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From "Avery Ching (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 20:36:29 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-47?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13121448#comment-13121448
] 

Avery Ching commented on GIRAPH-47:
-----------------------------------

Sorry if I wasn't clear, but we could do away with the Configurable workerObject and instead
have a method in BasicVertex:

WorkerContext getWorkerContext();

While you may be blocked by GIRAPH-36 for your test, you can still try this out on the unittests
as they do use the pre/post/application/superstep methods (i.e. SimplePageRankVertex).  I've
modified the interface slightly to give the Context at the beginning.

{code}
public interface WorkerContext {
    void initialize(Context context); // Called before anything done on this worker      
                                   
    void close(); // Called when worker is done                           
    void preSuperstep(); // Called before compute() on any vertex                        
     
    void postSuperstep(); // Called after all vertices have run compute()                
          
}
{code}

                
> 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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