| /******************************************************************************* |
| * Copyright (c) 2009 Tasktop Technologies 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: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.commons.net; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.net.Socket; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.mylyn.commons.net.WebRequest; |
| |
| /** |
| * @author Steffen Pingel |
| */ |
| public abstract class MonitoredRequest<T> extends WebRequest<T> implements ICancellable { |
| |
| private static ThreadLocal<MonitoredRequest<?>> currentRequest = new ThreadLocal<MonitoredRequest<?>>(); |
| |
| public static MonitoredRequest<?> getCurrentRequest() { |
| return currentRequest.get(); |
| } |
| |
| public static void setCurrentRequest(MonitoredRequest<?> request) { |
| currentRequest.set(request); |
| } |
| |
| private final CopyOnWriteArrayList<ICancellable> listeners = new CopyOnWriteArrayList<ICancellable>(); |
| |
| private final IProgressMonitor monitor; |
| |
| public MonitoredRequest(IProgressMonitor monitor) { |
| Assert.isNotNull(monitor); |
| this.monitor = monitor; |
| } |
| |
| public T call() throws Exception { |
| try { |
| assert MonitoredRequest.getCurrentRequest() == null; |
| MonitoredRequest.setCurrentRequest(this); |
| return execute(); |
| } finally { |
| MonitoredRequest.setCurrentRequest(null); |
| listeners.clear(); |
| } |
| } |
| |
| protected abstract T execute() throws Exception; |
| |
| @Override |
| public void abort() { |
| for (ICancellable listener : listeners.toArray(new ICancellable[0])) { |
| try { |
| listener.abort(); |
| } catch (Exception e) { |
| // ignore |
| } |
| } |
| } |
| |
| public void addListener(ICancellable listener) { |
| listeners.add(listener); |
| } |
| |
| public IProgressMonitor getMonitor() { |
| return monitor; |
| } |
| |
| public void removeListener(ICancellable listener) { |
| listeners.remove(listener); |
| } |
| |
| public static void connect(final Socket socket, InetSocketAddress address, int timeout) throws IOException { |
| MonitoredRequest<?> request = MonitoredRequest.getCurrentRequest(); |
| if (request != null) { |
| ICancellable listener = new ICancellable() { |
| public void abort() { |
| try { |
| socket.close(); |
| } catch (IOException e) { |
| // ignore |
| } |
| } |
| }; |
| try { |
| request.addListener(listener); |
| socket.connect(address, timeout); |
| } finally { |
| request.removeListener(listener); |
| } |
| } else { |
| socket.connect(address, timeout); |
| } |
| } |
| |
| } |