New option in HttpRetriver datasource [Scada-LTS]

in #utopian-io6 years ago (edited)

New option in HttpRetriver datasource

start.png

Issue: #715

The task involved:

Adding the option to disable the HttpRetriver when the remote server from which we retrieve data is not available.

We need this functionality because a datasource that can not connect to the server repeatedly (downloading data after http) creates a lot of events and unnecessary logs into the system.

How options stop in HttpRetriver works.

Examples:

  1. The program attempts to connect and waits up to 30 seconds for the server to respond; when not connected, it turns off the data source, because the option stop is true.

       URL:  http://localhost:8080/greeting
       Timeout: 30 [s] 
       Retries: 0
       Stop: true
    

    Remote server is available but not responding:

    1.png

    Remote server is not available:

    1.1.png

  2. The program attempts to connect and waits up to 30 seconds for the server to respond;
    and retries 3 times, when not connected, it turns off the data source, because the option stop is true.

    URL:  “http://localhost:8080/greeting”
    Timeout: 30 (s)
    Retries: 3
    Stop: true
    

    WARNING: When the program is trying to connect, so for approximately 90 sec. (3*30”), datasource cannot be switched off or updated.

    Resolve: To prevent this situation, set the timeout as little possible.

    Remote server is available but not responding:
    2.png

    Remote server is not available:
    2.1.png

Changes have been introduced to the released version 0.0.9.7

https://github.com/SCADA-LTS/Scada-LTS/releases

Pull request:

https://github.com/SCADA-LTS/Scada-LTS/pull/717

Sort:  

Thanks for the contribution, @grezesiekb! Although it is a small contribution it's great to see you managed to resolve the issue!

I think it would've been great if you added a function declaration to the getData() function describing what each parameter is/does. Other than that there is not much to give feedback on, so I would just like to say: keep up the great work!


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Thank you for your review, @amosbastian!

So far this week you've reviewed 21 contributions. Keep up the good work!

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