GitHub - royudassin/spring-boot: Spring Boot
Spring Boot makes it easy to create Spring-powered, production-grade applications and services with absolute minimum fuss. It takes an opinionated view of the Spring platform so that new and existing users can quickly get to the bits they need.
You can use Spring Boot to create stand-alone Java applications that can be started using
java -jar or more traditional WAR deployments. We also provide a command line tool
that runs spring scripts.
Our primary goals are:
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Provide a radically faster and widely accessible getting started experience for all Spring development
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Be opinionated out of the box, but get out of the way quickly as requirements start to diverge from the defaults
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Provide a range of non-functional features that are common to large classes of projects (e.g. embedded servers, security, metrics, health checks, externalized configuration)
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Absolutely no code generation and no requirement for XML configuration
Modules
There are a number of modules in Spring Boot, here is a quick overview:
spring-boot
The main library providing features that support the other parts of Spring Boot, these include:
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The
SpringApplicationclass, providing static convenience methods that make it easy to write a stand-alone Spring Application. Its sole job is to create and refresh an appropriate SpringApplicationContext -
Embedded web applications with a choice of container (Tomcat or Jetty for now)
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First class externalized configuration support
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Convenience
ApplicationContextinitializers, including support for sensible logging defaults
spring-boot-autoconfigure
Spring Boot can configure large parts of common applications based on the content
of their classpath. A single @EnableAutoConfiguration annotation triggers
auto-configuration of the Spring context.
Auto-configuration attempts to deduce which beans a user might need. For example, If
HSQLDB is on the classpath, and the user has not configured any database connections,
then they probably want an in-memory database to be defined. Auto-configuration will
always back away as the user starts to define their own beans.
spring-boot-starters
Starters are a set of convenient dependency descriptors that you can include in
your application. You get a one-stop-shop for all the Spring and related technology
that you need without having to hunt through sample code and copy paste loads of
dependency descriptors. For example, if you want to get started using Spring and JPA for
database access just include the spring-boot-starter-data-jpa dependency in your
project, and you are good to go.
spring-boot-cli
The Spring command line application compiles and runs Groovy source, making it super easy to write the absolute minimum of code to get an application running. Spring CLI can also watch files, automatically recompiling and restarting when they change.
spring-boot-actuator
Spring Boot Actuator provides additional auto-configuration to decorate your application with features that make it instantly deployable and supportable in production. For instance if you are writing a JSON web service then it will provide a server, security, logging, externalized configuration, management endpoints, an audit abstraction, and more. If you want to switch off the built in features, or extend or replace them, it makes that really easy as well.