Distributed Cache Clear for entity cache

[Vijay A]

Hi,
    we are setting up a cluster of ofbiz(opentaps) instances for load
balancing.
Both the instances will point to the same database.

We want the entity cache to be consistent across both the instances.

From the documentation, I gather that we need to set *
distributed-cache-clear-enabled="true"* in entity-engine.xml.
We also set the *distributed-cache-clear-class-name as
org.ofbiz.entityext.cache.EntityCacheServices*

Even after doing so, the cache on the other instance is not getting cleared
for a particular entity under observation.

Do I need to set up a JMS server?
How do I tell ofbiz / entity engine cache which JMS server should it look up
and what topic it should publish to?
How do I configure ofbiz / entity engine which JMS server it should lookup
and the topic it needs to subscribe to?

In services.xml, I see the engine as JMS. How does this service get invoked
on the other instance ?

    <service name="distributedClearCacheLineByValue" engine="*jms*"
location="serviceMessenger" invoke="clearCacheLineByValue" auth="true">
        <description>Clear Cache Line by value for all Servers listening to
the topic</description>
        <attribute name="value" type="org.ofbiz.entity.GenericValue"
mode="IN" optional="false"/>
    </service>

Any help / pointers are appreciated
Thanks in advance,
Vijay

[Anand H I]

Setting up the ActiveMQ server with opentaps :
0)Start the activeMQ server locally and copy the all-activeMq jar to the
framework/base/lib

change the name of dispatcher in abstractjmslistener.java from
"JMSDispatcher" to "entity-default"


1)
in jndiservers.xml
:61616"
           
initial-context-factory="org.apache.activemq.jndi.ActiveMQInitialContextFactory"/>

2)
in jndi.properties
java.naming.factory.initial=org.apache.activemq.jndi.ActiveMQInitialContextFactory
java.naming.provider.url=tcp://:61616
topic.OFBTopic=OFBTopic
connectionFactoryNames = connectionFactory,
queueConnectionFactory,topicConnectionFactory

3)
in serviceengine.xml


           
       

4)

in entityengine.xml



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[Anand H I]

Setting up the ActiveMQ server with opentaps :

0)Start the activeMQ server locally and copy the all-activeMq jar to the framework/base/lib

change the name of dispatcher in abstractjmslistener.java from "JMSDispatcher" to "entity-default"

1) in jndiservers.xml

jndi-server name="ActiveMQ" context-provider-url="tcp://:61616" initial-context-factory="org.apache.activemq.jndi.ActiveMQInitialContextFactory"/

2) in jndi.properties

java.naming.factory.initial=org.apache.activemq.jndi.ActiveMQInitialContextFactory

java.naming.provider.url=tcp://:61616

topic.OFBTopic=OFBTopic

connectionFactoryNames = connectionFactory, queueConnectionFactory,topicConnectionFactory

3) in serviceengine.xml

jms-service name="serviceMessenger" send-mode="all"

server jndi-server-name="ActiveMQ"

jndi-name="topicConnectionFactory"

topic-queue="OFBTopic"

type="topic"

username="system"

password="manager"

listen="true"/

/jms-service

4) in entityengine.xml

delegator name="default" entity-model-reader="main" entity-group-reader="main" entity-eca-reader="main" distributed-cache-clear-enabled="true"

[Jacques Le Roux]

There is currently an issue in OFBiz trunk, but, I guess, it's not related to Opentaps
https://issues.apache.org/jira/browse/OFBIZ-3987

Jacques

From: "Anand H I" <[hidden email]>

> Setting up the ActiveMQ server with opentaps :
> 0)Start the activeMQ server locally and copy the all-activeMq jar to the
> framework/base/lib
>
> change the name of dispatcher in abstractjmslistener.java from
> "JMSDispatcher" to "entity-default"
>
>
> 1)
> in jndiservers.xml
> :61616"
>          
> initial-context-factory="org.apache.activemq.jndi.ActiveMQInitialContextFactory"/>
>
> 2)
> in jndi.properties
> java.naming.factory.initial=org.apache.activemq.jndi.ActiveMQInitialContextFactory
> java.naming.provider.url=tcp://:61616
> topic.OFBTopic=OFBTopic
> connectionFactoryNames = connectionFactory,
> queueConnectionFactory,topicConnectionFactory
>
> 3)
> in serviceengine.xml
>
>
>            
>        
>
> 4)
>
> in entityengine.xml
>
>
>
> --
> View this message in context: http://ofbiz.135035.n4.nabble.com/Distributed-Cache-Clear-for-entity-cache-tp3222828p3346065.html
> Sent from the OFBiz - User mailing list archive at Nabble.com.
>

[Jacques Le Roux]

Thanks Anand,

Your message was very useful to fix some bugs... Still on it...

Jacques