| /****************************************************************************** |
| * Copyright (c) 2006 IBM Corporation. |
| * 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 Implementation |
| * |
| *****************************************************************************/ |
| package org.eclipse.ptp.remotetools.internal.common; |
| |
| import org.eclipse.ptp.remotetools.core.IRemoteOperation; |
| import org.eclipse.ptp.remotetools.exception.CancelException; |
| import org.eclipse.ptp.remotetools.exception.RemoteConnectionException; |
| import org.eclipse.ptp.remotetools.internal.ssh.ExecutionManager; |
| |
| /** |
| * @author Richard Maciel, Daniel Felix Ferber |
| */ |
| public abstract class AbstractRemoteExecution implements IRemoteOperation { |
| /** |
| * The execution manager that created the execution. |
| */ |
| private ExecutionManager executionManager; |
| /** |
| * The execution was canceled by the manager. |
| */ |
| protected boolean cancelled; |
| /** |
| * The execution finished by itself. |
| */ |
| protected boolean finished; |
| |
| /** |
| * Default constructor. |
| * <p> |
| * It is protected because only the RemoteExecutionManager can instantiate |
| * it and pass itself as the parameters to the constructor. |
| * |
| * @param remExecManager |
| * @throws RemoteConnectionException |
| */ |
| public AbstractRemoteExecution(ExecutionManager executionManager) |
| throws RemoteConnectionException { |
| this.executionManager = executionManager; |
| this.cancelled = false; |
| this.finished = false; |
| } |
| |
| public final synchronized void cancel() { |
| notifyCancel(); |
| } |
| |
| public void close() { |
| } |
| |
| public ExecutionManager getExecutionManager() { |
| return executionManager; |
| } |
| |
| protected synchronized void notifyCancel() { |
| /* |
| * By default, no logic is implemented to cancel the execution. Only |
| * sets the cancel flag. Notifies all waiting thread that the execution |
| * was canceled. |
| */ |
| cancelled = true; |
| this.notifyAll(); |
| } |
| |
| protected synchronized void notifyFinish() { |
| /* |
| * By default, no logic is implemented to finish the execution. Notifies |
| * all waiting thread that the execution finished by itself. |
| */ |
| finished = true; |
| this.notifyAll(); |
| } |
| |
| public synchronized void waitForEndOfExecution() |
| throws RemoteConnectionException, CancelException { |
| /* |
| * Block until the execution finishes or is canceled. |
| */ |
| while (!finished && !cancelled) { |
| try { |
| this.wait(); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); // set current thread flag |
| // Ignore spurious interrupts |
| } |
| } |
| if (wasCanceled()) { |
| throw new CancelException(); |
| } |
| } |
| |
| public synchronized boolean wasCanceled() { |
| return cancelled; |
| } |
| |
| public synchronized boolean wasFinished() { |
| return finished; |
| } |
| } |