private ConnectionStatusChangeResult Disable(string connectionKey, bool updateState)
{
var changeResult = new ConnectionStatusChangeResult();
lock (lockObject)
{
if (connections.ContainsKey(connectionKey))
{
Tuple <ConnectionStatus, CancellationTokenSource> previousConnectionValue = connections[connectionKey];
connections[connectionKey] = new Tuple <ConnectionStatus, CancellationTokenSource>(ConnectionStatus.Disabled, null);
changeResult.IsConnectionStatusChanged = true;
if (updateState)
{
Tuple <ConnectionStatus, ConnectionStatus> beforeAndAfterState = UpdateDeviceClientState();
changeResult.IsClientStatusChanged = beforeAndAfterState.Item1 != beforeAndAfterState.Item2;
changeResult.ClientStatus = beforeAndAfterState.Item2;
}
if (previousConnectionValue.Item2 != null)
{
previousConnectionValue.Item2.Cancel();
}
}
}
return(changeResult);
}
public ConnectionStatusChangeResult ChangeTo(string connectionKey, ConnectionStatus toState, ConnectionStatus?fromState = null, CancellationTokenSource cancellationTokenSource = null)
{
if (toState == ConnectionStatus.Disabled)
{
return(Disable(connectionKey, true));
}
Tuple <ConnectionStatus, CancellationTokenSource> connectionValue;
if (toState == ConnectionStatus.Disconnected_Retrying)
{
if (cancellationTokenSource == null)
{
throw new ArgumentNullException($"{nameof(cancellationTokenSource)} should be provided for retrying state.");
}
connectionValue = Tuple.Create(toState, cancellationTokenSource);
}
else
{
connectionValue = new Tuple <ConnectionStatus, CancellationTokenSource>(toState, null);
}
var changeResult = new ConnectionStatusChangeResult
{
ClientStatus = this.status
};
lock (lockObject)
{
if (connections.ContainsKey(connectionKey))
{
ConnectionStatus existingConnectionState = connections[connectionKey].Item1;
if (((existingConnectionState != ConnectionStatus.Disconnected && existingConnectionState != ConnectionStatus.Disabled) || toState == ConnectionStatus.Connected) &&
(!fromState.HasValue || fromState.Value == existingConnectionState))
{
connections[connectionKey] = connectionValue;
changeResult.IsConnectionStatusChanged = true;
}
}
else
{
if (toState == ConnectionStatus.Connected && (!fromState.HasValue || fromState.Value == ConnectionStatus.Disconnected))
{
connections.Add(connectionKey, connectionValue);
changeResult.IsConnectionStatusChanged = true;
}
}
if (changeResult.IsConnectionStatusChanged)
{
Tuple <ConnectionStatus, ConnectionStatus> beforeAndAfterState = UpdateDeviceClientState();
changeResult.IsClientStatusChanged = beforeAndAfterState.Item1 != beforeAndAfterState.Item2;
changeResult.ClientStatus = beforeAndAfterState.Item2;
}
}
return(changeResult);
}
public ConnectionStatusChangeResult ChangeTo(ConnectionType connectionType, ConnectionStatus toState, ConnectionStatus?fromState = null)
{
if (toState == ConnectionStatus.Disabled)
{
return(Disable(connectionType, true));
}
var changeResult = new ConnectionStatusChangeResult
{
ClientStatus = this.status
};
lock (lockObject)
{
if (connections.ContainsKey(connectionType))
{
ConnectionStatus existingConnectionState = connections[connectionType].Item1;
CancellationTokenSource existingCancellationTokenSource = connections[connectionType].Item2;
if (((existingConnectionState != ConnectionStatus.Disconnected && existingConnectionState != ConnectionStatus.Disabled) || toState == ConnectionStatus.Connected) &&
(!fromState.HasValue || fromState.Value == existingConnectionState))
{
CancellationTokenSource changeStatusCancellationTokenSource = null;
if (toState == ConnectionStatus.Disconnected_Retrying)
{
changeStatusCancellationTokenSource = new CancellationTokenSource();
}
connections[connectionType] = new Tuple <ConnectionStatus, CancellationTokenSource>(toState, changeStatusCancellationTokenSource);
changeResult.StatusChangeCancellationTokenSource = changeStatusCancellationTokenSource;
changeResult.IsConnectionStatusChanged = true;
// When status is changed from Disconnected_Retrying, dispose cancellation token as it is no longer valid.
if (existingConnectionState == ConnectionStatus.Disconnected_Retrying && existingCancellationTokenSource != null)
{
existingCancellationTokenSource.Dispose();
}
}
}
else
{
if (toState == ConnectionStatus.Connected && (!fromState.HasValue || fromState.Value == ConnectionStatus.Disconnected))
{
connections.Add(connectionType, new Tuple <ConnectionStatus, CancellationTokenSource>(toState, null));
changeResult.IsConnectionStatusChanged = true;
}
}
if (changeResult.IsConnectionStatusChanged)
{
Tuple <ConnectionStatus, ConnectionStatus> beforeAndAfterState = UpdateDeviceClientState();
changeResult.IsClientStatusChanged = beforeAndAfterState.Item1 != beforeAndAfterState.Item2;
changeResult.ClientStatus = beforeAndAfterState.Item2;
}
}
return(changeResult);
}