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/*******************************************************************************
* Copyright (c) 2011 Sonatype, Inc.
* 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:
* Sonatype, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.m2e.internal.udc;
import org.eclipse.core.runtime.Platform;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleEvent;
import org.osgi.framework.BundleListener;
/*
* Listen for the maven core bundle starting to avoid early activation by the usage data collector
*/
public class Activator implements BundleActivator, BundleListener {
private static final String ORG_ECLIPSE_M2E_CORE = "org.eclipse.m2e.core"; //$NON-NLS-1$
private static Activator instance;
private volatile MavenListener listener;
private PomImportMonitor monitor;
private BundleContext context;
public void start(BundleContext context) throws Exception {
this.context = context;
instance = this;
}
public void stop(BundleContext context) throws Exception {
context.removeBundleListener(this);
if (listener != null) {
listener.stopListener();
listener = null;
}
}
public void bundleChanged(BundleEvent event) {
if (event.getType() == BundleEvent.STARTED && ORG_ECLIPSE_M2E_CORE.equals(event.getBundle().getSymbolicName())) {
createListener();
// Don't care about future events so the listener can be removed
context.removeBundleListener(this);
}
}
static Activator getDefault() {
return instance;
}
void setMonitor(PomImportMonitor monitor) {
this.monitor = monitor;
// If the m2e core bundle is already active create listener for project
// changes, otherwise listen for bundle started events
Bundle b = Platform.getBundle(ORG_ECLIPSE_M2E_CORE);
if (b.getState() == Bundle.ACTIVE) {
createListener();
} else {
context.addBundleListener(this);
}
}
private synchronized void createListener() {
if (listener == null) {
listener = new MavenListener(monitor);
}
}
}
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