2 * Copyright 2011-2013 GRNET S.A. All rights reserved.
4 * Redistribution and use in source and binary forms, with or
5 * without modification, are permitted provided that the following
8 * 1. Redistributions of source code must retain the above
9 * copyright notice, this list of conditions and the following
12 * 2. Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
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15 * provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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36 package gr.grnet.pithos.web.client.rest;
38 import gr.grnet.pithos.web.client.Const;
39 import gr.grnet.pithos.web.client.Helpers;
40 import gr.grnet.pithos.web.client.Pithos;
41 import gr.grnet.pithos.web.client.Resource;
43 import java.util.HashMap;
46 import com.google.gwt.core.client.GWT;
47 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
48 import com.google.gwt.http.client.Request;
49 import com.google.gwt.http.client.RequestBuilder;
50 import com.google.gwt.http.client.RequestException;
51 import com.google.gwt.http.client.Response;
53 public abstract class GetRequest<T extends Resource> implements ScheduledCommand {
55 protected static final int MAX_RETRIES = 3;
57 protected int retries = 0;
59 protected Class<T> resourceClass;
63 protected String owner;
71 private Map<String, String> headers = new HashMap<String, String>();
73 public abstract void onSuccess(T _result);
75 public abstract void onError(Throwable t);
77 public GetRequest(Class<T> resourceClass, String api, String owner, String path, int okCode, T result) {
78 this.resourceClass = resourceClass;
86 public GetRequest(Class<T> resourceClass, String api, String owner, String path) {
87 this(resourceClass, api, owner, path, -1, null);
88 Pithos.LOG("GetRequest() resourceClass = ", resourceClass.getName(), ", api=", api, ", owner=", owner, ", path=", path);
91 public GetRequest(Class<T> resourceClass, String api, String owner, String path, T result) {
92 this(resourceClass, api, owner, path, -1, result);
96 public void execute() {
97 if (path.contains(Const.QUESTION_MARK)) {
98 path += "&t=" + System.currentTimeMillis();
101 path += "?t=" + System.currentTimeMillis();
104 Pithos.LOG("GET ", api + owner + path);
106 RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, api + owner + path);
107 Helpers.setHeaders(builder, headers);
110 builder.sendRequest("", new RestRequestCallback<T>(api + owner + path, okCode) {
112 public void onSuccess(T object) {
113 GetRequest.this.onSuccess(object);
117 public T deserialize(Response response) {
118 return Resource.createFromResponse(resourceClass, owner, response, result);
122 public void onError(Request request, Throwable throwable) {
123 if (throwable instanceof RestException) {
124 if (((RestException) throwable).getHttpStatusCode() == 304 && result != null){
125 Pithos.LOG("Using cache: ", result.toString());
130 GetRequest.this.onError(throwable);
134 public void onUnauthorized(Response response) {
135 GetRequest.this.onUnauthorized(response);
140 catch (RequestException e) {
141 Pithos.LOG("Error in GetRequest", e);
145 protected abstract void onUnauthorized(Response response);
147 public void setHeader(String header, String value) {
148 headers.put(header, value);