Do multiple resource adapters of different Message providers in Jboss EAP 6.4 share the default bean-instance-pool?

Question

We are using JBoss EAP6.4. In our project we are using two MOMs: 1) Websphere MQ 2) Solace MQ This is how the resource adapters of two above MOMs our defined in our standalone.xml



       

    

        
            
            
        
        
            
                
            
        

    


    
        

            
                wmq.jmsra.rar
                NoTransaction
                3
                true
                
                    
                        ${mq.channel}
                        ${mq.host}
                        ${mq.transportType}
                        ${mq.manager}
                        ${mq.port}                            
                    
                
                
                    
                        MQ
                        PERS
                        UNLIMITED
                        ${my.abc.queue}
                        mdMessageContext="2",mdWriteEnabled="true",mdReadEnabled="true"
                        ${mq.manager}
                                           
                
            

            
                sol-jms-ra-7.1.2.248.rar
                NoTransaction
                ${solace.extendedproperties}
                ${solace.username}
                ${solace.vpn}
                ${solace.connectionurl}
                ${solace.password}
                
                    
                        ${solace.connectionfactory}
                        
                            
                        
                        
                            false
                        
                        
                            
                                ${solace.username}
                                ${solace.password}
                            
                        
                    
                
                
                    
                        ${xyz.topic}

In above file, basically we have defined two resourceAdapters one for WMQ and one for Solace.

Under tag we have defined the default resource adapter name and defined value to limit the instance pool that is used by default for Message Driven Beans.


For few of the MDBs we have explicitly overriden the instance pool value per bean using jboss-ejb3.xml



Since we have multiple message driven beans listening to both WMQ and SOLACE, 
My question is:


Will the MDBs (listening to both WMQ queues and SOLACE queues) for which we haven't defined the explicit pool in jboss-ejb3.xml share the same default pool defined under  tag i.e.


    
    


Or is it like default pool will apply only to MDBs listening to WMQ queues. 
If the default pool is applied only to MDBs listening to WMQ queues, what happens to MDBs listening to Solace queues that have no pool size defined in either standalone.xml or jboss-ejb3.xml

Doug Grove · Accepted Answer

1) MDBs that do not have an instance pool specified will use the default mdb-strict-max-pool. You can define your own pools (which I recommend):

and then use the annotation:

import org.jboss.ejb3.annotation.Pool;

@Pool(value="MyPool")

in the MDB. This can also be done in the deployment descriptor file.

2) See above. I prefer an instance pool per MDB deployment. I do not like MDBs competing for the instance pool.

3) Same as above. Note that you can see the instance pool name that the MDB deployment is using in JMX. Note that if you have separate instance pools, the pool statistics become much more meaningful.

Do multiple resource adapters of different Message providers in Jboss EAP 6.4 share the default bean-instance-pool?

Answers (1)

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