[zeromq-dev] Exact matching on subscription topics

[Stephen Lord]

> Yes. Agreed. Complex filtering, even SQL-like filters offered by some 
> enterprise middleware implementations, is probably out-of-scope for 0MQ.
> 
> However, few simple filtering algorithms (exact, prefix, regexp?) that 
> can be performed at wire speed may be in scope.
> 
> The question here is how to implement the latter.
> 
> The important point is that the filtering algorithm should be 
> distributed to every node in the message distribution tree. Thus, 
> supplying a callback function at the subscriber won't do.
> 
> I suggest reading the past posts in this thread. There's a disucssion of 
> the algorithm that would allow for new filtering algorithms that 
> wouldn't break the old intermediate nodes not aware of the new algorithm.
> 
> Martin

I just saw this topic pop up in my email, while in another window I was
reading something on compression algorithms, and discussion of fast
prefix matching....

Perhaps this is a component of what you are looking for:

http://fastcompression.blogspot.com/2011/12/fast-sequence-comparison.html

Steve

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