Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/DischargeTablesServiceImpl.java @ 5861:172338b1407f

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GWT client: Added copyright header.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:30:15 +0200
parents 5aa05a7a34b7
children ea9eef426962
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
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
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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
172338b1407f GWT client: Added copyright header.
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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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22 import org.apache.log4j.Logger;
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23 import org.w3c.dom.Document;
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24 import org.w3c.dom.Element;
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25
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26 import org.dive4elements.artifacts.common.utils.XMLUtils;
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27 import org.dive4elements.artifacts.httpclient.http.HttpClient;
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28 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
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29 import org.dive4elements.artifacts.httpclient.http.response.StreamResponseHandler;
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30
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31
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32 public class DischargeTablesServiceImpl extends HttpServlet {
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33
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34 private static final Logger logger = Logger
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35 .getLogger(DischargeInfoServiceImpl.class);
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36
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37 private static final DateFormat DATE_FORMAT = DateFormat.getDateInstance(
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38 DateFormat.MEDIUM, Locale.GERMANY);
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39
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40 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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41 logger.info("ChartOutputServiceImpl.doGet");
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42
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43 String url = getServletContext().getInitParameter("server-url");
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44 String locale = req.getParameter("locale");
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45
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46 prepareHeader(req, resp);
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47
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48 Document requestDoc = createRequestDoc(req);
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49
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50 HttpClient client = new HttpClientImpl(url, locale);
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51
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52 try {
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53 OutputStream out = resp.getOutputStream();
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54 InputStream stream = (InputStream) client.callService(url,
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55 "dischargetablesoverview", requestDoc,
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56 new StreamResponseHandler());
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57
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58 byte[] b = new byte[4096];
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59 try {
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60 int i;
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61 while ((i = stream.read(b)) >= 0) {
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62 out.write(b, 0, i);
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63 }
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64 }
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65 finally {
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66 stream.close();
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67 }
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68 }
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69 catch (IOException ioe) {
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70 logger.error("Error while fetching discharge tables chart!", ioe);
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71 }
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72 }
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73
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74 protected void prepareHeader(HttpServletRequest req,
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75 HttpServletResponse resp) {
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76 resp.setHeader("Content-Type", "image/png");
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77 }
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78
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79 protected Document createRequestDoc(HttpServletRequest req) {
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80 Document request = XMLUtils.newDocument();
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81 XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(request,
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82 null, null);
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83
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84 Element service = creator.create("service");
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85 Element gauge = creator.create("gauge");
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86 Element extent = creator.create("extent");
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87 Element format = creator.create("format");
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88 Element timerange = creator.create("timerange");
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89
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90 creator.addAttr(gauge, "name", extractRequestGauge(req));
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91 creator.addAttr(extent, "width", extractRequestWidth(req));
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92 creator.addAttr(extent, "height", extractRequestHeight(req));
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93 creator.addAttr(format, "type", extractRequestFormat(req));
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94 creator.addAttr(timerange, "lower", extractRequestLowerTime(req));
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95 creator.addAttr(timerange, "upper", extractRequestUpperTime(req));
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96
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97 request.appendChild(service);
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98 service.appendChild(gauge);
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99 service.appendChild(extent);
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100 service.appendChild(format);
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101 service.appendChild(timerange);
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102
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103 return request;
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104 }
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105
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106 protected String extractRequestGauge(HttpServletRequest req) {
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107 return req.getParameter("gauge");
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108 }
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109
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110 protected String extractRequestWidth(HttpServletRequest req) {
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111 return req.getParameter("width");
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112 }
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113
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114 protected String extractRequestHeight(HttpServletRequest req) {
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115 return req.getParameter("height");
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116 }
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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117
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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118 protected String extractRequestFormat(HttpServletRequest req) {
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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119 return req.getParameter("format");
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120 }
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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121
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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122 protected String extractRequestLowerTime(HttpServletRequest req) {
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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123 String lowerStr = req.getParameter("lower");
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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124 try {
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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125 long lowerMillis = Long.parseLong(lowerStr);
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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126 Date lower = new Date(lowerMillis);
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127
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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128 return DATE_FORMAT.format(lower);
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129 }
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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130 catch (NumberFormatException nfe) {
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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131 logger.warn("Cannot parse time millies.", nfe);
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132 }
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133
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134 return null;
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135 }
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136
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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137 protected String extractRequestUpperTime(HttpServletRequest req) {
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138 String upperStr = req.getParameter("upper");
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139 try {
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140 long upperMillis = Long.parseLong(upperStr);
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141 Date upper = new Date(upperMillis);
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142
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143 return DATE_FORMAT.format(upper);
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144 }
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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145 catch (NumberFormatException nfe) {
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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146 logger.warn("Cannot parse time millies.", nfe);
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147 }
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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parents:
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148
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
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149 return null;
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150 }
6ae99d996f79 flys/issue903: Display the discharge tables of the selected gauge as chart in historical discharge calculation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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151 }
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