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POGWT and REST (jax-rs)
 

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  1. POGWT and REST (jax-rs)
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    <p>I have a project where you can ask for ressources that are served by jax-rs in the json format. Everything works properly in the browser when I query the rest URL the json appears. </p> <p>Now I want my GWT project to request those ressources and process them and show them in my interface. The simplest way I found to do so is using a request builder and an overlay. Code is lower. The problem is, it seems when the code is running it never goes into the actual RequestCallback(). The status string is never changed. I thought it could be a SOP so I added the but still doesnt work. Any ideal?</p> <pre><code>package com.workoutcell.client; //import com.google.gwt.core.client.JavaScriptObject; import com.google.gwt.core.client.JsArray; import com.google.gwt.http.client.*; import com.google.gwt.http.client.Request; import com.google.gwt.http.client.RequestBuilder; import com.google.gwt.http.client.RequestCallback; import com.google.gwt.http.client.RequestException; import com.google.gwt.http.client.Response; /** * * @author */ public class RestToInfoSession{ String queryReturn = null; JsArray&lt;InfoJSO&gt; arrayOfInfo = null; String host = "http://localhost:8080/mysite"; String restModule = "/calendar/getinfo"; String id = null; String year = null; String month = null; String status = "Not Initialized"; public RestToInfoSession(String id, String year, String month){ this.id =id; this.year = year; this.month = month; String url = host + restModule + "/"+this.id + "/"+this.year + "/"+this.month; RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url); try { status = "Initialized at Url " + builder.getUrl(); Request request = builder.sendRequest(null, new RequestCallback() { public void onError(Request request, Throwable exception) { // Couldn't connect to server (could be timeout, SOP violation, etc.) status = "Error on connecting to Server"; } public void onResponseReceived(Request request, Response response) { if (200 == response.getStatusCode()) { // arrayOfInfo = jsonToJsArray(response.getText()); status = "JSON has been Fetched. Result is:" + response.getText(); } else if(0 == response.getStatusCode()) { status = "Error is 0"; } else { status = "Error in JSON Request:" + response.getStatusCode(); //response.getStatusText(); } } }); } catch (RequestException ex) { status = "Error in Request Builder Startup"; } } //get an jso object in array private final native JsArray&lt;InfoJSO&gt; jsonToJsArray(String json) /*-{ return eval(json); }-*/; public JsArray&lt;InfoJSO&gt; getInfoArray (){ return arrayOfInfo; } } </code></pre> <p>UPDATE: My problem is the same as <a href="https://stackoverflow.com/questions/3059527/referring-to-a-non-final-variable-data-inside-an-inner-class">Referring to a non-final variable data inside an inner class</a> .I wasnt aware of asynchronous calls working mechanism. I still dont know how to pass my response.getText() to update a label that isnt part of my RestToInfoSession class....any ideas?</p>
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    1. COIf I use the google chrome developper tools, I can see that my javascript gets a 200 code, and that result received is my json string. But the result isnt displayed in the browser app in the label. This is what ive put in my entrypoint: Label lab3 = new Label(); lab3.setText(new RestToInfoSession("2", "2010", "12").getJsonText());
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