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From "Claudio Martella (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-47) Export Worker's Context/State to vertices through pre/post/Application/Superstep
Date Wed, 05 Oct 2011 15:19:34 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-47?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13121037#comment-13121037
] 

Claudio Martella commented on GIRAPH-47:
----------------------------------------

another much easier way, at least for me, would be just to add a getContext() inside of BasicVertex
and return GraphMapper's Context. In this case I'd guess we could also change the definition
of Mapper from <Object, Object, Object, Object>, although it should work anyway if the
the object to write implements toString() accordingly.

Or, third possibility, adding an emit(Writable key, Writable value) method to BasicVertex
that forwards to Context.write().


                
> Export Worker's Context/State to vertices through pre/post/Application/Superstep
> --------------------------------------------------------------------------------
>
>                 Key: GIRAPH-47
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-47
>             Project: Giraph
>          Issue Type: Improvement
>          Components: graph
>    Affects Versions: 0.70.0
>            Reporter: Claudio Martella
>
> It would be quite useful for vertices to reach some worker-related information stored
i.e. in the GraphState class.
> This information could be exported as a parameter to pre/post/Application/Superstep like
this:
> public void preApplication(Configurable workerObject);
> public void postApplication(Configurable workerObject);
> public void preSuperstep(Configurable workerObject);
> public void postSuperstep(Configurable workerObject);
> public Configurable getWorkerObject();
> Another possibility is to add a Context inner class to BasicVertex to store this information.

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