From the AJUG meeting: http://www.meetup.com/atlantajug/events/222312943/ Oc 20, 2015 In this fully-loaded session we will give you an update on all things Spring. We will talk about the latest features in Spring Framework 4.2 which was released this summer, and also provide an outlook to what is coming with Spring 5 in 2016. Next, Spring Boot 1.3 is on the horizon and adds many new features. We will go over those and explain how Spring Boot helps you build production-ready Spring applications. And then we add Spring Cloud to the mix and explain the various modules

1. The Spring Update
Roy Clarkson | Glenn Renfro | Gunnar Hillert

2. Spring
2

3. Spring Data
3
Core Jpa Gemfire REST
KeyValue MongoDB Redis
Solr
Foundational Store Modules Web Apis
Core
Modules
Community
Modules
ElasticSearch Cassandra
Couchbase Neo4j

4. Spring Social
4

5. Spring 4.2
• @AliasFor
• Hibernate5 Support
• JMS Improvements
• Support for Money, Currency and TimeZone
(Formatter / ConversionService)
5

6. • Used to declare aliases between attributes
within an annotation
• e.g., locations and value in
@ContextConfiguration, or path and value in
@RequestMapping
• Used in composed annotations
@AliasFor
6
https://github.com/sbrannen/spring-composed

7. Spring 4.2 Testing
• Support for HtmlUnit incl. Selenium Webdriver
integration
• @Commit instead @Rollback(false)
• ContextCache is public Api
• @Sql
7
@Test
@Sql(statements = "DROP TABLE user IF EXISTS")
@Sql(scripts = “/test-schema.sql", statements =
"INSERT INTO user VALUES ('Dilbert')")

8. JUnit Rules
• SpringClassRule & SpringMethodRule
• Can be used with any JUnit runner
8
@RunWith(Parameterized.class)
@ContextConfiguration
public class ParameterizedSpringRuleTests {
@ClassRule
public static final SpringClassRule SPRING_CLASS_RULE
= new SpringClassRule();
@Rule
public final SpringMethodRule springMethodRule
= new SpringMethodRule();

9. Embedded DBs
• Unique Names for Embedded Databases
• Why? Recreating an embedded database within the
same JVM doesn’t actually create anything: a second
attempt simply connects to the existing one.
9
@Bean
public DataSource dataSource() {
return new EmbeddedDatabaseBuilder()
.generateUniqueName(true)
.addScript("schema.sql")
.addScript("user_data.sql")
.build();
}

10. Spring Web
• SimpUserRegistry
• CompletableFuture (Java 8)
• OkHTTP Integration with RestTemplate
• ScriptTemplateView
• JavaScript view templating, Nashorn (JDK 8)
10

11. HTTP Caching
• CacheControl builder
• A builder for creating "Cache-Control" HTTP
response headers.
11
@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**")
.addResourceLocations("/public-resources/")
.setCacheControl(CacheControl.maxAge(1,TimeUnit.HOURS)
.cachePublic());
}
}

12. HTTP Caching
12
@RequestMapping("/book/{id}")
public ResponseEntity<Book> showBook(@PathVariable Long id) {
Book book = findBook(id);
String version = book.getVersion();
return ResponseEntity
.ok()
.cacheControl(CacheControl.maxAge(30, TimeUnit.DAYS))
.eTag(version) // lastModified is also available
.body(book);
}
• Usage in Controllers

13. Spring Web
• Cross-origin resource sharing (CORS)
13
@CrossOrigin(maxAge = 3600)
@RestController
@RequestMapping("/account")
public class AccountController {
@CrossOrigin(origins = "http://domain2.com")
@RequestMapping("/{id}")
public Account retrieve(@PathVariable Long id) { … }
@RequestMapping(method = RequestMethod.DELETE, value = "/{id}")
public void remove(@PathVariable Long id) { … }
}

14. Async
• Spring 3.2 Async Request Handling
• Spring 4.0 WebSocket Messaging (SockJS +
Stomp)
• Spring 4.2 HttpStreaming
• Spring 4.2 Server-Sent Events (SSE)
• Spring 4.2 Direct Streaming
14

15. Server-Sent Events
15
@RequestMapping("/metrics")
public SseEmitter subscribeMetrics() {
SseEmitter emitter = new SseEmitter();
// Save emitter for further usage
return emitter;
}

16. Spring 4.3
• Refinements
• A richer set of convenience annotations (pre-
composed)
16

17. Spring 5
• Q4 2016
• Comprehensive JDK 9 support
• Java 8 baseline
• Servlet 3.0+
• HTTP/2
• Reactive support
17
https://github.com/spring-
projects/spring-reactive

