1 Reply Latest reply on Mar 8, 2004 4:07 AM by leelon

    Problem deploying Duke's bank app

    leelon Newbie

      Hello altogether!

      I'm on my way to establish a TreeCache (-AOP) instance for a clustered JBoss environment. Last weeks I came closely in touch with (standalone) TreeCache technology.

      Now, I'm trying to get this thing into JBoss.
      1.) I deployed a XML file cache-service.xml with following content:

      <?xml version="1.0" encoding="UTF-8"?>
      <server>
       <classpath codebase="./lib" archives="jboss-cache.jar, jgroups.jar"/>
       <mbean code="org.jboss.cache.TreeCache"
       name="jboss.cache:service=TreeCache">
       <depends>jboss:service=Naming</depends>
       <depends>jboss:service=TransactionManager</depends>
       <attribute name="TransactionManagerLookupClass">org.jboss.cache.JBossTransactionManagerLookup</attribute>
       <attribute name="IsolationLevel">REPEATABLE_READ</attribute>
       <attribute name="CacheMode">REPL_SYNC</attribute>
       <attribute name="ClusterName">TreeCache-Cluster</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 mcast_addr="228.1.2.3" mcast_port="45566"
       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"/>
       <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="false" down_thread="false"/>
       </config>
       </attribute>
       <attribute name="MaxCapacity">20000</attribute>
       <attribute name="InitialStateRetrievalTimeout">5000</attribute>
       <attribute name="SyncReplTimeout">10000</attribute>
       <attribute name="LockAcquisitionTimeout">15000</attribute>
       <attribute name="LockLeaseTimeout">60000</attribute>
       <attribute name="EvictionPolicyClass"></attribute>
       <attribute name="EvictionPolicyConfig">
       <config>
       <attribute name="wakeUpIntervalSeconds">5</attribute>
       <region name="/_default_">
       <attribute name="maxNodes">5000</attribute>
       <attribute name="timeToIdleSeconds">1000</attribute>
       </region>
       <region name="/org/jboss/data">
       <attribute name="maxNodes">5000</attribute>
       <attribute name="timeToIdleSeconds">1000</attribute>
       </region>
       <region name="/org/jboss/test/data">
       <attribute name="maxNodes">5</attribute>
       <attribute name="timeToIdleSeconds">4</attribute>
       </region>
       </config>
       </attribute>
       </mbean>
      </server>
      


      Then I created a stateless Session Bean with following signature:
      /**
       * @ejb.bean name="TreeCacheFacade"
       * jndi-name="TreeCacheFacadeBean"
       * type="Stateless"
       **/
      
      public abstract class TreeCacheFacadeBean implements SessionBean
      {
      
       private TreeCacheAop cache = null;
      
       /**
       * @ejb.interface-method
       * view-type="remote"
       **/
       public void readAllContainingData()
       {
       ...
       }
      
      
       /**
       * @ejb.interface-method
       * view-type="remote"
       **/
       public void startCache()
       {
       try
       {
       //Starting TreeCache...
       System.out.println("\tInitializing TreeCache instance...");
       cache = new TreeCacheAop();
       System.out.println(
       "\tConfiguring TreeCache instance with cache-service.xml file...");
       PropertyConfigurator c = new PropertyConfigurator();
       c.configure(
       cache,
       "..\\server\\default\\deploy\\cache-service.xml");
       System.out.println("\tStarting TreeCache service...");
       cache.start();
       }
       catch (Exception e)
       {
       System.out.println(
       "\n****************************************************************"
       + "\nStarting failed"
       + "\n****************************************************************");
       e.printStackTrace();
       }
       }
       /**
       * @ejb.interface-method
       * view-type="remote"
       **/
       public void stopCache()
       {
       try
       {
       //Starting TreeCache...
       System.out.println("\tInitializing TreeCache instance...");
       cache = new TreeCacheAop();
       System.out.println(
       "\tConfiguring TreeCache instance with cache-service.xml file...");
       PropertyConfigurator c = new PropertyConfigurator();
       c.configure(
       cache,
       "..\\server\\default\\deploy\\cache-service.xml");
       System.out.println("\tStarting TreeCache service...");
       cache.stop();
       }
       catch (Exception e)
       {
       System.out.println(
       "\n****************************************************************"
       + "\nStopping failed"
       + "\n****************************************************************");
       e.printStackTrace();
       }
       }
      }
      


      Say: Each time I work with the TreeCacheAOP instance, I instanciate it vie new Operator. Then I configure it with the suitable cache-service.xml (Now they must be the same, or not?) file.

      But when I tried to get some data out of it. There came a NullPointerException.
      What is the proper way of getting the TreeCacheAOP instance while in the JBoss Environment.

      Thanx
      Vic