Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
SlideShare a Scribd company logo

JavaOne 2016 - Reactive Microservices with Java and Java EE

•
•
Rodrigo Cândido da Silva
Rodrigo Cândido da Silva

Reactive services were defined by the Reactive Manifesto. They are built to be more flexible, loosely-coupled and scalable and also they are qualified based on the four principles: responsive, resilient, elastic and message driven. Java and the Java EE platform offers a pretty good structure and libraries to implement reactive services and transform it in a microservices architecture designed.

1 of 27
Download to read offline
Reactive Microservices with Java and Java EE Rodrigo Cândido da Silva @rcandidosilva Israel Boza Rodriguez @IsraKaos
Agenda • Monolithic vs. Microservices • Reactive Manifesto • Resilience • Message-driven • Demo • Q&A
Monolithic vs. Microservices
Microservices • Small components • Isolated deployment • Independent technology • Separate infrastructure "Small independent component with well- defined boundaries that’s doing one thing, but doing it well"
Reactive Manifesto
Resilient • How to support it on microservices? • Central point of configuration • Service registry and discovery • Routing features • Load balancing • Failover • Monitoring
Spring BootSpring Cloud Spring Cloud + Netflix OSS
Spring Cloud + Netflix OSS “Nice match to build resilient microservices with Java" Configuration Management Spring Cloud Config + Bus Service Registration and Discovery Netflix Eureka Load Balacing Netflix Ribbon Circuit Breaker Netflix Hystrix + Turbine Proxy Server Netflix Zuul Autenthication Spring Cloud Security
Spring Cloud Config
Netflix Eureka
Netflix Ribbon
Netflix Hystrix • Circuit Breaker Pattern
Hystrix Dashboard
Netflix Zuul
Spring Cloud Security Discovery Client Relying Party Resource Server Get an access token & an ID Token (JWT) Use an access token Authorization Server Iden.ty Provider or IDP or OpenID Provider or OP Authorization Endpoint Token Endpoint Important Stuff Userinfo Endpoint Registration Endpoint JWKS Endpoint JWKS Endpoint Validate (JWT) ID Token /.well-known /webfinger /openid-configura.on Check Session IFrame End Session Endpoint
Message-Driven • How to support it on microservices? • Asynchronous communication • Non blocking I/O • Distributed • Consistency • Event sourcing • CQRS
Reactive Programming • Asynchronous communication and data streams • reactive-streams.org
Reactive Alternatives at Java EE JMS EJB 3 Message-Driven Beans Asynchronous Session Beans CDI Events Observers Servlet Asynchronous NIO JAX-RS Async on Server Async on Client WebSocket Async Remote Endpoints Concurrency Utilities
Project Reactor • Library for building non-blocking apps • Interacts with Java 8 functional API • Offers two reactive composable API • Flux[N] and Mono[0|1] • Supports scalable in-memory routing with Bus extensions • Ported to support microservices
REST Endpoint @RestController public class UserRestController { private static final List<User> users = new ArrayList<>(); static { users.add(new User(1, "Rodrigo", "C", "da Silva")); users.add(new User(2, "Israel", "B", "Rodriguez")); users.add(new User(3, "Bruno", "", "Souza")); users.add(new User(4, "Edson", "", "Yanaga")); } @RequestMapping(method = RequestMethod.GET, value = "/users") public List<User> getUsers() { return users; } @RequestMapping(method = RequestMethod.GET, value = "/user/{id}") public User getUser(@PathVariable("id") Integer id) { return users.stream().filter(g -> g.getId() == id) .collect(Collectors.toList()).get(0); } }
REST Proxy @Component public class UserServiceProxy { @Autowired UserService service; @HystrixCommand(fallbackMethod = "defaultUsersObservable") public Observable<List<User>> getUsersObservable() { return new ObservableResult<List<User>>() { @Override public List<User> invoke() { return service.getUsers(); } }; } public Observable<User> defaultUsersObservable() { return null; } } @FeignClient("USER-SERVICE") public interface UserService { @RequestMapping(value = "/users", method = RequestMethod.GET) List<User> getUsers(); @RequestMapping(value = "/user/{id}", method = RequestMethod.GET) User getUser(@PathVariable("id") Integer id); }
REST Async Client @RestController public class APIController { @Autowired GroupServiceProxy groupService; @Autowired UserServiceProxy userService; @RequestMapping(method = RequestMethod.GET, value = "/userGroups") public UserGroup getUserGroups() { Observable<List<Group>> groups = groupService.getGroupsObservable(); Observable<List<User>> users = userService.getUsersObservable(); Observable<UserGroup> userGroupObservable = Observable.zip(groups, users, (g, u) -> new UserGroup(u, g)); return userGroupObservable.toList().toBlocking().single().get(0); } }
Demo • Reactive Microservices • https://github.com/rcandidosilva/reactive-microservices
Other Alternatives
Q&A ?
References • http://projects.spring.io/spring-boot/ • http://projects.spring.io/spring-cloud/ • https://netflix.github.io/ • http://www.reactive-streams.org/ • http://www.reactivemanifesto.org/ • https://github.com/reactivemanifesto/website-manifesto/tree/master/public/pdf • https://projectreactor.io/ • http://reactivex.io/ • http://www.kennybastani.com/2016/04/event-sourcing-microservices-spring- cloud.html
Thank you! Obrigado!

