| /******************************************************************************* |
| * Copyright (c) 2003, 2014 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 - Initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.core.internal.jobs; |
| |
| import org.eclipse.core.internal.runtime.RuntimeLog; |
| import org.eclipse.core.runtime.*; |
| import org.eclipse.core.runtime.jobs.*; |
| import org.eclipse.osgi.util.NLS; |
| |
| /** |
| * Responsible for notifying all job listeners about job lifecycle events. Uses a |
| * specialized iterator to ensure the complex iteration logic is contained in one place. |
| */ |
| class JobListeners { |
| interface IListenerDoit { |
| public void notify(IJobChangeListener listener, IJobChangeEvent event); |
| } |
| |
| private final IListenerDoit aboutToRun = new IListenerDoit() { |
| @Override |
| public void notify(IJobChangeListener listener, IJobChangeEvent event) { |
| listener.aboutToRun(event); |
| } |
| }; |
| private final IListenerDoit awake = new IListenerDoit() { |
| @Override |
| public void notify(IJobChangeListener listener, IJobChangeEvent event) { |
| listener.awake(event); |
| } |
| }; |
| private final IListenerDoit done = new IListenerDoit() { |
| @Override |
| public void notify(IJobChangeListener listener, IJobChangeEvent event) { |
| listener.done(event); |
| } |
| }; |
| private final IListenerDoit running = new IListenerDoit() { |
| @Override |
| public void notify(IJobChangeListener listener, IJobChangeEvent event) { |
| listener.running(event); |
| } |
| }; |
| private final IListenerDoit scheduled = new IListenerDoit() { |
| @Override |
| public void notify(IJobChangeListener listener, IJobChangeEvent event) { |
| listener.scheduled(event); |
| } |
| }; |
| private final IListenerDoit sleeping = new IListenerDoit() { |
| @Override |
| public void notify(IJobChangeListener listener, IJobChangeEvent event) { |
| listener.sleeping(event); |
| } |
| }; |
| /** |
| * The global job listeners. |
| */ |
| protected final ListenerList<IJobChangeListener> global = new ListenerList<>(ListenerList.IDENTITY); |
| |
| /** |
| * TODO Could use an instance pool to re-use old event objects |
| */ |
| static JobChangeEvent newEvent(Job job) { |
| JobChangeEvent instance = new JobChangeEvent(); |
| instance.job = job; |
| return instance; |
| } |
| |
| static JobChangeEvent newEvent(Job job, IStatus result) { |
| JobChangeEvent instance = new JobChangeEvent(); |
| instance.job = job; |
| instance.result = result; |
| return instance; |
| } |
| |
| static JobChangeEvent newEvent(Job job, long delay) { |
| JobChangeEvent instance = new JobChangeEvent(); |
| instance.job = job; |
| instance.delay = delay; |
| return instance; |
| } |
| |
| /** |
| * Process the given doit for all global listeners and all local listeners |
| * on the given job. |
| */ |
| private void doNotify(final IListenerDoit doit, final IJobChangeEvent event) { |
| //notify all global listeners |
| for (IJobChangeListener listener : global) { |
| try { |
| doit.notify(listener, event); |
| } catch (Throwable e) { |
| handleException(listener, e); |
| } |
| } |
| for (IJobChangeListener listener : ((InternalJob) event.getJob()).getListeners()) { |
| try { |
| doit.notify(listener, event); |
| } catch (Throwable e) { |
| handleException(listener, e); |
| } |
| } |
| } |
| |
| private void handleException(IJobChangeListener listener, Throwable e) { |
| //this code is roughly copied from InternalPlatform.run(ISafeRunnable), |
| //but in-lined here for performance reasons |
| if (e instanceof OperationCanceledException) |
| return; |
| String pluginId = JobOSGiUtils.getDefault().getBundleId(listener); |
| if (pluginId == null) |
| pluginId = JobManager.PI_JOBS; |
| String message = NLS.bind(JobMessages.meta_pluginProblems, pluginId); |
| RuntimeLog.log(new Status(IStatus.ERROR, pluginId, JobManager.PLUGIN_ERROR, message, e)); |
| } |
| |
| public void add(IJobChangeListener listener) { |
| global.add(listener); |
| } |
| |
| public void remove(IJobChangeListener listener) { |
| global.remove(listener); |
| } |
| |
| public void aboutToRun(Job job) { |
| doNotify(aboutToRun, newEvent(job)); |
| } |
| |
| public void awake(Job job) { |
| doNotify(awake, newEvent(job)); |
| } |
| |
| public void done(Job job, IStatus result, boolean reschedule) { |
| JobChangeEvent event = newEvent(job, result); |
| event.reschedule = reschedule; |
| doNotify(done, event); |
| } |
| |
| public void running(Job job) { |
| doNotify(running, newEvent(job)); |
| } |
| |
| public void scheduled(Job job, long delay, boolean reschedule) { |
| JobChangeEvent event = newEvent(job, delay); |
| event.reschedule = reschedule; |
| doNotify(scheduled, event); |
| } |
| |
| public void sleeping(Job job) { |
| doNotify(sleeping, newEvent(job)); |
| } |
| } |