Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/DischargeTablesServiceImpl.java @ 9726:0a5239a1e46e 3.2.x

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Upgrade to Log4j 2
author Tom Gottfried <tom@intevation.de>
date Wed, 02 Mar 2022 10:26:50 +0100
parents 238fc722f87a
children
rev   line source
5861
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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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.io.IOException;
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12 import java.io.InputStream;
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13 import java.io.OutputStream;
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14 import java.text.DateFormat;
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15 import java.util.Date;
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16 import java.util.Locale;
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17
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18 import javax.servlet.http.HttpServlet;
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19 import javax.servlet.http.HttpServletRequest;
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20 import javax.servlet.http.HttpServletResponse;
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21
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0a5239a1e46e Upgrade to Log4j 2
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22 import org.apache.logging.log4j.Logger;
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23 import org.apache.logging.log4j.LogManager;
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24 import org.w3c.dom.Document;
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25 import org.w3c.dom.Element;
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26
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27 import org.dive4elements.artifacts.common.utils.XMLUtils;
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28 import org.dive4elements.artifacts.httpclient.http.HttpClient;
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29 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
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30 import org.dive4elements.artifacts.httpclient.http.response.StreamResponseHandler;
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31
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32
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33 public class DischargeTablesServiceImpl extends HttpServlet {
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34
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35 private static final Logger log = LogManager
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36 .getLogger(DischargeInfoServiceImpl.class);
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37
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38 private static final DateFormat DATE_FORMAT = DateFormat.getDateInstance(
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39 DateFormat.MEDIUM, Locale.GERMANY);
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40
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41 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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42 log.info("ChartOutputServiceImpl.doGet");
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43
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44 String url = getServletContext().getInitParameter("server-url");
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45 String locale = req.getParameter("locale");
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46
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47 prepareHeader(req, resp);
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48
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49 Document requestDoc = createRequestDoc(req);
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50
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51 HttpClient client = new HttpClientImpl(url, locale);
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52
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53 try {
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54 OutputStream out = resp.getOutputStream();
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55 InputStream stream = (InputStream) client.callService(url,
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56 "dischargetablesoverview", requestDoc,
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57 new StreamResponseHandler());
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58
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59 byte[] b = new byte[4096];
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60 try {
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61 int i;
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62 while ((i = stream.read(b)) >= 0) {
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63 out.write(b, 0, i);
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64 }
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65 }
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66 finally {
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67 stream.close();
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68 }
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69 }
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70 catch (IOException ioe) {
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71 log.error("Error while fetching discharge tables chart!", ioe);
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72 }
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73 }
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74
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75 protected void prepareHeader(HttpServletRequest req,
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76 HttpServletResponse resp) {
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77 resp.setHeader("Content-Type", "image/png");
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78 }
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79
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80 protected Document createRequestDoc(HttpServletRequest req) {
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81 Document request = XMLUtils.newDocument();
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82 XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(request,
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83 null, null);
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84
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85 Element service = creator.create("service");
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86 Element gauge = creator.create("gauge");
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87 Element extent = creator.create("extent");
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88 Element format = creator.create("format");
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89 Element timerange = creator.create("timerange");
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90
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91 creator.addAttr(gauge, "name", extractRequestGauge(req));
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92 creator.addAttr(extent, "width", extractRequestWidth(req));
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93 creator.addAttr(extent, "height", extractRequestHeight(req));
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94 creator.addAttr(format, "type", extractRequestFormat(req));
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95 creator.addAttr(timerange, "lower", extractRequestLowerTime(req));
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96 creator.addAttr(timerange, "upper", extractRequestUpperTime(req));
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97
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98 request.appendChild(service);
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99 service.appendChild(gauge);
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100 service.appendChild(extent);
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101 service.appendChild(format);
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102 service.appendChild(timerange);
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103
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104 return request;
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105 }
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106
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107 protected String extractRequestGauge(HttpServletRequest req) {
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108 return req.getParameter("gauge");
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109 }
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110
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111 protected String extractRequestWidth(HttpServletRequest req) {
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112 return req.getParameter("width");
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113 }
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114
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115 protected String extractRequestHeight(HttpServletRequest req) {
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116 return req.getParameter("height");
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117 }
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118
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119 protected String extractRequestFormat(HttpServletRequest req) {
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120 return req.getParameter("format");
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121 }
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122
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123 protected String extractRequestLowerTime(HttpServletRequest req) {
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124 String lowerStr = req.getParameter("lower");
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125 try {
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126 long lowerMillis = Long.parseLong(lowerStr);
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127 Date lower = new Date(lowerMillis);
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128
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129 return DATE_FORMAT.format(lower);
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130 }
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131 catch (NumberFormatException nfe) {
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132 log.warn("Cannot parse time millies.", nfe);
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133 }
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134
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135 return null;
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136 }
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137
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138 protected String extractRequestUpperTime(HttpServletRequest req) {
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139 String upperStr = req.getParameter("upper");
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140 try {
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141 long upperMillis = Long.parseLong(upperStr);
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142 Date upper = new Date(upperMillis);
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143
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144 return DATE_FORMAT.format(upper);
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145 }
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146 catch (NumberFormatException nfe) {
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147 log.warn("Cannot parse time millies.", nfe);
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148 }
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149
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150 return null;
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151 }
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152 }
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