Bug 165188 logging per report
Setting up a dedicated (birt) report server, which serves all our web apps, leads to a logging desaster. Birtegine logs all messages to one file. There's no info which rptdesign caused the logmessage or who (e.g. user) caused the logmessage. Retrieving who/which rpt caused some logmessage is not possible! There are two possible solutions: (a) prefixing each logmessage with a userdefineable message (task.setLogprefix("myprefix")) (b) set an outputstream for each task (task.setLoggingOutputStream(outputstream)) to split the huge logfile to many small pieces.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/EngineTask.java
}
	public void setReportRunnable( IReportRunnable runnable )
	{
		if ( runnable != null )
		{
			this.runnable = runnable;
			executionContext.setRunnable( runnable );
			
			
			executionContext.registerBeans( System.getProperties( ) );
			executionContext.registerBeans( runnable.getTestConfig( ) );
			
			
			executionContext.getConfigs( ).putAll( System.getProperties( ) );
			executionContext.getConfigs( ).putAll( runnable.getTestConfig( ) );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api2.IEngineTask#getReportRunnable()
	 */
	public IReportRunnable getReportRunnable( )
	{
		return runnable;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.IRenderTask#setRenderOption(org.eclipse.birt.report.engine.api.IRenderOption)