| /******************************************************************************* |
| * Copyright (c) 2005, 2006 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.equinox.internal.app; |
| |
| import java.security.Guard; |
| import java.security.GuardedObject; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.eclipse.osgi.framework.log.FrameworkLogEntry; |
| import org.eclipse.osgi.util.NLS; |
| import org.osgi.framework.*; |
| import org.osgi.service.application.ApplicationDescriptor; |
| import org.osgi.service.application.ScheduledApplication; |
| import org.osgi.service.event.*; |
| import org.osgi.util.tracker.ServiceTracker; |
| |
| public class EclipseScheduledApplication implements ScheduledApplication, EventHandler { |
| private static final String FILTER_PREFIX = "(&(objectclass=" + ApplicationDescriptor.class.getName() + ")(" + ApplicationDescriptor.APPLICATION_PID + "="; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| private static final String FILTER_POSTFIX = "))"; //$NON-NLS-1$ |
| |
| private boolean recurring; |
| private String topic; |
| private String eventFilter; |
| private Map args; |
| private String appPid; |
| private String id; |
| private ServiceRegistration sr; |
| private ServiceTracker appTracker; |
| private boolean removed = false; |
| |
| EclipseScheduledApplication(BundleContext context, String id, String appPid, Map args, String topic, String eventFilter, boolean recurring) throws InvalidSyntaxException { |
| this.id = id; |
| this.appPid = appPid; |
| this.args = args; |
| this.topic = topic == null || topic.trim().equals("") || topic.trim().equals("*") ? null : topic; //$NON-NLS-1$ //$NON-NLS-2$ |
| this.eventFilter = eventFilter; |
| this.recurring = recurring; |
| appTracker = new ServiceTracker(context, context.createFilter(FILTER_PREFIX + appPid + FILTER_POSTFIX), null); |
| Activator.openTracker(appTracker, false); |
| } |
| |
| public String getScheduleId() { |
| return id; |
| } |
| |
| String getAppPid() { |
| return appPid; |
| } |
| |
| public synchronized String getTopic() { |
| if (removed) |
| throw new IllegalStateException(Messages.scheduled_app_removed); |
| return topic; |
| } |
| |
| public synchronized String getEventFilter() { |
| if (removed) |
| throw new IllegalStateException(Messages.scheduled_app_removed); |
| return eventFilter; |
| } |
| |
| public synchronized boolean isRecurring() { |
| if (removed) |
| throw new IllegalStateException(Messages.scheduled_app_removed); |
| return recurring; |
| } |
| |
| public synchronized ApplicationDescriptor getApplicationDescriptor() { |
| if (removed) |
| throw new IllegalStateException(Messages.scheduled_app_removed); |
| return (ApplicationDescriptor) Activator.getService(appTracker); |
| } |
| |
| public synchronized Map getArguments() { |
| if (removed) |
| throw new IllegalStateException(Messages.scheduled_app_removed); |
| return args == null ? null : new HashMap(args); |
| } |
| |
| private Map getArguments(Event trigger) { |
| Map result = args == null ? new HashMap() : getArguments(); |
| result.put(TRIGGERING_EVENT, new GuardedObject(trigger, new TriggerGuard(trigger.getTopic()))); |
| return result; |
| } |
| |
| public synchronized void remove() { |
| if (removed) |
| return; |
| removed = true; |
| AppPersistence.removeScheduledApp(this); |
| if (sr != null) |
| sr.unregister(); |
| sr = null; |
| appTracker.close(); |
| } |
| |
| public synchronized void handleEvent(Event event) { |
| try { |
| if (removed) |
| return; |
| ApplicationDescriptor desc = getApplicationDescriptor(); |
| if (desc == null) |
| // in this case the application descriptor was removed; |
| // we must return and keep the scheduled app incase the application comes back |
| return; |
| desc.launch(getArguments(event)); |
| } catch (Exception e) { |
| String message = NLS.bind(Messages.scheduled_app_launch_error, sr); |
| Activator.log(new FrameworkLogEntry(Activator.PI_APP, FrameworkLogEntry.WARNING, 0, message, 0, e, null)); |
| return; // return here to avoid removing non-recurring apps when an error occurs |
| } |
| if (!isRecurring()) |
| remove(); |
| } |
| |
| synchronized void setServiceRegistration(ServiceRegistration sr) { |
| this.sr = sr; |
| if (removed) // just incase we were removed before the sr was set |
| sr.unregister(); |
| } |
| |
| /* |
| * This is used to guard the event topic argument which is passed to an application |
| * when we are launching it from a scheduling. |
| */ |
| public class TriggerGuard implements Guard { |
| String eventTopic; |
| |
| public TriggerGuard(String topic) { |
| this.eventTopic = topic; |
| } |
| |
| /* |
| * does the proper TopicPermission check for the event topic |
| */ |
| public void checkGuard(Object object) throws SecurityException { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) |
| sm.checkPermission(new TopicPermission(eventTopic, TopicPermission.SUBSCRIBE)); |
| } |
| |
| } |
| } |