/*******************************************************************************
* Copyright (c) 2014 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.core.util;
import org.eclipse.core.runtime.*;
import org.eclipse.ecf.internal.core.identity.Activator;
import org.osgi.framework.BundleContext;
import org.osgi.util.tracker.ServiceTracker;
/**
* @since 3.4
*/
public class ExtensionRegistryRunnable implements ISafeRunnable {
private BundleContext context;
public ExtensionRegistryRunnable(BundleContext ctxt) {
this.context = ctxt;
}
protected void runWithoutRegistry() throws Exception {
// by default do nothing
}
protected void runWithRegistry(IExtensionRegistry registry)
throws Exception {
// by default do nothing
}
protected void logWarning(Throwable exception) {
Activator a = Activator.getDefault();
if (a != null)
a.log(new Status(IStatus.WARNING, Activator.PLUGIN_ID,
IStatus.WARNING, "Warning: code cannot be run", exception)); //$NON-NLS-1$
}
public void run() throws Exception {
try {
runWithRegistry(getExtensionRegistry());
} catch (NoClassDefFoundError e) {
runWithoutRegistry();
}
}
private IExtensionRegistry getExtensionRegistry() {
if (context == null)
return null;
ServiceTracker extensionRegistryTracker = new ServiceTracker(context,
IExtensionRegistry.class.getName(), null);
extensionRegistryTracker.open();
IExtensionRegistry result = (IExtensionRegistry) extensionRegistryTracker
.getService();
extensionRegistryTracker.close();
return result;
}
public void handleException(Throwable exception) {
logWarning(exception);
}
}