optimistic cache locking
edavis Feb 1, 2007 8:17 AMHi, 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?