SpringOne 2020 Spencer Gibb: Spring Cloud Core Lead, VMware; Oleg Zhurakousky: Software Engineer, VMware

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Reactive Streams

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Back Pressure
SURE THING
GIMME!Responde
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Requester
HELP !!!!
Responde
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BETTER?
Reactive
Subscriber
Reactive
Subscriber
Reactive
Subscriber
Requester
Requester

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Reactive Streams
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http://rsocket.io

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RSocket

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RSocket

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RSocket

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● RSocket
● RSocketRequester @MessageMapping
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RSocket Programming Models

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Spring Cloud Function

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FUNCTION
Why Functions?
uppercase

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HTTP
Why Functions?
post/get/... uppercase

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RSocket
Why Functions?
requestResponse() uppercase

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RSocket
Why Functions?
requestResponse()
fireAndForget()
requestStream()
uppercase

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Serverless platforms
Why Functions?
AWS/Azure/Google
uppercase

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RabbitMQSolace
Why Functions?
uppercase

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● Promote implementation of business logic via java Functions
● Uniformed and portable programming model
○ Transparent Type Conversion
○ Function Composition
○ POJO functions (if it looks/smells like a function it must be a function)
○ Reactive support
○ Deployment of packaged functions
○ Arity - functions with multiple inputs/outputs
● Integration with serverless platforms
○ Amazon AWS
○ Google Cloud Functions
○ Microsoft Azure
Spring Cloud Function

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<Demo>

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Spring Cloud Function
&
RSocket

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● Binds/Maps functions to RSocket operations
● Supports multiple RSocket operations per function
● Distributed Function composition
● Imperative or Reactive functions
● Function Routing
Spring Cloud Function & RSocket
requestResponse()
fireAndForget()
requestStream()
uppercase

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Routing Function & RSocket
requestResponse()
fireAndForget()
requestStream()
functionRouter
uppercase
lowercase

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<Demo>

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Summary!

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Summary!

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RSocket Routing Broker
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RSocket Routing Broker
Client
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Client
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Client
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<Demo>

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Thank you!