| 摘要 |
A method of controlling the retention of publications in a publish/subscribe system, the method comprising receiving, at a message broker, a first publication from a publisher on a topic; receiving, at the message broker, a second publication from the publisher on the topic; identifying, at the message broker, whether the first publication should be overwritten with the second publication and, if not, retaining at least payload data from both the first and second publications on the topic; and storing, for the second publication, if retained, data indicating when the second publication was published to the broker. Other methods, apparatus, and computer readable media are also provided.
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