API Observability TelemetryEventListener

Event listener that forwards domain events to the telemetry provider. This decouples business logic from telemetry by using events to communicate what happened without the business logic needing to know about telemetry.

Table of Contents

• Namespace

• Source

• Implements

• Related Classes

• Methods

• onHttpRequestSent()

  • onHttpResponseReceived()
  • onOperationCompleted()
  • onOperationStarted()

Namespace

OpenFGA\Observability

Source

View source code

Implements

• TelemetryEventListenerInterface

Related Classes

• TelemetryEventListenerInterface (interface)

Methods

onHttpRequestSent

public function onHttpRequestSent(OpenFGA\Events\HttpRequestSentEvent $event): void

Handle HTTP request sent events. Records telemetry data when an HTTP request is sent, including request method, URL, body size, and OpenFGA-specific context like operation, store ID, and model ID.

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Parameters

Name	Type	Description
$event	HttpRequestSentEvent	The HTTP request sent event

Returns

void

onHttpResponseReceived

public function onHttpResponseReceived(OpenFGA\Events\HttpResponseReceivedEvent $event): void

Handle HTTP response received events. Records telemetry data when an HTTP response is received, including response status, body size, and any exception information if the request failed.

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Parameters

Name	Type	Description
$event	HttpResponseReceivedEvent	The HTTP response received event

Returns

void

onOperationCompleted

public function onOperationCompleted(OpenFGA\Events\OperationCompletedEvent $event): void

Handle operation completed events. Records telemetry data when an OpenFGA operation completes, including success status, operation context, and exception details if the operation failed.

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Parameters

Name	Type	Description
$event	OperationCompletedEvent	The operation completed event

Returns

void

onOperationStarted

public function onOperationStarted(OpenFGA\Events\OperationStartedEvent $event): void

Handle operation started events. Records telemetry data when an OpenFGA operation begins, including operation type, store context, and model information.

View source

Parameters

Name	Type	Description
$event	OperationStartedEvent	The operation started event

Returns

void