"[EMAIL PROTECTED]" wrote : 1. PojoCache does not support pure eviction. That
is, it will support pure cache loader (persistency) or passivation (eviction +
cacheloading).
|
| 2. Yes.
For point 1 , i wrote following test code
| package org.jboss.cache.passivation;
|
| import java.io.Serializable;
| import java.util.Properties;
|
| import javax.naming.Context;
| import javax.naming.InitialContext;
| import javax.transaction.UserTransaction;
|
| import org.apache.commons.logging.Log;
| import org.apache.commons.logging.LogFactory;
| import org.jboss.cache.CacheException;
| import org.jboss.cache.Fqn;
| import org.jboss.cache.PropertyConfigurator;
| import org.jboss.cache.aop.PojoCache;
| import org.jboss.cache.data.Address;
| import org.jboss.cache.data.Person;
| import org.jboss.cache.loader.CacheLoader;
| import org.jboss.cache.loader.SamplePojo;
|
| public class AOPTestPassivation1 {
|
| PojoCache cache = null;
| CacheLoader loader = null;
|
| /**
| * @param args
| */
| public static void main(String[] args) throws Exception {
| AOPTestPassivation1 tester = new AOPTestPassivation1();
| tester.start();
| Log log = LogFactory.getLog(AOPTestPassivation1.class);
| long start = System.currentTimeMillis();
| tester.test1();
| System.out.println("/test/1:" +
tester.cache.getObject(Fqn.fromString("/test/1")));
| System.out.println("/test/2:" +
tester.cache.getObject(Fqn.fromString("/test/2")));
| Thread.sleep(6000);
|
| System.out.println("/test/3:" +
tester.cache.getObject(Fqn.fromString("/test/3")));
|
| long end = System.currentTimeMillis();
| System.out.println(end - start);
|
| tester.stop();
| }
|
|
|
| private void test1() throws Exception{
| String key = "key";
| String obj = "obj";
| long start = System.currentTimeMillis();
| long end = System.currentTimeMillis();
| for(int i = 0; i < 1; i ++){
| end = System.currentTimeMillis();
| System.out.println("PPP:" + i + " Time:" +
(end-start));
| start = end;
| for(int j = 0; j < 15; j ++){
|
| cache.putObject("/test/"+(i*1000+j), "Object" +
i);
| }
| }
| }
|
|
| private void start() throws Exception{
| cache = new PojoCache();
| PropertyConfigurator pc = new PropertyConfigurator();
| pc.configure(cache, "META-INF/aop-tree-service1.xml");
|
| cache.createService();
| cache.startService();
| loader = cache.getCacheLoader();
|
| }
|
|
| private void stop() throws Exception{
| cache.remove("/");
| //loader.remove(Fqn.fromString("/"));
| cache.stopService();
| cache.destroyService();
| }
|
| }
|
| <?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.aop.PojoCache"
| name="jboss.cache:service=testTreeCache">
|
| <depends>jboss:service=Naming</depends>
| <depends>jboss:service=TransactionManager</depends>
|
| <attribute
name="TransactionManagerLookupClass">org.jboss.cache.DummyTransactionManagerLookup</attribute>
|
| <attribute name="IsolationLevel">REPEATABLE_READ</attribute>
|
| <attribute name="CacheMode">REPL_SYNC</attribute>
|
| <attribute name="ClusterName">TreeCache-Cluster</attribute>
|
| <attribute name="InitialStateRetrievalTimeout">20000</attribute>
|
| <attribute name="SyncReplTimeout">15000</attribute>
|
| <attribute name="LockAcquisitionTimeout">10000</attribute>
|
| <attribute
name="EvictionPolicyClass">org.jboss.cache.aop.eviction.AopLRUPolicy</attribute>
|
| <attribute name="EvictionPolicyConfig">
| <config>
| <attribute name="wakeUpIntervalSeconds">5</attribute>
| <!-- Cache wide default -->
| <region name="/_default_">
| <attribute name="maxNodes">5000</attribute>
| <attribute name="timeToLiveSeconds">1000</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="/test">
| <attribute name="maxNodes">10</attribute>
| <attribute name="timeToLiveSeconds">0</attribute>
| </region>
| </config>
| </attribute>
|
|
| <attribute name="CacheLoaderConfiguration">
| <config>
| <passivation>true</passivation>
|
| <shared>false</shared>
|
| <cacheloader>
|
<class>org.jboss.cache.loader.bdbje.BdbjeCacheLoader</class>
| <properties>
| location=c:/tmp/filetore1
| </properties>
| <async>false</async>
|
| <fetchPersistentState>false</fetchPersistentState>
| <ignoreModifications>false</ignoreModifications>
| <purgeOnStartup>false</purgeOnStartup>
| </cacheloader>
|
| </config>
| </attribute>
|
| </mbean>
|
|
| </server>
|
The result is different base on passivation element configureation
1. true output
| /test/1:Object0
| /test/2:Object0
| /test/3:null
|
false output
| /test/1:Object0
| /test/2:Object0
| /test/3:Object0
|
It seems the eviction + cacheloading works base on the passivation
configuration value
I check the document for passivation
1. <!-- if passivation is true, only the first cache loader is used; the rest
are ignored -->
false
2.To enable cache passivation/activation, you can set passivation to true. The
default is false. You set it via the XML cache configuration file. The XML
above shows the passivation element when configuring a cache loader. When
passivation is used, only the first cache loader configured is used. All others
are ignored.
how to explain the test result, thanks..
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