Restlet implementing post with json receive and response - json

Question

First, what i wanted to know is what i am doing is the right way to do it.
I have a scenario where i have will receive a json request and i have to update the database with that, once the db is updated i have to respond back with the json acknowledgment.
What i have done so far is create the class extending application as follows:
#Override
public Restlet createRoot() {
// Create a router Restlet that routes each call to a
// new instance of ScanRequestResource.
Router router = new Router(getContext());
// Defines only one route
router.attach("/request", RequestResource.class);
return router;
}
My resource class is extending the ServerResource and i have the following method in my resource class
#Post("json")
public Representation post() throws ResourceException {
try {
Representation entity = getRequestEntity();
JsonRepresentation represent = new JsonRepresentation(entity);
JSONObject jsonobject = represent.toJsonObject();
JSONObject json = jsonobject.getJSONObject("request");
getResponse().setStatus(Status.SUCCESS_ACCEPTED);
StringBuffer sb = new StringBuffer();
ScanRequestAck ack = new ScanRequestAck();
ack.statusURL = "http://localhost:8080/status/2713";
Representation rep = new JsonRepresentation(ack.asJSON());
return rep;
} catch (Exception e) {
getResponse().setStatus(Status.SERVER_ERROR_INTERNAL);
}
My first concern is the object i receive in the entity is inputrepresentation so when i fetch the jsonobject from the jsonrepresentation created i always get empty/null object.
I have tried passing the json request with the following code as well as the client attached
function submitjson(){
alert("Alert 1");
$.ajax({
type: "POST",
url: "http://localhost:8080/thoughtclicksWeb/request",
contentType: "application/json; charset=utf-8",
data: "{request{id:1, request-url:http://thoughtclicks.com/status}}",
dataType: "json",
success: function(msg){
//alert("testing alert");
alert(msg);
}
});
};
Client used to call
ClientResource requestResource = new ClientResource("http://localhost:8080/thoughtclicksWeb/request");
Representation rep = new JsonRepresentation(new JSONObject(jsonstring));
rep.setMediaType(MediaType.APPLICATION_JSON);
Representation reply = requestResource.post(rep);
Any help or clues on this is hight appreciated ?
Thanks,
Rahul

Answer 1

Using just 1 JAR jse-x.y.z/lib/org.restlet.jar, you could construct JSON by hand at the client side for simple requests:
ClientResource res = new ClientResource("http://localhost:9191/something/other");
StringRepresentation s = new StringRepresentation("" +
"{\n" +
"\t\"name\" : \"bank1\"\n" +
"}");
res.post(s).write(System.out);
At the server side, using just 2 JARs - gson-x.y.z.jar and jse-x.y.z/lib/org.restlet.jar:
public class BankResource extends ServerResource {
#Get("json")
public String listBanks() {
JsonArray banksArray = new JsonArray();
for (String s : names) {
banksArray.add(new JsonPrimitive(s));
}
JsonObject j = new JsonObject();
j.add("banks", banksArray);
return j.toString();
}
#Post
public Representation createBank(Representation r) throws IOException {
String s = r.getText();
JsonObject j = new JsonParser().parse(s).getAsJsonObject();
JsonElement name = j.get("name");
.. (more) .. ..
//Send list on creation.
return new StringRepresentation(listBanks(), MediaType.TEXT_PLAIN);
}
}

Answer 2

When I use the following JSON as the request, it works:
{"request": {"id": "1", "request-url": "http://thoughtclicks.com/status"}}
Notice the double quotes and additional colon that aren't in your sample.