de.esprit.common.log

Class LogChannelCache

java.lang.Object

de.esprit.common.log.LogChannelCache

public class LogChannelCache
extends java.lang.Object

This is a cache for keeping a set of LogChannels that can be accessed by name.

Coding examples

Here is a sample code that opens a LogChannel for the DBObject output. This channel is configured to report to three outputs (LogPrinter objects): the system-console, a log-file and a GUI log-frame. Note that each output can be configured individually with respect to the log-level and message formatting.

 // sample tracing for the DBO log channel
 LogChannel logCh = Log.getLogChannel("DBO");
 logCh.setLogLevel(DUMP);

 LogPrinterConsole logConsole = logCh.openConsole();
 logConsole.setLogLevel(ERROR);

 LogPrinterFile logFile = logCh.openLogFile(logDir);
 logFile.setLogLevel(VERBOSE);

 LogPrinterFrame logFrame = logCh.openLogFrame("DBO-Log");
 logFrame.setLogLevel(LOG_INFO);
 logFrame.registerForExit(this);

 logCh.logInfo(this, "");
 

Author:

Rainer Buesch

Constructor Summary

Constructors

Constructor and Description
LogChannelCache()

Method Summary

Methods

Modifier and Type	Method and Description
static void	close() Closes all cached LogChannels and removes them from the cache.
static void	closeLogChannel(java.lang.String channelName) Closes the named log channel by removing it from the cached list.
static LogChannel	getLogChannel(java.lang.String channelName) Opens a named channel for sending messages to.
static boolean	hasLogChannel(java.lang.String channelName) Tells whether a LogChannel with this name exists already.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LogChannelCache

public LogChannelCache()

Method Detail

getLogChannel

public static LogChannel getLogChannel(java.lang.String channelName)

Opens a named channel for sending messages to. if the channel doesn't exist yet it will be created and cached in an internal list for reusage.

hasLogChannel

public static boolean hasLogChannel(java.lang.String channelName)

Tells whether a LogChannel with this name exists already.

closeLogChannel

public static void closeLogChannel(java.lang.String channelName)

Closes the named log channel by removing it from the cached list. The underlying LogHandler is also closed and thus releases it's resources.

close

public static void close()

Closes all cached LogChannels and removes them from the cache.