Class EhBlockingCache

java.lang.Object

org.mybatis.caches.ehcache.AbstractEhcacheCache

org.mybatis.caches.ehcache.EhBlockingCache

All Implemented Interfaces:

org.apache.ibatis.cache.Cache

public class EhBlockingCache
extends AbstractEhcacheCache

Cache implementation that wraps Ehcache 2 with BlockingCache semantics.

BlockingCache acquires a per-key lock when a cache miss occurs so that only one thread computes the missing value while others block. This prevents cache-stampede on a cold or expired entry.

Author:

Iwao AVE!

Field Summary

Fields inherited from class AbstractEhcacheCache

cache, CACHE_MANAGER, id

Constructor Summary

Constructors

Constructor	Description
EhBlockingCache(String id)	Instantiates a new eh blocking cache.

Method Summary

Modifier and Type	Method	Description
protected void	rebuildCacheWith(net.sf.ehcache.config.CacheConfiguration newConfig)	Removes the existing cache from the CacheManager and registers a new one built from newConfig.
Object	removeObject(Object key)

Methods inherited from class AbstractEhcacheCache

clear, equals, getId, getObject, getReadWriteLock, getSize, hashCode, putObject, setMaxBytesLocalDisk, setMaxEntriesLocalDisk, setMaxEntriesLocalHeap, setMemoryStoreEvictionPolicy, setTimeToIdleSeconds, setTimeToLiveSeconds, toString, unlock

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

EhBlockingCache

public EhBlockingCache(String id)

Instantiates a new eh blocking cache.

Parameters:

id - the id

Method Details

removeObject

public Object removeObject(Object key)

Description copied from class: AbstractEhcacheCache

Specified by:

removeObject in interface org.apache.ibatis.cache.Cache

Overrides:

removeObject in class AbstractEhcacheCache

rebuildCacheWith

protected void rebuildCacheWith(net.sf.ehcache.config.CacheConfiguration newConfig)

Removes the existing cache from the CacheManager and registers a new one built from newConfig. Subclasses may override this method to apply additional decorators (e.g. BlockingCache).

Re-wraps the rebuilt cache in a BlockingCache after replacing it.

Overrides:

rebuildCacheWith in class AbstractEhcacheCache

Parameters:

newConfig - the configuration to use for the replacement cache