[HAMA-838] Add custom aggregators

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.6.3
• Fix Version/s: 0.6.4
• Component/s: graph
• Labels: features patch
• Assignee: Anastasis Andronidis
• Reporter: Anastasis Andronidis
• Created: 06/Jan/14 09:01
• Updated: 02/Apr/14 10:41
• Resolved: 02/Apr/14 10:41

Description

This is a patch that adds custom aggregators.

I also wrote an example of how you can use them.

Implementation features:

• Register the aggregators by name.
• Custom aggregators are skipped when there are no messages to process