Examples of org.eclipse.core.runtime.OperationCanceledException

org.eclipse.core.runtime.OperationCanceledException
This exception is thrown to blow out of a long-running method when the user cancels it.
This class can be used without OSGi running.
This class is not intended to be subclassed by clients but may be instantiated.

  return false;
}
protected void worked(IProgressMonitor monitor, int work) {
  if (monitor != null) {
    if (monitor.isCanceled()) {
      throw new OperationCanceledException();
    } else {
      monitor.worked(work);
    }
  }
}

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    pathBuffer.append('/');
  }
  String packPath= this.getElementName().replace('.', '/');
  pathBuffer.append(packPath).append('/').append(JavadocConstants.PACKAGE_FILE_NAME);
  
  if (monitor != null && monitor.isCanceled()) throw new OperationCanceledException();
  final String contents = getURLContents(String.valueOf(pathBuffer));
  if (monitor != null && monitor.isCanceled()) throw new OperationCanceledException();
  if (contents == null) throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.CANNOT_RETRIEVE_ATTACHED_JAVADOC, this));
  synchronized (projectInfo.javadocCache) {
    projectInfo.javadocCache.put(this, contents);
  }
  return contents;

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  }
  protected void worked(IProgressMonitor monitor, int work) {
    if (monitor != null) {
      if (monitor.isCanceled()) {
        throw new OperationCanceledException();
      } else {
        monitor.worked(work);
      }
    }
  }

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      // Get document path access restriction from java search scope
      // Note that requestor has to verify if needed whether the document violates the access restriction or not
      AccessRuleSet access = javaSearchScope.getAccessRuleSet(relativePath, index.containerPath);
      if (access != JavaSearchScope.NOT_ENCLOSED) { // scope encloses the path
        if (!requestor.acceptIndexMatch(documentPath, this, participant, access)) 
          throw new OperationCanceledException();
      }
    } else if (scope.encloses(documentPath)) {
      if (!requestor.acceptIndexMatch(documentPath, this, participant, null)) 
        throw new OperationCanceledException();
    }
  }

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    // Get document path access restriction from java search scope
    // Note that requestor has to verify if needed whether the document violates the access restriction or not
    AccessRuleSet access = javaSearchScope.getAccessRuleSet(relativePath, index.containerPath);
    if (access != JavaSearchScope.NOT_ENCLOSED) { // scope encloses the path
      if (!requestor.acceptIndexMatch(documentPath, this, participant, access)) 
        throw new OperationCanceledException();
    }
  } else if (scope.encloses(documentPath)) {
    if (!requestor.acceptIndexMatch(documentPath, this, participant, null)) 
      throw new OperationCanceledException();
  }
}

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  }
  
  // open the parent if necessary
  openParent(info, newElements, monitor);
  if (monitor != null && monitor.isCanceled()) 
    throw new OperationCanceledException();


   // puts the info before building the structure so that questions to the handle behave as if the element existed
   // (case of compilation units becoming working copies)
  newElements.put(this, info);

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          case IJob.CancelIfNotReady :
            if (VERBOSE)
              Util.verbose("-> NOT READY - cancelling - " + searchJob); //$NON-NLS-1$
            if (VERBOSE)
              Util.verbose("CANCELED concurrent job - " + searchJob); //$NON-NLS-1$
            throw new OperationCanceledException();
  
          case IJob.WaitUntilReady :
            IProgressMonitor subProgress = null;
            try {
              int totalWork = 1000;
              if (progress != null) {
                subProgress = new SubProgressMonitor(progress, concurrentJobWork * 8 / 10);
                subProgress.beginTask("", totalWork); //$NON-NLS-1$
                concurrentJobWork = concurrentJobWork * 2 / 10;
              }
              // use local variable to avoid potential NPE (see bug 20435 NPE when searching java method
              // and bug 42760 NullPointerException in JobManager when searching)
              Thread t = this.processingThread;
              int originalPriority = t == null ? -1 : t.getPriority();
              try {
                if (t != null)
                  t.setPriority(Thread.currentThread().getPriority());
                synchronized(this) {
                  this.awaitingClients++;
                }
                IJob previousJob = null;
                int awaitingJobsCount;
                int lastJobsCount = totalWork;
                float lastWorked = 0;
                float totalWorked = 0;
                while ((awaitingJobsCount = awaitingJobsCount()) > 0) {
                  if (subProgress != null && subProgress.isCanceled())
                    throw new OperationCanceledException();
                  IJob currentJob = currentJob();
                  // currentJob can be null when jobs have been added to the queue but job manager is not enabled
                  if (currentJob != null && currentJob != previousJob) {
                    if (VERBOSE)
                      Util.verbose("-> NOT READY - waiting until ready - " + searchJob);//$NON-NLS-1$

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public void ensureReadyToRun() {
  if (!this.areIndexesReady)
    getIndexes(null/*progress*/); // may trigger some index recreation
}
public boolean execute(IProgressMonitor progressMonitor) {
  if (progressMonitor != null && progressMonitor.isCanceled()) throw new OperationCanceledException();


  boolean isComplete = COMPLETE;
  executionTime = 0;
  Index[] indexes = getIndexes(progressMonitor);
  try {
    int max = indexes.length;
    if (progressMonitor != null)
      progressMonitor.beginTask("", max); //$NON-NLS-1$
    for (int i = 0; i < max; i++) {
      isComplete &= search(indexes[i], progressMonitor);
      if (progressMonitor != null) {
        if (progressMonitor.isCanceled()) throw new OperationCanceledException();
        progressMonitor.worked(1);
      }
    }
    if (JobManager.VERBOSE)
      Util.verbose("-> execution time: " + executionTime + "ms - " + this);//$NON-NLS-1$//$NON-NLS-2$

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  int length = indexLocations.length;
  Index[] indexes = new Index[length];
  int count = 0;
  IndexManager indexManager = JavaModelManager.getJavaModelManager().getIndexManager();
  for (int i = 0; i < length; i++) {
    if (progressMonitor != null && progressMonitor.isCanceled()) throw new OperationCanceledException();
    // may trigger some index recreation work
    IPath indexLocation = indexLocations[i];
    Index index = indexManager.getIndex(indexLocation);
    if (index == null) {
      // only need containerPath if the index must be built

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    System.arraycopy(indexes, 0, indexes=new Index[count], 0, count);
  return indexes;
}  
public boolean search(Index index, IProgressMonitor progressMonitor) {
  if (index == null) return COMPLETE;
  if (progressMonitor != null && progressMonitor.isCanceled()) throw new OperationCanceledException();


  ReadWriteMonitor monitor = index.monitor;
  if (monitor == null) return COMPLETE; // index got deleted since acquired
  try {
    monitor.enterRead(); // ask permission to read

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