001 /* 002 * Sonar, open source software quality management tool. 003 * Copyright (C) 2009 SonarSource SA 004 * mailto:contact AT sonarsource DOT com 005 * 006 * Sonar is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU Lesser General Public 008 * License as published by the Free Software Foundation; either 009 * version 3 of the License, or (at your option) any later version. 010 * 011 * Sonar is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * You should have received a copy of the GNU Lesser General Public 017 * License along with Sonar; if not, write to the Free Software 018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02 019 */ 020 package org.sonar.api.web.gwt.client.webservices; 021 022 import java.util.ArrayList; 023 import java.util.List; 024 025 import com.google.gwt.core.client.JavaScriptObject; 026 import com.google.gwt.user.client.Timer; 027 028 public class SequentialQueries extends Query<VoidResponse> { 029 030 private List<AjaxQuery<?>> queries = new ArrayList<AjaxQuery<?>>(); 031 private int sleepTimeBetweenCbChecks; 032 033 private SequentialQueries(int sleepTimeBetweenCbChecks) { 034 this.sleepTimeBetweenCbChecks = sleepTimeBetweenCbChecks; 035 } 036 037 public static SequentialQueries get() { 038 return new SequentialQueries(50); 039 } 040 041 public static SequentialQueries get(int sleepTimeBetweenCbChecks) { 042 return new SequentialQueries(sleepTimeBetweenCbChecks); 043 } 044 045 public <R extends ResponsePOJO> SequentialQueries add(Query<R> query, QueryCallBack<R> callback) { 046 queries.add(new AjaxQuery<R>(query, callback)); 047 return this; 048 } 049 050 @Override 051 public void execute(final QueryCallBack<VoidResponse> callback) { 052 for (AjaxQuery<?> query : queries) { 053 query.execute(); 054 } 055 Timer queriesMonitor = new Timer() { 056 @Override 057 public void run() { 058 boolean queriesExecuted = true; 059 for (AjaxQuery<?> query : queries) { 060 if (!query.isCompleted()) { 061 queriesExecuted = false; 062 break; 063 } 064 } 065 if (queriesExecuted) { 066 callback.onResponse(new VoidResponse(), null); 067 cancel(); 068 } 069 } 070 }; 071 queriesMonitor.scheduleRepeating(sleepTimeBetweenCbChecks); 072 } 073 074 private class AjaxQuery<R extends ResponsePOJO> { 075 private Query<R> query; 076 private QueryCallBack<R> callback; 077 078 private boolean completed = false; 079 080 public AjaxQuery(Query<R> query, QueryCallBack<R> callback) { 081 super(); 082 this.query = query; 083 this.callback = callback; 084 } 085 086 private void execute() { 087 QueryCallBack<R> proxy = new QueryCallBack<R>() { 088 public void onError(int errorCode, String errorMessage) { 089 callback.onError(errorCode, errorMessage); 090 completed = true; 091 } 092 093 public void onResponse(R response, JavaScriptObject jsonRawResponse) { 094 callback.onResponse(response, jsonRawResponse); 095 completed = true; 096 } 097 098 public void onTimeout() { 099 callback.onTimeout(); 100 completed = true; 101 } 102 }; 103 query.execute(proxy); 104 } 105 106 public boolean isCompleted() { 107 return completed; 108 } 109 110 } 111 112 }