Avery Ching commented on GIRAPH-80:

By the way Sebastian, you can run the Hadoop tests against a single node Hadoop 
instance (I often do this on my laptop).  It makes it much easier to run this 
test and takes me about 17 minutes or so.  Not too bad.
> Don't expose the list holding the messages in BasicVertex
> ---------------------------------------------------------
>                 Key: GIRAPH-80
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-80
>             Project: Giraph
>          Issue Type: Improvement
>    Affects Versions: 0.70.0
>            Reporter: Sebastian Schelter
> I'm currently trying to implement my own memory efficient vertex (similar to 
> LongDoubleFloatDoubleVertex) and ran into problems with getMsgList()
> This method returns a list pointing to the messages of the vertex and it is 
> modified externally (BasicRPCCommunications calls clear() and addAll() e.g.). 
> This makes it very hard to use something else than a java.util.List 
> internally (LongDoubleFloatDoubleVertex "hacked" around this) and it is 
> generally dangerous to have the internal state of an object be modified 
> externally. It also makes the code harder to read and understand.
> I'd suggest to change the API to let a vertex handle the modifications itself 
> internally (e.g. add something like pushMessages(...))

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