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/*******************************************************************************
* Copyright (c) 2004 Composent, Inc. 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: Composent, Inc. - initial API and implementation
******************************************************************************/
package org.eclipse.ecf.internal.discovery;
import org.eclipse.core.runtime.*;
import org.eclipse.ecf.core.util.LogHelper;
import org.eclipse.ecf.core.util.PlatformHelper;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.service.log.LogService;
import org.osgi.util.tracker.ServiceTracker;
/**
* The main plugin class to be used in the desktop.
*/
public class DiscoveryPlugin implements BundleActivator {
public static final String PLUGIN_ID = "org.eclipse.ecf.discovery"; //$NON-NLS-1$
// The shared instance.
private static DiscoveryPlugin plugin;
private BundleContext context;
private ServiceTracker adapterManagerTracker;
private ServiceTracker logServiceTracker = null;
/**
* The constructor.
*/
public DiscoveryPlugin() {
super();
plugin = this;
}
public IAdapterManager getAdapterManager() {
// First, try to get the adapter manager via
if (adapterManagerTracker == null) {
adapterManagerTracker = new ServiceTracker(this.context, IAdapterManager.class.getName(), null);
adapterManagerTracker.open();
}
IAdapterManager adapterManager = (IAdapterManager) adapterManagerTracker.getService();
// Then, if the service isn't there, try to get from Platform class via
// PlatformHelper class
if (adapterManager == null)
adapterManager = PlatformHelper.getPlatformAdapterManager();
if (adapterManager == null)
getDefault().log(new Status(IStatus.ERROR, PLUGIN_ID, IStatus.ERROR, "Cannot get adapter manager", null)); //$NON-NLS-1$
return adapterManager;
}
public LogService getLogService() {
if (logServiceTracker == null) {
logServiceTracker = new ServiceTracker(this.context, LogService.class.getName(), null);
logServiceTracker.open();
}
return (LogService) logServiceTracker.getService();
}
public void log(IStatus status) {
LogService logService = getLogService();
if (logService != null) {
logService.log(LogHelper.getLogCode(status), LogHelper.getLogMessage(status), status.getException());
}
}
/**
* This method is called upon plug-in activation
* @param ctxt the bundle context
* @throws Exception
*/
public void start(BundleContext ctxt) throws Exception {
this.context = ctxt;
}
/**
* This method is called when the plug-in is stopped
* @param ctxt the bundle context
* @throws Exception
*/
public void stop(BundleContext ctxt) throws Exception {
if (logServiceTracker != null) {
logServiceTracker.close();
logServiceTracker = null;
}
if (adapterManagerTracker != null) {
adapterManagerTracker.close();
adapterManagerTracker = null;
}
plugin = null;
this.context = null;
}
/**
* Returns the shared instance.
* @return default discovery plugin instance.
*/
public synchronized static DiscoveryPlugin getDefault() {
if (plugin == null) {
plugin = new DiscoveryPlugin();
}
return plugin;
}
public static boolean isStopped() {
return plugin == null;
}
public BundleContext getBundleContext() {
return context;
}
}
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