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
else if ( DesignChoiceConstants.PARAM_TYPE_INTEGER.equals( type ) )
			{
				return DataTypeUtil.toInteger( value );
			}
			return value;
		}
		catch ( BirtException e )
		{
			log.log( Level.SEVERE, e.getLocalizedMessage( ), e );
		}
		return null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api2.IRunAndRenderTask#validateParameters()
	 */
	public boolean validateParameters( )
	{
		if ( runnable == null )
		{
			return false;
		}
		
		usingParameterValues( );
		if ( log.isLoggable( Level.FINE ) )
		{
			loggerParamters( );
		}