1:47 a.m.
Hi,
I am building demo application to validate JBoss Cache with Hibernate and WebLogic
cluster.
I have choosen JBoss Cache to hold table data in form of OBJECT CACHE and QUERY CACHE. I
am new to JBoss Cache and facing few problems in configuring same.
I have already done the setup and everything seems working fine except some unexpected
error as mentioned below.
org.jboss.cache.ReplicationException: rsp=sender=192.168.102.71:1793, retval=null,
received=false, suspected=false
at org.jboss.cache.TreeCache.callRemoteMethods(TreeCache.java:3268)
at org.jboss.cache.TreeCache.callRemoteMethods(TreeCache.java:3215)
at org.jboss.cache.TreeCache.callRemoteMethods(TreeCache.java:3291)
....
I made few changes in xml as per below (Made it REPL_ASYNC, mcast_addr is not same in
other deployements with JBoss cache on same network), and have taken following approach to
test JBoss Cache.
a) Object Cache:-
Using Statistics: Cache entries return the number of entries loaded into cache.
SecondLevelCacheStatistics slcs =
session.getSessionFactory().getStatistics().getSecondLevelCacheStatistics(
SystemParameter.class.getName() );
Map cacheEntries = slcs.getEntries();
cacheEntries.length()
Manual Assumption: Database changes are not reflecting into the system till the timeout
configured in xml file.
b) Query Cache: Hibernate is not reflecting the query into command prompt when show_sql is
true.
Could you please let me know if there could be any expected problem?
Code - jboss-cache.xml
| <?xml version="1.0" encoding="UTF-8" ?>
| <server>
| <classpath codebase="./lib" archives="jboss-cache.jar,
jgroups.jar" />
|
| <!-- ====================================================================
-->
| <!-- Defines TreeCache configuration
-->
| <!-- ====================================================================
-->
| <mbean code="org.jboss.cache.TreeCache"
name="jboss.cache:service=TreeCache">
| <depends>jboss:service=Naming</depends>
| <depends>jboss:service=TransactionManager</depends>
|
|
| <!-- Configure the TransactionManager -->
| <attribute
name="TransactionManagerLookupClass">org.jboss.cache.GenericTransactionManagerLookup</attribute>
|
| <!--
| Node locking scheme :
| PESSIMISTIC (default)
| OPTIMISTIC
| -->
| <attribute name="NodeLockingScheme">PESSIMISTIC</attribute>
|
| <!--
| Node locking isolation level :
| SERIALIZABLE
| REPEATABLE_READ (default)
| READ_COMMITTED
| READ_UNCOMMITTED
| NONE
|
| (ignored if NodeLockingScheme is OPTIMISTIC)
| -->
| <attribute
name="IsolationLevel">REPEATABLE_READ</attribute>
|
| <!-- Valid modes are LOCAL
| REPL_ASYNC
| REPL_SYNC
| INVALIDATION_ASYNC
| INVALIDATION_SYNC
| -->
| <attribute name="CacheMode">REPL_ASYNC</attribute>
|
| <!-- Whether each interceptor should have an mbean
| registered to capture and display its statistics. -->
| <attribute name="UseInterceptorMbeans">true</attribute>
|
| <!-- Name of cluster. Needs to be the same for all clusters, in order
| to find each other -->
| <attribute name="ClusterName">hacluster</attribute>
|
| <attribute name="ClusterConfig">
| <config>
| <!-- UDP: if you have a multihomed machine,
| set the bind_addr attribute to the appropriate NIC IP address
| -->
| <!-- 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="228.2.2.2" 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" 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>
|
| <!-- 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">5000</attribute>
|
| <!-- Number of milliseconds to wait until all responses for a
| synchronous call have been received.
| -->
| <attribute name="SyncReplTimeout">10000</attribute>
|
| <!-- Max number of milliseconds to wait for a lock acquisition -->
| <attribute name="LockAcquisitionTimeout">15000</attribute>
|
| <!-- Name of the eviction policy class. -->
| <attribute
name="EvictionPolicyClass">org.jboss.cache.eviction.LRUPolicy</attribute>
|
| <!-- Specific eviction policy configurations. This is LRU -->
| <attribute name="EvictionPolicyConfig">
| <config>
| <attribute
name="wakeUpIntervalSeconds">43200</attribute>
| <!-- Cache wide default -->
| <region name="/_default_">
| <attribute name="maxNodes">50000</attribute>
| <attribute name="timeToLiveSeconds">43200</attribute>
| <attribute name="maxAgeSeconds">43200</attribute>
| </region>
| </config>
| </attribute>
| </mbean>
| </server>
|
|
Hibernate Configuration
<prop key="hibernate.cache.use_second_level_cache">true</prop>
| <prop key="hibernate.cache.use_query_cache">true</prop>
| <prop
key="hibernate.cache.provider_class">org.hibernate.cache.TreeCacheProvider</prop>
|
Datamodel hbm file
<cache usage="read-only"/>
Code for Query Cache
query = session.createQuery("FROM SystemParameter AS SP WHERE
SP.PARAMETER_NAME=:PARAMETER_NAME");
| query.setString("PARAMETER_NAME", parameterName);
| query.setCacheable(true);
| lstResults = query.list();
Code for Object Cache
SystemParameter systemParameter = (SystemParameter)session.get(SystemParameter.class,
parameterName);
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