TreeCache的使用

<?xml version="1.0" encoding="UTF-8"?>
<!-- ===================================================================== -->
<!--                                                                       -->
<!--  Sample TreeCache Service Configuration                               -->
<!--                                                                       -->
<!-- ===================================================================== -->
<server>
	<classpath codebase="../lib" archives="jboss-cache.jar, jgroups.jar"/>
	<!-- ==================================================================== -->
	<!-- Defines TreeCache configuration                                      -->
	<!-- ==================================================================== -->
	<mbean code="org.jboss.cache.TreeCache" name="jboss.cache:service=DAOCache">
		<depends>jboss:service=Naming</depends>
		<depends>jboss:service=TransactionManager</depends>
		<!--
		Configure the TransactionManager
		-->
		<attribute name="TransactionManagerLookupClass">
			com.test.transaction.JotmTransactionManagerLookup</attribute>
		<!--
		Node locking scheme:
		OPTIMISTIC
		PESSIMISTIC (default)
		-->
		<attribute name="NodeLockingScheme">PESSIMISTIC</attribute>
		<!--
		Isolation level : SERIALIZABLE
		REPEATABLE_READ (default)
		READ_COMMITTED
		READ_UNCOMMITTED
		NONE
		-->
		<attribute name="IsolationLevel">REPEATABLE_READ</attribute>
		<!--
		Valid modes are LOCAL
		REPL_ASYNC
		REPL_SYNC
		INVALIDATION_ASYNC
		INVALIDATION_SYNC
		-->
		<attribute name="CacheMode">REPL_ASYNC</attribute>
		<!--
		Just used for async repl: use a replication queue
		-->
		<attribute name="UseReplQueue">false</attribute>
		<!--
		Replication interval for replication queue (in ms)
		-->
		<attribute name="ReplQueueInterval">0</attribute>
		<!--
		Max number of elements which trigger replication
		-->
		<attribute name="ReplQueueMaxElements">0</attribute>
		<!-- Name of cluster. Needs to be the same for all clusters, in order
		to find each other
		-->
		<attribute name="ClusterName">Product-Cache</attribute>
		<!-- JGroups protocol stack properties. Can also be a URL,
		e.g. file:/home/bela/default.xml
		<attribute name="ClusterProperties"></attribute>
		-->
		<attribute name="ClusterConfig">
			<config>
				<!-- UDP: if you have a multihomed machine,
				set the bind_addr attribute to the appropriate NIC IP address, e.g bind_addr="192.168.0.2"
				-->
				<!-- UDP: On Windows machines, because of the media sense feature
				being broken with multicast (even after disabling media sense)
				set the loopback attribute to true -->
				<UDP mcast_addr="192.168.0.2" mcast_port="48862" ip_ttl="64"
					ip_mcast="true" mcast_send_buf_size="150000"
					mcast_recv_buf_size="80000" ucast_send_buf_size="150000"
					ucast_recv_buf_size="80000" loopback="false"/>
				<PING timeout="2000" num_initial_members="3" up_thread="false"
					down_thread="false"/>
				<MERGE2 min_interval="10000" max_interval="20000"/>
				
				
				<!--        <FD shun="true" up_thread="true" down_thread="true" />-->
				<FD_SOCK/>
				<VERIFY_SUSPECT timeout="1500" up_thread="false"
					down_thread="false"/>
				<pbcast.NAKACK gc_lag="50" retransmit_timeout="600,1200,2400,4800"
					max_xmit_size="8192" up_thread="false" down_thread="false"/>
				<UNICAST timeout="600,1200,2400" window_size="100"
					min_threshold="10" down_thread="false"/>
				<pbcast.STABLE desired_avg_gossip="20000" up_thread="false"
					down_thread="false"/>
				<FRAG frag_size="8192" down_thread="false" up_thread="false"/>
				<pbcast.GMS join_timeout="5000" join_retry_timeout="2000"
					shun="true" print_local_addr="true"/>
				<pbcast.STATE_TRANSFER up_thread="true" down_thread="true"/>
			</config>
		</attribute>
		<!--
		Whether or not to fetch state on joining a cluster
		NOTE this used to be called FetchStateOnStartup and has been renamed to be more descriptive.
		-->
		<attribute name="FetchInMemoryState">true</attribute>
		<!--
		The max amount of time (in milliseconds) we wait until the
		initial state (ie. the contents of the cache) are retrieved from
		existing members in a clustered environment
		-->
		<attribute name="InitialStateRetrievalTimeout">15000</attribute>
		<!--
		Number of milliseconds to wait until all responses for a
		synchronous call have been received.
		-->
		<attribute name="SyncReplTimeout">15000</attribute>
		<!-- Max number of milliseconds to wait for a lock acquisition -->
		<attribute name="LockAcquisitionTimeout">1000</attribute>
		<!-- Name of the eviction policy class. -->
		<attribute name="EvictionPolicyClass"/>
		<!--
		Indicate whether to use marshalling or not. Set this to true if you are running under a scoped
		class loader, e.g., inside an application server. Default is "false".
		-->
		<attribute name="UseMarshalling">false</attribute>
	</mbean>
	<!--  Uncomment to get a graphical view of the TreeCache MBean above -->
	<!--   <mbean code="org.jboss.cache.TreeCacheView" name="jboss.cache:service=TreeCacheView">-->
	<!--      <depends>jboss.cache:service=TreeCache</depends>-->
	<!--      <attribute name="CacheService">jboss.cache:service=TreeCache</attribute>-->
	<!--   </mbean>-->
</server>

    public static final String PRODUCT_NODE = "/Test/Product";
    /*
     * 初始化缓存
     */
    private boolean initCache()
    {
        try
        {
            treeCache = new TreeCache();
            org.jboss.cache.PropertyConfigurator config = new org.jboss.cache.PropertyConfigurator();
            config.configure(treeCache, "conf/cache.xml");
            treeCache.start();
            treeCache.put(PRODUCT_NODE, new HashMap());// 创建节点
 
        logger.info("缓存系统初始化成功!");
        }
        catch (Exception e)
        {
            logger.error("初始化缓存失败:" + e.getMessage());
 
            return false;
        }
 
        return true;
    }

    public void addElement(Object key, Object value) throws Exception
    {
        treeCache.put(PRODUCT_NODE, key, value);
    }

    public Object getElement(Object key) throws Exception
    {
        return treeCache.get(PRODUCT_NODE, key);
    }

    public Object removeElement(Object key) throws Exception
    {
        return treeCache.remove(PRODUCT_NODE, key);
    }

    public booleanexistElement(Object key) throws Exception
    {
        return treeCache.exists(PRODUCT_NODE, key);
    }