[esb-issues] [JBoss JIRA] Commented: (JBESB-802) ServiceInvoker should hide EPRs

[Mark Little (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBESB-802?page=comments#action_12371652 ] 
            
Mark Little commented on JBESB-802:
-----------------------------------

Let's take this offline for now, so we don't pollute JIRA any further ;-) (And I'm as much to blame as anyone).

> ServiceInvoker should hide EPRs
> -------------------------------
>
>                 Key: JBESB-802
>                 URL: http://jira.jboss.com/jira/browse/JBESB-802
>             Project: JBoss ESB
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: Rosetta
>    Affects Versions: 4.2 Milestone Release 3
>            Reporter: Mark Little
>         Assigned To: Mark Little
>             Fix For: 5.0 Milestone Release 1
>
>
> EPRs were never intended to be used by the majority of developers. They are the "physical" address of individual services. The "logical" name is the service name, that might map down to one or more EPRs. But most of the time developers would be using the logical name. At least that was the approach in the original pre-Rosetta days. By the time you get down to working with EPRs and headers (Call) you're really working at the lowest level and talking about a specific Message going to a specific service instance.
> The higher level abstraction should be working only in terms of the message payload (Body, Attachments, etc.) and service names. FaultTo, To, ReplyTo etc. would be abstracted to service names by the API. The implementation would hide the mapping of service name to specific EPRs when necessary to ultimately deliver a message.
> Shouldn't ServiceInvoker work in the same way? On the one hand it seems to be one SI instance per client per service (you create the instance and pass in the servicename [equivalent of defining To]). However, because the deliverSync and deliverAsync work in terms of Messages, it's then entirely possible for that information to be ignored by the user, i.e., you can use any SI instance to deliver a message to any service as long as you define the To field correctly.

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