More Related Content

JavaOne 2016 - Reactive Microservices with Java and Java EE

  • 1. Reactive Microservices with Java and Java EE Rodrigo Cândido da Silva @rcandidosilva Israel Boza Rodriguez @IsraKaos
  • 2. Agenda • Monolithic vs. Microservices • Reactive Manifesto • Resilience • Message-driven • Demo • Q&A
  • 4. Microservices • Small components • Isolated deployment • Independent technology • Separate infrastructure "Small independent component with well- defined boundaries that’s doing one thing, but doing it well"
  • 6. Resilient • How to support it on microservices? • Central point of configuration • Service registry and discovery • Routing features • Load balancing • Failover • Monitoring
  • 7. Spring BootSpring Cloud Spring Cloud + Netflix OSS
  • 8. Spring Cloud + Netflix OSS “Nice match to build resilient microservices with Java" Configuration Management Spring Cloud Config + Bus Service Registration and Discovery Netflix Eureka Load Balacing Netflix Ribbon Circuit Breaker Netflix Hystrix + Turbine Proxy Server Netflix Zuul Autenthication Spring Cloud Security
  • 12. Netflix Hystrix • Circuit Breaker Pattern
  • 15. Spring Cloud Security Discovery Client Relying Party Resource Server Get an access token & an ID Token (JWT) Use an access token Authorization Server Iden.ty Provider or IDP or OpenID Provider or OP Authorization Endpoint Token Endpoint Important Stuff Userinfo Endpoint Registration Endpoint JWKS Endpoint JWKS Endpoint Validate (JWT) ID Token /.well-known /webfinger /openid-configura.on Check Session IFrame End Session Endpoint
  • 16. Message-Driven • How to support it on microservices? • Asynchronous communication • Non blocking I/O • Distributed • Consistency • Event sourcing • CQRS
  • 17. Reactive Programming • Asynchronous communication and data streams • reactive-streams.org
  • 18. Reactive Alternatives at Java EE JMS EJB 3 Message-Driven Beans Asynchronous Session Beans CDI Events Observers Servlet Asynchronous NIO JAX-RS Async on Server Async on Client WebSocket Async Remote Endpoints Concurrency Utilities
  • 19. Project Reactor • Library for building non-blocking apps • Interacts with Java 8 functional API • Offers two reactive composable API • Flux[N] and Mono[0|1] • Supports scalable in-memory routing with Bus extensions • Ported to support microservices
  • 20. REST Endpoint @RestController public class UserRestController { private static final List<User> users = new ArrayList<>(); static { users.add(new User(1, "Rodrigo", "C", "da Silva")); users.add(new User(2, "Israel", "B", "Rodriguez")); users.add(new User(3, "Bruno", "", "Souza")); users.add(new User(4, "Edson", "", "Yanaga")); } @RequestMapping(method = RequestMethod.GET, value = "/users") public List<User> getUsers() { return users; } @RequestMapping(method = RequestMethod.GET, value = "/user/{id}") public User getUser(@PathVariable("id") Integer id) { return users.stream().filter(g -> g.getId() == id) .collect(Collectors.toList()).get(0); } }
  • 21. REST Proxy @Component public class UserServiceProxy { @Autowired UserService service; @HystrixCommand(fallbackMethod = "defaultUsersObservable") public Observable<List<User>> getUsersObservable() { return new ObservableResult<List<User>>() { @Override public List<User> invoke() { return service.getUsers(); } }; } public Observable<User> defaultUsersObservable() { return null; } } @FeignClient("USER-SERVICE") public interface UserService { @RequestMapping(value = "/users", method = RequestMethod.GET) List<User> getUsers(); @RequestMapping(value = "/user/{id}", method = RequestMethod.GET) User getUser(@PathVariable("id") Integer id); }
  • 22. REST Async Client @RestController public class APIController { @Autowired GroupServiceProxy groupService; @Autowired UserServiceProxy userService; @RequestMapping(method = RequestMethod.GET, value = "/userGroups") public UserGroup getUserGroups() { Observable<List<Group>> groups = groupService.getGroupsObservable(); Observable<List<User>> users = userService.getUsersObservable(); Observable<UserGroup> userGroupObservable = Observable.zip(groups, users, (g, u) -> new UserGroup(u, g)); return userGroupObservable.toList().toBlocking().single().get(0); } }
  • 23. Demo • Reactive Microservices • https://github.com/rcandidosilva/reactive-microservices
  • 25. Q&A ?
  • 26. References • http://projects.spring.io/spring-boot/ • http://projects.spring.io/spring-cloud/ • https://netflix.github.io/ • http://www.reactive-streams.org/ • http://www.reactivemanifesto.org/ • https://github.com/reactivemanifesto/website-manifesto/tree/master/public/pdf • https://projectreactor.io/ • http://reactivex.io/ • http://www.kennybastani.com/2016/04/event-sourcing-microservices-spring- cloud.html