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Issue No. 03 - May/June (2007 vol. 11)
ISSN: 1089-7801
pp: 78-81
Gregor Hohpe , Google
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

G. Hohpe, "Let's Have a Conversation," in IEEE Internet Computing, vol. 11, no. , pp. 78-81, 2007.
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