BackgroundResourceRefresher.java :  » IDE-Eclipse » ui » org » eclipse » ui » externaltools » internal » program » launchConfigurations » Java Open Source

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/*******************************************************************************
 * Copyright (c) 2000, 2005 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.ui.externaltools.internal.program.launchConfigurations;


import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.debug.core.DebugEvent;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IDebugEventSetListener;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.model.IProcess;
import org.eclipse.debug.ui.RefreshTab;
import org.eclipse.ui.externaltools.internal.model.ExternalToolsPlugin;

/**
 * Refreshes resources as specified by a launch configuration, when 
 * an associated process terminates.
 */
public class BackgroundResourceRefresher implements IDebugEventSetListener  {

  private ILaunchConfiguration fConfiguration;
  private IProcess fProcess;
  
  public BackgroundResourceRefresher(ILaunchConfiguration configuration, IProcess process) {
    fConfiguration = configuration;
    fProcess = process;
  }
  
  /**
   * If the process has already terminated, resource refreshing is done
   * immediately in the current thread. Otherwise, refreshing is done when the
   * process terminates.
   */
  public void startBackgroundRefresh() {
    synchronized (fProcess) {
      if (fProcess.isTerminated()) {
        refresh();
      } else {
        DebugPlugin.getDefault().addDebugEventListener(this);
      }
    }
  }
  
  /* (non-Javadoc)
   * @see org.eclipse.debug.core.IDebugEventSetListener#handleDebugEvents(org.eclipse.debug.core.DebugEvent[])
   */
  public void handleDebugEvents(DebugEvent[] events) {
    for (int i = 0; i < events.length; i++) {
      DebugEvent event = events[i];
      if (event.getSource() == fProcess && event.getKind() == DebugEvent.TERMINATE) {
        DebugPlugin.getDefault().removeDebugEventListener(this);
        refresh();
        break;
      }
    }
  }
  
  /**
   * Submits a job to do the refresh
   */
  protected void refresh() {
    Job job= new Job(ExternalToolsProgramMessages.BackgroundResourceRefresher_0) {
      public IStatus run(IProgressMonitor monitor) {
        try {
          RefreshTab.refreshResources(fConfiguration, monitor);
        } catch (CoreException e) {
          ExternalToolsPlugin.getDefault().log(e);
          return e.getStatus();
        }  
        return Status.OK_STATUS;
      }
    };
    job.schedule();
  }
}
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