[Jboss-dev-forums] [Design of JTA and JTS on JBoss] - Re: Where should UserTransaction live?

[reverbel <nu...@jb...>]

"ad...@jb..." wrote : The transaction manager module exists independently of remote access or its
  | implementation details.
Yes and no.

Yes, the core transaction manager should not depend on implementation details of modules that provide remote access to it. The code in CVS satisfies this requirement. The transaction module should still compile if you delete everything under tm/remoting but the subdir tm/remoting/interfaces.

No, the transaction manager must be aware of remote access, as it must know a set of interfaces implemented by remote access providers. It must keep references to remote resources (which implement a Resource interface), a reference to a parent coordinator (which implement a Coordinator interface), etc. It must call methods on remote Resource and Coordinator objects at appropriate times. 

Remote access interfaces currently live in org.jboss.tm.remoting.interfaces. Two remote access providers implement those interfaces: a remote access provider based on JBoss remoting and dynamic proxies, which consists of the remaining classes under tm/remoting, and an IIOP/OTS-based one, which lives in org.jboss.tm.iiop (in the iiop module).

Perhaps you are simply saying that the code in org.jboss.tm.remoting.interfaces should be moved to another Java package? (I have actually considered creating a new package org.jboss.transaction, which would contain interfaces implemented either by the core TM or by remote access providers.)

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