How to use

beginTask

method

in

org.eclipse.core.runtime.IProgressMonitor

@SuppressWarnings( "unchecked" )
private String[] doScan( IProgressMonitor monitor ) throws Exception {
 monitor.beginTask( BaseMessages.getString( PKG, "GetXMLDateLoopNodesImportProgressDialog.Task.ScanningFile",
   filename ), 1 );
   .beginTask( BaseMessages.getString( PKG, "GetXMLDateLoopNodesImportProgressDialog.Task.ReadingDocument" ), 1 );
 if ( monitor.isCanceled() ) {
  return null;
  monitor.beginTask( BaseMessages.getString( PKG, "GetXMLDateLoopNodesImportProgressDialog.Task.DocumentOpened" ),
    1 );
  monitor.worked( 1 );
  monitor.beginTask( BaseMessages.getString( PKG, "GetXMLDateLoopNodesImportProgressDialog.Task.ReadingNode" ), 1 );
 monitor.done();

public void run( IProgressMonitor monitor ) throws InvocationTargetException, InterruptedException {
 int size = transMeta.findNrPrevSteps( stepInfo );
 try {
  if ( before ) {
   monitor.beginTask( BaseMessages.getString(
    PKG, "SearchFieldsProgressDialog.Dialog.SearchInputFields.Message" ), size ); // Searching
                                           // for
                                           // input
                                           // fields...
   fields = transMeta.getPrevStepFields( stepInfo, new ProgressMonitorAdapter( monitor ) );
  } else {
   monitor.beginTask( BaseMessages.getString(
    PKG, "SearchFieldsProgressDialog.Dialog.SearchOutputFields.Message" ), size ); // Searching
                                            // for
                                            // output
                                            // fields...
   fields = transMeta.getStepFields( stepInfo, new ProgressMonitorAdapter( monitor ) );
  }
 } catch ( KettleStepException kse ) {
  throw new InvocationTargetException( kse, BaseMessages.getString(
   PKG, "SearchFieldsProgressDialog.Log.UnableToGetFields", stepInfo.toString(), kse.getMessage() ) );
 }
 monitor.done();
}

@SuppressWarnings( "unchecked" )
private RowMetaAndData[] doScan( IProgressMonitor monitor ) throws Exception {
 monitor.beginTask( BaseMessages.getString( PKG, "GetXMLDateLoopNodesImportProgressDialog.Task.ScanningFile",
   filename ), 1 );
   .beginTask( BaseMessages.getString( PKG, "GetXMLDateLoopNodesImportProgressDialog.Task.ReadingDocument" ), 1 );
 if ( monitor.isCanceled() ) {
  return null;
  monitor.beginTask( BaseMessages.getString( PKG, "GetXMLDateLoopNodesImportProgressDialog.Task.DocumentOpened" ),
    1 );
  monitor.worked( 1 );
  monitor.beginTask( BaseMessages.getString( PKG, "GetXMLDateLoopNodesImportProgressDialog.Task.ReadingNode" ), 1 );
 monitor.done();

private void doPreview( final IProgressMonitor progressMonitor, final boolean showErrorDialogs  ) {
 progressMonitor.beginTask(
  BaseMessages.getString( PKG, "TransPreviewProgressDialog.Monitor.BeginTask.Title" ), 100 );
  KettleLogStore.getAppender().getBuffer( trans.getLogChannel().getLogChannelId(), true ).toString();
 progressMonitor.done();

private String doScan( IProgressMonitor monitor, final boolean failOnParseError ) throws KettleException {
 if ( samples > 0 ) {
  monitor.beginTask( BaseMessages.getString( PKG, "TextFileCSVImportProgressDialog.Task.ScanningFile" ), samples
    + 1 );
 } else {
  monitor.beginTask( BaseMessages.getString( PKG, "TextFileCSVImportProgressDialog.Task.ScanningFile" ), 2 );
 monitor.done();

private String doScan( IProgressMonitor monitor, final boolean failOnParseError ) throws KettleException {
 if ( samples > 0 ) {
  monitor.beginTask(
   BaseMessages.getString( PKG, "TextFileCSVImportProgressDialog.Task.ScanningFile" ), samples + 1 );
 } else {
  monitor.beginTask( BaseMessages.getString( PKG, "TextFileCSVImportProgressDialog.Task.ScanningFile" ), 2 );
 monitor.done();

 monitor.beginTask( BaseMessages.getString( PKG, "Spoon.RipDB.Monitor.BuildingNewJob" ), tables.length );
 monitor.worked( 0 );
 JobEntryCopy previous = start;
 monitor.done();
} catch ( Exception e ) {
 new ErrorDialog( spoon.getShell(), "Error", "An unexpected error occurred!", e );

