com.jcorporate.expresso.core.cache
Class CacheCleaner

java.lang.Object
  java.lang.Thread
      com.jcorporate.expresso.core.cache.CacheCleaner

All Implemented Interfaces:

Runnable

public class CacheCleaner

extends Thread

This thread is initialized by CacheManager and slowly iterates through the Caches clearing out expired items. It often is given a lower thread priority so it doesn't take away from the app server during high use times.

By using this thread, we save significant memory by removing expired items before they are accessed again.

Typical Usage:

 CacheCleaner cacheCleaner = new CacheCleaner();
 cacheCleaner.registerCacheSystem(defaultContextCacheSystem);
 cacheCleaner.start();
 .....
 .....
 //To shut down.  May take a while.
 cacheCleaner.interrupt();
 cacheCleaner.join();

 

Version:

$Revision: 1.6 $ on $Date: 2003/12/13 23:39:52 $

Author:

Michael Rimov

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

protected

CacheCleaner()

Method Summary

void	interrupt()
static void	main(String[] args)
void	registerCacheSystem(CacheSystem newCache) Register a cache system for iteration.
void	run() The cache cleaner run method iterates through all the cache systems installed in the system and forces the removal of any items that have expired.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheCleaner

protected CacheCleaner()

Method Detail

main

public static void main(String[] args)

registerCacheSystem

public void registerCacheSystem(CacheSystem newCache)

Register a cache system for iteration. During a pass of the cache, the CacheCleaner will iterate all registered CacheSystems

Parameters:

newCache - the CacheSystem instance to be cleaning.

run

public void run()

The cache cleaner run method iterates through all the cache systems installed in the system and forces the removal of any items that have expired. It automatically runs every 30 seconds.

interrupt

public void interrupt()