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![Spring Cloud Function
@SpringBootApplication
public class Application {
[...]
@Bean
public Function<String, String> uppercase() {
return value -> value.toUpperCase();
}}
21](https://image.slidesharecdn.com/resilientandadaptablesystemswithcloudnativeapis-1-210901223945/85/Resilient-and-Adaptable-Systems-with-Cloud-Native-APIs-21-320.jpg)
!['Spring Cloud Contract
request {
method 'PUT'
url '/fraudcheck'
body([
"client.id": $(regex('[0-9]{10}')),
loanAmount : 99999
])
headers {
contentType('application/json')
}
}
response {
status OK()
body([
fraudCheckStatus : "FRAUD",
"rejection.reason": "Amount too high"
])
headers {
contentType('application/json')
}
}
33](https://image.slidesharecdn.com/resilientandadaptablesystemswithcloudnativeapis-1-210901223945/85/Resilient-and-Adaptable-Systems-with-Cloud-Native-APIs-33-320.jpg)
![POST
Service ID and RSocket endpoint from URI
byte[]
Tags passed as headers
Interaction mode from URI or default
WellKnownKey
68](https://image.slidesharecdn.com/resilientandadaptablesystemswithcloudnativeapis-1-210901223945/85/Resilient-and-Adaptable-Systems-with-Cloud-Native-APIs-68-320.jpg)
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Resilient and Adaptable Systems with Cloud Native APIs
The document discusses cloud-native APIs, highlighting their importance in modern applications, with a focus on architecture, protocols, and the role of APIs in facilitating system resilience and adaptability. It covers various components such as backend services, load balancing, and messaging protocols, emphasizing the need for efficient intra-service communication and backward compatibility. Additionally, it includes references to frameworks and tools like Spring Cloud and RSocket that enhance cloud-native development.
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Resilient and Adaptable Systems with Cloud Native APIs
- 1. Spencer Gibb @spencerbgibb OlgaMaciaszek-Sharma @olga_maciaszek Resilient and Adaptable Systems with Cloud Native APIs Copyright © 2020 VMware, Inc. or its affiliates. 1
- 2. Cover w/ Image Agenda ●What is a Cloud-Native API? ● Protocols ● Gateways ● Architecture ● Demo ● Q+A 2
- 3. What is aCloud-Native API? 3
- 4. The API isthe product https://techcrunch.com/2019/09/06/apis-are-the-next-big-saas-wave/ API First 4
- 5. IoT devices API First:The API is the product WWW Mobile Apps Web apps 5
- 6. API First: TheAPI is the product 6
- 7. API First: TheAPI is the product Streaming Shopping Shipping 7
- 8. Systems Driven bythe API 8
- 9. Systems Driven bythe API Apps Instances & Networks Load Balancer 9
- 10. Systems Driven bythe API Resilience Fault Tolerance Rate Limiting 10
- 11. The API isgreater than the sum of its parts 11
- 12.
- 13. Server-side architecture runin stateless, event-triggered, ephemeral compute containers.* * https://martinfowler.com/articles/serverless.html 13
- 14. Backend as aService 14
- 15. Function as aService 15
- 16.
- 17. Infrastructure management handledby cloud providers 17
- 18. Automatic scaling Built-in highavailability Pay-for-use billing model 18
- 19. Emphasis on shortstartup and low memory footprint 19
- 20. Higher system complexity Complexmonitoring and tracing Risk of vendor locks Last 10% trap 20
- 21. Spring Cloud Function @SpringBootApplication publicclass Application { [...] @Bean public Function<String, String> uppercase() { return value -> value.toUpperCase(); }} 21
- 22.
- 23.
- 24. Responsiveness is important Optimizefor availability and speed 24
- 25.
- 26. Infrastructure is Important. Scalingand Resiliency 26
- 27. Spring Ecosystem allows focuson core business. Speed to market matters. 27
- 28.
- 29. Intra-service communication aspart of functionalities’ implementation 29
- 30.
- 31. Backward compatibility Addition only Tolerantconsumers Deferred updates 31
- 32. Consumer-Driven Contracts Collaborative Scenario-based Integration testing Backwardscompatibility testing 32
- 33. 'Spring Cloud Contract request{ method 'PUT' url '/fraudcheck' body([ "client.id": $(regex('[0-9]{10}')), loanAmount : 99999 ]) headers { contentType('application/json') } } response { status OK() body([ fraudCheckStatus : "FRAUD", "rejection.reason": "Amount too high" ]) headers { contentType('application/json') } } 33
- 34.
- 35.
- 36.
- 37.
- 38.
- 39. Text-based The internet isrunning in debug mode* * http://java-is-the-new-c.blogspot.com/2014/10/why-protocols-are-messy-concept.html 39
- 40.
- 41.
- 42.
- 43. Rabbitmq & Kafka offerdistributed message brokers and streaming semantics 43
- 44.
- 45.
- 46. Messaging allows separationof concerns at the API level 46
- 47. Event Sourcing Command QueryResponsibility Segregation (CQRS) https://martinfowler.com/eaaDev/EventSourcing.html https://martinfowler.com/bliki/CQRS.html 47
- 48.
- 49. Reactive Streams semanticson protocol level 49
- 50.
- 51.
- 52.
- 53.
- 54.
- 55.
- 56.
- 57.
- 58. Service Registration andDiscovery Service A Service Registry Service A Service A 1. Register Service B 2. Query for service A instances 3. Connect 58
- 59.
- 60. Spring Cloud Gateway SpringCloud Gateway Service 1 Service 2 Service 3 Service 4 Mobile App Web App 60
- 61. Spring Cloud Gateway LoadBalancing Fault Tolerance Rate Limiting Security 61
- 62.
- 63. RSocket Broker Load Balancing FaultTolerance Security Service Discovery 63
- 64. RSocket Broker RSocket Broker Service 1 Service3 Service 2 Service 3 RSocket Broker RSocket Broker Service 1 Service 2 64
- 65.
- 66.
- 67.
- 68. POST Service ID andRSocket endpoint from URI byte[] Tags passed as headers Interaction mode from URI or default WellKnownKey 68
- 69.
- 70.
- 71. Allows builders tochoose the right tool for the job 71
- 72. Constraints are: budget, personnel,time to market, functional requirements. 72
- 73.
- 74.
- 75. Modernising architecture byareas/ components 75
- 76. Legacy Service +RSocket ecosystem Legacy HTTP Service RSocket Broker RSocket Service RSocket Service RSocket Service RSocket Service 76
- 77. Legacy Service +RSocket ecosystem Legacy HTTP Service RSocket Broker RSocket Service RSocket Service RSocket Service RSocket Service HTTP RSocket Bridge 77
- 78.
- 79. Demo Flow HTTP LoanService RSocket Broker RSocket Verification Service Gateway HTTP RSocket Bridge Verification Request Verification Response 79
- 80. Resources ● https://github.com/OlgaMaciaszek/spring-one-2021-rsocket-http-sample ● https://github.com/rsocket-routing/rsocket-routing-broker ●https://github.com/spring-projects-experimental/spring-native ● https://spring.io/projects/spring-cloud-function ● https://spring.io/projects/spring-cloud-contract ● https://spring.io/projects/spring-cloud-gateway ● https://rsocket.io/ 80
- 81. Thank you @olga_maciaszek @spencerbgibb © 2020Spring. A VMware-backed project. 81