Package dsto.dfc.logging

Framework for handling log messages.

See:
Description

Interface Summary

LogListener

Class Summary

FileLogger	Prints selected log events to a file.
Log	A basic application log.
LogEvent
LogFilter	A filter for LogEvent's.
LogMessageBuffer	Stores log messages emitted by the system log.
ServletLogger	Directs DFC log events to a servlet's logger.

Package dsto.dfc.logging Description

Framework for handling log messages. Use the Log class to issue log messages of various categories (Alarm, Warning, Trace, etc). Use LogMessageBuffer to store a set number of these log messages.

Examples

Emit messages to the log using either Log.add () or, more commonly, Log.info (), Log.warn (), Log.alarm (), etc. All the logging methods take a source object: this should be the object that is emitting the message (eg "this") - for static classes use ClassName.class (ie the Class for the object). eg to log an IO error

    try
    {
    } catch (IOException ex)
    {
      Log.alarm ("Failed to do some IO", this, ex);
    }
  

To send an info message

    Log.info ("Starting something", this);
  

To save log messages use a LogMessageBuffer.