framework/bundles/org.eclipse.ecf.remoteservice.rest.synd/src/org/eclipse/ecf/internal/remoteservice/rest/synd/Activator.java

/*******************************************************************************
 * Copyright (c) 2010 Naumen. 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: Pavel Samolisov - initial API and implementation
 ******************************************************************************/
package org.eclipse.ecf.internal.remoteservice.rest.synd;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.ecf.core.util.LogHelper;
import org.eclipse.ecf.core.util.SystemLogService;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.service.log.LogService;
import org.osgi.util.tracker.ServiceTracker;

public class Activator implements BundleActivator {

	// The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.ecf.remoteservice.rest.rss"; //$NON-NLS-1$

	// The shared instance
	private static Activator plugin;

	private BundleContext context;

	private ServiceTracker logServiceTracker = null;

	private LogService logService = null;

	/**
	 * The constructor
	 */
	public Activator() {
		plugin = this;
	}

	/*
	 * (non-Javadoc)
	 * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext bundleContext) throws Exception {
		this.context = bundleContext;
	}

	/*
	 * (non-Javadoc)
	 * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext bundleContext) throws Exception {
		this.context = null;
		if (logServiceTracker != null) {
			logServiceTracker.close();
			logServiceTracker = null;
			logService = null;
		}
		this.context = null;
		plugin = null;
	}

	/**
	 * Returns the shared instance
	 *
	 * @return the shared instance
	 */
	public synchronized static Activator getDefault() {
		if (plugin == null) {
			plugin = new Activator();
		}
		return plugin;
	}

	protected LogService getLogService() {
		if (logServiceTracker == null) {
			logServiceTracker = new ServiceTracker(this.context, LogService.class.getName(), null);
			logServiceTracker.open();
		}
		logService = (LogService) logServiceTracker.getService();
		if (logService == null)
			logService = new SystemLogService(PLUGIN_ID);
		return logService;
	}

	public void log(IStatus status) {
		if (logService == null)
			logService = getLogService();
		if (logService != null)
			logService.log(LogHelper.getLogCode(status), LogHelper.getLogMessage(status), status.getException());
	}
}