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@Allan Li have you had a look at this - https://signoz.io/blog/monitoring-graphql/

Thank you, I have set up signoz with my project. How can we access the data from the

responseHook

field of the

GraphQLInstrumentation

module from

@opentelemetry/instrumentation

as shown in the example from the Signoz traces UI? Can we somehow modify the status of the span according to the `responseHook`(for example if

responseHook

shows an error that was caught, then the color of the span in the UI will change color)? Or would we have to query for the

errors

field in

responseHook

periodically and set up some type of alert system? Thanks again.

cool

Sure, while integrating the

GraphQLInstrumentation

module from

@opentelemetry/instrucmentataions-graphql

library, we see that the

responseHook

field provides two variables we can work with:

span

and

data

. The

data

object will return the response of your GraphQL operation. The

errors

field in

data

will not be empty if there is something wrong with your operation. Given this information we can edit the

span

object (which corresponds to the actual span opentelemetry will send to SigNoz) by adding custom attributes or attach exception to reflect that an error has occurred. To make the error spans for visible we can use

span.setStatus(SpanStatusCode.ERROR)

to indicate that something is wrong with the span, and SigNoz will mark this span as red or we can easily query for it. We can attach the error message from

data.errors

to some attribute with

span.setAttribute()

, which will make the value visible on the attributes sidebar on the SigNoz traces UI.

thanks for sharing this @Allan Li

hi @Allan Li could you make an example of how do I have put in the responseHook? (in the ??? place).

getNodeAutoInstrumentations(),
      new GraphQLInstrumentation({
        allowValues: true,
        responseHook: ???
      }),],