org.oddjob.logging.cache
Class LogArchiveImpl

java.lang.Object
  org.oddjob.logging.cache.LogArchiveImpl

All Implemented Interfaces:

LogArchive, LogEventSink

public class LogArchiveImpl
extends Object
implements LogArchive, LogEventSink

A log archive. This archives events and supports listeners.

Author:

Rob Gordon

Constructor Summary

LogArchiveImpl(String archive, int maxHistory)
Constructor.

Method Summary

void	addEvent(LogLevel level, String line) Add an event to this archive.
void	addListener(LogListener l, LogLevel level, long last, int history) Add a listener.
String	getArchive() Get the archive name.
long	getLastMessageNumber() Get the last message number in this archive.
int	getMaxHistory() Get the naximum number archive history lines supported.
boolean	removeListener(LogListener l) Remove a listener.
LogEvent[]	retrieveEvents(long from, int max) Retrieve events from the archive.

Methods inherited from class java.lang.Object

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

Constructor Detail

LogArchiveImpl

public LogArchiveImpl(String archive,
                      int maxHistory)

Constructor.

Parameters:

maxHistory - The maximum history lines.

Method Detail

getLastMessageNumber

public long getLastMessageNumber()

Get the last message number in this archive.

Specified by:

getLastMessageNumber in interface LogArchive

Returns:

The last message number.

addEvent

public void addEvent(LogLevel level,
                     String line)

Add an event to this archive.

Specified by:

addEvent in interface LogEventSink

Parameters:

level - The level.

line - The message.

retrieveEvents

public LogEvent[] retrieveEvents(long from,
                                 int max)

Retrieve events from the archive. The most recent events are retrieved first.

Specified by:

retrieveEvents in interface LogArchive

Parameters:

from - From message number

max - The maximum number to retreive.

Returns:

The events.

addListener

public void addListener(LogListener l,
                        LogLevel level,
                        long last,
                        int history)

Add a listener.

Specified by:

addListener in interface LogArchive

Parameters:

l - The listener.

level - The level.

last - The last message number this listener requires.

history - The maximum lines this listener requires.

removeListener

public boolean removeListener(LogListener l)

Remove a listener.

Specified by:

removeListener in interface LogArchive

Parameters:

l - The listener.

getArchive

public String getArchive()

Get the archive name.

Specified by:

getArchive in interface LogArchive

Returns:

The archive name.

getMaxHistory

public int getMaxHistory()

Get the naximum number archive history lines supported.

Specified by:

getMaxHistory in interface LogArchive

Returns:

The number of lines.