public InputStream createIncomingStream(StreamInitiation initiation) throws XMPPException {
PacketCollector collector =
connection.createPacketCollector(
getInitiationPacketFilter(initiation.getFrom(), initiation.getSessionID()));
connection.sendPacket(super.createInitiationAccept(initiation, getNamespaces()));
ExecutorService threadPoolExecutor = Executors.newFixedThreadPool(2);
CompletionService<InputStream> service =
new ExecutorCompletionService<InputStream>(threadPoolExecutor);
List<Future<InputStream>> futures = new ArrayList<Future<InputStream>>();
InputStream stream = null;
XMPPException exception = null;
try {
futures.add(service.submit(new NegotiatorService(collector)));
futures.add(service.submit(new NegotiatorService(collector)));
int i = 0;
while (stream == null && i < futures.size()) {
Future<InputStream> future;
try {
i++;
future = service.poll(10, TimeUnit.SECONDS);
} catch (InterruptedException e) {
continue;
}
if (future == null) {
continue;
}
try {
stream = future.get();
} catch (InterruptedException e) {
/* Do Nothing */
} catch (ExecutionException e) {
exception = new XMPPException(e.getCause());
}
}
} finally {
for (Future<InputStream> future : futures) {
future.cancel(true);
}
collector.cancel();
threadPoolExecutor.shutdownNow();
}
if (stream == null) {
if (exception != null) {
throw exception;
} else {
throw new XMPPException("File transfer negotiation failed.");
}
}
return stream;
}
