| /******************************************************************************* |
| * Copyright (c) 2009, 2012 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.core.internal.jobs; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.jobs.Job; |
| |
| /** |
| * Used to perform internal JobManager tasks. Currently, this is limited to checking |
| * progress monitors while a thread is performing a blocking wait in ThreadJob. |
| */ |
| public class InternalWorker extends Thread { |
| private final JobManager manager; |
| /** |
| * @GuardedBy("manager.monitorStack") |
| */ |
| private boolean canceled; |
| |
| InternalWorker(JobManager manager) { |
| super("Worker-JM"); //$NON-NLS-1$ |
| this.manager = manager; |
| } |
| |
| /** |
| * Will loop until there are progress monitors to check. While there are monitors |
| * registered, it will check cancelation every 250ms, and if it is canceled it will |
| * interrupt the ThreadJob that is performing a blocking wait. |
| */ |
| @Override |
| public void run() { |
| int timeout = 0; |
| synchronized (manager.monitorStack) { |
| while (!canceled) { |
| if (manager.monitorStack.isEmpty()) { |
| timeout = 0; |
| } else { |
| timeout = 250; |
| } |
| for (int i = 0; i < manager.monitorStack.size(); i++) { |
| Object[] o = manager.monitorStack.get(i); |
| IProgressMonitor monitor = (IProgressMonitor) o[1]; |
| if (monitor.isCanceled()) { |
| Job job = (Job) o[0]; |
| Thread t = job.getThread(); |
| if (t != null) { |
| t.interrupt(); |
| } |
| } |
| } |
| try { |
| manager.monitorStack.wait(timeout); |
| } catch (InterruptedException e) { |
| // loop |
| } |
| } |
| } |
| } |
| |
| /** |
| * Terminate this thread. Once terminated, it cannot be restarted. |
| */ |
| void cancel() { |
| synchronized (manager.monitorStack) { |
| canceled = true; |
| manager.monitorStack.notifyAll(); |
| } |
| } |
| } |