readme

README.adoc → README.md

-:spring_boot_version: 2.0.3.RELEASE
-:spring-boot: https://github.com/spring-projects/spring-boot
-:toc:
-:icons: font
-:source-highlighter: prettify
-:project_id: gs-spring-boot
 This guide provides a sampling of how {spring-boot}[Spring Boot] helps you accelerate and facilitate application development. As you read more Spring Getting Started guides, you will see more use cases for Spring Boot.
 It is meant to give you a quick taste of Spring Boot. If you want to create your own Spring Boot-based project, visit
 http://start.spring.io/[Spring Initializr], fill in your project details, pick your options, and you can download either
 a Maven build file, or a bundled up project as a zip file.
 
-== What you'll build
+## What you'll build
 You'll build a simple web application with Spring Boot and add some useful services to it.
 
-== What you'll need
+## What you'll need
 
-:java_version: 1.8
 include::https://raw.githubusercontent.com/spring-guides/getting-started-macros/master/prereq_editor_jdk_buildtools.adoc[]
 
 include::https://raw.githubusercontent.com/spring-guides/getting-started-macros/master/how_to_complete_this_guide.adoc[]
 
 include::https://raw.githubusercontent.com/spring-guides/getting-started-macros/master/hide-show-sts.adoc[]
 
-== Learn what you can do with Spring Boot
+## Learn what you can do with Spring Boot
 
 Spring Boot offers a fast way to build applications. It looks at your classpath and at beans you have configured, makes reasonable assumptions about what you're missing, and adds it. With Spring Boot you can focus more on business features and less on infrastructure.
 
 
 NOTE: Spring Boot doesn't generate code or make edits to your files. Instead, when you start up your application, Spring Boot dynamically wires up beans and settings and applies them to your application context.
 
-== Create a simple web application
+## Create a simple web application
 Now you can create a web controller for a simple web application.
 
 `src/main/java/hello/HelloController.java`
-[source,java]
-----
+```
 include::initial/src/main/java/hello/HelloController.java[]
-----
+```
 
 The class is flagged as a `@RestController`, meaning it's ready for use by Spring MVC to handle web requests. `@RequestMapping` maps `/` to the `index()` method. When invoked from a browser or using curl on the command line, the method returns pure text. That's because `@RestController` combines `@Controller` and `@ResponseBody`, two annotations that results in web requests returning data rather than a view.
 
-== Create an Application class
+## Create an Application class
 Here you create an `Application` class with the components:
 
 `src/main/java/hello/Application.java`
-[source,java]
-----
+
+```
 include::complete/src/main/java/hello/Application.java[]
-----
+```
 
 include::https://raw.githubusercontent.com/spring-guides/getting-started-macros/master/spring-boot-application.adoc[]
 
 There is also a `CommandLineRunner` method marked as a `@Bean` and this runs on start up. It retrieves all the beans that were created either by your app or were automatically added thanks to Spring Boot. It sorts them and prints them out.
 
-== Run the application
+## Run the application
 To run the application, execute:
 
-[subs="attributes"]
-----
+
+```
 ./gradlew build && java -jar build/libs/{project_id}-0.1.0.jar
-----
+```
 
 If you are using Maven, execute:
 
-[subs="attributes"]
-----
+
+```
 mvn package && java -jar target/{project_id}-0.1.0.jar
-----
+```
 
 You should see some output like this:
 
 Greetings from Spring Boot!
 ....
 
-== Add Unit Tests
+## Add Unit Tests
 
 You will want to add a test for the endpoint you added, and Spring Test already provides some machinery for that, and it's easy to include in your project.
 
 Add this to your build file's list of dependencies:
 
 [source,groovy]
-----
+```
 include::complete/build.gradle[tag=tests]
-----
+```
 
 If you are using Maven, add this to your list of dependencies:
 
 [source,xml]
-----
+```
 include::complete/pom.xml[tag=tests]
-----
+```
 
 Now write a simple unit test that mocks the servlet request and response through your endpoint:
 
 `src/test/java/hello/HelloControllerTest.java`
-[source,java]
-----
+
+```
 include::complete/src/test/java/hello/HelloControllerTest.java[]
-----
+```
 
 The `MockMvc` comes from Spring Test and allows you, via a set of convenient builder classes, to send HTTP requests into the `DispatcherServlet` and make assertions about the result. Note the use of the `@AutoConfigureMockMvc` together with `@SpringBootTest` to inject a `MockMvc` instance. Having used `@SpringBootTest` we are asking for the whole application context to be created.  An alternative would be to ask Spring Boot to create only the web layers of the context using the `@WebMvcTest`. Spring Boot automatically tries to locate the main application class of your application in either case, but you can override it, or narrow it down, if you want to build something different.
 
