My talk at JEEConf 2015

1. Spring Boot.
Boot up your development
Sergey Morenets, May 23, 2015
morenets@mail.ru

2. About author
• Works in IT since 2000
• 11 years of Java SE/EE experience
• Multiple speaker at Java User Group
• Founder of http://it-simulator.com
• Author of “Main Java programming errors”
and “Development of Java applications”
books

3. Agenda
• Overview
• Spring Boot features
• Setup & configuration
• Q&A

4. Goal

5. Goal
• Development environment
• Launch web application
• Minimum configuration

6. Plugins

7. Plugins

8. Spring Boot
• Stand-alone Spring applications
• Embed Tomcat or Jetty directly
• Automatically Spring configuration
• Absolutely no code generation and no
requirement for XML configuration
• Convention-over-configuration
• Focus on business features and less on
infrastructure

9. Starters concept
• Aggregate modules
• Trusted versions of libraries
• Similar to micro-service architecture

10. Starters concept
• spring-boot-starter-actuator
• spring-boot-starter-data-jpa
• spring-boot-starter-jdbc
• spring-boot-starter-jersey
• spring-boot-starter-logging
• spring-boot-starter-mobile
• spring-boot-starter-redis
• spring-boot-starter-test
• spring-boot-starter-web

11. Spring Boot

12. Spring Boot

13. Spring Boot

14. Servlets

15. Filters

16. Spring Boot plugin

17. Spring Boot plugin
• spring-boot:run
• spring-boot:repackage

18. Hot replace

19. Hot replace

20. Dependencies

21. Dependencies

22. Customization

23. Tomcat 7

24. Jetty

25. Auto-configuration
• AopAutoConfiguration
• JpaRepositoriesAutoConfiguration
• HibernateJpaAutoConfiguration
• DataSourceAutoConfiguration
• JmsTemplateAutoConfiguration
• MongoAutoConfiguration
• RedisAutoConfiguration
• WebMvcAutoConfiguration
• SecurityAutoConfiguration

26. Properties

27. Properties

28. Properties
Class Prefix
MessageSourceAutoConfiguration spring.messages
BatchProperties spring.batch
ElasticsearchProperties spring.data.elasticsearch
FreeMarkerProperties spring.freemarker
JacksonProperties spring.jackson
DataSourceProperties spring.datasource
JerseyProperties spring.jersey
MailProperties spring.mail
MongoProperties spring.data.mongodb
SecurityProperties security
WebMvcProperties spring.mvc

29. Properties

30. Production

31. Production
• Industry not ready
• Limited web servers support
• No UI
• Spring Boot knowledge

32. Spring Boot Actuator
• Helps manage and monitor applications
when pushed to production
• Accessible via HTTP, JMX or remote shell
• You can't manage what you can't measure

33. Spring Boot Actuator
• Series of endpoints to help manage your
Spring application
• Reads properties and spring beans and
then returns a JSON view
• Allows direct access to non functional
application information without having to
open an IDE or a command prompt

34. Spring Boot Actuator

35. Spring Boot Actuator
• /info
• /health
• /beans
• /env
• /dump
• /metrics
• /trace
• /autoconfigurationreport
• /shutdown

36. Spring Boot Actuator. Health
Indicators
DiskSpaceHealthIndicator Checks for low disk space.
DataSourceHealthIndicator Checks that a connection to
DataSource can be obtained.
MongoHealthIndicator Checks that a Mongo database is
up.
RabbitHealthIndicator Checks that a Rabbit server is up.
RedisHealthIndicator Checks that a Redis server is up.
SolrHealthIndicator Checks that a Solr server is up.

37. Spring Boot Actuator. Health

38. Spring Boot Actuator. Health

39. Spring Boot Actuator. Info

40. Spring Boot Actuator. Info

41. Spring Boot Actuator.Metrics
• Includes a metrics service with ‘gauge’
and ‘counter’ support
• A ‘gauge’ records a single value; and a
‘counter’ records a delta (an increment or
decrement)
• Metrics for all HTTP requests are
automatically recorded

42. Spring Boot Actuator.Metrics
• System metrics
• Datasource metrics
• WebServer metrics
• Custom metrics

43. Spring Boot Actuator. Metrics

44. Spring Boot Actuator. Custom metrics

45. Spring Boot Actuator. Metrics

46. Spring Boot Actuator. Repository

47. Spring Boot Actuator. Repository
• Dropwizard
• Zabbix
• JMX messaging

48. Security
• Mostly local usage
• Read-only access
• Integration with Spring Security

49. Security

50. Security

51. Manuals

52. Pro
• Reduces deployment and development
time
• No configuration files
• Auto-configuration
• Maven, Gradle & Ant integration
• Embedded servers
• Multiple technologies support
• Monitoring & management out-of-box

53. Cons
• Based on Spring Framework
• Additional configuration for web servers

54. Dropwizard
• Lightweight alternative
• REST web services support using Jersey
• Embedded servers
• Logging and validation
• Templating systems
• Metrics library

55. Q&A