/** {@inheritDoc} */
@Override
public Document getDocument(MimeMediaType asMimeType) {
StructuredDocument adv =
StructuredDocumentFactory.newStructuredDocument(asMimeType, getAdvertisementType());
if (adv instanceof XMLDocument) {
XMLDocument xmlDoc = (XMLDocument) adv;
xmlDoc.addAttribute("xmlns:jxta", "http://jxta.org");
xmlDoc.addAttribute("xml:space", "preserve");
}
Element e;
e = adv.createElement(typeTag, Integer.toString(getDiscoveryType()));
adv.appendChild(e);
int threshold = getThreshold();
if (threshold < 0) {
throw new IllegalStateException("threshold must be >= 0");
}
e = adv.createElement(thresholdTag, Integer.toString(threshold));
adv.appendChild(e);
PeerAdvertisement peerAdv = getPeerAdvertisement();
if ((peerAdv != null)) {
e = adv.createElement(peerAdvTag, peerAdv.toString());
adv.appendChild(e);
}
String attr = getAttr();
if ((attr != null) && (attr.length() > 0)) {
e = adv.createElement(queryAttrTag, attr.trim());
adv.appendChild(e);
String value = getValue();
if ((value != null) && (value.length() > 0)) {
e = adv.createElement(queryValueTag, value.trim());
adv.appendChild(e);
} else {
if (threshold < 0) {
throw new IllegalStateException("Attribute specified, but no value was specified.");
}
}
}
return adv;
}
/** @see net.jxta.discovery.DiscoveryListener#discoveryEvent(DiscoveryEvent) */
public void discoveryEvent(DiscoveryEvent event) {
// copied from JXTA Examples - PeerDiscovery
System.out.println("Process discovery event...");
DiscoveryResponseMsg response = event.getResponse();
// Get the responding peer's advertisement as a string
String responderAdvString = response.getPeerAdv();
InputStream is = null;
try {
// create a peer advertisement
is = new ByteArrayInputStream(responderAdvString.getBytes());
PeerAdvertisement responderAdv =
(PeerAdvertisement) AdvertisementFactory.newAdvertisement(XML_MIME_TYPE, is);
System.out.println(
" [ Got a Discovery Response ["
+ response.getResponseCount()
+ " elements] from peer: "
+ responderAdv.getName()
+ " ]");
} catch (java.io.IOException e) {
// bogus peer, skip this message alltogether.
System.out.println("Warning: cannot parse remote peer's advertisement.\n" + e.getMessage());
return;
} finally {
if (is != null) {
try {
is.close();
} catch (Throwable throwable) {
System.out.println(
"Ignoring failure to close stream " + "on remote peer's advertisement");
throwable.printStackTrace();
}
}
}
// now print out each discovered peer
PeerAdvertisement newAdv = null;
Enumeration responses = response.getResponses();
while (responses.hasMoreElements()) {
try {
String responseString = (String) responses.nextElement();
// create an advertisement object from each element
newAdv =
(PeerAdvertisement)
AdvertisementFactory.newAdvertisement(
XML_MIME_TYPE, new ByteArrayInputStream(responseString.getBytes()));
System.out.println(" Peer name = " + newAdv.getName());
} catch (java.io.IOException e) {
// got a bad response. continue to the next response
System.out.println("Warning: cannot parse response element.\n" + e.getMessage());
continue;
}
} // end while
}