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RESTfu­­l Jav­a­ wit­h ­JAX­-­­RS 2.­0­ (Second Edition)

Injection Annotations (2)

This project is a simple example showing usage of JAX-RS injection annotations.

System Requirements:

  • Maven 2.0.9 or higher

Building the project:

  1. In root directoy mvn jetty:run

This will build a WAR and run it with embedded Jetty

Then open browser and go to: http://localhost:8080

Submit form and follow links.

Source Code

Hierarchy

ex05_2
|-- pom.xml
`-- src
    `-- main
        |-- java
        |   `-- com
        |       `-- restfully
        |           `-- shop
        |               |-- domain
        |               |   `-- Customer.java
        |               `-- services
        |                   |-- CustomerResource.java
        |                   `-- ShoppingApplication.java
        `-- webapp
            |-- WEB-INF
            |   `-- web.xml
            `-- index.html

Details

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <parent>
        <groupId>com.oreilly.rest.workbook</groupId>
        <artifactId>jaxrs-2.0-workbook-pom</artifactId>
        <version>1.0</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.oreilly.rest.workbook</groupId>
    <artifactId>jaxrs-2.0-workbook-ex05_2</artifactId>
    <version>2.0</version>
    <packaging>war</packaging>
    <name>ex05_2</name>
    <description/>

    <dependencies>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jaxrs</artifactId>
            <version>3.0.12.Final-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-client</artifactId>
            <version>3.0.12.Final-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>async-http-servlet-3.0</artifactId>
            <version>3.0.12.Final-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>jaxrs-api</artifactId>
            <version>3.0.12.Final-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-servlet-initializer</artifactId>
            <version>3.0.12.Final-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.1</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <finalName>ex05_2</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-deploy-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>9.0.6.v20130930</version>
                <configuration>
                    <webApp>
                        <contextPath>/</contextPath>
                    </webApp>
                    <scanIntervalSeconds>10</scanIntervalSeconds>
                    <stopKey>foo</stopKey>
                    <stopPort>9999</stopPort>
                    <stopWait>1</stopWait>
                </configuration>
                <executions>
                    <execution>
                        <id>start-jetty</id>
                        <phase>pre-integration-test</phase>
                        <goals>
                            <goal>run</goal>
                        </goals>
                        <configuration>
                            <scanIntervalSeconds>0</scanIntervalSeconds>
                            <daemon>true</daemon>
                        </configuration>
                    </execution>
                    <execution>
                        <id>stop-jetty</id>
                        <phase>post-integration-test</phase>
                        <goals>
                            <goal>stop</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
                <executions>
                    <execution>
                        <id>surefire-it</id>
                        <phase>integration-test</phase>
                        <goals>
                            <goal>test</goal>
                        </goals>
                        <configuration>
                            <skip>false</skip>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

src/main/webapp/WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
      version="3.0">
</web-app>

src/main/webapp/index.html

<html>
<body>

<form action="/services/customers" method="post">
    First Name: <input type="text" name="firstname"/><br/>
    Last Name: <input type="text" name="lastname"/><br/>
    <INPUT type="submit" value="Send">
</form>

</body>
</html>

src/main/java/com/restfully/shop/domain/Customer.java

package com.restfully.shop.domain;

public class Customer
{
   private int id;
   private String firstName;
   private String lastName;
   private String street;
   private String city;
   private String state;
   private String zip;
   private String country;

   public int getId()
   {
      return id;
   }

   public void setId(int id)
   {
      this.id = id;
   }

   public String getFirstName()
   {
      return firstName;
   }

   public void setFirstName(String firstName)
   {
      this.firstName = firstName;
   }

   public String getLastName()
   {
      return lastName;
   }

   public void setLastName(String lastName)
   {
      this.lastName = lastName;
   }

   public String getStreet()
   {
      return street;
   }

   public void setStreet(String street)
   {
      this.street = street;
   }

   public String getCity()
   {
      return city;
   }

   public void setCity(String city)
   {
      this.city = city;
   }

   public String getState()
   {
      return state;
   }

   public void setState(String state)
   {
      this.state = state;
   }

   public String getZip()
   {
      return zip;
   }

   public void setZip(String zip)
   {
      this.zip = zip;
   }

   public String getCountry()
   {
      return country;
   }

   public void setCountry(String country)
   {
      this.country = country;
   }
}

src/main/java/com/restfully/shop/services/CustomerResource.java

package com.restfully.shop.services;

import com.restfully.shop.domain.Customer;

import javax.ws.rs.CookieParam;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.NewCookie;
import javax.ws.rs.core.Response;
import java.net.URI;
import java.text.DateFormat;
import java.util.Date;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;

@Path("/customers")
public class CustomerResource
{
   private Map<Integer, Customer> customerDB = new ConcurrentHashMap<Integer, Customer>();
   private AtomicInteger idCounter = new AtomicInteger();

   public CustomerResource()
   {
   }

   @POST
   @Produces("text/html")
   public Response createCustomer(@FormParam("firstname") String first,
                                  @FormParam("lastname") String last)
   {
      Customer customer = new Customer();
      customer.setId(idCounter.incrementAndGet());
      customer.setFirstName(first);
      customer.setLastName(last);
      customerDB.put(customer.getId(), customer);
      System.out.println("Created customer " + customer.getId());
      String output = "Created customer <a href=\"customers/" + customer.getId() + "\">" + customer.getId() + "</a>";
      String lastVisit = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.LONG).format(new Date());
      URI location = URI.create("/customers/" + customer.getId());
      return Response.created(location)
              .entity(output)
              .cookie(new NewCookie("last-visit", lastVisit))
              .build();

   }

   @GET
   @Path("{id}")
   @Produces("text/plain")
   public Response getCustomer(@PathParam("id") int id,
                               @HeaderParam("User-Agent") String userAgent,
                               @CookieParam("last-visit") String date)
   {
      final Customer customer = customerDB.get(id);
      if (customer == null)
      {
         throw new WebApplicationException(Response.Status.NOT_FOUND);
      }
      String output = "User-Agent: " + userAgent + "\r\n";
      output += "Last visit: " + date + "\r\n\r\n";
      output += "Customer: " + customer.getFirstName() + " " + customer.getLastName();
      String lastVisit = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.LONG).format(new Date());
      return Response.ok(output)
              .cookie(new NewCookie("last-visit", lastVisit))
              .build();
   }

}

src/main/java/com/restfully/shop/services/ShoppingApplication.java

package com.restfully.shop.services;

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
import java.util.HashSet;
import java.util.Set;

@ApplicationPath("/services")
public class ShoppingApplication extends Application
{
   private Set<Object> singletons = new HashSet<Object>();

   public ShoppingApplication()
   {
      singletons.add(new CustomerResource());
   }

   @Override
   public Set<Object> getSingletons()
   {
      return singletons;
   }
}