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https://issues.apache.org/jira/browse/GIRAPH-36?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13107350#comment-13107350
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Avery Ching commented on GIRAPH-36:
-----------------------------------
There is an out-of-core part as well though (checkpointing). Forcing the types
(I, V, E, M) to implement Writable seemed like a nice easy way for Hadoop users
to jump into Giraph. Also, it provides us a lot of reusable objects
(IntWritable, FloatWritable, DoubleWritable, etc.). I am open to other ideas
of course. Let me know your thoughts.
> Ensure that subclassing BasicVertex is possible by user apps
> ------------------------------------------------------------
>
> Key: GIRAPH-36
> URL: https://issues.apache.org/jira/browse/GIRAPH-36
> Project: Giraph
> Issue Type: Improvement
> Components: graph
> Affects Versions: 0.70.0
> Reporter: Jake Mannix
> Assignee: Jake Mannix
> Priority: Blocker
> Fix For: 0.70.0
>
>
> Original assumptions in Giraph were that all users would subclass Vertex
> (which extended MutableVertex extended BasicVertex). Classes which wish to
> have application specific data structures (ie. not a TreeMap<I, Edge<I,E>>)
> may need to extend either MutableVertex or BasicVertex. Unfortunately
> VertexRange extends ArrayList<Vertex>, and there are other places where the
> assumption is that vertex classes are either Vertex, or at least
> MutableVertex.
> Let's make sure the internal APIs allow for BasicVertex to be the base class.
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