How to do the JbossCache
thiagu.m Mar 19, 2008 12:16 PMHai 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