org.jboss.logmanager.handlers
Class QueueHandler

java.lang.Object
  java.util.logging.Handler
      org.jboss.logmanager.ExtHandler
          org.jboss.logmanager.handlers.QueueHandler

All Implemented Interfaces:

Closeable, Flushable, FlushableCloseable, Protectable

public class QueueHandler
extends ExtHandler

A queue handler which retains the last few messages logged. The handler can be used as-is to remember recent messages, or one or more handlers may be nested, which allows this handler to "replay" messages to the child handler(s) upon request.

Author:

David M. Lloyd

Field Summary

Fields inherited from class org.jboss.logmanager.ExtHandler

handlers, handlersUpdater

Constructor Summary

QueueHandler()
Construct a new instance with a default queue length.

QueueHandler(int limit)
Construct a new instance.

Method Summary

protected void	doPublish(ExtLogRecord record) Do the actual work of publication; the record will have been filtered already.
int	getLimit() Get the queue length limit.
ExtLogRecord[]	getQueue() Get a copy of the queue as it is at an exact moment in time.
String[]	getQueueAsStrings() Get a copy of the queue, rendering each record as a string.
void	publish(ExtLogRecord record) Publish an ExtLogRecord.
void	publish(LogRecord record)
void	replay() Replay the stored queue to the nested handlers.
void	setLimit(int limit) Set the queue length limit.

Methods inherited from class org.jboss.logmanager.ExtHandler

addHandler, checkAccess, checkAccess, clearHandlers, close, disableAccess, enableAccess, flush, getHandlers, isAutoFlush, isEnabled, protect, removeHandler, setAutoFlush, setEnabled, setEncoding, setErrorManager, setFilter, setFormatter, setHandlers, setLevel, unprotect

Methods inherited from class java.util.logging.Handler

getEncoding, getErrorManager, getFilter, getFormatter, getLevel, isLoggable, reportError

Methods inherited from class java.lang.Object

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

Constructor Detail

QueueHandler

public QueueHandler()

Construct a new instance with a default queue length.

QueueHandler

public QueueHandler(int limit)

Construct a new instance.

Parameters:

limit - the queue length to use

Method Detail

publish

public void publish(ExtLogRecord record)

Description copied from class: ExtHandler

Publish an ExtLogRecord.

The logging request was made initially to a Logger object, which initialized the LogRecord and forwarded it here.

The ExtHandler is responsible for formatting the message, when and if necessary. The formatting should include localization.

Overrides:

publish in class ExtHandler

Parameters:

record - the log record to publish

publish

public void publish(LogRecord record)

Description copied from class: ExtHandler

Overrides:

publish in class ExtHandler

doPublish

protected void doPublish(ExtLogRecord record)

Description copied from class: ExtHandler

Do the actual work of publication; the record will have been filtered already. The default implementation does nothing except to flush if the autoFlush property is set to true; if this behavior is to be preserved in a subclass then this method should be called after the record is physically written.

Overrides:

doPublish in class ExtHandler

Parameters:

record - the log record to publish

getLimit

public int getLimit()

Get the queue length limit. This is the number of messages that will be saved before old messages roll off of the queue.

Returns:

the queue length limit

setLimit

public void setLimit(int limit)

Set the queue length limit. This is the number of messages that will be saved before old messages roll off of the queue.

Parameters:

limit - the queue length limit

getQueue

public ExtLogRecord[] getQueue()

Get a copy of the queue as it is at an exact moment in time.

Returns:

the copy of the queue

getQueueAsStrings

public String[] getQueueAsStrings()

Get a copy of the queue, rendering each record as a string.

Returns:

the copy of the queue rendered as strings

replay

public void replay()

Replay the stored queue to the nested handlers.