Problem deploying Duke's bank app
leelon Mar 5, 2004 2:32 PMHello 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