JBOSS cache AS5和J2SE程序之间通信的一个例子
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JBOSS cache AS5和 J2SE程序之间通信的一个例子
想在 JBOSS AS5中利用 JBOSS Cache和 J2SE程序之间进行通信， google了一把，没有发现这样的例子。经过摸索后在 JBOSS AS5和 J2SE程序之间利用 JBOSS cache成功地进行了通信。
1、 JBOSS AS5中利用 JBOSS Cache
在 JBOSS AS5的手册中，讲解了如何通过 CacheManager在两个 JBOSS AS5之间通信，代码大致如下：
| … import javax.naming.InitialContext; import org.jboss.cache.Cache; import org.jboss.cache.Node; import org.jboss.cache.Fqn; import org.jboss.ha.cachemanager.CacheManager;
… InitialContext ctx = new InitialContext(); CacheManager cacheManager = (CacheManager )ctx.lookup( "java:CacheManager"); cacheManager.start();
Cache cache = cacheManager.getCache("my-test-cache", true);
if(cache.getCacheStatus().allowInvocations() ) { cache.start(); }
Fqn childFqn1 = Fqn.fromString("/child1"); Node node = cache.getRoot().addChild( childFqn1 ); … node.put( “test_key”, “test_value_123); …
|
上面的代码片段放入 J2EE程序中，在 $JBOSS_HOME/server/all/deploy/cluster/jboss-cache-manager.sar/jboss-cache-manager-jboss-beans.xml文件中添加一项 :
| <entry><key>my-test-cache</key> <value>
<bean name="MyTestCache" class="org.jboss.cache.config.Configuration">
<!-- Provides batching functionality for caches that don't want to interact with regular JTA Transactions --> <property name="transactionManagerLookupClass">org.jboss.cache.transaction.BatchModeTransactionManagerLookup</property>
<property name="clusterName">${jboss.partition.name:DefaultPartition}-MyTestCache</property> <property name="multiplexerStack">${jboss.default.jgroups.stack:udp}</property> <property name="fetchInMemoryState">true</property>
<property name="nodeLockingScheme">PESSIMISTIC</property> <property name="isolationLevel">REPEATABLE_READ</property> <property name="useLockStriping">false</property> <property name="cacheModeString">REPL_SYNC</property>
<property name="syncReplTimeout">17500</property> <property name="lockAcquisitionTimeout">15000</property> <property name="stateRetrievalTimeout">60000</property>
<property name="useRegionBasedMarshalling">false</property> <property name="inactiveOnStartup">false</property>
<!-- Disable asynchronous RPC marshalling/sending --> <property name="serializationExecutorPoolSize">0</property> <!-- We have no asynchronous notification listeners --> <property name="listenerAsyncPoolSize">0</property>
<property name="exposeManagementStatistics">true</property> </bean> </value> </entry> |
编辑完后存盘。
运行 jboss AS5:
$cd $JBOSS_HOME
$bin/run.sh –c all
发布包含上面代码的 J2EE程序。
2、 在 J2SE中利用 JBOSS Cache
J2SE中使用 JBOSS Cache的代码大概如下：
| … import org.jboss.cache.Cache; import org.jboss.cache.Fqn; import org.jboss.cache.Node; import org.jboss.ha.cachemanager.CacheManager; import org.jboss.ha.framework.server.JChannelFactory;
… String channelConfigName = "jgroups-channelfactory-stacks.xml"; JChannelFactory channelFactory = new JChannelFactory(); channelFactory.setMultiplexerConfig( channelConfigName, true ); channelFactory.start();
CacheManager cacheMgr = new CacheManager( "cache-configs.xml", channelFactory ); cacheMgr.start(); cache = cacheMgr.getCache( "my-test-cache", true ); cache.start();
Fqn childFqn1 = Fqn.fromString("/child1"); Node node = cache.getRoot().addChild( childFqn1 ); … String value =(String)node.get( “test_key”); …
|
将 jgroups-channelfactory-stacks.xml从 JBOSS AS5中拷贝到 J2SE中：
$cp $JBOSS_HOME/server/all/deploy/cluster/jgroups-channelfactory.sar/META-INF/ jgroups-channelfactory-stacks.xml .
将在 JBOSS AS5中配置的 ”my-test-cache”从 $JBOSS_HOME/server/all/deploy/cluster/jboss-cache-manager.sar/jboss-cache-manager-jboss-beans.xml文件中拷贝出来，进行格式变换，变成 jboss cache要求的格式。变换后， ”my-test-cache”的格式如下：
| <cache-configs> … <cache-config name="my-test-cache">
<!-- Provides batching functionality for caches that don't want to interact with regular JTA Transactions --> <attribute name="TransactionManagerLookupClass">org.jboss.cache.transaction.BatchModeTransactionManagerLookup</attribute>
<attribute name="clusterName">${jboss.partition.name:DefaultPartition}-MyTestCache</attribute> <attribute name="multiplexerStack">${jboss.default.jgroups.stack:udp}</attribute> <attribute name="FetchInMemoryState">true</attribute>
<attribute name="NodeLockingScheme">PESSIMISTIC</attribute> <attribute name="IsolationLevel">REPEATABLE_READ</attribute> <attribute name="UseLockStriping">false</attribute> <attribute name="CacheModeString">REPL_SYNC</attribute>
<attribute name="SyncReplTimeout">17500</attribute> <attribute name="LockAcquisitionTimeout">15000</attribute> <attribute name="StateRetrievalTimeout">60000</attribute>
<attribute name="UseRegionBasedMarshalling">false</attribute> <attribute name="InactiveOnStartup">false</attribute>
<!-- Disable asynchronous RPC marshalling/sending --> <attribute name="SerializationExecutorPoolSize">0</attribute> <!-- We have no asynchronous notification listeners --> <attribute name="ListenerAsyncPoolSize">0</attribute>
<attribute name="ExposeManagementStatistics">true</attribute> </cache-config> … </cache-configs> |
将此文件存为 cache-configs.xml。
将如下的 .jar文件从 JBOSS AS5中拷贝到 J2SE中：
commons-logging.jar
jboss-bootstrap.jar
jbosscache-core.jar
jbosscache-pojo.jar
jboss-common-core.jar
jbossha.jar
jboss-ha-server-api.jar
jboss-ha-server-cache-jbc.jar
jboss-ha-server-cache-spi.jar
jbossjta.jar
jbossjts.jar
jboss-logging-spi.jar
jboss-transaction-api.jar
jcip-annotations.jar
jgroups.jar
log4j.jar
然后对 J2SE程序进行编译并运行即可。这样 JBOSS AS5和 J2SE程序就可以通信了。
JBOSS AS5和 J2SE程序利用 JBOSS Cache通信的关键是利用 org.jboss.ha.cachemanager.CacheManager和 org.jboss.ha.framework.server.JchannelFactory而不是利用 JBOSS Cache中的 org.jboss.cache.DefaultCacheFactory
管理 Cache的创建工作。