In this post to his site Paul Jones looks at the combination of the Action-Domain-Responder pattern and the Command Bus pattern in application development. In the post he answer the question about how they fit together.
Over the past few weeks, different people have asked me where a Command Bus goes in an Action-Domain-Responder system. While I’m not a DDD expert, after brushing up on the subject a little, my answer is: "In the Domain."
He starts by reviewing the three pieces of the ADR pattern with brief descriptions of each. The then covers the Command Bus pattern, linking to several other resources with more details about the pattern itself and a quick summary of their main points. He talks about how the overall structure is a part of the Command Query Responsibility Segregation pattern and suggests that, since the Command Bus pattern is a "fire and forget" kind of thing it belongs in the Domain of ADR. He gives a brief code example and answers other questions about validation and error handling as a part of this suggested flow.