Issue No.03 - May/June (2007 vol.11)
Gregor Hohpe , Google
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/MIC.2007.68
Using procedure call semantics for distributed systems is generally considered a bad idea, so systems should communicate in a more loosely coupled way--preferably by exchanging messages. Message-based communication results in a simple interaction model and, if used with message queues, temporal decoupling between sender and receiver. Defining a conversation policy--that is, a description of all legal conversations--is an important step in establishing service contracts between providers and consumers, but doing so can be a complicated task. Luckily, this problem hasn't escaped the various standards and specification committees, so we have several approaches from which to learn.
message-based communication, request-response, Web services, conversation policy
Gregor Hohpe, "Let's Have a Conversation", IEEE Internet Computing, vol.11, no. 3, pp. 78-81, May/June 2007, doi:10.1109/MIC.2007.68