In this tutorial, we show you how to develop a simple RESTfull web service application with embedded jetty server using cuubez framwork.
Technologies and Tools used in this article:
- cuubez 1.1.1
- JDK 1.7
- Maven 3.0.3
- Intellij IDEA 13.1.1
Note: If you want to know what and how REST works, just search on Google, ton of available resources.
1. Directory Structure
This is the final web project structure of this tutorial.
2. Standard Java Project
Create a standard Maven java project structure
mvn archetype:generate -DgroupId=com.cuubez -DartifactId=cuubez-jetty -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
Note: To support IntelliJ IDEA, use Maven command :
mvn idea:idea
3. Project Dependencies
Following maven dependencies should add to the pom.xml file.
File : pom.xml
<dependency>
<groupId>com.cuubez</groupId>
<artifactId>cuubez-core</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-servlet</artifactId>
<version>8.0.4.v20111024</version>
</dependency>
4. REST Service
@Path("/users/{userId}")
@Produces(MediaType.APPLICATION_JSON)
public class UserResource {
private static Log log = LogFactory.getLog(UserResource.class);
@GET
@Produces(MediaType.APPLICATION_JSON)
public Response userGet(@PathParam(value = "userId") String id, @QueryParam(value = "name") String name, @QueryParam(value = "age") int age) {
User user = new User(id, age, name);
return Response.ok().entity(user).build();
}
@Consumes(MediaType.APPLICATION_JSON)
@POST
public void userPost(User user) {
log.info("POST = [" + user + "]");
}
@PUT
@Consumes({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
public void userPut(User user) {
log.info("PUT = [" + user + "]");
}
} 5. Embedded Jetty Implementation
public class JettyServer {
public static void main(String args[]) {
Server server = new Server(8080);
ServletContextHandler handler = new ServletContextHandler(ServletContextHandler.SESSIONS);
server.setHandler(handler);
handler.setContextPath("/");
handler.setResourceBase(".");
handler.addEventListener(new BootstrapContextListener()); //cuubez bootstrap context listner
handler.addServlet(HttpServletDispatcher.class, "/rest/*"); //servlet filter
try {
server.start();
server.join();
} catch (Exception e) {
e.printStackTrace();
}
}
} 6. Demo
In this example, web request from projectURL/rest/users/id-1003 will match to UserResource, via @Path("/users/{userId}"). {userId} will match to parameter annotated with @PathParam and age and name will match to parameters annotated with @QueryParam
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