I have an MDB that acts as a router. It receives messages from a topic or a queue and 
forwards them to 0..n queues/topics based on a routing table. 

The problem is that this routing table needs to be configured dynamically during 
runtime. Unfortunately EJB:s are configured through deployment descriptors and within 
the boundaries of the bean lifecycle. Is there a way around this? Can I have my beans 
expose a management interface and change the configuration by means of JMX?

The only clean way that I can think of is to have the routing table configuration 
exist in a database and have the MDB do a number of database queries in its onMessage 
method to figure out the destinations. Having to do database lookups in onMessage 
method is a performance killer ofcourse.

Any alternatives? Should I drop the MDB approach and implement the router as a regular 
MBean?

- Janne

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