Are you ready for going serverless? Spring Cloud is! With the help of a brand new Spring Cloud Function project you can write code once and reuse it as a web-endpoint, a stream handler, or simply as a serverless function deployed in cloud. In this talk, Orkhan Gasimov speaks about the features of Spring Cloud Function and explains how it helps to get more productive. This presentation was held by Orkhan Gasimov (Digital Transformation Architect, Consultant, GlobalLogic) at GlobalLogic Kyiv Java Career Day on August 11, 2018. Learn more: https://www.globallogic.com/ua/events/globallogic-kyiv-java-career-day

1. 1
Cloud Native Serverless Java

2. 22
Speaker
Orkhan Gasimov
Digital Transformation Architect @ GlobalLogic
• 15 years of software engineering;
• training & mentorship;
• author of trainings about:
• Microservices;
• Spring Cloud;
• Akka;
2

3. 3
Agenda
1. Concepts
2. Architecture
3. Features
4. Examples

4. 4
Evolution
Distributed Application Design

5. 5
5
Enterprise
Evolution

6. 6
6
Enterprise
App Server
Evolution

7. 7
7
Enterprise
App Server
Module
Module
Module
Module
Evolution

8. 8
8
Enterprise
Evolution
App Server 1
Module
Module
Module
Module
App Server N
Module
Module
Module
Module

9. 9
9
Enterprise
Evolution
App Server 1
Module
Module
Module
Module
App Server N
Module
Module
Module
Module
Admin Server
Deployment & Configuration

10. 10
10
Enterprise
Evolution
Module
Module
Module
Module
Module
Module
Module
Module
Admin Server
Deployment & Configuration

11. 11
11
Enterprise
Evolution
App
App
App
App
App
App
App
App
Admin Server
Deployment & Configuration

12. 12
12
Enterprise
Evolution
App
App
App
App
App
App
App
App
Discovery & Configuration
Microservices

13. 13
13
Enterprise
Evolution
App
App
App
App
App
App
App
App
App
App
App App
App
App
App
App
App
App
App
App
Discovery & Configuration
Microservices

14. 14
14
Enterprise
Evolution
App
App
App
App
App
App
App
App
App
App
App App
App
App
App
App
App
App
App
App
Server
Microservices
Discovery & Configuration

15. 15
15
Enterprise
Evolution
App
App
App
App
App
App
App
App
App
App
App App
App
App
App
App
App
App
App
App
Server
Modules
Microservices
Discovery & Configuration

16. 16
16
Enterprise
Evolution
App
App
App
App
App
App
App
App
App
App
App App
App
App
App
App
App
App
App
App
Server
Modules
Fn
Microservices
Discovery & Configuration

17. 17
17
Enterprise
Evolution
App
App
App
App
App
App
App
App
App
App
App App
App
App
App
App
App
App
App
App
Server
Modules
Fn ?
Microservices
Discovery & Configuration

18. 18
18
Enterprise
Evolution
App
App
App
App
App
App
App
App
App
App
App App
App
App
App
App
App
App
App
App
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Microservices
Discovery & Configuration

19. 19
19
Enterprise
Evolution
App
App
App
App
App
App
App
App
App
App
App App
App
App
App
App
App
App
App
App
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Server
Modules
Fn ?
Microservices
Discovery & Configuration

20. 20
20
Enterprise
Evolution
App
App
App
App
App
App
App
App
Microservices
Discovery & Configuration

21. 21
21
Enterprise
Evolution
Microservices
Discovery & Configuration
App App App App
App App App App

22. 22
22
Enterprise
Evolution
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Microservices Functions
Discovery & Configuration

23. 23
23
Enterprise
Evolution
Distributed Functions
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Microservices Functions
Discovery & Configuration

24. 24
24
Enterprise
Evolution
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Microservices Functions
HTTP
Distributed Functions
Discovery & Configuration

25. 25
25
Enterprise
Evolution
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Microservices Functions
MQHTTP
Distributed Functions
Discovery & Configuration

