1 Reply Latest reply on Mar 19, 2008 1:53 PM by Tom Goring

    How to do the JbossCache

    Thiagu Mariappan Novice

      Hai every one,


      I need to display 1000 records in a dataTable . I use the JbossCache to reduce the page loading time.


      I use the following steps for JbossCache



      • I put jboss-cache.jar and jgroups.jar in my EAR's lib folder

      • then I put treecache.xml file into resources folder



      This is my productList.xhtml code


      
      <s:cache key="topOrders" region="/TopOrders" enabled="true">
      
      <h:form>
      
      <rich:dataTable value="#{productList}" var="Product">
      
      <f:facet name="header">
      
      <rich:columnGroup>
      
      <h:column>
      
      <h:outputText value="SubcategoryName" />
      
      </h:column>
      
      <h:column>
      
      <h:outputText value="Product Name" />
      
      </h:column>
      
      </f:facet>
      
      </rich:columnGroup>
      
      <h:column>
      
      <h:outputText value="#{Product.subcat}" />
      
      </h:column>
      
      <h:column>
      
      <h:outputText value="#{Product.name}" />
      
      </h:column>
      
      </rich:dataTable>
      
      </h:form>
      
      </s:cache>
      
      


      This is my treecache.xml code


      
      <?xml version="1.0" encoding="UTF-8"?>
      
      
      <!-- ===================================================================== -->
      
      <!--                                                                       -->
      
      <!--  PojoCache Service Configuration                               -->
      
      <!--                                                                       -->
      
      <!-- ===================================================================== -->
      
      
      <server>
      
      
         <!-- Used inside JBoss AS
      
         <classpath codebase="./lib" archives="jboss-cache.jar, jgroups.jar"/>
      
       -->
      
       
      
         <!-- ==================================================================== -->
      
         <!-- Defines configuration                                                -->
      
         <!-- ==================================================================== -->
      
      
         <mbean code="org.jboss.cache.aop.PojoCache" name="jboss.cache:service=testPojoCache">
      
      
              <!-- Used inside JBoss AS -->
      
              <depends>jboss:service=Naming</depends>
      
              <depends>jboss:service=TransactionManager</depends>
      
      
              <!--
      
                   Configure the TransactionManager
      
              <attribute name="TransactionManagerLookupClass">org.jboss.cache.DummyTransactionManagerLookup</attribute>
      
              -->
      
      
              <!--
      
                   Node locking scheme:
      
                   OPTIMISTIC
      
                   PESSIMISTIC (default)
      
              -->
      
              <attribute name="NodeLockingScheme">PESSIMISTIC</attribute>
      
      
              <!--
      
                   Note that this attribute is IGNORED if your NodeLockingScheme above is OPTIMISTIC.
      
                   
      
                   Isolation level : SERIALIZABLE
      
                   REPEATABLE_READ (default)
      
                   READ_COMMITTED
      
                   READ_UNCOMMITTED
      
                   NONE
      
              -->
      
              <attribute name="IsolationLevel">REPEATABLE_READ</attribute>
      
      
              <!--
      
                   Valid modes are LOCAL
      
                   REPL_ASYNC
      
                   REPL_SYNC
      
                   INVALIDATION_ASYNC
      
                   INVALIDATION_SYNC
      
              -->
      
              <attribute name="CacheMode">LOCAL</attribute>
      
      
              <!-- Name of cluster. Needs to be the same for all clusters, in order
      
                   to find each other
      
              -->
      
              <attribute name="ClusterName">Sample-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: 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="228.1.2.5" mcast_port="45577" 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" up_thread="false" down_thread="false" />
      
                        <pbcast.STABLE desired_avg_gossip="20000" up_thread="false" down_thread="false" />
      
                        <UNICAST timeout="600,1200,2400" window_size="100" min_threshold="10" 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">20000</attribute>
      
      
              <!--
      
                   Number of milliseconds to wait until all responses for a
      
                   synchronous call have been received.
      
              -->
      
              <attribute name="SyncReplTimeout">15000</attribute>
      
      
              <!-- Max number of milliseconds to wait for a lock acquisition -->
      
              <attribute name="LockAcquisitionTimeout">10000</attribute>
      
      
              <!-- Name of the eviction policy class. We have commented it off to disable eviction.
      
              -->
      
                   <attribute name="EvictionPolicyClass">org.jboss.cache.aop.eviction.AopLRUPolicy</attribute>
      
      
              <!-- Specific eviction policy configurations. This is LRU -->
      
              <attribute name="EvictionPolicyConfig">
      
                   <config>
      
                        <attribute name="wakeUpIntervalSeconds">5</attribute>
      
                        <!-- Cache wide default -->
      
                        <region name="/_default_">
      
                             <attribute name="maxNodes">5000</attribute>
      
                             <attribute name="timeToLiveSeconds">5</attribute>
      
                        </region>
      
                        <region name="/aop">
      
                             <attribute name="maxNodes">5</attribute>
      
                             <attribute name="timeToLiveSeconds">4</attribute>
      
                        </region>
      
                        <region name="/pojo">
      
                             <attribute name="maxNodes">100</attribute>
      
                             <attribute name="timeToLiveSeconds">4</attribute>
      
                        </region>
      
                        <region name="/TopOrders">
      
                             <attribute name="maxNodes">100</attribute>
      
                             <attribute name="timeToLiveSeconds">0</attribute>
      
                             <attribute name="maxAgeSeconds">86400</attribute>
      
                        </region>
      
                   </config>
      
              </attribute>
      
         </mbean>
      
      
      </server>     
      
      


      And my session bean code is


      
      @Stateful
      
      @Name("productsearch")
      
      public class ProductsAction  implements ProductsLocal,Serializable
      
      {
      
      @RequestParameter
      
      String subcategoryName;
      
      
      @Out(required=false)
      
      List<TblProducts> productList;
      
      
      @Begin(join=true)
      
      public String selectFromRequest() {
      
      productList =em.createQuery("select t from TblProducts t where t.subcat="+ subcategoryName).getResultList();
      
      
      }
      
      }
      
      
      


      I invoke selectFromRequest method when some one clicks the s:link on my home page and also I pass the subcategoryName through f:param. 


      I need to prevent frequent query execution. I don’t know how to implement that. Is there any need for logic changes in my session bean class.


      Any one, please help me.


      By
      Thiagu. M

        • 1. Re: How to do the JbossCache
          Tom Goring Apprentice

          I think your at least missing query.setHint :


          e.g.



                    Query query = em.createQuery("from ConfigValue val where val.configParameter.configKey = ? and val.configSet.configSetId = ? ");
                    query = query.setParameter(1, key);
                    query = query.setParameter(2, configSet.key());
                    query.setHint("org.hibernate.cacheable", true);