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SpringOne 2016 in a nutshell
- 1. SpringOne 2016 in a nutshell @JeroenResoort @jdriven_nl Tim te Beek
- 3. How is Las Vegas?
- 6. How is Las Vegas? It’s Hot! 35 degrees Celsius…
- 7. How is Las Vegas? It’s Hot! 35 degrees Celsius… at 05:00 in the morning…
- 8. How is Las Vegas? It’s Hot! 35 degrees Celsius… at 05:00 in the morning… 45 degrees Celsius during daytime!
- 10. ● 2000+ attendees ● 184 speakers ● Great speakers, great talks ● 9 parallel tracks ● Superb venue
- 11. Today A variety of subjects ● Spring Boot 1.4 ● Spring Framework 5.0 ● PCF Dev ● Microservices and DDD ● The talent pool ● Consumer driven contracts ● Spring cloud Sleuth and Zipkin
- 12. What’s new in Spring boot 1.4 Uses Spring Framework 4.3 Run Unit Tests with only a ‘slice’ of Spring easily ● @WebMvcTest, @DataJpaTest, @JsonTest ● Only setup controller for specific test ● Setup MockMvc automatically ● Less boilerplate code
- 13. What’s new in Spring boot 1.4 FailureAnalyzer ● Many common failures get easy to read failure messages ● You can write your own analyzers Spring REST Docs ● Combines hand-written documentation written with Asciidoctor and auto-generated snippets produced with Spring MVC Test ● Guarantees your documentation is in line with your API
- 14. What’s new in Spring boot 1.4 See keynote session by Stephane Nicoll and Josh Long https://www.youtube.com/watch?v=7U90Lfxatpk
- 15. Microservices and Domain Driven Design Microservices and DDD go hand in hand DDD Aggregates are a useful concept when designing microservices When communicating across contexts you use Events Forget about ACID and XA transactions Use event sourcing Check the talk by Chris Richardson when it comes online!
- 16. Spring Framework 5.0 Roadmap: ● 5.0 RC1: Dec 2016 ● 5.0 GA: Q1 2017 Upgrades: JDK8+, Servlets 3.1+, JMS 2.0+, JPA 2.1+, JUnit 5 JDK9 compatibility Startup performance Junit 5
- 17. Spring Framework 5.0 HTTP/2 Lambda-oriented HTTP routing and processing Reactive streams support Backpressure Use Spring Reactor or RxJava
- 18. Why reactive?
- 19. Why reactive?
- 22. More on Reactive Don’t miss the reactive workshop by Bas and Riccardo at JFall! "Making the paradigm-shift to Reactive Programming with Spring 5 Web Reactive"
- 23. Pivotal: “We Transform How The World Builds Software”
- 24. Keynote session: “Help Developers Do What They Love” by Onsi Fakhouri Summarises quite nicely the main subjects of the conference
- 25. How to transform your business into a software business? Organisation structure Cultural change Continuous delivery. Continuously experimenting and taking risk.
- 26. How to transform your business into a software business? ComCast has made this journey, they are now doing 4000 deployments a day
- 27. PCF Dev Run a cloud foundry locally from your laptop Easy to install: download file and execute Some additional steps required to run offline To update to a new version you will need to download and install again
- 30. Using 100% of the talent pool Don’t ignore women and people of other ethnicity A Tale of Two Ladies: On Generating Opportunity for Women in Tech - Cornelia Davis Inclusion through Lending Privilege - Anjuan Simmons
- 33. Using 100% of the talent pool Education Perception Unconscious bias
- 34. Consumer driven contracts Interesting way of defining contracts See http://martinfowler.com/articles/consumerDrivenContracts.html Consumer contracts express a subset of the system's business function capabilities in terms of the consumer's expectations of the provider contract.
- 36. Consumer driven contracts Interesting way of defining contracts See http://martinfowler.com/articles/consumerDrivenContracts.html Consumer contracts express a subset of the system's business function capabilities in terms of the consumer's expectations of the provider contract. Spring Cloud Contract helps you with that
- 37. Spring Cloud Contract See https://cloud.spring.io/spring-cloud-contract/ Spring Cloud Contract Verifier is a tool that enables Consumer Driven Contract (CDC) development of JVM-based applications. It is shipped with Contract Definition Language (DSL). Contract definitions are used to produce following resources: ● JSON stub definitions to be used by WireMock (HTTP Server Stub) when doing integration testing on the client code (client tests). Test code must still be written by hand, test data is produced by Spring Cloud Contract Verifier ● Acceptance tests (in JUnit or Spock) used to verify if server-side implementation of the API is compliant with the contract (server tests). Full test is generated by Spring Cloud Contract Verifier
- 38. Latency analysis and distributed tracing ● Service architecture isn’t simple anymore ○ Multiple servers, instances, possible paths ● Troubleshooting becomes murder-mystery ○ Is POST /things slow? ○ Where did this happen? ○ Which event was it? ○ Is it abnormal? ● Clues are scattered and hard to relate
- 39. Spring Cloud Sleuth - Span Span - individual operation, contains timestamped events and tags Unique, generated id
- 40. Spring Cloud Sleuth - Trace Trace - end-to-end latency graph, composed of spans Another unique, generated id
- 41. Spring Cloud Sleuth - Log correlation Logs get Mapped Diagnostic Context tags of span and trace IDs Correlate requests across services with Logstash / Kibana Send traces to Zipkin for latency visualization
- 42. Spring Cloud Sleuth - How to 1. Add `spring-cloud-starter-sleuth` to classpath 2. Check instrumentation a. Out of the box: HTTP, Messaging, Feign, Zuul, Hystrics, @Async, Runnable/Callable 3. Send to Zipkin with `spring-cloud-starter-sleuth-zipkin` a. HTTP to localhost:9411 by default 4. Tweak sampling percentage a. 10% by default
- 43. Visualize traces with Zipkin
- 44. Zipkin - How to Just a jar, available from GitHub Data stored in memory, cassandra, elasticsearch or mysql Available as-a-service in PCF
- 45. Sleuth / Zipkin summary ● Log correlation allows you to match logs for a given trace ● Distributed tracing allows you to quickly see latency issues in your system ● Zipkin is a great tool to visualize the latency graph and system dependencies ● Spring Cloud Sleuth integrates with Zipkin and grants you log correlation
- 46. What more? Spring cloud task and Spring cloud data flow (evolution of Spring Batch and Spring XD) Google and Microsoft promoting their cloud platforms as cloud foundry compatible
- 47. Watch list Youtube channel from Pivotal contains keynotes sessions and some other talks: https://www.youtube.com/watch?v=xdw_9dADM-4&list=PLAdzTan_eSPQ1fuLSBhyB4eEZF7JQM0Mx Recommended talks: ● Simplifying the Future - Adrian Cockcroft - https://www.youtube.com/watch?v=DGK6jjamzfY ● A Tale of Two Ladies: On Generating Opportunity for Women in Tech - Cornelia Davis - https://www.youtube.com/watch?v=2lFv3qknbqQ ● Cloud Native Java - Josh Long - https://www.youtube.com/watch?v=5q8B6lYhFvE ● Developing microservices with aggregates - Chris Richardson ● Consumer Driven Contracts and your microservice architecture - Marcin Grzejszczak ● From Imperative To Reactive Web Apps - Rossen Stoyanchev ● A lot more... (hope they come online soon!)
- 48. “Open source is a positive-sum game” Sam Ramji, CEO at Cloud Foundry
- 49. SpringOne 2016 in a nutshell @JeroenResoort @jdriven_nl Tim te Beek