A collection of helper classes to perform topic dispatch with JCSMP, which includes utilities to do Solace topic subscription-style matching against topics.
This was written with Direct messaging in mind, but it should work fine for queues as well (FlowReceiver.onReceive()). I think, I'll have to test.
Probably the file to check out is TopicUtil.java
in the "lib" which has the topic matching logic. I have implemented a regex-style matching (which is more portable b/c
you can just convert your subscription into a regex, and use it elsewhere), or a more performant linear scan algorithm, comparing char-by-char.
My utilities assume a subscription is "well-formed". That is, wildcard chars * and > are not used as literals in the subscription, and there are no empty levels
in the subscription. See the Solace docs on wildcards for more info.
Recall:
*is a single-level wildcard, matches 0-or-more chars up to the next/level>is a multi-level wildcard, must occur at the end of a subscription following a/, and matches the rest of the topic
More here.
Explanations on how to use.
Threading issues?
Interesting internal Slack convo for my Solace colleagues: https://solacedotcom.slack.com/archives/C627M1NKA/p1692385333575059