18. Spring Boot 1.3
18
Pathway to #NoXML

19. 0
450000
900000
1350000
1800000
July 14 Sep 14 Nov 14 Jan 15 Mar 15 May 15 Jul 15
Spring Boot Adoption
19

20. • https://spring.io/blog/2013/03/04/spring-at-china-scale-alibaba-
group-alipay-taobao-and-tmall/
20
“AliExpress is the beginning of a new effort to re-
architect Taobao.com and Alipay.com for
microservices and cloud native, built on Spring Boot
and Spring Cloud.”
- Leijuan, Principal Engineer, AliExpress

21. 21

22. Boot 1.3
• Spring 4.2 and Spring Security 4.0
• OAuth2 Support
• Colorful Ascii Art Banners
22

23. Boot 1.3
• Fully executable JARs and service support
• Start as Unix/Linux services
• init.d
• systemd
23
$ ./myapp.jar

24. Boot 1.3
• Additional Health Indicators
• Actuator Metrics (Java 8)
• New actuator endpoints - e.g. /logfile
• Hypermedia for MVC actuator endpoints
• Actuator docs endpoint
24

25. Boot 1.3
• Spring Session Autoconfiguration
• Persistent sessions (Opt-in)
• Ant Support
• Support for @WebServlet, @WebFilter, and @WebListener
• When using an embedded servlet container, automatic
registration of @WebServlet, @WebFilter, and
@WebListener annotated classes can now be enabled
using @ServletComponentScan.
25

26. Logging
• Logback
• Spring Profile specific Configuration
• Use Environment Properties in Logback’
• logback-spring.xml
• Log4J 1.x deprecated
26
https://blogs.apache.org/foundation/entry/
apache_logging_services_project_announces

27. Boot Developer Tools
• Property Defaults
• Automatic application restarts
• Remote development support
27
http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/
reference/htmlsingle/#using-boot-devtools

28. Boot Developer Tools
• LiveReload support
• Install LiveReload browser plugin
• Bowser Refresh Button
28
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>

29. Caching
• @EnableCaching
• Auto-configuration now for:
29
JSR 107Guava

30. Boot and SPAs
• Web jars - /webjars/**
• /static, /public, /resources, /META-INF/resources
• Creating modular jars
30

31. Demo
31
https://github.com/ghillert/botanic-ng

32. Migrating to 1.3
• https://github.com/spring-projects/spring-boot/
wiki/Spring-Boot-1.3-Release-Notes
• Several properties changed
• Dependency updates
32

33. JSPs and Web.xml
• JSP limitations for über-Jars
• Servlet 3.0 to the rescue
• /META-INF/resources/WEB-INF/jsp
• Possible to Eliminate Web.xml
• TomcatEmbeddedServletContainerFactory
33

34. 34

35. Demo
35
https://github.com/devnexus/devnexus-site
JSPs with

36. Spring Initializr
• http://start.spring.io
36

37. Tooling - STS
• Spring Boot YML properties editor
• with code completion
• Improved support for Cloud Foundry
• Support for Spring Boot DevTools
• Attach Java debugger to CF deployed apps
• Spring Boot Dashboard
37

38. • Service Discovery
• Circuit Breaker
• Client Side Load Balancer
• Router and Filter
• Spring Cloud Stream + Data Flow
• Distributed tracing
38
Spring Cloud

39. 39
Eureka
Hystrix
Spring Cloud
Consul

40. 12 factor app principles
40
Codebase
Depen-
dencies
Config
Backing
Services
Build
Release
Run
Processes
Port
Binding
Concurrency
Disposa-
bility
Dev/Prod
Parity
Logs
Admin
Processes
http://12factor.net

41. Demo
41
https://github.com/springone2gx2015/vehicle-fleet-demo

42. Demo
42

43. Spring & Cloud Native
43
Core Boot
Connectors Service
Registry
Config
Server
Circuit
Breaker
OpsDev

44. 44
#fundJUnit
• Pivotal sponsoring JUnit
• Developer Sponsor
• 6 weeks of senior developer
• Campaign Sponsor
• €5000 donation

45. Books
45
http://pivotal.io/
platform/migrating-to-
cloud-native-
application-
architectures-ebook

46. Books
46

47. Books
47

48. 48

49. • Full-Day Workshop
• Several Spring Speakers
49
Delivering Cloud Native
Applications with Spring
and Cloud Foundry

50. Questions?
50

51. Thank You!
51
Credits:
Justin Blake, nathanbui, Bohdan Burmich, David Waschbüsch, Gabriele Malaspina, Creative Stall, Aha-Soft
https://github.com/ghillert/
ajug-spring-update
@ghillert @royclarkson@cppwfs
@springcentral