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/ReportEngine.java
logger.log( Level.FINE, "ReportEngine created. EngineConfig: {0} ",
				config );
		this.helper = new ReportEngineHelper( this );
		setupScriptScope( );
	}
	/**
	 * set up engine logging
	 */
	private Logger intializeLogger( )
	{
		Logger logger = null;
		if ( config != null )
		{
			logger = config.getLogger( );
			if ( logger != null )
			{
				return logger;
			}
			String dest = (String) config.getLogDirectory( );
			Level level = config.getLogLevel( );
			if ( level == null )
			{
				level = Level.WARNING;
			}
			EngineLogger.startEngineLogging( dest, level );
		}
		if ( logger == null )
		{
			logger = Logger.getLogger( ReportEngine.class.getName( ) );
		}