{"id":1408,"date":"2012-06-12T01:00:00","date_gmt":"2012-06-12T01:00:00","guid":{"rendered":"http:\/\/www.javacodegeeks.com\/2012\/10\/resteasy-tutorial-part-1-basics.html"},"modified":"2014-02-26T17:13:23","modified_gmt":"2014-02-26T15:13:23","slug":"resteasy-tutorial-part-1-basics","status":"publish","type":"post","link":"https:\/\/www.javacodegeeks.com\/2012\/06\/resteasy-tutorial-part-1-basics.html","title":{"rendered":"RESTEasy Tutorial Part-1: Basics"},"content":{"rendered":"
RESTEasy is a JAX-RS implementation from JBoss\/RedHat and is in-built in JBoss 6 onwards.
\nHere I am going to show you how to develop a Simple RESTful Web Services application using RESTEasy and JBossAS7.1.1.FINAL.
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\n 
\nStep#1: Configure RESTEasy dependencies using Maven.<\/strong><\/p>\n
 <project xmlns='http:maven.apache.orgPOM4.0.0' \r\n   xmlns:xsi='http:www.w3.org2001XMLSchema-instance'\r\n   xsi:schemaLocation='http:maven.apache.orgPOM4.0.0 \r\n   http:maven.apache.orgmaven-v4_0_0.xsd'>\r\n   <modelVersion>4.0.0<modelVersion> \r\n \r\n   <groupId>com.sivalabs<groupId>\r\n   <artifactId>resteasy-demo<artifactId>\r\n   <version>0.1<version>  \r\n   <packaging>war<packaging>\r\n   <name>resteasy-demo Maven Webapp<name>\r\n     \r\n   <build>\r\n     <finalName>resteasy-demo<finalName>\r\n   <build>\r\n   \r\n   <dependencies>\r\n   \r\n     <dependency>\r\n       <groupId>junit<groupId>\r\n       <artifactId>junit<artifactId>\r\n    <version>4.8.2<version>\r\n       <scope>test<scope>\r\n     <dependency>\r\n \r\n     <dependency>\r\n      <groupId>org.jboss.resteasy<groupId>\r\n      <artifactId>resteasy-jaxrs<artifactId>\r\n   <version>2.3.2.FINAL<version>\r\n      <scope>provided<scope>\r\n     <dependency>\r\n \r\n     <dependency>\r\n      <groupId>org.jboss.resteasy<groupId>\r\n      <artifactId>resteasy-jaxb-provider<artifactId>\r\n   <version>2.3.2.FINAL<version>\r\n      <scope>provided<scope>\r\n     <dependency>\r\n \r\n     <dependency>\r\n      <groupId>org.jboss.resteasy<groupId>\r\n      <artifactId>jaxrs-api<artifactId>\r\n      <version>2.3.0.GA<version>\r\n      <scope>provided<scope>\r\n     <dependency>\r\n  <dependency>\r\n         <groupId>org.apache.httpcomponents<groupId>\r\n         <artifactId>httpclient<artifactId>\r\n         <version>4.1.2<version>\r\n   <scope>provided<scope>\r\n     <dependency>\r\n   <dependencies>\r\n   \r\n <project><\/pre>\n
Step#2: Configure RESTEasy in web.xml<\/strong><\/p>\n
 <web-app xmlns:xsi='http:www.w3.org2001XMLSchema-instance' \r\n   xmlns='http:java.sun.comxmlnsjavaee' \r\n   xmlns:web='http:java.sun.comxmlnsjavaeeweb-app_2_5.xsd' \r\n   xsi:schemaLocation='http:java.sun.comxmlnsjavaee \r\n   http:java.sun.comxmlnsjavaeeweb-app_3_0.xsd' \r\n   id='WebApp_ID' version='3.0'>\r\n \r\n   <listener>\r\n     <listener-class>org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap<listener-class>\r\n   <listener>\r\n   <servlet>\r\n     <servlet-name>Resteasy<servlet-name>\r\n     <servlet-class>org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher<servlet-class>\r\n   <servlet>\r\n   <servlet-mapping>\r\n     <servlet-name>Resteasy<servlet-name>\r\n     <url-pattern>rest*<url-pattern>\r\n   <servlet-mapping>\r\n   <context-param>\r\n     <param-name>resteasy.servlet.mapping.prefix<param-name>\r\n     <param-value>rest<param-value>\r\n   <context-param>\r\n   <context-param>\r\n         <param-name>resteasy.scan<param-name>\r\n         <param-value>true<param-value>\r\n     <context-param>\r\n <web-app><\/pre>\n
