[jboss-user] [JBossCache] - optimistic cache locking

[edavis]

Hi, im using jboss4.0.5.GA and if im not wrong it has hibernate 3.2 wich has optimistic cache locking, how do I enable it?

For example my ejb3-cache-service.xml is

  | <?xml version="1.0" encoding="UTF-8"?>
  | <server>
  |   <mbean code="org.jboss.cache.TreeCache" name="jboss.cache:service=EJB3EntityTreeCache">
  |     <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">EJB3-entity-cache</attribute>
  |     <attribute name="ClusterConfig">
  |       <config>
  |         <UDP mcast_addr="${jboss.partition.udpGroup:228.1.2.3}" mcast_port="43333" ip_ttl="${jgroups.mcast.ip_ttl:2}" 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_SOCK down_thread="false" up_thread="false"/>
  |         <FD shun="true" up_thread="false" down_thread="false"
  |            timeout="20000" max_tries="5"/>
  |         <VERIFY_SUSPECT timeout="1500" up_thread="false" down_thread="false" />
  |         <pbcast.NAKACK gc_lag="50" max_xmit_size="8192" retransmit_timeout="600,1200,2400,4800" 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="InitialStateRetrievalTimeout">5000</attribute>
  |     <attribute name="SyncReplTimeout">10000</attribute>
  |     <attribute name="LockAcquisitionTimeout">15000</attribute>
  |     <attribute name="EvictionPolicyClass">org.jboss.cache.eviction.LRUPolicy</attribute>
  |     <attribute name="EvictionPolicyConfig">
  |       <config>
  |         <attribute name="wakeUpIntervalSeconds">5</attribute>
  |         <region name="/_default_">
  |          <attribute name="maxNodes">5000</attribute>
  |          <attribute name="timeToLiveSeconds">1000</attribute>
  |        </region>
  |       </config>
  |     </attribute>
  |   </mbean>
  | </server>
  | 

Which is using pessimistic cache locking, whats the parameter to change? ive searched lots of manuals and configuration tutorial but no luck so far.

Also, if I change it to optimistic, do I need to do anything else in the code? do  I need to perform evictions by hand?

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