sdsu.logging
Class LoggerImplementation
java.lang.Object
|
+--sdsu.logging.LoggerImplementation
- Direct Known Subclasses:
- NullLogger, SelectiveLogger
- public abstract class LoggerImplementation
- extends java.lang.Object
This is the abstract class for all logging classes in sdsu.logging.
It defines a system for logging usage of programs. The only reason
to use this class is to create a new logger implementation. To create a new
logger implementation you need to: implement the public static method
register() and the protected method processLogRequest( LoggerMessage ).
The register method needs to create an instance of the logger,
register it with the class Logger by calling Logger.register(),
and return the logger instance. The processLogRequest method
handles the actual processing of the message. You can overload
this method based on the type of message. Note that Logger calls
the method log( LoggerMessage ), which calls processLogRequest.
This level of indirection is used by SelectiveLogger to filter
log requests before they get to the actual logger.
The logging system is based on the logging pattern by
Neil Harrison in Pattern Languages of Program Design 3
Eds Martin, Riehle, Buschman, 1998, pp 277-289.
- Version:
- 1.0 18 January 1998
- Author:
- Roger Whitney
(whitney@cs.sdsu.edu)
- See Also:
LogMessage,
,
,
| Methods inherited from class java.lang.Object |
equals,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
LoggerImplementation
public LoggerImplementation()
register
public static LoggerImplementation register()
- All subclass must implement this method. The method should
create an instance, register it with the Logger class
by using Logger.register( ). Note the compiler
does not force you to implement this method, but still
do so.
log
public void log(LoggerMessage message)
- Add the LoggerMessage object to the log.
reset
public void reset()
- Resets logger. Suclasses define what this means.
Not normally part of a logging system. This will allow
log servers to rest log files for students that may not
have direct access to the log file.