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 setParameterDisplayTexts( Map params )
	{
		Iterator iterator = params.entrySet( ).iterator( );
		while ( iterator.hasNext( ) )
		{
			Map.Entry entry = (Map.Entry) iterator.next( );
			String name = (String) entry.getKey( );
			String text = (String) entry.getValue( );
			setParameterDisplayText( name, text );
		}
	}
	public void setParameterDisplayText( String name, String displayText )
	{
		parameterChanged = true;
		Object parameter = inputValues.get( name );
		if ( parameter != null )
		{
			assert parameter instanceof ParameterAttribute;
			( (ParameterAttribute) parameter ).setDisplayText( displayText );
		}
		else
		{
			inputValues.put( name, new ParameterAttribute( null, displayText ) );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.IEngineTask#cancel()