SpringOne 2020 Oleg Zhurakousky: Software Engineer, VMware

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Spring Cloud Functions
write once run anywhere!
SpringOne 2020
Oleg Zhurakousky
Spring Engineering

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● Scope
● Deep(ish) dive into Spring Cloud Function
● Run anywhere part
Spring Cloud Function - agenda

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java.util.function.Supplier<?>
java.util.function.Function<?,?>
java.util.function.Consumer<?>
POJO function
Spring Cloud Function - scope

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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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Why Spring Cloud Function

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FUNCTION
Why Functions?
uppercase

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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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RabbitMQKafka
Messaging
Why Functions?
uppercase

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Why Functions?
uppercase

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<Demo>

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● Functions are simple, expressive, extensible and portable
● Most if not all requirements could be expressed with functions.
● Testing your functional application becomes very simple - you only
need to test the function itself
● And list of benefits goes on. . .
Summary!

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