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1. Re: Can TcpDelegatingCacheLoader only delegate remove node?
manik Jul 24, 2007 11:25 AM (in response to rikr2)No.
If you want this behaviour, subclass TDCL and override the methods you don't want operations for. -
2. Re: Can TcpDelegatingCacheLoader only delegate remove node?
rikr2 Jul 24, 2007 11:29 AM (in response to rikr2)Thanks for your help
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3. Re: Can TcpDelegatingCacheLoader only delegate remove node?
rikr2 Aug 13, 2007 11:01 AM (in response to rikr2)Hey Manik I subclass TcpDelegatingCacheLoader in this way:
package org.jboss.cache.loader.tcp; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set; import org.jboss.cache.Fqn; import org.jboss.cache.Modification; import org.jboss.cache.loader.DelegatingCacheLoader; public class MyTcpDelegatingCacheLoader extends TcpDelegatingCacheLoader { @Override protected void delegatePut(Fqn name, Map attributes) throws Exception { //nothing to do } @Override protected Object delegatePut(Fqn name, Object key, Object value) throws Exception { //nothing to do return null; } @Override protected Map delegateGet(Fqn arg0) throws Exception { return null; } @Override protected Set delegateGetChildrenNames(Fqn arg0) throws Exception { return null; } @Override protected void delegatePut(List modifications) throws Exception { synchronized (out) { out.reset(); out.writeInt(DelegatingCacheLoader.putList); int length = modifications != null ? modifications.size() : 0; out.writeInt(length); if (length > 0) { for (Iterator it = modifications.iterator(); it.hasNext();) { Modification m = (Modification) it.next(); if (m.getType() == Modification.REMOVE_NODE) { //added by me m.writeExternal(out); } } } out.flush(); Object retval = in.readObject(); if (retval instanceof Exception) throw(Exception) retval; } } }
and I configure my Caches in this manner:
TcpCacheServer<?xml version="1.0" encoding="UTF-8"?> <!-- ===================================================================== --> <!-- --> <!-- Sample PojoCache Service Configuration --> <!-- --> <!-- ===================================================================== --> <server> <!-- Used inside JBoss AS --> <classpath codebase="./lib" archives="jboss-cache-jdk50.jar, jgroups.jar"/> <!-- ==================================================================== --> <!-- Defines configuration --> <!-- ==================================================================== --> <mbean code="org.jboss.cache.aop.PojoCache" name="jboss.cache:service=BackEndCache"> <!-- 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> --> <attribute name="TransactionManagerLookupClass">org.jboss.cache.JBossTransactionManagerLookup</attribute> <!-- Node locking scheme: OPTIMISTIC PESSIMISTIC (default) --> <attribute name="NodeLockingScheme">OPTIMISTIC</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> <!-- <attribute name="UseInterceptorMbeans">true</attribute> --> <!-- Name of cluster. Needs to be the same for all clusters, in order to find each other --> <attribute name="ClusterName">BackEndCache-Cluster</attribute> <!-- JGroups protocol stack properties. Can also be a URL, e.g. file:/home/bela/default.xml <attribute name="ClusterProperties"></attribute> --> <!-- This ORIGINAL CONFIF OF JGROUPS --> <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"/> --> <FD_SOCK/> <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> <!-- <attribute name="EvictionPolicyClass"></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">1000</attribute> <attribute name="timeToLiveSeconds">600</attribute> <attribute name="maxAgeSeconds">1200</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="/testMaxNode"> <attribute name="maxNodes">4</attribute> <attribute name="timeToLiveSeconds">100</attribute> </region> --> </config> </attribute> </mbean> <mbean code="org.jboss.cache.loader.tcp.TcpCacheServer" name="jboss.cache:service=TcpCacheServer"> <depends optional-attribute-name="Cache" proxy-type="attribute">jboss.cache:service=BackEndCache</depends> <attribute name="BindAddress">${jboss.bind.address:localhost}</attribute> <attribute name="Port">7500</attribute> <attribute name="MBeanServerName"></attribute> <!--<attribute name="CacheName">jboss.cache:service=TreeCache</attribute>--> </mbean> </server>
TcpDelegatingCacheLoader<?xml version="1.0" encoding="UTF-8"?> <!-- ===================================================================== --> <!-- --> <!-- Sample PojoCache Service Configuration --> <!-- --> <!-- ===================================================================== --> <server> <!-- Used inside JBoss AS --> <classpath codebase="./lib" archives="jboss-cache-jdk50.jar, jgroups.jar"/> <!-- ==================================================================== --> <!-- Defines configuration --> <!-- ==================================================================== --> <mbean code="org.jboss.cache.aop.PojoCache" name="jboss.cache:service=DelegatingCacheLoader"> <!-- 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> --> <attribute name="TransactionManagerLookupClass">org.jboss.cache.JBossTransactionManagerLookup</attribute> <!-- Node locking scheme: OPTIMISTIC PESSIMISTIC (default) --> <attribute name="NodeLockingScheme">OPTIMISTIC</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">DelegatingCacheLoader-Cluster</attribute> <!-- JGroups protocol stack properties. Can also be a URL, e.g. file:/home/bela/default.xml <attribute name="ClusterProperties"></attribute> --> <!-- This ORIGINAL CONFIF OF JGROUPS --> <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" 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> <!-- <attribute name="EvictionPolicyClass"></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">1000</attribute> <attribute name="timeToLiveSeconds">600</attribute> <attribute name="maxAgeSeconds">1200</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="/testMaxNode"> <attribute name="maxNodes">4</attribute> <attribute name="timeToLiveSeconds">100</attribute> </region> --> </config> </attribute> <attribute name="CacheLoaderConfiguration"> <config> <cacheloader> <class>org.jboss.cache.loader.tcp.MyTcpDelegatingCacheLoader</class> <!--<class>com.procyonsoluciones.mobistore.core.commom.cache.TcpDelegatingCache</class> --> <properties> host=localhost port=7500 </properties> <ignoreModifications>true</ignoreModifications> </cacheloader> </config> </attribute> </mbean> </server>
Later I try to store an object in my DelegatingCacheLoader through JMX Console (key= name, value = myname) and when i invoke the put Operation in DelegatingCacheLoader service this never end, it seems to be waiting for something. No error message is thrown. did I some wrong or i need to configure something else?
Thanks in advance -
4. Re: Can TcpDelegatingCacheLoader only delegate remove node?
manik Aug 22, 2007 10:12 AM (in response to rikr2)get and getChildrenNames should return empty collections, not nulls. Nulls imply that the node in question does not exist.