@Override
protected void clearProblems(IProgressMonitor monitor, IDocument document, IRegion region) throws CoreException {
  monitor.beginTask(Messages.ResourceMarkerMarkupValidator_clearingMarkers, 1);
  // nothing to do: we do all of this in the createProblems method
  monitor.done();
}

public Change createChange(IProgressMonitor pm) throws CoreException, OperationCanceledException {
  if (pm != null) {
    pm.beginTask("", 1); //$NON-NLS-1$
    pm.worked(1);
    pm.done();
  }
  return fChange;
}

protected IFile getOldFile(IProgressMonitor pm) throws OperationCanceledException {
  pm.beginTask("", 1); //$NON-NLS-1$
  try {
    return ResourcesPlugin.getWorkspace().getRoot().getFile(fPath);
  } finally {
    pm.done();
  }
}

/**
 * {@inheritDoc}
 */
@Override
public void doRefresh(IProgressMonitor monitor, IRootEditor rootEditor) {
  monitor.beginTask("Getting trace information..", IProgressMonitor.UNKNOWN);
  loadDataFromService();
  monitor.done();
}

@Override
public RefactoringStatus checkInitialConditions(IProgressMonitor pm) throws CoreException, OperationCanceledException {
  if (pm != null) {
    pm.beginTask("", 1); //$NON-NLS-1$
    pm.worked(1);
    pm.done();
  }
  return new RefactoringStatus();
}

private RefactoringStatus checkRenamings(IProgressMonitor pm) throws JavaModelException {
  try{
    pm.beginTask(RefactoringCoreMessages.ChangeSignatureRefactoring_checking_preconditions, 1);
    return checkParameterNamesInRippleMethods();
  } finally{
    pm.done();
  }
}

@Override
protected RefactoringStatus doCheckFinalConditions(IProgressMonitor pm, CheckConditionsContext context) throws CoreException {
  pm.beginTask("", 1); //$NON-NLS-1$
  try{
    return new RefactoringStatus();
  } finally{
    pm.done();
  }
}

protected RefactoringStatus doCheckFinalConditions(IProgressMonitor pm, CheckConditionsContext context) throws CoreException {
  pm.beginTask("", 1); //$NON-NLS-1$
  try{
    return new RefactoringStatus();
  } finally{
    pm.done();
  }        
}

@Override
public void initializeValidationData(IProgressMonitor pm) {
  if (pm == null)
    pm= new NullProgressMonitor();
  pm.beginTask("", 1); //$NON-NLS-1$
  try {
    fValidationState= BufferValidationState.create(fFile);
  } finally {
    pm.done();
  }
}

@Override
public void initializeValidationData(IProgressMonitor pm) {
  if (pm == null)
    pm= new NullProgressMonitor();
  pm.beginTask("", 1); //$NON-NLS-1$
  try {
    fValidationState= BufferValidationState.create(fFile);
  } finally {
    pm.done();
  }
}

@Override
public RefactoringStatus checkInitialConditions(IProgressMonitor pm) throws CoreException, OperationCanceledException {
  if (pm != null) {
    pm.beginTask("", 1); //$NON-NLS-1$
    pm.worked(1);
    pm.done();
  }
  return new RefactoringStatus();
}

private static SearchMatch[] getFieldReferencesIn(IJavaElement[] elements, WorkingCopyOwner owner, IProgressMonitor pm) throws JavaModelException {
  List<SearchMatch> referencedFields= new ArrayList<>();
  pm.beginTask("", elements.length); //$NON-NLS-1$
  for (int i = 0; i < elements.length; i++) {
    referencedFields.addAll(getFieldReferencesIn(elements[i], owner, new SubProgressMonitor(pm, 1)));
  }
  pm.done();
  return referencedFields.toArray(new SearchMatch[referencedFields.size()]);
}

private static SearchMatch[] getTypeReferencesIn(IJavaElement[] elements, WorkingCopyOwner owner, IProgressMonitor pm) throws JavaModelException {
  List<SearchMatch> referencedTypes= new ArrayList<>();
  pm.beginTask("", elements.length); //$NON-NLS-1$
  for (int i = 0; i < elements.length; i++) {
    referencedTypes.addAll(getTypeReferencesIn(elements[i], owner, new SubProgressMonitor(pm, 1)));
  }
  pm.done();
  return referencedTypes.toArray(new SearchMatch[referencedTypes.size()]);
}