[jboss-jira] [JBoss JIRA] Resolved: (JGRP-518) RpcDispatcher: filter for accepting incoming responses

[Bela Ban (JIRA)]

     [ http://jira.jboss.com/jira/browse/JGRP-518?page=all ]

Bela Ban resolved JGRP-518.
---------------------------

    Resolution: Done

> RpcDispatcher: filter for accepting incoming responses
> ------------------------------------------------------
>
>                 Key: JGRP-518
>                 URL: http://jira.jboss.com/jira/browse/JGRP-518
>             Project: JGroups
>          Issue Type: Feature Request
>            Reporter: Manik Surtani
>         Assigned To: Bela Ban
>             Fix For: 2.6
>
>
> [Manik's email]
> Are there any plans to implement a way to register a filter when using the RpcDispatcher when waiting for results?
> Current options (GroupRequest.GET_ALL, GET_NONE, GET_MOST, GET_FIRST, etc) is insufficient where you want the call to block until the first *acceptable* response is received.
> Basically, if I expect responses from everyone in the cluster but want to wait for the first acceptable response, I have no choice but to do a GET_ALL and then parse all the responses for the first acceptable one.  Now the definition of an acceptable response is application-specific, and so perhaps a mechanism to register a filter would be useful.  Perhaps something like:
>     RpcDispatcher.callRemoteMethods(Vector dests, MethodCall call, int mode, long timeout, boolean use_anycasting, ResponseFilter responseFilter)
>     public interface ResponseFilter
>     {
>         boolean isAcceptable(Object response);
>     }
> If a filter is provided, only responses that pass the isAcceptable() test is added to the response list.  Then GroupRequest.GET_FIRST could be used and we could have a very efficient mechanism of not having to wait for all responses. 

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