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@ -1,29 +1,29 @@
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# Spring Zero
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Spring Zero is "Spring for Snowboarders". If you are kewl, or just impatient, and you
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want to use Spring, then this is the place to be. Spring Zero is the code-name for a
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group of related technologies, that will get you up and running with
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Spring-powered, production-grade applications and services with absolute minimum fuss.
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It takes an opinionated view of the Spring family so that new and existing users can
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quickly get to the bits they need. Assumes limited knowledge of the Java development
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# Spring Boot
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Spring Boot is "Spring for Snowboarders". If you are kewl, or just impatient, and you
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want to use Spring, then this is the place to be. Spring Boot is the code-name for a
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group of related technologies, that will get you up and running with
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Spring-powered, production-grade applications and services with absolute minimum fuss.
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It takes an opinionated view of the Spring family so that new and existing users can
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quickly get to the bits they need. Assumes limited knowledge of the Java development
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ecosystem. Absolutely no code generation and no XML (unless you really want it).
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The goals are:
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* Radically faster and widely accessible getting started experience for Spring
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development
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* Be opinionated out of the box, but get out of the way quickly as requirements start to
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* Be opinionated out of the box, but get out of the way quickly as requirements start to
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diverge from the defaults
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* Provide a range of non-functional features that are common to large classes of projects
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(e.g. embedded servers, security, metrics, health checks, externalized configuration)
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* First class support for REST-ful services, modern web applications, batch jobs, and
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* First class support for REST-ful services, modern web applications, batch jobs, and
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enterprise integration
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* Applications that adapt their behavior or configuration to their environment
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* Optionally use Groovy features like DSLs and AST transformations to accelerate the
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* Optionally use Groovy features like DSLs and AST transformations to accelerate the
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implementation of basic business requirements
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## Installing
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You need to [build from source](#building-from-source) for now, but when it's done
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You need to [build from source](#building-from-source) for now, but when it's done
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instructions will look like this:
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1) Get Java. Download and install the Java SDK from [www.java.com](http://www.java.com)
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@ -36,20 +36,20 @@ instructions will look like this:
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## Building from source
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Spring Zero can be [built with maven](http://maven.apache.org/run-maven/index.html) v3.0
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Spring Zero can be [built with maven](http://maven.apache.org/run-maven/index.html) v3.0
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or above.
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$ mvn clean install
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An `alias` can be used for the Spring Zero command line tool:
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An `alias` can be used for the Spring Boot command line tool:
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$ alias spring="java -jar ~/.m2/repository/org/springframework/boot/spring-cli/0.5.0.BUILD-SNAPSHOT/spring-cli-0.5.0.BUILD-SNAPSHOT.jar"
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_Also see [docs/CONTRIBUTING](docs/CONTRIBUTING.md) if you want to submit pull requests._
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_Also see [docs/CONTRIBUTING](docs/CONTRIBUTING.md) if you want to submit pull requests._
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## Quick Start Example
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The Spring Zero command line tool uses Groovy underneath so that we can present simple
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The Spring Zero command line tool uses Groovy underneath so that we can present simple
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snippets that can just run, for example:
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$ cat > app.groovy
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@ -67,18 +67,18 @@ snippets that can just run, for example:
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Hello World!
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If you don't want to use the command line tool, or you would rather work using Java and
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an IDE you can. Just add a `main()` method that calls `SpringApplication` and
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If you don't want to use the command line tool, or you would rather work using Java and
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an IDE you can. Just add a `main()` method that calls `SpringApplication` and
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add `@EnableAutoConfiguration`:
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import org.springframework.stereotype.*;
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import org.springframework.web.bind.annotation.*;
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import org.springframework.boot.context.annotation.*;
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@Controller
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@EnableAutoConfiguration
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public class SampleController {
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@RequestMapping("/")
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@ResponseBody
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String home() {
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@ -88,83 +88,83 @@ add `@EnableAutoConfiguration`:
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public static void main(String[] args) throws Exception {
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SpringApplication.run(SampleController.class, args);
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}
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}
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_NOTE: the above example assumes your build system has imported the `spring-starter-web`
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maven pom._
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## Spring Zero Components
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There are a number of components in Zero. Here are the important ones:
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## Spring Boot Components
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There are a number of components in Boot. Here are the important ones:
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### The Spring CLI
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The 'spring' command line application compiles and runs Groovy source, making it super
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easy to write the absolute minimum of code to get an application running. Spring CLI
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The 'spring' command line application compiles and runs Groovy source, making it super
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easy to write the absolute minimum of code to get an application running. Spring CLI
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can also watch files, automatically recompiling and restarting when they change.
