Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/ChartOutputServiceImpl.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 5e38e2924c07
children 07d51fd4864c 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.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
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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. This can be used
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33 * to stream an image that is displayed in the UI afterwards.
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34 *
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35 * Note that a chart output can also be a csv file.
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36 *
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37 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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38 */
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39 public class ChartOutputServiceImpl
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40 extends HttpServlet
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41 {
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42 private static final Logger log =
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43 Logger.getLogger(ChartOutputServiceImpl.class);
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44
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45
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46 /** Handle a get, collectionOut. */
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47 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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48 log.info("ChartOutputServiceImpl.doGet");
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49
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50 try {
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51 OutputStream out = resp.getOutputStream();
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52
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53 String url = getServletContext().getInitParameter("server-url");
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54
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55 String uuid = req.getParameter("uuid");
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56 String type = req.getParameter("type");
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57 String locale = req.getParameter("locale");
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58
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59 prepareHeader(req, resp);
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60
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61 Document request = ClientProtocolUtils.newOutCollectionDocument(
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62 uuid, type, type,
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63 ChartServiceHelper.getChartAttributes(
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64 prepareChartAttributes(req)));
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65
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66 HttpClient client = new HttpClientImpl(url, locale);
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67
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68 client.collectionOut(request, uuid, "chart", out);
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69
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70 out.close();
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71 out.flush();
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72 }
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73 catch (IOException ioe) {
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74 log.error(ioe, ioe);
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75 }
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76 catch (Exception e) {
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77 log.error(e, e);
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78 }
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79 }
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80
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81
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82 protected Map<String, String> prepareChartAttributes(
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83 HttpServletRequest req
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84 ) {
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85 Map<String, String> attr = new HashMap<String, String>();
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86
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87 Map params = req.getParameterMap();
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88
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89 attr.put("width", req.getParameter("width"));
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90 attr.put("height", req.getParameter("height"));
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91 attr.put("minx", req.getParameter("minx"));
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92 attr.put("maxx", req.getParameter("maxx"));
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93 attr.put("miny", req.getParameter("miny"));
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94 attr.put("maxy", req.getParameter("maxy"));
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95 attr.put("format", req.getParameter("format"));
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96 attr.put("km", req.getParameter("currentKm"));
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97
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98 if (log.isDebugEnabled()) {
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99 log.debug("====== ZOOM VALUES =======");
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100 log.debug(" min x: " + req.getParameter("minx"));
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101 log.debug(" max x: " + req.getParameter("maxx"));
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102 log.debug(" min y: " + req.getParameter("miny"));
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103 log.debug(" max y: " + req.getParameter("maxy"));
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104 }
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105
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106 return attr;
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107 }
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108
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109
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110 protected void prepareHeader(
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111 HttpServletRequest req,
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112 HttpServletResponse resp
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113 ) {
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114 String export = req.getParameter("export");
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115
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116 if (export != null && export.equals("true")) {
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117 String format = req.getParameter("format");
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118
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119 if (format == null || format.length() == 0) {
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120 format = "png";
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121 }
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122
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123 String fn = "chart_export" + getFileExtension(format);
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124
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125 resp.setHeader("Content-Disposition", "attachment;filename=" + fn);
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126 resp.setHeader("Content-Type", getMimeType(format));
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127 }
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128 }
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129
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130
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131 protected String getFileExtension(String format) {
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132 if (format.equals("png")) {
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133 return ".png";
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134 }
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135 else if (format.equals("pdf")) {
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136 return ".pdf";
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137 }
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138 else if (format.equals("svg")) {
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139 return ".svg";
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140 }
1587
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
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141 else if (format.equals("csv")) {
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
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142 return ".csv";
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
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143 }
1344
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144
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145 return ".png";
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parents: 549
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146 }
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147
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148
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149 protected String getMimeType(String format) {
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150 if (format.equals("png")) {
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151 return "image/png";
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152 }
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153 else if (format.equals("pdf")) {
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154 return "application/pdf";
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parents: 549
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155 }
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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156 else if (format.equals("svg")) {
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
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157 return "svg+xml";
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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158 }
1587
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
diff changeset
159 else if (format.equals("csv")) {
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
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160 return "text/plain";
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
diff changeset
161 }
1344
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162
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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163 return "image/png";
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parents: 549
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164 }
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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165 }
280
b493d606fdef Enabled the client to request charts in different sizes.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 254
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166 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org