How to use the JbossCache
thiagu.m Mar 18, 2008 11:06 AMHai 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