Resilient and Adaptable Systems with Cloud Native APIs
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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.
![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)
Resilient and Adaptable Systems with Cloud Native APIs
- 1. Spencer Gibb @spencerbgibb Olga Maciaszek-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 a Cloud-Native API? 3
- 4. The API is the 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: The API is the product 6
- 7. API First: The API is the product Streaming Shopping Shipping 7
- 8. Systems Driven by the API 8
- 9. Systems Driven by the API Apps Instances & Networks Load Balancer 9
- 10. Systems Driven by the API Resilience Fault Tolerance Rate Limiting 10
- 11. The API is greater than the sum of its parts 11
- 12. Serverless 12
- 13. Server-side architecture run in stateless, event-triggered, ephemeral compute containers.* * https://martinfowler.com/articles/serverless.html 13
- 14. Backend as a Service 14
- 15. Function as a Service 15
- 16. Event-Driven 16
- 17. Infrastructure management handled by cloud providers 17
- 18. Automatic scaling Built-in high availability Pay-for-use billing model 18
- 19. Emphasis on short startup and low memory footprint 19
- 20. Higher system complexity Complex monitoring and tracing Risk of vendor locks Last 10% trap 20
- 21. Spring Cloud Function @SpringBootApplication public class Application { [...] @Bean public Function<String, String> uppercase() { return value -> value.toUpperCase(); }} 21
- 24. Responsiveness is important Optimize for availability and speed 24
- 25. Protocols 25
- 26. Infrastructure is Important. Scaling and Resiliency 26
- 27. Spring Ecosystem allows focus on core business. Speed to market matters. 27
- 28. Evolving 28
- 29. Intra-service communication as part of functionalities’ implementation 29
- 31. Backward compatibility Addition only Tolerant consumers Deferred updates 31
- 32. Consumer-Driven Contracts Collaborative Scenario-based Integration testing Backwards compatibility 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. Protocols 34
- 35. HTTP 35
- 39. Text-based The internet is running in debug mode* * http://java-is-the-new-c.blogspot.com/2014/10/why-protocols-are-messy-concept.html 39
- 42. Messaging 42
- 43. Rabbitmq & Kafka offer distributed message brokers and streaming semantics 43
- 46. Messaging allows separation of concerns at the API level 46
- 47. Event Sourcing Command Query Responsibility Segregation (CQRS) https://martinfowler.com/eaaDev/EventSourcing.html https://martinfowler.com/bliki/CQRS.html 47
- 48. RSocket 48
- 49. Reactive Streams semantics on protocol level 49
- 53. Binary 53
- 55. Gateways 55
- 58. Service Registration and Discovery Service A Service Registry Service A Service A 1. Register Service B 2. Query for service A instances 3. Connect 58
- 60. Spring Cloud Gateway Spring Cloud Gateway Service 1 Service 2 Service 3 Service 4 Mobile App Web App 60
- 61. Spring Cloud Gateway Load Balancing Fault Tolerance Rate Limiting Security 61
- 63. RSocket Broker Load Balancing Fault Tolerance Security Service Discovery 63
- 64. RSocket Broker RSocket Broker Service 1 Service 3 Service 2 Service 3 RSocket Broker RSocket Broker Service 1 Service 2 64
- 68. POST Service ID and RSocket endpoint from URI byte[] Tags passed as headers Interaction mode from URI or default WellKnownKey 68
- 69. Architecture 69
- 70. Greenfield 70
- 71. Allows builders to choose the right tool for the job 71
- 72. Constraints are: budget, personnel, time to market, functional requirements. 72
- 75. Modernising architecture by areas/ 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. Demo 78
- 79. Demo Flow HTTP Loan Service 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 © 2020 Spring. A VMware-backed project. 81