[jira] [Created] (QPID-5653) [Java Broker] Make message and configuration store stateless

["Keith Wall (JIRA)" <ji...@apache.org>]

Keith Wall created QPID-5653:
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             Summary: [Java Broker] Make message and configuration store stateless
                 Key: QPID-5653
                 URL: https://issues.apache.org/jira/browse/QPID-5653
             Project: Qpid
          Issue Type: Improvement
          Components: Java Broker
            Reporter: Keith Wall
            Assignee: Keith Wall


The MessageStore (and DurableConfigurationStore) implementations are currently stateful. They own the recovery process and have special rules around some states (in some states updates are ignored).  This is overly complicated.  Currently all store implementations need to code these rules. This is poor division of responsibilities and this presents a barrier to users wishing to produce their own store implementations.

This change will simplify the responsibilities of the store:

* introduce simpler lifecycle methods i.e. open/close
* simpler state concept, the store is either open or not
* visit methods for retrieving data from the store.  




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