Mercurial > dive4elements > river
comparison flys-aft/src/main/java/de/intevation/aft/Notification.java @ 4095:da9df3641578
Send XML messages via HTTP POST around if the FLYS database has changed.
flys-aft/trunk@3614 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Fri, 06 Jan 2012 12:10:40 +0000 |
| parents | |
| children | 06891562e633 |
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| 4094:b20b710aa86f | 4095:da9df3641578 |
|---|---|
| 1 package de.intevation.aft; | |
| 2 | |
| 3 import de.intevation.utils.XML; | |
| 4 | |
| 5 import java.io.IOException; | |
| 6 import java.io.InputStream; | |
| 7 import java.io.OutputStream; | |
| 8 | |
| 9 import java.net.URL; | |
| 10 import java.net.URLConnection; | |
| 11 import java.net.HttpURLConnection; | |
| 12 | |
| 13 import org.w3c.dom.Document; | |
| 14 import org.w3c.dom.Node; | |
| 15 import org.w3c.dom.NodeList; | |
| 16 | |
| 17 import org.apache.log4j.Logger; | |
| 18 | |
| 19 public class Notification | |
| 20 { | |
| 21 private static Logger log = Logger.getLogger(Notification.class); | |
| 22 | |
| 23 protected Document message; | |
| 24 | |
| 25 public Notification() { | |
| 26 } | |
| 27 | |
| 28 public Notification(Document message) { | |
| 29 this.message = message; | |
| 30 } | |
| 31 | |
| 32 public Notification(Node message) { | |
| 33 this(wrap(message)); | |
| 34 } | |
| 35 | |
| 36 public static Document wrap(Node node) { | |
| 37 Document document = XML.newDocument(); | |
| 38 | |
| 39 // Send first element as message. | |
| 40 // Fall back to root node. | |
| 41 Node toImport = node; | |
| 42 | |
| 43 NodeList children = node.getChildNodes(); | |
| 44 for (int i = 0, N = children.getLength(); i < N; ++i) { | |
| 45 Node child = children.item(i); | |
| 46 if (child.getNodeType() == Node.ELEMENT_NODE) { | |
| 47 toImport = child; | |
| 48 break; | |
| 49 } | |
| 50 } | |
| 51 | |
| 52 toImport = document.importNode(toImport, true); | |
| 53 document.appendChild(toImport); | |
| 54 document.normalizeDocument(); | |
| 55 return document; | |
| 56 } | |
| 57 | |
| 58 public Document sendPOST(URL url) { | |
| 59 | |
| 60 OutputStream out = null; | |
| 61 InputStream in = null; | |
| 62 Document result = null; | |
| 63 | |
| 64 try { | |
| 65 URLConnection ucon = url.openConnection(); | |
| 66 | |
| 67 if (!(ucon instanceof HttpURLConnection)) { | |
| 68 log.warn("'" + url + "' is not an HTTP(S) connection."); | |
| 69 return null; | |
| 70 } | |
| 71 | |
| 72 HttpURLConnection con = (HttpURLConnection)ucon; | |
| 73 | |
| 74 con.setRequestMethod("POST"); | |
| 75 con.setDoInput(true); | |
| 76 con.setDoOutput(true); | |
| 77 con.setUseCaches(false); | |
| 78 con.setRequestProperty("Content-Type", "text/xml"); | |
| 79 | |
| 80 out = con.getOutputStream(); | |
| 81 XML.toStream(message, out); | |
| 82 out.flush(); | |
| 83 in = con.getInputStream(); | |
| 84 result = XML.parseDocument(in); | |
| 85 } | |
| 86 catch (IOException ioe) { | |
| 87 log.error("Sending message to '" + url + "' failed.", ioe); | |
| 88 } | |
| 89 finally { | |
| 90 if (out != null) { | |
| 91 try { out.close(); } catch (IOException ioe) {} | |
| 92 } | |
| 93 if (in != null) { | |
| 94 try { in.close(); } catch (IOException ioe) {} | |
| 95 } | |
| 96 } | |
| 97 | |
| 98 return result; | |
| 99 } | |
| 100 } | |
| 101 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |