()
.getExtensionPoint(APP_SERVER_EXTENSION_ID);
if (point != null) {
IExtension[] extensions = point.getExtensions();
if (extensions.length != 0) {
// We need to pick up the non-default configuration
IConfigurationElement[] elements = extensions[0]
.getConfigurationElements();
if (elements.length == 0)
return;
IConfigurationElement serverElement = null;
for (int i = 0; i < elements.length; i++) {
String defaultValue = elements[i]
.getAttribute(APP_SERVER_DEFAULT_ATTRIBUTE);
if (defaultValue == null || defaultValue.equals("false")) { //$NON-NLS-1$
serverElement = elements[i];
break;
}
}
// if all the servers are default, then pick the first one
if (serverElement == null)
serverElement = elements[0];
// Instantiate the app server
try {
appServer = (IWebappServer) serverElement
.createExecutableExtension(APP_SERVER_CLASS_ATTRIBUTE);
contributingServerPlugin = serverElement
.getNamespace();
} catch (CoreException e) {
getLog().log(e.getStatus());
throw e;
}
}
}
}
private void startWebappServer() throws CoreException {
// Initialize host and port from preferences
hostAddress = getPluginPreferences().getString(HOST_KEY);
if ("".equals(hostAddress)) { //$NON-NLS-1$
hostAddress = null;
}
port = getPluginPreferences().getInt(PORT_KEY);
// apply host and port overrides passed as command line arguments
try {
String hostCommandLineOverride = System.getProperty("server_host"); //$NON-NLS-1$
if (hostCommandLineOverride != null
&& hostCommandLineOverride.trim().length() > 0) {
hostAddress = hostCommandLineOverride;
}
} catch (Exception e) {
}
try {
String portCommandLineOverride = System.getProperty("server_port"); //$NON-NLS-1$
if (portCommandLineOverride != null
&& portCommandLineOverride.trim().length() > 0) {
port = Integer.parseInt(portCommandLineOverride);
}
} catch (Exception e) {
}
if (appServer == null)
throw new CoreException(new Status(IStatus.ERROR, PLUGIN_ID,
IStatus.OK,
AppserverResources.Appserver_start, null));
appServer.start(port, hostAddress);
}
}
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