@Override
public void shutdown(final Callback<None> callback) {
if (_shutdown.compareAndSet(false, true)) {
_client.shutdown(
new Callback<None>() {
@Override
public void onSuccess(None none) {
try {
callback.onSuccess(none);
} finally {
clientShutdown();
}
}
@Override
public void onError(Throwable e) {
try {
callback.onError(e);
} finally {
clientShutdown();
}
}
});
} else {
callback.onError(new IllegalStateException("shutdown has already been requested."));
}
}
@Override
public void shutdown(Callback<None> callback) {
_wrappedClient.shutdown(callback);
}