The Publish-Subscribe Pattern on Rails: An Implementation Tutorial | Toptal®

The publish-subscribe pattern (or pub/sub, for short) is a Ruby on Rails messaging pattern where senders of messages (publishers), do not program the messages to be sent directly to specific receivers (subscribers). Instead, the programmer “publishes” messages (events), without any knowledge of any subscribers there may be. Similarly, subscribers express interest in one or more events, and only re

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after_xxx などの callback を pub/sub モデルでリファクタリングする話