[jboss-dev-forums] [Design of JBoss ESB] - Re: ESB Action transactions and synhronization questions

[Kevin.Conner@jboss.com]

It is not used in the scheduled listener case, but for all other listeners it will be.

If you use a POJO as an action then a new instance will be created for every message passing through the pipeline.  This is for historical reasons.

If your action implements the ActionPipelineProcessor or ActionLifecycle interfaces then there will be a single instance created for each pipeline (incoming transport).  The action must be thread safe as it is possible for multiple threads to access it concurrently.

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