Federation Nation

GraphQL at Scale

Eve Porcello

@eveporcello

eve@moonhighway.com

Agenda

📍 Intro to Federation

📍 Working in Isolation

📍 Federated Products

📍 Lab: Snowtooth Graph

Schedule

9:00 - Start

10:00 - 10:10 - Break

11:00 - 11:10 - Break

12:00 - End

Scaling Instances

The Scale Cube

The Scale Cube

instances

The Scale Cube

microservices

The Scale Cube

partitioning

The Scale Cube

microservices

instances

partitioning

The Scale Cube

Cloning

instances

The Scale Cube

instances

The Scale Cube

Multiple on One Machine

Scaling Data

sharding

(horizontal partitioning)

The Scale Cube

Scaling Microservices

microservices

The Scale Cube

{ }

Query

Response

{ }

Query

Response

Gateway

{ }

Query

Response

supergraph

Reviews

Colors

Accounts

GraphOS

  • A platform for building, managing, and scaling a supergraph
  • Docs

Rover

  • A CLI tool that allows you to manage schemas
  • Replaces the Apollo CLI
  • Docs

Apollo Studio

  • A platform for managing your graph
  • Docs

{ }

Query

Response

Router

Reviews

Colors

Accounts

Lifts

  type Lift {
    id: ID!
    name: String!
    status: LiftStatus!
    capacity: Int!
    night: Boolean!
    elevationGain: Int!
  }
  
   enum LiftStatus {
    OPEN
    HOLD
    CLOSED
  }

This Lift isn't open now but might open later.

Trails

  type Trail {
    id: ID!
    name: String!
    status: TrailStatus!
    difficulty: Difficulty!
    groomed: Boolean!
    trees: Boolean!
    night: Boolean!
  }

  enum TrailStatus {
    OPEN
    CLOSED
  }

Only two options.

A Trail can't be on Hold.

Lifts & Trails Lab

REQUIREMENTS

  1. Create Lifts Subgraph
  2. Create Trails Subgraph
  3. Stand up the router using rover dev
  4. Send a query to both lifts and trails               

In this activity, we'll create federated lifts and trails.

Lifts go up.

Trails go down.

LIFT

TRAIL

A Lift can take you to multiple trails.

{
  "name": "Astra Express",
  "capacity": 3,
  "status": "OPEN",
  "night": false,
  "elevationGain": 899,
  "time": "8 minutes",
  "trails": [
    "blue-bird",
    "blackhawk",
    "ducks-revenge",
    "ice-streak",
    "parachute",
    "goosebumps"
  ],
  "id": "astra-express"
}
lift.trails.map((id) => ({ __typename: "Trail", id }))

LIFT

Trail IDs

Trails can be accessed by multiple Lifts.

{
  "name": "Goosebumps",
  "lift": ["astra-express", "jazz-cat"],
  "difficulty": "ADVANCED",
  "status": "OPEN",
  "groomed": false,
  "snowmaking": false,
  "trees": true,
  "night": false,
  "id": "goosebumps"
}

TRAIL

Might have more than one Lift ID

Each Lift has a

Trail that is the

"Easy Way Down".

const waysDown = trails.filter(
  trail => trail.lift.includes(lift.id)
);

return findEasiestTrail(waysDown);

Hint: Use findEasiestTrail.js and use in the resolver...

Connecting Lifts & Trails Lab

REQUIREMENTS

  1. Extend the Trail Entity to include liftAccess field
  2. Resolve trailAccess field on Lift
  3. Add easyWayDown to Lift

In this activity, we'll connect the two data types.

Hue Review

Account

Service

Review

Service

Color

Service

What We Did

Hue Review

Lift

Service

Trail

Service

What We Want to Do

Review

Service

Account

Service

Color

Service

Hue

Review

Snowtooth

What's Next

🔗 Incremental Adoption

🔗 Migrating Entities and Fields

🔗 Custom Directives

🔗 Securing Implementing Services

🔗 Value Types

Thank You!

  • Alex Banks, @moontahoe
  • Eve Porcello, @eveporcello
  • Website: www.moonhighway.com
  • Mailing List: bit.ly/moonhighway
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