2 Replies Latest reply on Mar 2, 2004 3:51 AM by glyn_walters

RO/RW pattern questions

glyn_walters Mar 1, 2004 12:48 PM

Hi

I have a couple of questions about the RW/RO pattern.

1. Is it valid to use the Clustered CMP 2.x EntityBean container configuration with commit B for the RW deployment? Or should I use commit C?

2. This is definitely a newbie question but I can't see how to differentiate in my session bean deployment ejb-ref between a RO and RW deployment of the same EJB.

I have my EJB deployed like this

<jboss>
 <enterprise-beans>
 <entity>
 <ejb-name>BBClientEJB-RO</ejb-name>
 <jndi-name>BBClientHome-RO</jndi-name>
 ..etc.
 </entity>
 <entity>
 <ejb-name>BBClientEJB-RW</ejb-name>
 <jndi-name>BBClientHome-RW</jndi-name>
 ..etc.
 </entity>
</jboss>

And my SLSB like this

<ejb-ref>
 <ejb-ref-name>ejb/BBClientHome</ejb-ref-name>
 <ejb-ref-type>Entity</ejb-ref-type>
 <home>com.brokerbox.bbserver.server.BBClientHomeRemote</home>
 <remote>com.brokerbox.bbserver.server.BBClientRemote</remote>
</ejb-ref>

As I understand it the ejb-ref-name is the jndi bind name for the EJB references within the SLSB instance. Should I be trying to reference one of the -RO or -RW deployments? And how would I do that?

Thanks
Glyn

1. Re: RO/RW pattern questions

glyn_walters Mar 1, 2004 1:29 PM (in response to glyn_walters)

I've just spotted the <jndi-name> tag for <ejb-ref> so I think that's the answer to one my questions above. I'm now getting an error with my deployment of the 2 EJB entities.

The error is because they are both sharing the same schema. Presumably this is a neccessary feature of the pattern. Is there something I am doing wrong in the deployment?

The error is:
18:54:42,913 ERROR [MainDeployer] could not create deployment: file:/C:/jboss-3.2.3/server/all/farm/BBServer.jar org.jboss.deployment.DeploymentException: BBClientEJBRW: Duplicate abstract-schema name 'BBClient'. Already defined for Entity 'BBClientEJBRO'.

The config is like this:

<ejb-jar>
 <enterprise-beans>
 <entity>
 <ejb-name>BBClientEJBRO</ejb-name>
 <home>com.brokerbox.bbserver.server.BBClientHomeRemote</home>
 <remote>com.brokerbox.bbserver.server.BBClientRemote</remote>
 <ejb-class>com.brokerbox.bbserver.server.BBClientBean</ejb-class>
 <persistence-type>Container</persistence-type>
 <prim-key-class>java.lang.String</prim-key-class>
 <reentrant>False</reentrant>
 <cmp-version>2.x</cmp-version>
 <abstract-schema-name>BBClient</abstract-schema-name>
 <cmp-field><field-name>userID</field-name></cmp-field>
 <cmp-field><field-name>fullname</field-name></cmp-field>
 <cmp-field><field-name>orgID</field-name></cmp-field>
 <cmp-field><field-name>brokerOrgID</field-name></cmp-field>
 <cmp-field><field-name>orgGroup</field-name></cmp-field>
 <cmp-field><field-name>userType</field-name></cmp-field>
 <cmp-field><field-name>securityBitSet</field-name></cmp-field>
 <cmp-field><field-name>clientType</field-name></cmp-field>
 <cmp-field><field-name>running</field-name></cmp-field>
 <cmp-field><field-name>connected</field-name></cmp-field>
 <cmp-field><field-name>verboseReporting</field-name></cmp-field>
 <cmp-field><field-name>available</field-name></cmp-field>
 <cmp-field><field-name>callbackProperties</field-name></cmp-field>
 <primkey-field>userID</primkey-field>
 <security-identity><use-caller-identity/></security-identity>
 <query>
 <query-method>
 <method-name>findByOrganisation</method-name>
 <method-params>
 <method-param>java.lang.String</method-param>
 </method-params>
 </query-method>
 <ejb-ql>
 SELECT OBJECT(c) FROM BBClient c
 WHERE c.orgID = ?1
 </ejb-ql>
 </query>
 </entity>
 <entity>
 <ejb-name>BBClientEJBRW</ejb-name>
 <home>com.brokerbox.bbserver.server.BBClientHomeRemote</home>
 <remote>com.brokerbox.bbserver.server.BBClientRemote</remote>
 <ejb-class>com.brokerbox.bbserver.server.BBClientBean</ejb-class>
 <persistence-type>Container</persistence-type>
 <prim-key-class>java.lang.String</prim-key-class>
 <reentrant>False</reentrant>
 <cmp-version>2.x</cmp-version>
 <abstract-schema-name>BBClient</abstract-schema-name>
 <cmp-field><field-name>userID</field-name></cmp-field>
 <cmp-field><field-name>fullname</field-name></cmp-field>
 <cmp-field><field-name>orgID</field-name></cmp-field>
 <cmp-field><field-name>brokerOrgID</field-name></cmp-field>
 <cmp-field><field-name>orgGroup</field-name></cmp-field>
 <cmp-field><field-name>userType</field-name></cmp-field>
 <cmp-field><field-name>securityBitSet</field-name></cmp-field>
 <cmp-field><field-name>clientType</field-name></cmp-field>
 <cmp-field><field-name>running</field-name></cmp-field>
 <cmp-field><field-name>connected</field-name></cmp-field>
 <cmp-field><field-name>verboseReporting</field-name></cmp-field>
 <cmp-field><field-name>available</field-name></cmp-field>
 <cmp-field><field-name>callbackProperties</field-name></cmp-field>
 <primkey-field>userID</primkey-field>
 <security-identity><use-caller-identity/></security-identity>
 <query>
 <query-method>
 <method-name>findByOrganisation</method-name>
 <method-params>
 <method-param>java.lang.String</method-param>
 </method-params>
 </query-method>
 <ejb-ql>
 SELECT OBJECT(c) FROM BBClient c
 WHERE c.orgID = ?1
 </ejb-ql>
 </query>
 </entity>
 ..etc.
</ejb-jar>

Thanks for any help on this
Glyn

2. Re: RO/RW pattern questions

glyn_walters Mar 2, 2004 3:51 AM (in response to glyn_walters)

The answer being RTFM :) <table-name>
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