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Custom REST sensor for to pull our the last json array value

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Dear community.

i have an api that i need to pull from it some metric json data. the issue is that the API can allways return me the last 30 min. i need to find a way to take the last json array value ( which has the last updated value) -see image on the below link

i used this Extraction query to pull our the last timeslices $.metric_data.metrics[0].timeslices[(@.length-1)].values see below link

now how can i implemant this with Custom Rest senson , i dindnt manage to create a good tamplate scrip to do this. from the last value i want to pull only average_response_time and requests_per_minute

[
    {
        "average_response_time": 13.9,
        "calls_per_minute": 289,
        "call_count": 289,
        "min_response_time": 7.34,
        "max_response_time": 147,
        "average_exclusive_time": 13.9,
        "average_value": 0.0139,
        "total_call_time_per_minute": 4.04,
        "requests_per_minute": 289,
        "standard_deviation": 11.5
    }
]

appreciate your help on this

custom-sensor jsonpath rest

Created on May 1, 2018 6:12:06 PM by  Spiralsolutions (0) 1

Last change on May 2, 2018 7:10:01 AM by  Luciano Lingnau [Paessler Support]



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Hi there,

Took me some time to recreate. However in the manual is described how you get the last object of an array (under "Slice"):
https://www.paessler.com/manuals/prtg/rest_custom_sensor

So basically use the following path in the template:

$.metric_data.metrics[0].timeslices[-1:].values.average_response_time
$.metric_data.metrics[0].timeslices[-1:].values.requests_per_minute

Let me know if it works out for you.

Best regards.

Created on May 7, 2018 12:04:24 PM by  Dariusz Gorka [Paessler Support]



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