static VersionedConnection createVersionedConnection(
final Channel channel, final Map<String, ?> environment, final JMXServiceURL serviceURL)
throws IOException {
// We don't want to start chaining the use of IoFutures otherwise multiple threads are tied up
// for a single negotiation process so negotiate the connection sequentially.
IoFuture<InitialHeader> futureHeader = ClientVersionReceiver.getInitialHeader(channel);
IoFuture.Status result = futureHeader.await(5, TimeUnit.SECONDS);
switch (result) {
case DONE:
break;
case FAILED:
throw futureHeader.getException();
default:
throw new IOException("Timeout out waiting for header, status=" + result.toString());
}
InitialHeader header = futureHeader.get();
Versions versions = new Versions(environment);
Set<Byte> supportedVersions =
versions.getSupportedVersions(getRequiredCapabilities(serviceURL));
// Find the highest version. - By this point the exceptional handling of version 0x00 will have
// completed.
byte highest = 0x00;
for (byte current : header.versions) {
// Only accept it if it is one of the supported versions otherwise ignore as noise.
if (supportedVersions.contains(current) && current > highest) {
highest = current;
}
}
if (highest == 0x00) {
throw new IllegalStateException("No matching supported protocol version found.");
}
// getVersionedConnection may also make use of an IoFuture but our previous use of one has
// ended.
return versions.getVersionedConnection(highest, channel, serviceURL);
}
public Connection connectSync(
CallbackHandler handler, Map<String, String> saslOptions, SSLContext sslContext)
throws IOException {
CallbackHandler actualHandler = handler != null ? handler : new AnonymousCallbackHandler();
WrapperCallbackHandler wrapperHandler = new WrapperCallbackHandler(actualHandler);
final IoFuture<Connection> future = connect(wrapperHandler, saslOptions, sslContext);
long timeoutMillis = configuration.getConnectionTimeout();
IoFuture.Status status = future.await(timeoutMillis, TimeUnit.MILLISECONDS);
while (status == IoFuture.Status.WAITING) {
if (wrapperHandler.isInCall()) {
// If there is currently an interaction with the user just wait again.
status = future.await(timeoutMillis, TimeUnit.MILLISECONDS);
} else {
long lastInteraction = wrapperHandler.getCallFinished();
if (lastInteraction > 0) {
long now = System.currentTimeMillis();
long timeSinceLast = now - lastInteraction;
if (timeSinceLast < timeoutMillis) {
// As this point we are setting the timeout based on the time of the last interaction
// with the user, if there is any time left we will wait for that time but dont wait for
// a full timeout.
status = future.await(timeoutMillis - timeSinceLast, TimeUnit.MILLISECONDS);
} else {
status = null;
}
} else {
status = null; // Just terminate status processing.
}
}
}
if (status == IoFuture.Status.DONE) {
return future.get();
}
if (status == IoFuture.Status.FAILED) {
throw ProtocolMessages.MESSAGES.failedToConnect(uri, future.getException());
}
throw ProtocolMessages.MESSAGES.couldNotConnect(uri);
}
