/// <summary>
/// Constructor
/// </summary>
/// <param name="functionName">Function name</param>
/// <param name="callback">Callback for data</param>
/// <param name="delayMilliseconds">Delay after invoking each object[] in param, used if the server will disconnect you for too many invoke too fast</param>
/// <param name="param">End point parameters, each array of strings is a separate call to the end point function. For no parameters, pass null.</param>
/// <returns>Connection</returns>
public async Task OpenAsync(string functionName, Func <string, Task> callback, int delayMilliseconds = 0, object[][] param = null)
{
callback.ThrowIfNull(nameof(callback), "Callback must not be null");
SignalrManager _manager = this.manager;
_manager.ThrowIfNull(nameof(manager), "Manager is null");
Exception ex = null;
param = (param ?? new object[][] { new object[0] });
string functionFullName = _manager.GetFunctionFullName(functionName);
this.functionFullName = functionFullName;
while (true)
{
await _manager.AddListener(functionName, callback, param);
try
{
// ask for proxy after adding the listener, as the listener will force a connection if needed
IHubProxy _proxy = _manager.hubProxy;
if (_proxy == null)
{
throw new ArgumentNullException("Hub proxy is null");
}
// all parameters must succeed or we will give up and try the loop all over again
for (int i = 0; i < param.Length; i++)
{
if (i != 0)
{
await Task.Delay(delayMilliseconds);
}
bool result = await _proxy.Invoke <bool>(functionFullName, param[i]).ConfigureAwait(false);
if (!result)
{
throw new APIException("Invoke returned success code of false");
}
}
break;
}
catch (Exception _ex)
{
// fail, remove listener
_manager.RemoveListener(functionName, callback);
ex = _ex;
Logger.Info("Error invoking hub proxy {0}: {1}", functionFullName, ex);
if (disposed || manager.disposed)
{
// give up, if we or the manager is disposed we are done
break;
}
else
{
// try again in a bit...
await Task.Delay(500);
}
}
}
if (ex == null)
{
this.callback = callback;
lock (_manager.sockets)
{
_manager.sockets.Add(this);
}
return;
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="manager">Manager</param>
public SignalrSocketConnection(SignalrManager manager)
{
this.manager = manager;
}