org.olat.system.coordinate.cache.singlevm

类 CacheWrapperImpl

java.lang.Object

org.olat.system.coordinate.cache.singlevm.CacheWrapperImpl

所有已实现的接口:

CacheWrapper

直接已知子类:

ClusterCacheWrapperImpl

public class CacheWrapperImpl
extends java.lang.Object
implements CacheWrapper

Description:
this class is threadsafe. this is the singleVM implementation of the cachewrapper. it uses an ehcache as its internal cache.

Initial Date: 03.10.2007

作者:

Felix Jost, http://www.goodsolutions.ch

方法概要

方法

限定符和类型	方法和说明
java.io.Serializable	get(java.lang.String key)
CacheWrapper	getOrCreateChildCacheWrapper(OLATResourceable ores) this method is thread safe. creates a child cachewrapper that represents the cachewrapper for the given olatresourceable within this parent cachewrapper(the 'this' object)
void	put(java.lang.String key, java.io.Serializable value) use this put whenever you just fill up a cache from data which is already on the db or the filesystem. e.g. use it when you simply load some properties again into cache. e.g.
void	remove(java.lang.String key) removes a value from the cache. this method is thread-safe
void	update(java.lang.String key, java.io.Serializable value) o_clusterREVIEW :pb review references puts a value in the cache. this method is thread-safe Use this method if you generate new data (or change existing data) that cannot be known to other nodes yet.
void	updateMulti(java.lang.String[] keys, java.io.Serializable[] values) puts several values at once into the cache. same as repeatably calling put(key, value), but more efficient. please use in favor of put if applicable.

从类继承的方法 java.lang.Object

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

方法详细资料

getOrCreateChildCacheWrapper

public CacheWrapper getOrCreateChildCacheWrapper(OLATResourceable ores)

从接口复制的说明: CacheWrapper

this method is thread safe. creates a child cachewrapper that represents the cachewrapper for the given olatresourceable within this parent cachewrapper(the 'this' object)

指定者:

getOrCreateChildCacheWrapper 在接口中 CacheWrapper

参数:

ores - the olat resourceable

返回:

the cachewrapper

get

public java.io.Serializable get(java.lang.String key)

指定者:

get 在接口中 CacheWrapper

参数:

key - the cache for the cache entry

返回:

the cache entry or null when the element has expired, never been put into yet, or removed due to max-size, or a put in a different cluster node which led to an invalidate message

remove

public void remove(java.lang.String key)

从接口复制的说明: CacheWrapper

removes a value from the cache. this method is thread-safe

指定者:

remove 在接口中 CacheWrapper

update

public void update(java.lang.String key,
          java.io.Serializable value)

从接口复制的说明: CacheWrapper

o_clusterREVIEW :pb review references puts a value in the cache. this method is thread-safe
Use this method if you generate new data (or change existing data) that cannot be known to other nodes yet.

指定者:

update 在接口中 CacheWrapper

put

public void put(java.lang.String key,
       java.io.Serializable value)

从接口复制的说明: CacheWrapper

use this put whenever you just fill up a cache from data which is already on the db or the filesystem. e.g. use it when you simply load some properties again into cache. e.g.

                CacheWrapper cw = aCache.getOrCreateChildCacheWrapper(ores);
                synchronized(cw) {
                           String data = (String) cw.get(FULLUSERSET);
                        if (data == null) {
                                // cache entry has expired or has never been stored yet into the cache.
                                // or has been invalidated in cluster mode
                                data = loadDataFromDiskWeDidNotChangeAnythingButSimplyNeedTheDataAgain(...);
                                cw.putSilent(FULLUSERSET, data);
                        }
                        return data;
                }
 

指定者:

put 在接口中 CacheWrapper

updateMulti

public void updateMulti(java.lang.String[] keys,
               java.io.Serializable[] values)

从接口复制的说明: CacheWrapper

puts several values at once into the cache. same as repeatably calling put(key, value), but more efficient. please use in favor of put if applicable.

指定者:

updateMulti 在接口中 CacheWrapper

参数:

keys - the array of keys

values - the array of values