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https://issues.apache.org/jira/browse/GIRAPH-80?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13171788#comment-13171788
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jirapos...@reviews.apache.org commented on GIRAPH-80:
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Ship it!


+1.  Thanks for the changes.  I will commit and then open up a separate JIRA to 
make setMessages() package-private.

- Avery


On 2011-12-17 09:36:06, Sebastian Schelter wrote:
bq.  
bq.  -----------------------------------------------------------
bq.  This is an automatically generated e-mail. To reply, visit:
bq.  https://reviews.apache.org/r/3203/
bq.  -----------------------------------------------------------
bq.  
bq.  (Updated 2011-12-17 09:36:06)
bq.  
bq.  
bq.  Review request for giraph.
bq.  
bq.  
bq.  Summary
bq.  -------
bq.  
bq.  refactoring that gives BasicVertex this 3 new methods:
bq.  
bq.      public abstract Iterable<M> getMessages()
bq.  
bq.  returns an unmodifiable iterable allowing access to the current messages
bq.  
bq.      public abstract void setMessages(Iterable<M> messages);
bq.  
bq.  replacement for getMsgList().clear() followed by getMsgList().addAll(...);
bq.  
bq.      public abstract void releaseResources();
bq.  
bq.  after a vertex voted to halt, all references to messages it could still 
hold should be removed to enable earlier GC, instead of externally calling 
replacement for getMsgList().clear(), this method should be used
bq.  
bq.  Local unit tests pass, unfortunately I wasn't yet able to run the tests on 
my hadoop cluster (still have problems because I can only access it via a socks 
proxy)
bq.  
bq.  
bq.  This addresses bug GIRAPH-80.
bq.      https://issues.apache.org/jira/browse/GIRAPH-80
bq.  
bq.  
bq.  Diffs
bq.  -----
bq.  
bq.    /trunk/src/main/java/org/apache/giraph/comm/BasicRPCCommunications.java 
1215442 
bq.    /trunk/src/main/java/org/apache/giraph/graph/BasicVertex.java 1215442 
bq.    /trunk/src/main/java/org/apache/giraph/graph/BasicVertexResolver.java 
1215442 
bq.    /trunk/src/main/java/org/apache/giraph/graph/EdgeListVertex.java 1215442 
bq.    /trunk/src/main/java/org/apache/giraph/graph/GraphMapper.java 1215442 
bq.    
/trunk/src/main/java/org/apache/giraph/graph/LongDoubleFloatDoubleVertex.java 
1215442 
bq.    /trunk/src/main/java/org/apache/giraph/graph/Vertex.java 1215442 
bq.    /trunk/src/main/java/org/apache/giraph/graph/VertexResolver.java 1215442 
bq.    /trunk/src/main/java/org/apache/giraph/utils/ComparisonUtils.java 
PRE-CREATION 
bq.    /trunk/src/main/java/org/apache/giraph/utils/MemoryUtils.java 1215442 
bq.    /trunk/src/test/java/org/apache/giraph/utils/ComparisonUtilsTest.java 
PRE-CREATION 
bq.  
bq.  Diff: https://reviews.apache.org/r/3203/diff
bq.  
bq.  
bq.  Testing
bq.  -------
bq.  
bq.  
bq.  Thanks,
bq.  
bq.  Sebastian
bq.  
bq.


                
> 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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