I am trying to create a web service which will taken in JSON response and then query the DB with it to return store details (JSON response).
I intend to use this with a mobile app later on. But during the development I am testing using AJAX calls. I am using a @GET request at the moment. I was able to successfully return a JSON response. I am now facing a problem with passing the JSON Object to the @GET method. On debugging, I see that there is a null value in my input parameter. Can somebody take a look at my code and advise what I am doing wrong?
import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PUT;
import java.util.Iterator;
import org.json.simple.JSONObject;
import org.json.simple.JSONArray;
import org.json.simple.JSONValue;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
/**
* REST Web Service
*
* @author Aj
*
* This service will return the offers valid for the IMSI number passed
*/
@Path("getOffers")
public class GetOffersResource {
@Context
private UriInfo context;
/**
* Creates a new instance of GetOffersResource
*/
public GetOffersResource() {
}
@GET
@Consumes("application/json")
@Produces("application/json")
public String getJson(final String input) {
JSONParser parser = new JSONParser();
String[] response = new String[5];
try {
Object obj = parser.parse(input);
JSONObject jsonObject = (JSONObject) obj;
offerProcess ofc = new offerProcess();
ofc.setLatitude((double) jsonObject.get("latitude"));
ofc.setLongitude((double) jsonObject.get("longitude"));
ofc.setIMSI((long) jsonObject.get("IMSI"));
response = ofc.fetchOffers();
} catch (ParseException e) {
JSONObject ser = new JSONObject();
ser.put("status", "error");
ser.put("reason", "Bad request");
return ser.toJSONString();
}
//TODO return proper representation object
JSONObject ser = new JSONObject();
JSONArray arr = new JSONArray();
arr.add("456TYU");
arr.add("OLED TV");
arr.add("24-JUL-2014");
arr.add("XYZ Enterprises");
arr.add("Gachibowli");
arr.add("9911278366");
ser.put("status", "success");
ser.put("Offers", arr);
System.out.println(ser);
return ser.toJSONString();
}
/**
* PUT method for updating or creating an instance of GetOffersResource
*
* @param content representation for the resource
* @return an HTTP response with content of the updated or created resource.
*/
@PUT
@Consumes("application/json")
public void putJson(String content) {
}
}
Here is the offerProcess class -
public class offerProcess {
private double longitude;
private double latitude;
private long IMSI;
public double getLongitude() {
return longitude;
}
public double getLatitude() {
return latitude;
}
public void setLongitude(double longitude) {
this.longitude = longitude;
}
public void setLatitude(double latitude) {
this.latitude = latitude;
}
public long getIMSI() {
return IMSI;
}
public void setIMSI(long IMSI) {
this.IMSI = IMSI;
}
public String[] fetchOffers(){
String[] response = new String[5];
response[0] = "456TYU";
response[1] = "OLED TV";
response[2] = "24-JUL-2014";
response[3] = "XYZ Enterprises";
response[4] = "Gachibowli";
response[5] = "9980556990";
return response;
}
}
For what it's worth, I am using the JSON.Simple library.
I was able to resolve my problem by doing the same as in the following question - Json parameters are passed as null. Also as suggested, I changed from @GET request to @POST.
I created a new class called jsonFormat which will take in the 3 parameters passed in the @POST request.
Here is my final code which works -
import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PUT;
import javax.ws.rs.POST;
import java.util.Iterator;
import org.json.simple.JSONObject;
import org.json.simple.JSONArray;
import org.json.simple.JSONValue;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
/**
* REST Web Service
*
* @author Aj
*
* This service will return the offers valid for the IMSI number passed
*/
@Path("getOffers")
public class GetOffersResource {
@Context
private UriInfo context;
/**
* Creates a new instance of GetOffersResource
*/
public GetOffersResource() {
}
@POST
@Consumes("application/json")
@Produces("application/json")
public String getJson(jsonFormat jsonObj) {
String[] response = new String[5];
offerProcess ofc = new offerProcess();
try {
ofc.setLatitude(jsonObj.latitude);
ofc.setLongitude(jsonObj.longitude);
ofc.setIMSI(jsonObj.IMSI);
} catch (Exception e) {
JSONObject ser = new JSONObject();
ser.put("status", "error");
ser.put("reason", jsonObj.latitude);
return ser.toJSONString();
}
//TODO return proper representation object
JSONObject ser = new JSONObject();
JSONArray arr = new JSONArray();
arr.add("456TYU");
arr.add("OLED TV");
arr.add("24-JUL-2014");
arr.add("XYZ Enterprises");
arr.add("Gachibowli");
arr.add("9911278366");
ser.put("status", "success");
ser.put("Offers", ofc.getIMSI());
System.out.println(ser);
return ser.toJSONString();
}
/**
* PUT method for updating or creating an instance of GetOffersResource
*
* @param content representation for the resource
* @return an HTTP response with content of the updated or created resource.
*/
@PUT
@Consumes("application/json")
public void putJson(String content) {
}
}
Here is the jsonFormat class I created -
import javax.xml.bind.annotation.XmlRootElement;
/**
*
* @author Aj
* This class forms the format of the JSON request which will be recieved from the App
*/
@XmlRootElement
public class jsonFormat {
public double longitude;
public double latitude;
public long IMSI;
jsonFormat(){}
jsonFormat(double longitude,double latitude, long IMSI){
this.longitude = longitude;
this.latitude = latitude;
this.IMSI = IMSI;
}
}
Lastly, the AJAX code -
<script type="text/javascript">
var url1 = "http://localhost:8080/Offers/webresources/getOffers";
var requestData = {"longitude": "77.681307",
"latitude": "12.8250278",
"IMSI": "404490585029957"};
var jsonObj = JSON.stringify(requestData);
$.ajax({
type: "POST",
contentType: "application/json",
url: url1,
async: true,
data: jsonObj,
success: function(response) {
//var obj = JSON.parse(response);
console.log(response.status);
console.log(response.reason);
console.log(response.Offers);
}
});
</script>
Thank You for all your help and time! I hope this can be useful to somebody.