Details
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Type:
extRequest
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Status: Closed
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Priority:
Major
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Resolution: Done
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Fix Version/s: 2021
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Component/s: FIWARE-TECH-HELP
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Labels:None
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Sender Email:
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HD-Chapter:Data
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HD-Enabler:CEP
Description
Dear Tech Support,
In our project we need to use PROTON CEP for sensor alerts. I have already sent you before our most urgent problem (HELP-5285) but now we have new ones.
Our general problem that the user interface where the conditions can be set is not comfortable enough and we found some strange issue on it (too small and not flexible window on the form, some field are cannot be changed, delete function is not valid everywhere etc. - we hope these are initial "disesaes").
Now I send you the most important issues:
1. If we change the condition in one event we have to restart tomcat/proton engine on the server. It is very uncomfortable to always use command line during the configuration work and do it after every change. Why not take effect immediately and automatically without using command line?
2. The "Count" function gives the same result as "Sum". How can we use this aggregate function if we want to count simply the number of rows? Can we also count non-numeric values?
3. We could not find examples especially not for sensor related (iOT) alerts in the document. It would be very useful for us the review some lifelike examples (both general description and details). Is there anywhere?
Thanks in advance,
Zora Barta
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Activity
Dear Tali,
Thanks for the information. We review the examples. We hope many new cases appears in the future.
Best regards,
Zora
Dear Zora,
Yes, we are aware that the user interface has such issues. We will try to handle them in next releases.
As for your other issues:
1. I agree that for the testing phase this would be more convenient. However for production phase, there shouldn't be such an easy way to change the CEP application while it is running.
2. For a count variable you should put 1 for the value of an input event. This way it will count the number of events. This will allow you do compute a weighted count as well.
3. We created a livedemo project based on IOT scenario, but I don't think we have documentation for it (attached). We have documentation for another sample project (not IOT based) with several EPAs and contexts. You can see it (documentation + definitions) at:
https://github.com/ishkin/Proton/tree/master/documentation/sample/fraud
Best regards,
Tali