Application Integration approach
Use Messaging to transfer packets of data frequently, immediately, reliably, and asynchronously (ASynch), using customizable formats. http://www.enterpriseintegrationpatterns.com/Messaging.html
Dec'2011: James Cook identifies 5 Message Queue patterns: Task Queue, Delayed Job, Fan Out, Message Group, RPC. He then categorizes some tools/libraries by pattern (and other params). (Includes Python-based Celery.)
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