 As well as mocking the HTTP request cycle we can also use Spring Boot to write a very simple full-stack integration test. For example, instead of (or as well as) the mock test above we could do this:
 
 `src/test/java/hello/HelloControllerIT.java`
-[source,java]
-----
+
+```
 include::complete/src/test/java/hello/HelloControllerIT.java[]
-----
+```
 
 The embedded server is started up on a random port by virtue of the `webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT` and the actual port is discovered at runtime with the `@LocalServerPort`.
 
-== Add production-grade services
+## Add production-grade services
 If you are building a web site for your business, you probably need to add some management services. Spring Boot provides several out of the box with its http://docs.spring.io/spring-boot/docs/{spring_boot_version}/reference/htmlsingle/#production-ready[actuator module], such as health, audits, beans, and more.
 
 Add this to your build file's list of dependencies:
 
 [source,groovy]
-----
+```
 include::complete/build.gradle[tag=actuator]
-----
+```
 
 If you are using Maven, add this to your list of dependencies:
 
 [source,xml]
-----
+```
 include::complete/pom.xml[tag=actuator]
-----
+```
 
 Then restart the app:
 
-[subs="attributes"]
-----
+
+```
 ./gradlew build && java -jar build/libs/{project_id}-0.1.0.jar
-----
+```
 
 If you are using Maven, execute:
 
-[subs="attributes"]
-----
+
+```
 mvn package && java -jar target/{project_id}-0.1.0.jar
-----
+```
 
 You will see a new set of RESTful end points added to the application. These are management services provided by Spring Boot.
 
 
 It's easy to check the health of the app.
 
-----
+```
 $ curl localhost:8080/actuator/health
 {"status":"UP"}
-----
+```
 
 You can try to invoke shutdown through curl.
 
-----
+```
 $ curl -X POST localhost:8080/actuator/shutdown
 {"timestamp":1401820343710,"error":"Method Not Allowed","status":405,"message":"Request method 'POST' not supported"}
-----
+```
 
 Because we didn't enable it, the request is blocked by the virtue of not existing.
 
 For more details about each of these REST points and how you can tune their settings with an `application.properties` file, you can read detailed http://docs.spring.io/spring-boot/docs/{spring_boot_version}/reference/htmlsingle/#production-ready-endpoints[docs about the endpoints].
 
-== View Spring Boot's starters
+## View Spring Boot's starters
 You have seen some of http://docs.spring.io/spring-boot/docs/{spring_boot_version}/reference/htmlsingle/#using-boot-starter[Spring Boot's "starters"]. You can see them all https://github.com/spring-projects/spring-boot/tree/master/spring-boot-project/spring-boot-starters[here in source code].
 
-== JAR support and Groovy support
+## JAR support and Groovy support
 The last example showed how Spring Boot makes it easy to wire beans you may not be aware that you need. And it showed how to turn on convenient management services.
 
 But Spring Boot does yet more. It supports not only traditional WAR file deployments, but also makes it easy to put together executable JARs thanks to Spring Boot's loader module. The various guides demonstrate this dual support through the `spring-boot-gradle-plugin` and `spring-boot-maven-plugin`.
 Create a new file called **app.groovy** and put the following code in it:
 
 [source,groovy]
-----
+```
 @RestController
 class ThisWillActuallyRun {
 
     }
 
 }
-----
+```
 
 NOTE: It doesn't matter where the file is. You can even fit an application that small inside a https://twitter.com/rob_winch/status/364871658483351552[single tweet]!
 
 
 Run it as follows:
 
-----
+```
 $ spring run app.groovy
-----
+```
 
 NOTE: This assumes you shut down the previous application, to avoid a port collision.
 
 From a different terminal window:
-----
+```
 $ curl localhost:8080
 Hello World!
-----
+```
 
 Spring Boot does this by dynamically adding key annotations to your code and using http://groovy.codehaus.org/Grape[Groovy Grape] to pull down libraries needed to make the app run.
 
-== Summary
+## Summary
 Congratulations! You built a simple web application with Spring Boot and learned how it can ramp up your development pace. You also turned on some handy production services.
 This is only a small sampling of what Spring Boot can do. Checkout http://docs.spring.io/spring-boot/docs/{spring_boot_version}/reference/htmlsingle[Spring Boot's online docs]
 if you want to dig deeper.
 
-== See Also
+## See Also
 
 The following guides may also be helpful: