Step by Step Guide to Building a New Relic API Integration in Go

Introduction

Hey there, fellow Go enthusiast! Ready to supercharge your monitoring game? Let's dive into building a New Relic API integration using Go. New Relic's powerful API opens up a world of possibilities for custom monitoring solutions, and with Go's efficiency, we're in for a treat.

Prerequisites

Before we jump in, make sure you've got:

• Go installed (you're a Gopher, right?)
• A New Relic account with an API key
• Your Go skills polished and ready to roll

Setting up the project

First things first, let's get our project off the ground:

mkdir new-relic-integration
cd new-relic-integration
go mod init github.com/yourusername/new-relic-integration
go get github.com/newrelic/go-agent/v3/newrelic

Initializing the New Relic client

Now, let's get that New Relic client up and running:

package main

import (
    "github.com/newrelic/go-agent/v3/newrelic"
    "os"
)

func main() {
    apiKey := os.Getenv("NEW_RELIC_API_KEY")
    client, err := newrelic.NewClient(apiKey)
    if err != nil {
        panic(err)
    }
    // You're all set to use the client!
}

Implementing key API functionalities

Fetching application data

Let's grab some app data:

apps, err := client.ListApplications()
if err != nil {
    // Handle error
}
for _, app := range apps {
    fmt.Printf("App: %s, ID: %d\n", app.Name, app.ID)
}

Sending custom events

Spice things up with custom events:

event := newrelic.Event{
    EventType: "CustomEvent",
    Attributes: map[string]interface{}{
        "key": "value",
    },
}
err = client.RecordCustomEvent(event)

Querying NRQL

Time to flex those NRQL muscles:

query := "SELECT average(duration) FROM Transaction SINCE 1 hour ago"
results, err := client.QueryNRQL(query)

Error handling and best practices

Always check for errors, folks! And remember, New Relic has rate limits, so be nice:

if err != nil {
    log.Printf("Error: %v", err)
    // Maybe implement exponential backoff here
}

Testing the integration

Don't forget to test! Here's a quick example:

func TestFetchApps(t *testing.T) {
    client := newMockClient()
    apps, err := client.ListApplications()
    assert.NoError(t, err)
    assert.Len(t, apps, 2)
}

Deployment considerations

Keep those API keys safe:

apiKey := os.Getenv("NEW_RELIC_API_KEY")
if apiKey == "" {
    log.Fatal("NEW_RELIC_API_KEY environment variable not set")
}

Advanced topics

Want to level up? Look into webhooks and the GraphQL API. They're game-changers!

Conclusion

And there you have it! You've just built a New Relic API integration in Go. Pretty cool, right? Remember, this is just the beginning. The New Relic API has tons more to offer, so keep exploring and building awesome things!

Happy coding, Gophers! 🚀