Hibernate使用WebSphere分布式缓存(DistributedMap)的实现
约定
本文的实现环境是
hibernate 3.3.1
WebSphere 6.1.0.21
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其他版本应该可以有相同或类似路径和实现方式(具体请查看其用户手册）
具体步骤登陆控制台????? http://serverIP:9060/ibm/console?
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?控制台路径：????? 资源 ==> 高速缓存实例 ==> 对象高速缓存实例
?新建对象缓存?????????????? 名称： HibernateCache
?????????????? JNDI名称： services/cache/hibernate
???????????????高速缓存大小： 20000(根据需要而定）
?????????????? 缺省优先级别：1
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应用并保存到主配置创建hibernate 的Cache实现类
package com.achievo.framework.cache;import java.util.Collections;import java.util.HashMap;import java.util.Map;import org.hibernate.cache.Cache;import org.hibernate.cache.CacheException;import org.hibernate.cache.Timestamper;import com.ibm.websphere.cache.DistributedMap;/* * @author xhm(hyamine) */public class AchievoCache implements Cache {private final DistributedMap distMap;private final String regionName;public AchievoCache(DistributedMap distMap,String regionName) {this.distMap = distMap;this.regionName = regionName;}public void clear() throws CacheException {distMap.clear();}public void destroy() throws CacheException {}public Object get(Object key) throws CacheException {return distMap.get(key);}public long getElementCountInMemory() {return distMap.size();}public long getElementCountOnDisk() {return 0;}public String getRegionName() {return regionName;}public long getSizeInMemory() {return -1;}public int getTimeout() {return Timestamper.ONE_MS * 60000; //ie. 60 seconds}public void lock(Object key) throws CacheException {}public long nextTimestamp() {return Timestamper.next();}public void put(Object key, Object value) throws CacheException {distMap.put(key, value);}public Object read(Object key) throws CacheException {return distMap.get(key);}public void remove(Object key) throws CacheException {distMap.remove(key);}public Map toMap() {return Collections.unmodifiableMap(distMap);}public void unlock(Object key) throws CacheException {}public void update(Object key, Object value) throws CacheException {put(key, value);}public String toString() {return "DistributedMap(" + regionName + ')';}}?
创建hibernate的CacheProvider实现类package com.achievo.framework.cache;import java.util.Properties;import javax.naming.InitialContext;import javax.naming.NamingException;import org.hibernate.cache.Cache;import org.hibernate.cache.CacheException;import org.hibernate.cache.CacheProvider;import org.hibernate.cache.Timestamper;import com.ibm.websphere.cache.DistributedMap;/* * @author xhm(hyamine) */public class AchievoCacheProvider implements CacheProvider{private static DistributedMap distMap;public Cache buildCache(String regionName, Properties properties)throws CacheException {if(distMap == null) {try {distMap = (DistributedMap)new InitialContext().lookup("java:comp/env/cache/hibernate");} catch (NamingException e) {e.printStackTrace();throw new CacheException(e);}}return new AchievoCache(distMap,regionName);}public boolean isMinimalPutsEnabledByDefault() {return false;}public long nextTimestamp() {return Timestamper.next();}public void start(Properties properties) throws CacheException {}public void stop() {}}?hibernate缓存配置 hibernate.cache.use_second_level_cache ==> true
hibernate.cache.provider_class ==> com.achievo.framework.cache.AchievoCacheProvider
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资源引用???????????? ??? ibm-web-bnd.xmi
<?xml version="1.0" encoding="UTF-8"?><webappbnd:WebAppBinding xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:webappbnd="webappbnd.xmi" xmi:id="WebAppBinding_1237946146690" virtualHostName="default_host"> <webapp href="WEB-INF/web.xml#WebApp_1237946146690"/> <resRefBindings xmi:id="ResourceRefBinding_1238122581168" jndiName="services/cache/hibernate"> <bindingResourceRef href="WEB-INF/web.xml#ResourceRef_1238122581168"/> </resRefBindings></webappbnd:WebAppBinding>
???????????????? web.xml
<resource-ref id="ResourceRef_1238122581168"> <res-ref-name>cache/hibernate</res-ref-name> <res-type>com.ibm.websphere.cache.DistributedMap</res-type> <res-auth>Container</res-auth> <res-sharing-scope>Shareable</res-sharing-scope></resource-ref>
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参考文献?
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