26. 26
26
Enterprise
Evolution
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Spring
Microservices Functions
MQHTTP
Distributed Functions
Discovery & Configuration

27. 27
27
Enterprise
Evolution
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Discovery & Configuration
MQHTTP
Cloud Spring
Microservices Functions
Distributed Functions

28. 28
Spring Cloud Function
Serverless & X-Platform

29. 29
Components
Service Service Service

30. 30
Components
Service Service Service
Repository Repository RepositoryRepository

31. 31
Components
Controller
Service
Controller
Service Service
Repository Repository RepositoryRepository

32. 32
Components
Controller
Service
Controller
Service Service
Repository Repository RepositoryRepository
DTO DTO
Entity Entity Entity Entity

33. 33
Components
Controller
Service
Controller
Service Service
Repository Repository RepositoryRepository
DTO DTO
Entity Entity Entity Entity

34. 34
Components
Service
Function
Function
Function
Function

35. 35
Functions
Spring Cloud Function

36. 36
Functions
Function

37. 37
Functions
Supplier Function

38. 38
Functions
Supplier ConsumerFunction

39. 39
Beans
Functions as Beans

40. 40
Declare function as beans
@SpringBootApplication
public class TestApp {
@Bean
public Function<Flux<String>, Flux<String>> upperCase() {
return flux -> flux.map(String::toUpperCase);
}
@Bean
public Supplier<String> helloWorld() {
return () -> "Hello World";
}
public static void main(String[] args) {
SpringApplication.run(TestApp.class, args);
}
}

41. 41
@SpringBootApplication
public class TestApp {
public static void main(String[] args) {
SpringApplication.run(TestApp.class, args);
}
}
@Component
public class HelloWorld implements Supplier<String> {
@Override
public String get() {
return "Hello World";
}
}
@Component
public class UpperCase implements Function<Flux<String>, Flux<String>> {
@Override
public Flux<String> apply(Flux<String> flux) {
return flux.map(String::toUpperCase);
}
}

42. 42
Web
Functions as Endpoints

43. 43
Endpoints
Supplier ConsumerFunction

44. 44
Endpoints
Supplier ConsumerFunction

45. 45
Endpoints
Supplier ConsumerFunction

46. 46
Endpoints
Supplier ConsumerFunction

47. 47
Web
Deploy functions as HTTP Endpoints
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-function-web</artifactId>
</dependency>

48. 48
Stream
Functions as Stream handlers

49. 49
Handlers
Supplier ConsumerFunction

50. 50
Handlers
Supplier ConsumerFunction
Source SinkProcessor

51. 51
Stream
Deploy functions as Stream handlers
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-function-stream</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-stream-binder-{rabbit/kafka/...}</artifactId>
</dependency>

52. 52
Stream
spring:
profiles: upper
cloud:
stream:
bindings:
input:
destination: hello
output:
destination: upper
function:
stream:
sink:
name: upperCase
source:
name: upperCase

53. 53
Stream
spring:
profiles: hello
cloud:
stream:
bindings:
output:
destination: hello
function:
stream:
sink:
enabled: false
source:
name: helloWorld

54. 54
Deployment
Functions anywhere

55. 55
Deployment
1. Cloud
• Amazon AWS
• Microsoft Azure
• Apache OpenWhisk

56. 56
Deployment
1. Cloud
• Amazon AWS
• Microsoft Azure
• Apache OpenWhisk
2. Spring Cloud Data Flow
• Kubernetes
• Cloud Foundry
• Mesos
• Spark

57. 57
Summary
Distributed Functions

58. 58
Summary
Enterprise
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Discovery & Configuration
MQHTTP
Cloud Spring
Distributed Functions
Microservices Functions

59. 59
Summary
1. Functions as Beans
2. Serverless & X-Platform
• Web
• Streaming
• Cloud
• Data Flow Fn
Fn
Fn
Fn
Fn
Fn
Fn
Fn
Discovery & Configuration
MQHTTP
Cloud Spring
Distributed Functions

60. 60
Thank you
http://orkhan.io
http://fb.com/groups/reactive.distributed