		## Apollo GraphQL Logger

		## Installation

		```bash
		npm install --save-dev apollo-logger
		```

		## Usage

		For full logging you will need to attach Apollo Logger to:
		- Network interface
		- Subscription manager
		- And PubSub

		``` js
		import { addApolloLogging } from 'apollo-logger';

		let networkInterface = addApolloLogging(createBatchingNetworkInterface({
		...
		}));

		const pubsub = addApolloLogging(new PubSub());

		const subscriptionManager = addApolloLogging(new SubscriptionManager(...));
		```

		## Sample output

		On each example the result of operation comes after `=>`

		- Query:
		``` js
		getPost({"id":"3"}) => {"data":{"post":{"id":"3","title":"Post title 3", "__typename":"Post"}}}
		```

		- Mutation:
		``` js
		addCount({"amount":1}) => {"data":{"addCount":{"amount":17,"__typename":"Count"}}}
		```

		- Subscription
		``` js
		onCountUpdated({}) => subscription: 2
		```

		- Subscription message:
		``` js
		{"commentUpdated":{"mutation":"CREATED","id":"3003", ... ,"__typename":"UpdateCommentPayload"}}
		```

		- Unsubscription
		``` js
		unsubscribe from subscription: 2
		```

		- PubSub publish on a server:
		``` js
		pubsub publish [ 'countUpdated',
		{ id: 1, created_at: null, updated_at: null, amount: 7 } ]
		```

		- PubSub subscribe on a server:
		``` js
		pubsub subscribe postsUpdated => 2
		```

		- PubSub unsubscribe on a server:
		``` js
		pubsub unsubscribe [ 2 ]
		```

		- PubSub message generated on a server:
		``` js
		pubsub msg postsUpdated({"mutation":"CREATED","id":21,"node":{"id":21,"title":"New post 1"}})
		```

		- PubSub filter check on a server:
		``` js
		pubsub filter postsUpdated(opts = {"query":...,"context":{}}, args = {"endCursor":10}, name = postsUpdated)
		.postsUpdated(val = {"mutation":"CREATED","id":21,"node":{"id":21,"title":"New post 1"}}, ctx = {}) => true
		```

		## License
		Copyright © 2017 [SysGears INC]. This source code is licensed under the [MIT] license.

		[MIT]: LICENSE
		[SysGears INC]: http://sysgears.com

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