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*See [spring-cli/README](spring-cli/README.md).*
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### Spring Bootstrap
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The main library providing features that support the other parts of Spring Zero.
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### Spring Boot
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The main library providing features that support the other parts of Spring Boot.
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Features include:
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* `SpringApplication` - a class with static convenience methods that make it really easy
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to write a standalone Spring Application. Its sole job is to create and refresh an
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* `SpringApplication` - a class with static convenience methods that make it really easy
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to write a standalone Spring Application. Its sole job is to create and refresh an
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appropriate Spring `ApplicationContext`.
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* 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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* First class externalized configuration support
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_See [spring-boot/README](spring-boot/README.md)._
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### Spring Autoconfigure
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Spring Zero can configure large parts of common applications based on detecting the
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content of the classpath and any existing application context. A single
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`@EnableAutoConfigure` annotation triggers auto-configuration of the Spring context.
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Spring Zero can configure large parts of common applications based on detecting the
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content of the classpath and any existing application context. A single
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`@EnableAutoConfigure` annotation triggers auto-configuration of the Spring context.
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Auto-configuration attempts to guess what beans a user might want based on their
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classpath. For example, If a 'HSQLDB' is on the classpath the user probably wants an
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in-memory database to be defined. Auto-configuration will back away as the user starts
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Auto-configuration attempts to guess what beans a user might want based on their
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classpath. For example, If a 'HSQLDB' is on the classpath the user probably wants an
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in-memory database to be defined. Auto-configuration will back away as the user starts
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to define their own beans.
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_See [spring-autoconfigure/README](spring-autoconfigure/README.md)._
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### Spring Actuator
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Spring Actuator uses auto-configuration to decorate your application with features that
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make it instantly deployable and supportable in production. For instance if you are
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Spring Actuator uses auto-configuration to decorate your application with features that
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make it instantly deployable and supportable in production. For instance if you are
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writing a JSON web service then it will provide a server, security, logging, externalized
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configuration, management endpoints, an audit abstraction, and more. If you want to
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configuration, management endpoints, an audit abstraction, and more. If you want to
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switch off the built in features, or extend or replace them, it makes that really easy as well.
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_See [spring-actuator/README](spring-actuator/README.md)._
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### Spring Starters
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Spring Starters are a set of convenient dependency descriptors that you can include in
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your application. You get a one-stop-shop for all the Spring and related technology
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Spring Starters are a set of convenient dependency descriptors that you can include in
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your application. You get a one-stop-shop for all the Spring and related technology
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that you need without having to hunt through sample code and copy paste loads of
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dependency descriptors. For example, if you want to get started using Spring and JPA for
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dependency descriptors. For example, if you want to get started using Spring and JPA for
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database access just include one dependency in your project, and you are good to go.
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_See [spring-starters/README](spring-starters/README.md)._
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### Packaging
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The [spring-launcher](spring-launcher/) and
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The [spring-launcher](spring-launcher/) and
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[spring-maven-packaging-plugin](spring-maven-packaging-plugin) provide a convenient way
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to package you application for release. Applications can be released as a single jar
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file that can simply be launched using `java -jar`.
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_See [spring-launcher/README](spring-launcher/README.md) &
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_See [spring-launcher/README](spring-launcher/README.md) &
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[spring-package-maven-plugin/README](spring-package-maven-plugin/README.md)._
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## Samples
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Groovy samples for use with the command line application are available in
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[spring-cli/samples](spring-cli/samples/#). To run the CLI samples type
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[spring-cli/samples](spring-cli/samples/#). To run the CLI samples type
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`spring run <sample>.groovy` from samples directory.
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Java samples are available in [spring-boot-sample](spring-boot-samples/#) and should
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@ -181,8 +181,8 @@ samples are provided:
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* spring-sample-data-jpa - Spring Data JPA + Hibernate + HSQLDB
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* spring-boot-sample-integration - A spring integration application
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* spring-boot-sample-profile - example showing Spring's `@profile` support
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* spring-boot-sample-traditional - shows Spring Zero with more traditional WAR packaging
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* spring-boot-sample-traditional - shows Spring Zero with more traditional WAR packaging
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(but also executable using `java -jar`)
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* spring-boot-sample-xml - Example show how Spring Zero can be mixed with trditional XML
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* spring-boot-sample-xml - Example show how Spring Boot can be mixed with traditional XML
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configuration
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Phillip Webb
11 years ago