Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/WQInfoServiceImpl.java @ 5200:42bb6ff78d1b 2.9.11

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Directly set the connectionInitSqls on the datasource Somehow the factory fails to set the connectionInitSqls if we add it to the dbcpProperties. So we now set it directly
author Andre Heinecke <aheinecke@intevation.de>
date Fri, 08 Mar 2013 11:48:33 +0100
parents e70ff0a600a3
children 42692d6868e6
rev   line source
245
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1 package de.intevation.flys.client.server;
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2
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3 import java.util.ArrayList;
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4 import java.util.List;
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5
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6 import javax.xml.xpath.XPathConstants;
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7
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8 import org.w3c.dom.Document;
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9 import org.w3c.dom.Element;
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10 import org.w3c.dom.Node;
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11 import org.w3c.dom.NodeList;
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12
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13 import org.apache.log4j.Logger;
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15 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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16
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17 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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18 import de.intevation.artifacts.common.utils.XMLUtils;
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19
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20 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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21 import de.intevation.artifacts.httpclient.http.HttpClient;
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22 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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23
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24 import de.intevation.flys.client.shared.exceptions.ServerException;
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25 import de.intevation.flys.client.client.services.WQInfoService;
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26 import de.intevation.flys.client.shared.model.WQInfoObject;
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27 import de.intevation.flys.client.shared.model.WQInfoObjectImpl;
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28
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29
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30 /**
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31 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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32 */
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33 public class WQInfoServiceImpl
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34 extends RemoteServiceServlet
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35 implements WQInfoService
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36 {
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37 private static final Logger logger =
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38 Logger.getLogger(WQInfoServiceImpl.class);
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39
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40 public static final String ERROR_NO_WQINFO_FOUND =
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41 "error_no_wqinfo_found";
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42
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43 public static final String XPATH_WQS = "art:service/art:mainvalues/art:mainvalue";
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44
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45
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46 public WQInfoObject[] getWQInfo(
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47 String locale,
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48 String river,
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49 double from,
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50 double to)
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51 throws ServerException
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52 {
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53 logger.info("WQInfoServiceImpl.getWQInfo");
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54
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55 String url = getServletContext().getInitParameter("server-url");
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56
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57 Document doc = XMLUtils.newDocument();
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58
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59 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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60 doc,
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61 ArtifactNamespaceContext.NAMESPACE_URI,
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62 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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63
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64 Element mainvalues = ec.create("mainvalues");
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65 Element riverEl = ec.create("river");
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66 Element startEl = ec.create("start");
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67 Element endEl = ec.create("end");
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68
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69 riverEl.setTextContent(river);
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70 startEl.setTextContent(Double.valueOf(from).toString());
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71 endEl.setTextContent(Double.valueOf(to).toString());
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72
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73 mainvalues.appendChild(riverEl);
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74 mainvalues.appendChild(startEl);
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75 mainvalues.appendChild(endEl);
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76
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77 doc.appendChild(mainvalues);
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78
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79 HttpClient client = new HttpClientImpl(url, locale);
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80
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81 try {
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82 Document result = client.callService(url, "mainvalues", doc);
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83
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84 logger.debug("Extract wq info objects now.");
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85 WQInfoObject[] objects = extractWQInfoObjects(result);
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86
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87 if (objects != null && objects.length > 0) {
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88 return objects;
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89 }
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90 }
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91 catch (ConnectionException ce) {
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92 logger.error(ce, ce);
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93 }
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94
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95 throw new ServerException(ERROR_NO_WQINFO_FOUND);
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96 }
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97
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98
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99 /**
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100 * Extracts all wq info objects from <i>result</i> document.
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101 *
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102 * @param result The document retrieved by the server.
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103 *
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104 * @return a list of WQInfoObjects.
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105 */
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106 protected WQInfoObject[] extractWQInfoObjects(Document result)
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107 throws ServerException
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108 {
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109 NodeList list = (NodeList) XMLUtils.xpath(
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110 result,
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111 XPATH_WQS,
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112 XPathConstants.NODESET,
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113 ArtifactNamespaceContext.INSTANCE);
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114
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115 if (list == null || list.getLength() == 0) {
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116 logger.warn("No wq info found.");
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117
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118 throw new ServerException(ERROR_NO_WQINFO_FOUND);
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119 }
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120
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121 int num = list.getLength();
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122 logger.debug("Response contains " + num + " objects.");
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123
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124 List<WQInfoObject> objects =
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125 new ArrayList<WQInfoObject>(num);
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126
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127 for (int i = 0; i < num; i++) {
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128 WQInfoObject obj = buildWQInfoObject(list.item(i));
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129
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130 if (obj != null) {
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131 objects.add(obj);
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132 }
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133 }
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134
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135 logger.debug("Retrieved " + objects.size() + " wq values");
245
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136
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137 return (WQInfoObject[])
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138 objects.toArray(new WQInfoObject[num]);
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139 }
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140
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141
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142 /**
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143 * Extracts information for a single wq info object and intializes an
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144 * WQInfoObject with them.
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145 *
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146 * @param node The node that contains the information.
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147 *
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148 * @return a valid WQInfoObject.
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149 */
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150 protected WQInfoObject buildWQInfoObject(Node node) {
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151 String name = XMLUtils.xpathString(
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152 node, "@name", ArtifactNamespaceContext.INSTANCE);
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153
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154 String type = XMLUtils.xpathString(
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155 node, "@type", ArtifactNamespaceContext.INSTANCE);
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156
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157 String value = XMLUtils.xpathString(
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158 node, "@value", ArtifactNamespaceContext.INSTANCE);
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159
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160
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161 if (name != null && type != null) {
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162 try {
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163 return new WQInfoObjectImpl(
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164 name,
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165 type,
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166 new Double(value));
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167 }
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168 catch (NumberFormatException nfe) {
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169 logger.warn(nfe.getLocalizedMessage());
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170 }
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171 }
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172
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173 logger.warn("Invalid wq info object found.");
245
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174
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175 return null;
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176 }
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177 }
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178 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org