- A Mac
- Atom
- Java JDK 1.8
- Gradle 2.10
- Create a project folder
mkdir gs-rest-service
cd gs-rest-service
- Create a Gradle build script
touch build.gradle
atom build.gradle
Copy the contents from this Initial Gradle build script to the build.gradle file
- Create the project directory structure
mkdir -p src/main/java/hello
- Create a resource representation class
touch src/main/java/hello/Greeting.java
atom src/main/java/hello/Greeting.java
Add the following
package hello;
public class Greeting {
private final long id;
private final String content;
public Greeting(long id, String content) {
this.id = id;
this.content = content;
}
public long getId() {
return id;
}
public String getContent() {
return content;
}
}
- Create a resource controller
touch src/main/java/hello/GreetingController.java
atom src/main/java/hello/GreetingController.java
Add the following
package hello;
import java.util.concurrent.atomic.AtomicLong;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class GreetingController {
private static final String template = "Hello, %s!";
private final AtomicLong counter = new AtomicLong();
@RequestMapping("/greeting")
public Greeting greeting(@RequestParam(value="name", defaultValue="World") String name) {
return new Greeting(counter.incrementAndGet(),
String.format(template, name));
}
}
- Make it executable
touch src/main/java/hello/Application.java
atom src/main/java/hello/Application.java
Add the following
package hello;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
- Run it
- The one liner
gradle bootRun
- Build and run
gradle Build
java -jar build/libs/gs-rest-service-0.1.0.jar
- Test the thing
http://localhost:8080/greeting
{"id":1,"content":"Hello, World!"}
http://localhost:8080/greeting?name=bob
{"id":2,"content":"Hello, bob!"}