Mercurial > dive4elements > river

annotate flys-aft/src/main/java/de/intevation/aft/Notification.java @ 5744:5bb179d4fd5f

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SedimentLoadFacet: Avoid weird steps, find correct measurement stations.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 17 Apr 2013 14:53:16 +0200
parents f939e1e6cfa4
children
rev   line source
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da9df3641578 Send XML messages via HTTP POST around if the FLYS database has changed.
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1 package de.intevation.aft;
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2
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3 import de.intevation.utils.XML;
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4
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5 import java.io.IOException;
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6 import java.io.InputStream;
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7 import java.io.OutputStream;
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8
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9 import java.net.HttpURLConnection;
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10 import java.net.URL;
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11 import java.net.URLConnection;
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12
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13 import org.apache.log4j.Logger;
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14
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15 import org.w3c.dom.Document;
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16 import org.w3c.dom.Node;
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17 import org.w3c.dom.NodeList;
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18
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19 public class Notification
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20 {
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21 private static Logger log = Logger.getLogger(Notification.class);
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22
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23 protected Document message;
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24
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25 public Notification() {
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26 }
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27
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28 public Notification(Document message) {
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29 this.message = message;
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30 }
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31
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32 public Notification(Node message) {
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33 this(wrap(message));
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34 }
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35
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36 public static Document wrap(Node node) {
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37 Document document = XML.newDocument();
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38
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39 // Send first element as message.
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40 // Fall back to root node.
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41 Node toImport = node;
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42
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43 NodeList children = node.getChildNodes();
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44 for (int i = 0, N = children.getLength(); i < N; ++i) {
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45 Node child = children.item(i);
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46 if (child.getNodeType() == Node.ELEMENT_NODE) {
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47 toImport = child;
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48 break;
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49 }
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50 }
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51
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52 toImport = document.importNode(toImport, true);
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53 document.appendChild(toImport);
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54 document.normalizeDocument();
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55 return document;
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56 }
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57
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58 public Document sendPOST(URL url) {
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59
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60 OutputStream out = null;
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61 InputStream in = null;
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62 Document result = null;
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63
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64 try {
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65 URLConnection ucon = url.openConnection();
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66
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67 if (!(ucon instanceof HttpURLConnection)) {
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68 log.warn("NOTIFY: '" + url + "' is not an HTTP(S) connection.");
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69 return null;
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70 }
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71
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72 HttpURLConnection con = (HttpURLConnection)ucon;
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73
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74 con.setRequestMethod("POST");
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75 con.setDoInput(true);
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76 con.setDoOutput(true);
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77 con.setUseCaches(false);
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78 con.setRequestProperty("Content-Type", "text/xml");
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79
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80 out = con.getOutputStream();
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81 XML.toStream(message, out);
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82 out.flush();
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83 in = con.getInputStream();
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84 result = XML.parseDocument(in);
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85 }
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86 catch (IOException ioe) {
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87 log.error("NOTIFY: Sending message to '" + url + "' failed.", ioe);
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88 }
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89 finally {
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90 if (out != null) {
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91 try { out.close(); } catch (IOException ioe) {}
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92 }
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93 if (in != null) {
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94 try { in.close(); } catch (IOException ioe) {}
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95 }
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96 }
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97
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98 return result;
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99 }
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100 }
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101 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org