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LIBERTY BIKES
An online game for 1-4 players Built on microservices
LIBERTY BIKES An online game for 1-4 players Built on microservices - - PowerPoint PPT Presentation
LIBERTY BIKES An online game for 1-4 players Built on microservices - - PowerPoint PPT Presentation
LIBERTY BIKES An online game for 1-4 players Built on microservices What is Liberty Bikes? What is Liberty Bikes? Objective: be the last player alive Join a game by entering a code Bikes move at the same speed Each round
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What is Liberty Bikes?
- Objective: be the last player alive
- Bikes move at the same speed
- Bikes leave a trail
- Players steer up/down/left/right
- Hit any obstacle, trail, or player,
and you’re out!
- Join a game by entering a code
- Each round lasts about 1 minute
- Stats for each player are tracked
across rounds
- Play a few games, then come
back later to see if you still hold the top spot
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Player Service (REST) Auth Service (REST) Game Service
(REST + websockets)
DB UI (Angular)
Overall Design
SSO providers (Google, Twitter, GitHub)
Non-Java frontend
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Player Service (REST) Auth Service (REST) Game Service
(REST + websockets)
DB UI (Angular)
Overall Design
SSO providers (Google, Twitter, GitHub)
CPU + I/O intensive
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Player Service (REST) Auth Service (REST) Game Service
(REST + websockets)
DB UI (Angular)
Overall Design
SSO providers (Google, Twitter, GitHub)
Internal REST calls
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Player Service (REST) Auth Service (REST) Game Service
(REST + websockets)
DB UI (Angular)
Overall Design
SSO providers (Google, Twitter, GitHub)
Persistent data
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Player Service (REST) Auth Service (REST) Game Service
(REST + websockets)
DB UI (Angular)
Overall Design
SSO providers (Google, Twitter, GitHub)
External REST calls
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Player Service (REST) Auth Service (REST) Game Service
(REST + websockets)
DB UI (Angular)
Overall Design
SSO providers (Google, Twitter, GitHub)
Single-Sign On auth
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Benefits of Microservices Architecture
Player Service (REST) Auth Service (REST) (REST + websockets) SSO providers DB UI (Angular)
- Independently scale services
(REST + websockets) (REST + websockets) (REST + websockets) Game Service (REST + websockets)
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Benefits of Microservices Architecture
Player Service v1 (REST)
Auth Service (REST) Game Service (REST + websockets) SSO providers DB UI (Angular)
- Independently scale services
- Develop services independently
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Benefits of Microservices Architecture
Player Service (REST) Auth Service (REST) Game Service (REST + websockets) SSO providers DB UI (Angular)
- Independently scale services
- Develop services independently
- Continuous delivery/deployment
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Benefits of Microservices Architecture
Player Service (REST) Auth Service (REST) Game Service (REST + websockets) SSO providers DB UI (Angular)
- Independently scale services
- Develop services independently
- Continuous delivery/deployment
- Language/framework freedom
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Benefits of Microservices Architecture
Player Service (REST) Auth Service (REST) Game Service (REST + websockets) SSO providers DB UI (Angular)
- Independently scale services
- Develop services independently
- Continuous delivery/deployment
- Language/framework freedom
- Fault/security isolation
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Difficulties of Microservices Architecture
- Lots of service-service calls
- More points of failure
- Reconfigure for dev/prod
- Handling authentication
- MP Rest Client + JAX-RS
- MP Fault Tolerance
- MP Config
- MP JWT
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The tech stack
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8
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Configure required features
Liberty server.xml includes the needed features
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Rest Client
GET https://github.com/login/oauth/access_tokenclient_id=foo&client_secret=foo&…
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MicroProfile Rest Client
GET https://github.com/ login/oauth/ access_token ?client_id=foo&client_secret=foo&…
- Dorg.libertybikes.auth.service.github.GitHubOAuthAPI/mp-rest/url=https://github.com
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MicroProfile Fault Tolerance
Player Service (REST) Game Service (REST + websockets) DB
3x
- @Retry
- @Timeout
- @CircuitBreaker
- @Fallback
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MicroProfile Config
$ export auth_url=https://production.com/auth-service $ export github_key=superSecret
Required Optional Override
java.util.NoSuchElementException: CWMCG0015E: The property foo was not found in the configuration
Validation
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JSON Web Tokens (JWT)
eyJhbGciOiJIUzI1NiI sInR5cCI6IkpXVCJ9. eyJzdWIiOiIxMjM0N TY3ODkwIiwibmFtZS I6IkpvaG4gRG9lIiwia WF0IjoxNTE2MjM5M DIyfQ.VfiYwvArp2lN V6UgpwgqrqfbJp9Q pMdv07M8ZI4u4Vkw liFtz67lkDF8keyGciql
payload
{ “alg”: “RS256”, “typ”: “JWT” } { “iss”: “libertybikes.com”, “sub”: “Andy”, ”groups”: [ “admin”, “user” ], … } RS256( BASE64(header), BASE64(payload), secret)
header signature
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JSON Web Tokens (JWT)
- Many different libs
- Each supports
different claims
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MicroProfile JWT
BASIC CUSTOM
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MicroProfile OpenAPI
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