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Functions: Implement Once, Execute Anywhere!

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VMware Tanzu
VMware Tanzu

SpringOne 2020 Oleg Zhurakousky: Software Engineer, VMware

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Confidential │ ©2019 VMware, Inc. Spring Cloud Functions write once run anywhere! SpringOne 2020 Oleg Zhurakousky Spring Engineering
Confidential │ ©2019 VMware, Inc. 2 ● Scope ● Deep(ish) dive into Spring Cloud Function ● Run anywhere part Spring Cloud Function - agenda
Confidential │ ©2019 VMware, Inc. 3 java.util.function.Supplier<?> java.util.function.Function<?,?> java.util.function.Consumer<?> POJO function Spring Cloud Function - scope
Confidential │ ©2019 VMware, Inc. 4 ● 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
Confidential │ ©2019 VMware, Inc. 5 <Demo>
Confidential │ ©2019 VMware, Inc. 6 Why Spring Cloud Function
Confidential │ ©2019 VMware, Inc. 7
Confidential │ ©2019 VMware, Inc. 8 FUNCTION Why Functions? uppercase
Confidential │ ©2019 VMware, Inc. 9 FUNCTION Why Functions? uppercase
Confidential │ ©2019 VMware, Inc. 10 HTTP Why Functions? post/get/... uppercase
Confidential │ ©2019 VMware, Inc. 11 RSocket Why Functions? requestResponse() uppercase
Confidential │ ©2019 VMware, Inc. 12 RSocket Why Functions? requestResponse() fireAndForget() requestStream() uppercase
Confidential │ ©2019 VMware, Inc. 13 Serverless platforms Why Functions? AWS/Azure/Google uppercase
Confidential │ ©2019 VMware, Inc. 14 RabbitMQKafka Messaging Why Functions? uppercase
Confidential │ ©2019 VMware, Inc. 15 Why Functions? uppercase
Confidential │ ©2019 VMware, Inc. 16 <Demo>
Confidential │ ©2019 VMware, Inc. 17 ● 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!
Confidential │ ©2019 VMware, Inc. 18

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Functions: Implement Once, Execute Anywhere!

  • 1. Confidential │ ©2019 VMware, Inc. Spring Cloud Functions write once run anywhere! SpringOne 2020 Oleg Zhurakousky Spring Engineering
  • 2. Confidential │ ©2019 VMware, Inc. 2 ● Scope ● Deep(ish) dive into Spring Cloud Function ● Run anywhere part Spring Cloud Function - agenda
  • 3. Confidential │ ©2019 VMware, Inc. 3 java.util.function.Supplier<?> java.util.function.Function<?,?> java.util.function.Consumer<?> POJO function Spring Cloud Function - scope
  • 4. Confidential │ ©2019 VMware, Inc. 4 ● 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
  • 5. Confidential │ ©2019 VMware, Inc. 5 <Demo>
  • 6. Confidential │ ©2019 VMware, Inc. 6 Why Spring Cloud Function
  • 7. Confidential │ ©2019 VMware, Inc. 7
  • 8. Confidential │ ©2019 VMware, Inc. 8 FUNCTION Why Functions? uppercase
  • 9. Confidential │ ©2019 VMware, Inc. 9 FUNCTION Why Functions? uppercase
  • 10. Confidential │ ©2019 VMware, Inc. 10 HTTP Why Functions? post/get/... uppercase
  • 11. Confidential │ ©2019 VMware, Inc. 11 RSocket Why Functions? requestResponse() uppercase
  • 12. Confidential │ ©2019 VMware, Inc. 12 RSocket Why Functions? requestResponse() fireAndForget() requestStream() uppercase
  • 13. Confidential │ ©2019 VMware, Inc. 13 Serverless platforms Why Functions? AWS/Azure/Google uppercase
  • 14. Confidential │ ©2019 VMware, Inc. 14 RabbitMQKafka Messaging Why Functions? uppercase
  • 15. Confidential │ ©2019 VMware, Inc. 15 Why Functions? uppercase
  • 16. Confidential │ ©2019 VMware, Inc. 16 <Demo>
  • 17. Confidential │ ©2019 VMware, Inc. 17 ● 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!
  • 18. Confidential │ ©2019 VMware, Inc. 18