Step#3: Create User domain class, MockUserTable class to store User objects in-memory for testing purpose and UserResource class to expose CRUD operations on User as RESTful webservices.<\/strong>
 
<\/div> <\/div><\/p>\n
 package com.sivalabs.resteasydemo;\r\n \r\n import java.util.Date;\r\n \r\n import javax.xml.bind.annotation.XmlAccessType;\r\n import javax.xml.bind.annotation.XmlAccessorType;\r\n import javax.xml.bind.annotation.XmlRootElement;\r\n \r\n @XmlRootElement\r\n @XmlAccessorType(XmlAccessType.FIELD)\r\n public class User \r\n {\r\n  private Integer id;\r\n  private String name;\r\n  private String email;\r\n  private Date dob;\r\n  setters and getters\r\n }\r\n \r\n \r\n package com.sivalabs.resteasydemo;\r\n \r\n import java.util.ArrayList;\r\n import java.util.Date;\r\n import java.util.HashMap;\r\n import java.util.List;\r\n import java.util.Map;\r\n \r\n import com.sivalabs.resteasydemo.User;\r\n \r\n public class MockUserTable \r\n {\r\n \r\n  private static Map<Integer, User> USER_MAP = new HashMap<Integer, User>();\r\n  static\r\n  {\r\n   USER_MAP.put(1, new User(1,'admin','admin@gmail.com',new Date()));\r\n   USER_MAP.put(2, new User(2,'test','test@gmail.com',new Date()));\r\n  }\r\n \r\n  public static void save(User user){\r\n   USER_MAP.put(user.getId(), user);\r\n  }\r\n \r\n  public static User getById(Integer id){\r\n   return USER_MAP.get(id);\r\n  }\r\n \r\n  public static List<User> getAll(){\r\n   List<User> users = new ArrayList<User>(USER_MAP.values());\r\n   return users;\r\n  }\r\n  public static void delete(Integer id){\r\n   USER_MAP.remove(id);\r\n  } \r\n }\r\n \r\n \r\n package com.sivalabs.resteasydemo;\r\n \r\n import java.util.List;\r\n \r\n import javax.ws.rs.DELETE;\r\n import javax.ws.rs.GET;\r\n import javax.ws.rs.POST;\r\n import javax.ws.rs.Path;\r\n import javax.ws.rs.PathParam;\r\n import javax.ws.rs.Produces;\r\n import javax.ws.rs.core.GenericEntity;\r\n import javax.ws.rs.core.MediaType;\r\n import javax.ws.rs.core.Response;\r\n \r\n import com.sivalabs.resteasydemo.MockUserTable;\r\n \r\n @Path('users')\r\n @Produces(MediaType.APPLICATION_XML)\r\n public class UserResource \r\n {\r\n \r\n  @Path('')\r\n  @GET\r\n  public Response getUsersXML() \r\n  {\r\n   List<User> users = MockUserTable.getAll();\r\n   GenericEntity<List<User>> ge = new GenericEntity<List<User>>(users){};\r\n   return Response.ok(ge).build();\r\n  }\r\n \r\n  @Path('{id}')\r\n  @GET\r\n  public Response getUserXMLById(@PathParam('id') Integer id) {\r\n   return Response.ok(MockUserTable.getById(id)).build();\r\n  }\r\n \r\n  @Path('')\r\n  @POST\r\n  public Response saveUser(User user) {\r\n   MockUserTable.save(user);\r\n   return Response.ok('<status>success<status>').build();\r\n  }\r\n \r\n  @Path('{id}')\r\n  @DELETE\r\n  public Response deleteUser(@PathParam('id') Integer id) {\r\n   MockUserTable.delete(id);\r\n   return Response.ok('<status>success<status>').build();\r\n  }\r\n \r\n }<\/pre>\n
Step#6: JUnit TestCase to test the REST Webservice.<\/strong><\/p>\n
