If you missed the SpringOne Conference this year, don't fret! In this session you'll get the opportunity to get the highlights of the trip Jeroen and Tim made to Las Vegas and they'll show you the coolest stuff from Spring and CloudFoundry!
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!
9.
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!
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"
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
31.
32.
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.
35.
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
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
