vertex program api spec

[wweic]

Here is discussion thread of IAlgorithm API.

Following are confirmed API:

1. gather_type gather(icontext_type& context, const vertex_type& vertex, edge_type& edge)
2. void apply(icontext_type& context, vertex_type& vertex, const gather_type& total)
3. void scatter(icontext_type& context, const vertex_type& vertex, edge_type& edge)
4. void beforeIteration(icontext_type& context, const vertex_type& vertex)
5. void afterIteration(icontext_type& context, const vertex_type& vertex)

[thinxer]

Aggregator has been added too.

On Tue, Mar 26, 2013 at 6:48 PM, Wei Chen [email protected] wrote:

Here is discussion thread of vertex program API.

Following are confirmed API:

1. gather_type gather(icontext_type& context, const vertex_type& vertex,
   edge_type& edge)
2. void apply(icontext_type& context, vertex_type& vertex, const
   gather_type& total)
3. void scatter(icontext_type& context, const vertex_type& vertex,
   edge_type& edge)

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[wweic]

As I said "Now the aggregator will not be cleared in any iteration". I think user can make their own choice in beforeIteration and afterIteration.

[thinxer]

Sorry I added the comment by email and hadn't noticed that you have updated the issue.

[wweic]

@neozhangthe1 , we need a before_iteration and after_iteration interface, these apis will update vertex program's status before iteration. Use cases like if I want to count active node in a graph, I must check the activated flag of every vertex, which can be initialized in before_iteration.