Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/DischargeInfoServiceImpl.java @ 8870:c26fb37899ca

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Introduced groups for modules. Modules marked with the same group-id, will be put together in the ui. Also using now the localization info from the server instead of localizing the modules again on the client side.
author gernotbelger
date Wed, 07 Feb 2018 11:59:13 +0100
parents 238fc722f87a
children 0a5239a1e46e
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.server;
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10
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11 import java.util.ArrayList;
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12 import java.util.List;
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13
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14 import org.w3c.dom.Document;
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15 import org.w3c.dom.Element;
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16 import org.w3c.dom.NodeList;
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17
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18 import org.apache.log4j.Logger;
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19
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20 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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21
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22 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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23 import org.dive4elements.artifacts.common.utils.XMLUtils;
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24
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25 import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
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26 import org.dive4elements.artifacts.httpclient.http.HttpClient;
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27 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
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28
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29 import org.dive4elements.river.client.shared.exceptions.ServerException;
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30 import org.dive4elements.river.client.client.services.DischargeInfoService;
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31 import org.dive4elements.river.client.shared.model.DischargeInfoObject;
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32 import org.dive4elements.river.client.shared.model.DischargeInfoObjectImpl;
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33
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34
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35 /**
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36 * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
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37 */
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38 public class DischargeInfoServiceImpl
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39 extends RemoteServiceServlet
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40 implements DischargeInfoService
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41 {
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42 private static final Logger log =
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43 Logger.getLogger(DischargeInfoServiceImpl.class);
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44
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45 public static final String ERROR_NO_DISCHARGEINFO_FOUND =
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46 "error_no_dischargeinfo_found";
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47
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48 public static final String XPATH_DISTANCES = "art:discharges/art:discharge";
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49
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50
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51 @Override
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52 public DischargeInfoObject[] getDischargeInfo(
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53 String locale,
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54 long gauge,
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55 String river)
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56 throws ServerException
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57 {
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58 log.info("DichargeInfoServiceImpl.getDischargeInfo");
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59
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60 String url = getServletContext().getInitParameter("server-url");
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61
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62 Document doc = XMLUtils.newDocument();
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63
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64 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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65 doc,
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66 ArtifactNamespaceContext.NAMESPACE_URI,
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67 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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68
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69 Element gaugeEl = ec.create("gauge");
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70 gaugeEl.setTextContent(String.valueOf(gauge));
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71
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72 Element riverEl = ec.create("river");
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73 riverEl.setTextContent(river);
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74
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75 gaugeEl.appendChild(riverEl);
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76 doc.appendChild(gaugeEl);
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77
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78 HttpClient client = new HttpClientImpl(url, locale);
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79
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80 try {
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81 Document result = client.callService(url, "dischargeinfo", doc);
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82
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83 log.debug("Extract discharge info objects now.");
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84 DischargeInfoObject[] objects = extractDischargeInfoObjects(result);
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85
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86 if (objects != null && objects.length > 0) {
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87 return objects;
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88 }
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89 }
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90 catch (ConnectionException ce) {
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91 log.error(ce, ce);
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92 }
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93
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94 throw new ServerException(ERROR_NO_DISCHARGEINFO_FOUND);
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95 }
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96
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97 protected DischargeInfoObject[] extractDischargeInfoObjects(
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98 Document result
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99 )
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100 throws ServerException {
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101 NodeList list = result.getElementsByTagName("discharge");
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102
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103 if (list == null || list.getLength() == 0) {
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104 log.warn("No discharge info found.");
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105 throw new ServerException(ERROR_NO_DISCHARGEINFO_FOUND);
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106 }
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107
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108 int num = list.getLength();
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109 log.debug("Response contains " + num + " objects.");
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110
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111 List<DischargeInfoObject> objects =
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112 new ArrayList<DischargeInfoObject>(num);
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113
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114 for (int i = 0; i < num; i++) {
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115 DischargeInfoObject obj = buildDischargeInfoObject(
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116 (Element)list.item(i));
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117
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118 if (obj != null) {
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119 objects.add(obj);
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120 }
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121 }
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122
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123 log.debug("Retrieved " + objects.size() + " discharges.");
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124
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125 return (DischargeInfoObject[])
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126 objects.toArray(new DischargeInfoObject[num]);
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127
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128 }
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129
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130 protected DischargeInfoObject buildDischargeInfoObject(Element node) {
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131
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132 String desc = node.getAttribute("description").trim();
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133 String start = node.getAttribute("start").trim();
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134 String end = node.getAttribute("end").trim();
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135 String bfgId = node.getAttribute("bfg-id").trim();
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136
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137 if (start.length() > 0 && end.length() > 0) {
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138 try {
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139 Integer startYear = Integer.valueOf(start);
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140 Integer endYear = Integer.valueOf(end);
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141 return new DischargeInfoObjectImpl(
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142 desc, startYear, endYear, bfgId);
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143 }
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144 catch (NumberFormatException nfe) {
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145 log.warn(nfe.getLocalizedMessage());
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146 }
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147 }
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148
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149 log.warn("Invalid distance info object found.");
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150
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151 return null;
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152 }
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153 }
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154 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org