Bug 178164 Use IEngineTask.status constants and remove unnecessary status variables in EngineTask.
1)Remove following redundant variables in EngineTask used for status info. protected final int RUNNING_STATUS_START = 0; protected final int RUNNING_STATUS_RUNNING = 1; protected final int RUNNING_STATUS_STOP = 2; EngineTask already has access to constants declared in IEngineTask. Use those instead. 2)Remove the unused errorHandlingOption in EngineTask.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/EngineTask.java
protected void startRender( )
	{
		ReportDesignHandle reportDesign = executionContext.getDesign( );
		ReportScriptExecutor
				.handleBeforeRender( reportDesign, executionContext );
	}
	protected void closeRender( )
	{
		ReportDesignHandle reportDesign = executionContext.getDesign( );
		ReportScriptExecutor.handleAfterRender( reportDesign, executionContext );
	}
	
	public void setDataSource( IDocArchiveReader dataSource )
	{
		
		try
		{
			ReportDocumentReader document = new ReportDocumentReader( engine,
					dataSource, true );
			Map values = document.getParameterValues( );
			Map texts = document.getParameterDisplayTexts( );
			setParameterValues( values );
			setParameterDisplayTexts( texts );
			document.close( );
		}
		catch ( EngineException ex )
		{
			log.log( Level.WARNING,
					"failed to load the paremters in the data source", ex );
		}