api centric patterns

PatternsForAPI CentricArchitecture

Daniel Cerecedo@dcerecedo

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StatelessStateless

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StatelessStateless

Client/Server

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StatelessStateless

It's all about CLIENT STATE,not about the

global state of the system

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StatelessStateless

Client requests provideALL the context thatthe Server needs to

Determine Client state

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StatelessStateless

The state of the client is part of the payload

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StatelessStateless

Stateless servers are core to

HORIZONTAL SCALING

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Common ContractCommon Contract

Exchange protocol

Message format

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Common ContractCommon Contract

Exchange protocol

Message format

Coupling

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Common ContractCommon Contract

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OrchestrationOrchestration

2

1

3

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OrchestrationOrchestration

2

1

3

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Mediation RouterMediation Router

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Mediation RouterMediation Router

Intelligently ROUTES and TRANSFORMS messages, and

handles endpoint ERRORS

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Mediation RouterMediation Router

✔ Load BalancerSpecify a group of components among which to load balance requests

✔ Dead LetterDeclare error conditions, retry policies and where to deliver the message on failure

✔ Content Based RoutingRoute a message to different endpoints based of its contents

✔ Dynamic RouterRoute a message to different endpoints based on the state of the system

✔ NormalizerTransform messages from heterogeneous formats into a common format

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Mediation RouterMediation Router

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Mediation RouterMediation Router

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Message BrokerMessage Broker

A Message Broker supportsALL communication models:✔ Publish/Subscribe✔ Sync RPC✔ Async RPC

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Message BrokerMessage Broker

A Message BrokerGUARANTEES the delivery

of a message

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Service RegistryService Registry

Netflix Eureka

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Service RegistryService Registry

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Load BalancerLoad Balancer

Netflix Ribbon

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Circuit BrakerCircuit Braker

Netflix Hystrix

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Service DiscoveryService Discovery

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Service DiscoveryService Discovery

Discovery client automatically resolves service names through the service registry

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Service DiscoveryService Discovery

Client load balancer caches service instance locations to support service resolution in case the registry failure

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Service DiscoveryService Discovery

Client load balancer selects a service instance among all available

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Circuit BreakerCircuit Breaker

If we are unable to service a request we can shortcircuit and fallback graciously

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StatelessService Discovery

Load BalancerCircuit Braker

Micro Services

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Micro ServicesMicro ServicesMy wayMy way

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Micro ServicesMicro ServicesMy wayMy way

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ContainerizationContainerization

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ContainerizationContainerization

Strict separation betweenbuild, release and run.

Releases are APPEND ONLY

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ContainerizationContainerization

Infrastructure is IMMUTABLE

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ContainerizationContainerization

Services are exportedvia PORT BINDING

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ReferencesReferences

Spring CloudUsing cloud components with spring, specially Netflix OSShttp://projects.spring.io/spring-cloud/Flux CapacitorJava-based, cloud-native, reference architecture using many Netflix Open Source projectshttps://github.com/cfregly/fluxcapacitor12 Factor APPMethodology for building software-as-a-service appshttp://12factor.net/ShipyardComposable docker managementhttp://shipyard-project.com/

?ThanksThanksMerciMerciGraciasGracias

http://byteflair.comDaniel Cerecedo

@dcerecedo