| /******************************************************************************* |
| * Copyright (c) 2007 The Eclipse Foundation. |
| * 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: |
| * The Eclipse Foundation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.epp.usagedata.internal.gathering; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.epp.usagedata.internal.gathering.services.UsageDataService; |
| import org.eclipse.epp.usagedata.internal.gathering.settings.UsageDataCaptureSettings; |
| import org.eclipse.jface.util.IPropertyChangeListener; |
| import org.eclipse.jface.util.PropertyChangeEvent; |
| import org.eclipse.ui.IStartup; |
| import org.eclipse.ui.plugin.AbstractUIPlugin; |
| import org.eclipse.ui.progress.UIJob; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceRegistration; |
| import org.osgi.util.tracker.ServiceTracker; |
| |
| /** |
| * The activator class controls the plug-in life cycle |
| */ |
| public class UsageDataCaptureActivator extends AbstractUIPlugin implements IStartup { |
| |
| // The plug-in ID |
| public static final String PLUGIN_ID = "org.eclipse.epp.usagedata.gathering"; |
| |
| // The shared instance |
| private static UsageDataCaptureActivator plugin; |
| |
| private ServiceRegistration registration; |
| |
| private ServiceTracker usageDataServiceTracker; |
| |
| private UsageDataCaptureSettings settings; |
| |
| private BundleContext context; |
| |
| /* |
| * (non-Javadoc) |
| * @see org.eclipse.core.runtime.Plugins#start(org.osgi.framework.BundleContext) |
| */ |
| public void start(BundleContext context) throws Exception { |
| super.start(context); |
| plugin = this; |
| this.context = context; |
| |
| settings = new UsageDataCaptureSettings(); |
| |
| final UsageDataService service = new UsageDataService(); |
| |
| getPreferenceStore().addPropertyChangeListener(new IPropertyChangeListener() { |
| |
| public void propertyChange(PropertyChangeEvent event) { |
| if (UsageDataCaptureSettings.CAPTURE_ENABLED_KEY.equals(event.getProperty())) { |
| if (isTrue(event.getNewValue())) { |
| service.startMonitoring(); |
| } else { |
| service.stopMonitoring(); |
| } |
| } |
| } |
| |
| private boolean isTrue(Object newValue) { |
| if (newValue instanceof Boolean) return ((Boolean)newValue).booleanValue(); |
| if (newValue instanceof String) return Boolean.valueOf((String)newValue); |
| return false; |
| } |
| |
| }); |
| |
| // TODO There is basically no value to having this as a service at this point. |
| // In fact, there is potential for some weirdness with this as a service. For |
| // example, if the service is shut down it will just keep running anyway. |
| registration = context.registerService(UsageDataService.class.getName(), service, null); |
| |
| usageDataServiceTracker = new ServiceTracker(context, UsageDataService.class.getName(), null); |
| usageDataServiceTracker.open(); |
| |
| /* |
| * Create a job that starts the UsageDataService in the UI Thread. This |
| * should happen well after this method has exited and the bundle is |
| * done activating and is in the "started" state. This was initially |
| * done to overcome a problem in which some of the monitors spun off |
| * jobs that resulted in multiple threads inadvertently trying to |
| * activate this bundle concurrently. The conditions that caused this |
| * problem have been rectified. |
| * |
| * In spite of the fact that the problem no longer exists, we're keeping |
| * the UIJob as this is a potentially expensive operation. |
| */ |
| UIJob job = new UIJob("Usage Data Service Starter") { |
| public IStatus runInUIThread(IProgressMonitor monitor) { |
| if (settings.isEnabled()) { |
| service.startMonitoring(); |
| } |
| return Status.OK_STATUS; |
| } |
| |
| }; |
| job.schedule(1000); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * @see org.eclipse.core.runtime.Plugin#stop(org.osgi.framework.BundleContext) |
| */ |
| public void stop(BundleContext context) throws Exception { |
| this.context = context; |
| UsageDataService service = getUsageDataCaptureService(); |
| if (service != null) service.stopMonitoring(); |
| |
| usageDataServiceTracker.close(); |
| registration.unregister(); |
| |
| plugin = null; |
| super.stop(context); |
| } |
| |
| private UsageDataService getUsageDataCaptureService() { |
| return (UsageDataService)usageDataServiceTracker.getService(); |
| } |
| |
| /** |
| * Returns the shared instance |
| * |
| * @return the shared instance |
| */ |
| public static UsageDataCaptureActivator getDefault() { |
| return plugin; |
| } |
| |
| public void earlyStartup() { |
| // Do nothing. |
| } |
| |
| /** |
| * <p> |
| * This is a convenience method for logging an exception. |
| * </p> |
| * |
| * @param message |
| * a {@link String} message to include in the log. |
| * @param e |
| * the exception to capture in the log. |
| */ |
| public void logException(String message, Throwable e) { |
| getLog().log(new Status(IStatus.ERROR, PLUGIN_ID, message, e)); |
| } |
| |
| /** |
| * <p> |
| * This method returns the settings object for the usage data gathering |
| * plug-in. |
| * </p> |
| * |
| * @see UsageDataCaptureSettings |
| * @return the instance of {@link UsageDataCaptureSettings} owned by the |
| * receiver. |
| */ |
| public UsageDataCaptureSettings getSettings() { |
| return settings; |
| } |
| |
| public BundleContext getContext() { |
| return context; |
| } |
| } |