Datadog integration

Overview

This guide will walk through how to send Eppo feature flag assignments as RUM data to Datadog. This functionality enhances your ability to monitor user experience and performance by enabling you to identify which users are exposed to a particular feature and assess whether any introduced change impacts the user experience or degrades performance.

Enhancing your real-user monitoring data with feature flag information allows you to verify that new features are launched smoothly, without inadvertently introducing bugs or performance regressions. This added level of visibility enables you to establish connections between feature releases and performance metrics, rapidly identify issues tied to specific releases, and expedite troubleshooting efforts.

info

This example assumes there is a feature flag set up in Eppo and the Datadog RUM SDK set up.

Setup

Javascript

Initialize Eppo's SDK and create an assignment logger that additionally reports feature flag evaluations to Datadog using the snippet of code shown below.

For more information about initializing Eppo's SDK, see Eppo's JavaScript SDK documentation

const assignmentLogger: IAssignmentLogger = {
  logAssignment(assignment) {
    datadogRum.addFeatureFlagEvaluation(assignment.featureFlag, assignment.variation);
  },
};

await eppoInit({
  apiKey: "<API_KEY>",
  assignmentLogger,
});

iOS

Initialize Eppo's SDK and create an assignment logger that additionally reports feature flag evaluations to Datadog using the snippet of code shown below.

For more information about initializing Eppo's SDK, see Eppo's iOS SDK documentation

func IAssignmentLogger(assignment: Assignment) {
  RUMMonitor.shared().addFeatureFlagEvaluation(featureFlag: assignment.featureFlag, variation: assignment.variation)
}

let eppoClient = EppoClient(apiKey: "mock-api-key", assignmentLogger: IAssignmentLogger)

Android

Initialize Eppo's SDK and create an assignment logger that additionally reports feature flag evaluations to Datadog using the snippet of code shown below.

For more information about initializing Eppo's SDK, see Eppo's Android SDK documentation

AssignmentLogger logger = new AssignmentLogger() {
    @Override
    public void logAssignment(Assignment assignment) {
      GlobalRumMonitor.get().addFeatureFlagEvaluation(assignment.getFeatureFlag(), assignment.getVariation());
    }
};

EppoClient eppoClient = new EppoClient.Builder()
    .apiKey("YOUR_API_KEY")
    .assignmentLogger(logger)
    .application(application)
    .buildAndInit();

React Native

Initialize Eppo's SDK and create an assignment logger that additionally reports feature flag evaluations to Datadog using the snippet of code shown below.

For more information about initializing Eppo's SDK, see Eppo's React native SDK documentation

const assignmentLogger: IAssignmentLogger = {
  logAssignment(assignment) {
    DdRum.addFeatureFlagEvaluation(assignment.featureFlag, assignment.variation);
  },
};

await eppoInit({
  apiKey: "<API_KEY>",
  assignmentLogger,
});

For more information, read Datadog's Getting Started with Feature Flag Data in RUM documentation.

You can install Eppo's Datadog integration here