jamshally / apollo-logger

Apollo GraphQL Logger

Apollo GraphQL Logger

Installation

npm install --save-dev apollo-logger

Usage

For full logging you will need to attach Apollo Logger to:

• Apollo Link
• Apollo Express Server
• And PubSub

import { LoggingLink, wrapPubSub, formatResponse } from 'apollo-logger';

const logOptions = { logger: console.log };

const link = ApolloLink.from([
  new LoggingLink(logOptions),
  new HttpLink({uri: ...})
);

...

app.use('/graphql', bodyParser.json(), graphqlExpress({ schema: myGraphQLSchema, formatResponse: formatResponse.bind(logOptions) });

...

const pubsub = wrapPubSub(new PubSub(), logOptions);

Sample output

On each example the result of operation comes after =>

• Query:

{"data":{"post":{"id":20,"title":"Post title 20","content":"Post content 20","__typename":"Post","comments":[{"id":39,"content":"Comment title 1 for post 20","__typename":"Comment"},{"id":40,"content":"Comment title 2 for post 20","__typename":"Comment"}]}}} <= post({"id":"20"})

• Mutation:

{"data":{"addCounter":{"amount":21,"__typename":"Counter"}}} <= addCounter({"amount":1})

• Subscription

subscribe <= onPostUpdated({"endCursor":11})

• Subscription message:

{"data":{"counterUpdated":{"amount":21,"__typename":"Counter"}}} <= onCounterUpdated

• Unsubscription

unsubscribe <= onPostUpdated({"endCursor":11})

• PubSub publish on a server:

pubsub publish [ 'countUpdated',
  { id: 1, created_at: null, updated_at: null, amount: 7 } ]

• PubSub subscribe on a server:

pubsub subscribe postsUpdated => 2

• PubSub unsubscribe on a server:

pubsub unsubscribe [ 2 ]

• PubSub message generated on a server:

pubsub msg postsUpdated({"mutation":"CREATED","id":21,"node":{"id":21,"title":"New post 1"}})

License

Copyright © 2017 SysGears INC. This source code is licensed under the MIT license.