Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/ChartOutputServiceImpl.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
diff changeset
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
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
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3 *
172338b1407f GWT client: Added copyright header.
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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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11 import java.io.OutputStream;
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12 import java.io.IOException;
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13 import java.util.HashMap;
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14 import java.util.Map;
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15
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16 import org.w3c.dom.Document;
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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 javax.servlet.http.HttpServlet;
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21 import javax.servlet.http.HttpServletRequest;
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22 import javax.servlet.http.HttpServletResponse;
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23
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24 import org.dive4elements.artifacts.common.utils.ClientProtocolUtils;
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25
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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
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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30 /**
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31 * This service is used to request a chart from the artifact server. The
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32 * response is directed directly to the output stream, so the image that is
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33 * retrieved is displayed in the UI afterwards.
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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34 *
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35 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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36 */
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37 public class ChartOutputServiceImpl
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38 extends HttpServlet
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39 {
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40 private static final Logger logger =
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41 Logger.getLogger(ChartOutputServiceImpl.class);
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42
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43
78
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44 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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45 logger.info("ChartOutputServiceImpl.doGet");
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46
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47 try {
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48 OutputStream out = resp.getOutputStream();
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49
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50 String url = getServletContext().getInitParameter("server-url");
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51
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52 String uuid = req.getParameter("uuid");
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53 String type = req.getParameter("type");
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54 String locale = req.getParameter("locale");
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55
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56 prepareHeader(req, resp);
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57
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58 Document request = ClientProtocolUtils.newOutCollectionDocument(
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59 uuid, type, type,
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60 ChartServiceHelper.getChartAttributes(prepareChartAttributes(req)));
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61
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62 HttpClient client = new HttpClientImpl(url, locale);
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63 client.collectionOut(request, uuid, "chart", out);
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64
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65 out.close();
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66 out.flush();
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67 }
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68 catch (IOException ioe) {
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69 logger.error(ioe, ioe);
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70 }
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71 catch (Exception e) {
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72 logger.error(e, e);
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73 }
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74 }
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75
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76
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77 protected Map<String, String> prepareChartAttributes(HttpServletRequest req) {
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78 Map<String, String> attr = new HashMap<String, String>();
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79
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80 Map params = req.getParameterMap();
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81
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82 attr.put("width", req.getParameter("width"));
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83 attr.put("height", req.getParameter("height"));
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84 attr.put("minx", req.getParameter("minx"));
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85 attr.put("maxx", req.getParameter("maxx"));
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86 attr.put("miny", req.getParameter("miny"));
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87 attr.put("maxy", req.getParameter("maxy"));
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88 attr.put("format", req.getParameter("format"));
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89 attr.put("km", req.getParameter("currentKm"));
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90
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91 if (logger.isDebugEnabled()) {
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92 logger.debug("====== ZOOM VALUES =======");
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93 logger.debug(" min x: " + req.getParameter("minx"));
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94 logger.debug(" max x: " + req.getParameter("maxx"));
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95 logger.debug(" min y: " + req.getParameter("miny"));
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96 logger.debug(" max y: " + req.getParameter("maxy"));
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97 }
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98
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99 return attr;
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100 }
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101
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102
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103 protected void prepareHeader(
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104 HttpServletRequest req,
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105 HttpServletResponse resp
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106 ) {
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107 String export = req.getParameter("export");
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108
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109 if (export != null && export.equals("true")) {
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110 String format = req.getParameter("format");
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111
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112 if (format == null || format.length() == 0) {
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113 format = "png";
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114 }
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115
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116 String fn = "chart_export" + getFileExtension(format);
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117
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118 resp.setHeader("Content-Disposition", "attachment;filename=" + fn);
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119 resp.setHeader("Content-Type", getMimeType(format));
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120 }
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121 }
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122
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123
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124 protected String getFileExtension(String format) {
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125 if (format.equals("png")) {
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126 return ".png";
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127 }
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128 else if (format.equals("pdf")) {
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129 return ".pdf";
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130 }
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131 else if (format.equals("svg")) {
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132 return ".svg";
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133 }
1587
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
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134 else if (format.equals("csv")) {
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135 return ".csv";
45cd2364adad Issue 466.
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parents: 1425
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136 }
1344
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137
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138 return ".png";
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139 }
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140
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141
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142 protected String getMimeType(String format) {
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143 if (format.equals("png")) {
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144 return "image/png";
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145 }
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146 else if (format.equals("pdf")) {
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147 return "application/pdf";
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148 }
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149 else if (format.equals("svg")) {
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150 return "svg+xml";
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151 }
1587
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
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152 else if (format.equals("csv")) {
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
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153 return "text/plain";
45cd2364adad Issue 466.
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parents: 1425
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154 }
1344
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155
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156 return "image/png";
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157 }
78
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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158 }
280
b493d606fdef Enabled the client to request charts in different sizes.
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159 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org