0 Replies Latest reply on Mar 18, 2008 11:06 AM by Thiagu Mariappan

    How to use the JbossCache

    Thiagu Mariappan Novice

      Hai every one
      I need to display the 1000 recodes with in dataTable. I need to increase the reduce page load time.
      So I planed to use the JbossCache in that page.

      So I make following configuration
      1. I add this jboss-cache.jar and jgroups.jar files within my Ear/lib folder and also my project classpath
      2. I add treecache.xml file within resources folder
      3. s:cache with my view page

      This is my sample code
      This is my productList.xhtml page

      <ui:composition xmlns="http://www.w3.org/1999/xhtml"
       xmlns:s="http://jboss.com/products/seam/taglib"
       xmlns:f="http://java.sun.com/jsf/core"
       xmlns:h="http://java.sun.com/jsf/html"
       xmlns:rich="http://richfaces.ajax4jsf.org/rich"
       template="layout/template.xhtml"
       xmlns:a4j="https://ajax4jsf.dev.java.net/ajax">
      
      <ui:define name="body">
      <s:cache key="#{productList[0].subcat}" region="pageFragments">
      
      <h:dataTable value="#{productList}" var="product" >
      <h:column>
       <f:facet name="header">
      <h:outputText value="Subcategory Name">
      </f:facet>
      <h:outputText value="#{product.subcat}">
      </h:column>
      <h:column>
       <f:facet name="header">
      <h:outputText value="Product Name">
      </f:facet>
      <h:outputText value="#{product.name}">
      </h:column>
      </h:dataTable>
      
      </s:cache>
      </ui:define>
      </ui:composition>
      

      This is my session bean class

      @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 this method when some one click the like with subcategoryName from home page and so, I page the subcategory name a f:param argument .
      This is my treecache.xml page
      <?xml version="1.0" encoding="UTF-8"?>
      
      <!-- ===================================================================== -->
      <!-- -->
      <!-- Sample TreeCache Service Configuration -->
      <!-- -->
      <!-- ===================================================================== -->
      
      <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.JBossTransactionManagerLookup</attribute>
      
       <!--
       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>
      
       <!--
       Just used for async repl: use a replication queue
       -->
       <attribute name="UseReplQueue">false</attribute>
      
       <!--
       Replication interval for replication queue (in ms)
       -->
       <attribute name="ReplQueueInterval">0</attribute>
      
       <!--
       Max number of elements which trigger replication
       -->
       <attribute name="ReplQueueMaxElements">0</attribute>
      
       <!-- Name of cluster. Needs to be the same for all clusters, in order
       to find each other
       -->
       <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: 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="228.1.2.3" mcast_port="48866"
       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" />-->
       <FD_SOCK/>
       <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="true" down_thread="true"/>
       </config>
       </attribute>
      
       <!--
       Whether or not to fetch state on joining a cluster
       NOTE this used to be called FetchStateOnStartup and has been renamed to be more descriptive.
       -->
       <attribute name="FetchInMemoryState">true</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">20000</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"></attribute>
      
       <!--
       Indicate whether to use marshalling or not. Set this to true if you are running under a scoped
       class loader, e.g., inside an application server. Default is "false".
       -->
       <attribute name="UseMarshalling">false</attribute>
      
       </mbean>
      
      
       <!-- Uncomment to get a graphical view of the TreeCache MBean above -->
       <!-- <mbean code="org.jboss.cache.TreeCacheView" name="jboss.cache:service=TreeCacheView">-->
       <!-- <depends>jboss.cache:service=TreeCache</depends>-->
       <!-- <attribute name="CacheService">jboss.cache:service=TreeCache</attribute>-->
       <!-- </mbean>-->
      
      
      </server>
      
      

      i need to add any code in my session bean also .
      it always execut the query when i go to that page.
      if i use static key value for s:cache i can see the same result for all the subcategory . so the cache function is working , but i need to prevent query execution often .i dont know how to do that
      please any one help me

      by
      Thiagu.m