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    apollo-request-tracer

    1.0.3 • Public • Published

    Apollo Request Tracer

    Extension for tracing GraphQL query resolution in ApolloServer

    Primary motivation of this lib is tracking cold and warm start performance of GraphQL in serverless environments (AWS Lambda, Google Cloud Functions)

    Install

    yarn add apollo-request-tracer@1.0.2
    

    Usage

    // Create a new tracer
    const Tracer = require('apollo-request-tracer');
    const tracer = Tracer.start();
     
    // Create a timer tracking how long node module import takes
    let requireTimer = tracer.time('module_requires');
    const Express = require('Express');
    const {ApolloServer, gql} = require('apollo-server-express');
    const Functions = require('firebase-functions');
    const Models = require('./Models');
    // Stop the timer
    requireTimer.stop();
     
    // Create a timer tracking how long the initial GraphQL setup takes
    let setupTimer = tracer.time('graphql_setup');
     
    const typeDefs = gql`
      type Query {
        hello(name: String): String
      }
    `;
     
    const resolvers = {
      Query: {
        hello: async (args, context)=> {
          // Request tracer gets added to resolver context and can be used
          // for adding timing information specific to that resolver
          const {tracer} = context;
          const timer = tracer.time('build_hello_message');
          const message = `Hello ${args.name}!`;
          timer.stop();
          return message;
        }
      }
    };
     
    // Create a new ApolloServer with tracer extension that tracks
    // the graphql query resolution process
    const server = new ApolloServer({
      typeDefs,
      resolvers,
      extensions: [tracer.request]
    });
     
    const app = Express();
    server.applyMiddleware({app, path: '/'});
     
    module.exports = {
      graphql: Functions.https.onRequest(app);
    };
     
    // Stop setup timer and tracer
    setupTimer.stop();
    tracer.stop();

    Keywords

    none

    Install

    npm i apollo-request-tracer

    DownloadsWeekly Downloads

    3

    Version

    1.0.3

    License

    MIT

    Unpacked Size

    6.03 kB

    Total Files

    8

    Last publish

    Collaborators

    • stephenhandley