 package com.sivalabs.resteasydemo;\r\n \r\n import java.util.List;\r\n \r\n import org.jboss.resteasy.client.ClientRequest;\r\n import org.jboss.resteasy.client.ClientResponse;\r\n import org.jboss.resteasy.util.GenericType;\r\n import org.junit.Assert;\r\n import org.junit.Test;\r\n \r\n import com.sivalabs.resteasydemo.User;\r\n \r\n public class UserResourceTest {\r\n \r\n  static final String ROOT_URL = 'http:localhost:8080resteasy-demorest';\r\n \r\n  @Test\r\n  public void testGetUsers() throws Exception \r\n  {\r\n   ClientRequest request = new ClientRequest(ROOT_URL+'users');\r\n   ClientResponse<List<User>> response = request.get(new GenericType<List<User>>(){});\r\n   List<User> users = response.getEntity();\r\n   Assert.assertNotNull(users);\r\n  }\r\n \r\n  @Test\r\n  public void testGetUserById() throws Exception \r\n  {\r\n   ClientRequest request = new ClientRequest(ROOT_URL+'users1');\r\n   ClientResponse<User> response = request.get(User.class);\r\n   User user = response.getEntity();\r\n   Assert.assertNotNull(user);\r\n  }\r\n \r\n  @Test\r\n  public void testSaveUser() throws Exception \r\n  {\r\n   User user = new User();\r\n   user.setId(3);\r\n   user.setName('User3');\r\n   user.setEmail('user3@gmail.com');\r\n \r\n   ClientRequest request = new ClientRequest(ROOT_URL+'users');\r\n   request.body('applicationxml', user);\r\n   ClientResponse<String> response = request.post(String.class);\r\n \r\n   String statusXML = response.getEntity();\r\n   Assert.assertNotNull(statusXML);\r\n  }\r\n \r\n  @Test\r\n  public void testDeleteUser() throws Exception \r\n  {\r\n   ClientRequest request = new ClientRequest(ROOT_URL+'users2');\r\n   ClientResponse<String> response = request.delete(String.class);\r\n   String statusXML = response.getEntity();\r\n   Assert.assertNotNull(statusXML);\r\n  }\r\n }<\/pre>\n
Step#7: To test the REST service we can use the REST Client Tool. <\/strong>
\nYou can download REST Client Tool at http:\/\/code.google.com\/a\/eclipselabs.org\/p\/restclient-tool\/                    <\/p>\n
Important Things to Keep in mind:<\/strong>
\n1. org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap Listener should be registered before any other listener.                    <\/p>\n
2. You should configure                     resteasy.servlet.mapping.prefix<\/strong> <context-param> if the HttpServletDispatcher servlet url-pattern is anything other than                     \/*<\/strong>                   <\/p>\n
Continue to the second part<\/a> of this tutorial.
\n
\n<\/strong><\/p>\n
Reference: <\/i><\/strong>RESTEasy Tutorial Part-1: Basics<\/a> from our JCG partner<\/a> Siva Reddy at the My Experiments on Technology<\/a> blog.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
RESTEasy is a JAX-RS implementation from JBoss\/RedHat and is in-built in JBoss 6 onwards. Here I am going to show you how to develop a Simple RESTful Web Services application using RESTEasy and JBossAS7.1.1.FINAL.                 Step#1: Configure RESTEasy dependencies using Maven. <project xmlns=’http:maven.apache.orgPOM4.0.0′ xmlns:xsi=’http:www.w3.org2001XMLSchema-instance’ xsi:schemaLocation=’http:maven.apache.orgPOM4.0.0 http:maven.apache.orgmaven-v4_0_0.xsd’> <modelVersion>4.0.0<modelVersion> <groupId>com.sivalabs<groupId> …<\/p>\n","protected":false},"author":15,"featured_media":160,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[135,54],"class_list":["post-1408","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-enterprise-java","tag-jboss-resteasy","tag-restful-web-services"],"yoast_head":"\nRESTEasy Tutorial Part-1: Basics - Java Code Geeks<\/title>\n<meta name=\"description\" content=\"RESTEasy is a JAX-RS implementation from JBoss\/RedHat and is in-built in JBoss 6 onwards. 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