Posting a JSON Request into RESTful Interface

In the earlier article, we have seen how to host a REST interface accepting JSON message as an input and sending JSON message as a response.

Here, we will post a JSON message into the same rest interface that we have hosted earlier and accept a JSON message in the response.

import javax.ws.rs.core.MediaType;

import javax.ws.rs.core.UriBuilder;

import org.codehaus.jettison.json.JSONObject;

import com.sun.jersey.api.client.Client;

import com.sun.jersey.api.client.WebResource;

import com.sun.jersey.api.client.config.ClientConfig;

import com.sun.jersey.api.client.config.DefaultClientConfig;

import com.sun.jersey.api.client.filter.HTTPBasicAuthFilter;

public class TestSampleRestInterface {

      public static void main(String[] args) {

            ClientConfig config = new DefaultClientConfig();

            Client client = Client.create(config);

//if timeouts needs to be configured then please add the following lines

           //Set the connection time out (milliseconds)

          client.setConnectTimeout(5000);

           //Set the read time out (in milliseconds)

          client.setReadTimeout(5000);

               /*if host has restricted access while connecting to the server by       weblogic basic authentication. Please add the following lines with proper credentials*/

         client.addFilter(new HTTPBasicAuthFilter(“username”,”password”);

            WebResource service = client.resource(getBaseURI());

                  JSONObject object = null;

            try {

                  object = new JSONObject();

                  object.put("firstname","Snehanshu");

                  object.put("lastname","Chatterjee");

                  object.put("company","TM");

                  object.put("grade","TA");

                  object.put("post","G1");     

                  System.out.println(object);

            } catch (Exception e) {

                  e.printStackTrace();

            }

            long startTime = System.currentTimeMillis();

                  System.out.println("Response :"

                              + service.accept(

                                          MediaType.APPLICATION_JSON).post(JSONObject.class,

                                          object));  

            long endTime = System.currentTimeMillis();

            System.out.println(startTime-endTime);

      }

      private static URI getBaseURI() {

            return UriBuilder.fromUri(

                        "http://localhost:7001/samplerest/sampleRequest")

                        .build();

      }

}

Output:

{"EmployeeHeader":{"errorCode":"0","errorText":"Employee Creation Successful"}}

For any calls to rest interfaces which accept get request with variable inputs, the following line of codes need to be added.

//to accept a response on top of any get request

responseString = service.queryParams(queryParams).accept(MediaType.APPLICATION_XML).get(String.class);

//to add the variable inputs with ?_id=”anyvalue”

MultivaluedMap&lt:String, String> queryParams = new MultivaluedMapImpl();

queryParams.add(id, ID);

While connecting through proxy, please add the following lines before connecting to remote server

System.getProperties().setProperty(“http.proxySet”,”true”);

System.getProperties().setProperty(“http.proxyHost”,”111.222.111.222”);

System.getProperties().setProperty(“http.proxyPort”,”8080”);

Hope you find it useful.