public int compare(Object a, Object b) {
RemoteFileDesc pongA = (RemoteFileDesc) a;
RemoteFileDesc pongB = (RemoteFileDesc) b;
// Multicasts are best
if (pongA.isReplyToMulticast() != pongB.isReplyToMulticast()) {
if (pongA.isReplyToMulticast()) return -1;
else return 1;
}
// HeadPongs with highest number of free slots get the highest priority
if (pongA.getQueueStatus() > pongB.getQueueStatus()) return 1;
else if (pongA.getQueueStatus() < pongB.getQueueStatus()) return -1;
// Within the same queue rank, firewalled hosts get priority
if (pongA.needsPush() != pongB.needsPush()) {
if (pongA.needsPush()) return -1;
else return 1;
}
// Within the same queue/fwall, partial hosts get priority
if (pongA.isPartialSource() != pongB.isPartialSource()) {
if (pongA.isPartialSource()) return -1;
else return 1;
}
// the two pongs seem completely the same
return pongA.hashCode() - pongB.hashCode();
}
private boolean addInternal(RemoteFileDesc host) {
// initialize the sha1 if we don't have one
if (sha1 == null) {
if (host.getSHA1Urn() != null) sha1 = host.getSHA1Urn();
else // BUGFIX: We can't discard sources w/out a SHA1 when we dont' have
// a SHA1 for the download, or else it won't be possible to download a
// file from a query hit without a SHA1, if we can received UDP pings
return testedLocations.add(host); // we can't do anything yet
}
// do not allow duplicate hosts
if (running && knowsAboutHost(host)) return false;
if (LOG.isDebugEnabled()) LOG.debug("adding new host " + host + " " + host.getPushAddr());
boolean ret = false;
// don't bother ranking multicasts
if (host.isReplyToMulticast()) ret = verifiedHosts.add(host);
else ret = newHosts.add(host); // rank
// make sure that if we were stopped, we return true
ret = ret | !running;
// initialize the guid if we don't have one
if (myGUID == null && meshHandler != null) {
myGUID = new GUID(GUID.makeGuid());
RouterService.getMessageRouter().registerMessageListener(myGUID.bytes(), this);
}
return ret;
}
public boolean isReplyToMulticast() {
return remoteFileDesc.isReplyToMulticast();
}