Siddhi logical AND with within, executes callback unexpectedly

Question

Using Siddhi CEP 3.1.2 as standalone library, I am using try figure out how to correctly trigger the callback handler under a number of conditions.

1. Two events joined by logical AND

   a AND b

I find with the above that if i provide both events, then i can trigger the callback handler, however I've also seen that if i subsequently provide either a or b then the handler is also triggered. I did not expect the latter to happen as I assumed there would be no match due to the previous execution of the handler... Is there a way to clear the streams following a successful match?

2. Two events joined by logical AND including a within.

   a AND b within 5 sec

I've also found in the second case, that the "within" option is seemingly ignored. The callback is triggered regardless of the time gap between the events a and b.

Have I misunderstood the Siddhi documentation? I'd appreciate any guidance on these. Thanks

Answer 1

These are two bugs based on our testing and fixed with the PR #436.

The following test cases are added to ensure the correct behavior:

1. Test A and B
2. Test every (A and B)
3. Test A -> B and C within 1 sec

You will get these fixes from the next release onwards or else you can build Siddhi from source and test them right now. Here is a blog post on how to build and use Siddhi from source: Siddhi 4.0.0 Early Access.