Lets extend the Jersey endpoint (TOTD# 56) and client (TOTD# 57) such that it can accept a POST request and then invoke it.

1. Add a new method to "MyResource.java" from TOTD# 56 as:
   
   

   @POST     @Consumes("application/json")     @Produces("application/json")     public Greeting postIt(Greeting greeting) {         System.out.println("In POST: " + greeting.greeting);         return greeting;     }

   
   The first line indicates that the Java method will process HTTP POST requests. The second and third line shows that the method consumes and produces JSON data format.
   
2. Add a new method to "AppTest.java" from TOTD# 57 as:
   
   

   public void testPost() {         Greeting result = createResource().                 type("application/json").                 post(Greeting.class, new Greeting("yo!"));         assertTrue(result.greeting.equals("yo!"));     }

   
   The main difference from the "testApp()" method is specifying the MIME type of the generated outbound request as "application/json".
   
3. Running the test as "mvn test" shows the following output:
   
   

   Running org.glassfish.samples.AppTest 1 * Out-bound request 1 > GET http://localhost:8080/helloworld-webapp/webresources/myresource 1 > 1 < 200 1 < X-Powered-By: Servlet/2.5 1 < Transfer-Encoding: chunked 1 < Content-Type: text/plain 1 < Server: GlassFish/v3 1 < Date: Tue, 25 Nov 2008 20:19:34 GMT 1 < <?xml version="1.0" encoding="UTF-8" standalone="yes"?><greeting><greeting>Hi there!</greeting></greeting> 1 * In-bound response 1 * Out-bound request 1 > POST http://localhost:8080/helloworld-webapp/webresources/myresource 1 > Content-Type: application/json 1 > {"greeting":"yo!"} 1 < 200 1 < X-Powered-By: Servlet/2.5 1 < Transfer-Encoding: chunked 1 < Content-Type: application/json 1 < Server: GlassFish/v3 1 < Date: Tue, 25 Nov 2008 20:19:34 GMT 1 < {"greeting":"yo!"} 1 * In-bound response Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.191 sec

   
   The output shows request/response messages when both the tests are run together. Here are some highlights:
1. "GET" and "POST" methods are clearly highlighted.
2. The two "Content-Type" headers with value "text/plain" and "application/json" are output from two tests. The output from POST method has two Content-Type headers, one for outbound request and another one for inbound response.
3. The body content of POST method is using JSON format.
   

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