RelayClintObservableInitializeAsync(
string relayNamespace,
string connectionName,
string keyName,
string key)
{
if (_isInitialized)
{
throw new RelayClientException("Relay client can only be initialized once. Create a new instance, if multiple clients are needed.");
}
_isInitialized = true;
var tokenProvider = TokenProvider.CreateSharedAccessSignatureTokenProvider(keyName, key);
var client = new HybridConnectionClient(new Uri($"sb://{relayNamespace}/{connectionName}"), tokenProvider);
// Initiate the connection.
_relayConnection = await client.CreateConnectionAsync();
_writer = new StreamWriter(_relayConnection)
{
AutoFlush = true
};
var reader = new StreamReader(_relayConnection);
var readerObservable = Observable.FromAsync(reader.ReadLineAsync);
var observableMessages = Observable.Create <string>(obs =>
{
var disposableReader = Observable.While(
() => true,
readerObservable)
.Subscribe(stringLine =>
{
Debug.WriteLine(stringLine);
// If there's no input data, signal that
// you will no longer send data on this connection.
// Then, break out of the processing loop.
if (string.IsNullOrEmpty(stringLine))
{
obs.OnCompleted();
}
obs.OnNext(stringLine);
},
ex =>
{
Debug.WriteLine(ex.ToString());
if (ex is IOException)
{
// Catch an I/O exception. This likely occurred when
// the client disconnected.
}
else
{
obs.OnError(ex);
}
},
obs.OnCompleted);
return(new CompositeDisposable(
disposableReader,
Disposable.Create(() =>
{
reader?.Dispose();
_writer?.Dispose();
_relayConnection?.Dispose();
})));
}).Publish().RefCount();
return(observableMessages);
}