Terracotta + Hibernate Second Level Caching Error::java.lang.AbstractMethodError: net.sf.ehcache.Cache.setCacheLoader

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----- Original Message -----

From: amiller@...

To: tc-users@...

Sent: Thursday, July 03, 2008 2:17 PM

Subject: Re: [tc-users] Terracotta + Hibernate Second Level Caching Error::java.lang.AbstractMethodError: net.sf.ehcache.Cache.setCacheLoader

Hi, 

I notice a couple things wrong here.  I'm not sure they will solve your problem (looks more like a versioning/classpath issue), but it's a good place to start. 

1) It looks like your module declaration for Hibernate is incorrect in your tc-config.xml.  This isn't your fault as it looks like it is incorrect on the Forge docs as well.  The hibernate line should be:

<module name="tim-hibernate-3.2.5" version="1.1.2" group-id="org.terracotta.modules"/>

I'm assuming you are using Hibernate 3.2.5.  We also support Hibernate 3.1.2 although I'd recommend using 3.2.5.

2) It looks like you are missing an ehcache cache definition:

  <cache name="org.hibernate.cache.UpdateTimestampsCache"

      maxElementsInMemory="5000"

      timeToIdleSeconds="120"

      timeToLiveSeconds="120"

      eternal="true"/>

This is important for setting up the Ehcache eviction.

3) I'm not sure about whether the region attribute on the annotations should be there.  

4) Finally, you don't list your classpath, but I would double-check that you are using:

- ehcache-1.3.0.jar

- commons-logging-1.1.1.jar

- jsr107cache-1.0.jar    (from http://sourceforge.net/projects/jsr107cache/)

- hibernate-3.jar     (from Hibernate 3.2.5 release - http://sourceforge.net/project/showfiles.php?group_id=40712)

Also you might find one of these blog entries helpful for Ehcache and Hibernate:

http://unserializableone.blogspot.com/2007/09/distributed-ehcache-as-second-level.html

http://tech.puredanger.com/2008/06/17/distributed-ehcache-with-terracotta/

Alex

On Jul 3, 2008, at 12:46 AM, Anjitha wrote:

Hii

 

I am a newbie to Terrcotta. I am trying to integrate EH cache with Teracotta . I am attempting to share a Hibernate 2nd level cache using DSO .However I am getting
errors from Terracotta when hibernate attempts to populate the cache:But I am getting the following error .Please advice me on this.

 

java.lang.AbstractMethodError: net.sf.ehcache.Cache.setCacheLoader(Lnet/sf/ehcache/loader/CacheLoader;)V

at net.sf.ehcache.config.ConfigurationHelper.createCache(ConfigurationHelper.java:422)

at net.sf.ehcache.config.ConfigurationHelper.createDefaultCache(ConfigurationHelper.java:334)

at net.sf.ehcache.CacheManager.configure(CacheManager.java:293)

at net.sf.ehcache.CacheManager.__tc_wrapped_init(CacheManager.java:225)

at net.sf.ehcache.CacheManager.init(CacheManager.java)

at net.sf.ehcache.CacheManager.<init>(CacheManager.java:186)

at org.hibernate.cache.EhCacheProvider.start(EhCacheProvider.java:127)

at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:183)

at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1300)

at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)

at com.mystiqmobile.platform.db.hibernateobjects.HibernateUtil.initialize(HibernateUtil.java:49)

at com.mystiqmobile.platform.db.hibernateobjects.HibernateUtil.initialize(HibernateUtil.java:33)

at com.mystiqmobile.platform.db.hibernateobjects.test.TestDevice.main(TestDevice.java:48)

 

tc-Config .XML

 

<?xml version="1.0" encoding="UTF-8"?>

<con:tc-config xmlns:con="http://www.terracotta.org/config">

<servers>

<server host="%i" name="localhost">

<dso-port>9510</dso-port>

<jmx-port>9520</jmx-port>

<data>terracotta/server-data</data>

<logs>terracotta/server-logs</logs>

</server>

<update-check>

<enabled>true</enabled>

</update-check>

</servers>

<clients>

<logs>terracotta/client-logs</logs>

<modules>

<module name="tim-hibernate"

version="1.1.2"

group-id="org.terracotta.modules"/>

<module group-id="org.terracotta.modules" name="tim-ehcache-1.3" version="1.1.2"/>

</modules>

</clients>

</con:tc-config>

 

 

EHCache.XML

 

 

<?xml version="1.0" encoding="UTF-8"?>

<ehcache>

<diskStore path="java.io.tmpdir"/>

<defaultCache

maxElementsInMemory="50"

eternal="false"

timeToIdleSeconds="120"

timeToLiveSeconds="120"

overflowToDisk="true"

diskPersistent="false"

diskExpiryThreadIntervalSeconds="120"

memoryStoreEvictionPolicy="LRU"

/>

<cache name="TrialHibernateCache"

maxElementsInMemory="50"

eternal="false"

timeToIdleSeconds="120"

timeToLiveSeconds="120"

overflowToDisk="true"

diskPersistent="false"

diskExpiryThreadIntervalSeconds="120"

memoryStoreEvictionPolicy="LRU"

/>

<cache

name="org.hibernate.cache.StandardQueryCache"

maxElementsInMemory="5"

eternal="false"

timeToLiveSeconds="120"

overflowToDisk="true"/>

</ehcache>

My Hibernate.cfg file:::

 

 

<?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory name="mydbSessionFactory">

<property name="connection.driver_class">org.gjt.mm.mysql.Driver</property>

<property name="connection.password">root</property>

<property name="connection.url">jdbc:mysql://localhost/trialDB</property>

<property name="connection.username">root</property>

<property name="default_schema">trialDB</property>

<property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>

<property name="current_session_context_class">thread</property>

<property name="hbm2ddl.auto">update</property>

<!-- C3P0 Stuff -->

<property name="hibernate.c3p0.acquire_increment">3</property>

<property name="hibernate.c3p0.idle_test_period">14400</property>

<property name="hibernate.c3p0.timeout">25200</property>

<property name="hibernate.c3p0.max_size">15</property>

<property name="hibernate.c3p0.min_size">3</property>

<property name="hibernate.c3p0.max_statements">0</property>

<property name="hibernate.c3p0.preferredTestQuery">select 1;</property>

 

<property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property>

<property name="hibernate.cache.use_second_level_cache">true</property>

<property name="hibernate.cache.use_query_cache">true</property>

<property name="hibernate.cache.provider_configuration_file_resource_path">ehcache.xml</property>

<!--- here list of mapping classes ---->

</session-factory>

</session-factory>

</hibernate-configuration>

 

 

I am  annotating at Hibernate Objects(POJOS)  for enabling Cache as shown below:

@Cache (usage=CacheConcurrencyStrategy.READ_WRITE, region="TrialHibernateCache")

 

 

Any advice would be helpful.Thanking all in advance.

 

Regards

Anjitha

Software Engineer

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