/// <summary>
/// Returns a DeviceConnection from the DeviceConnection pool. If a connection to the specified device does not exist in the pool one is created.
/// </summary>
/// <param name="deviceId">Name of the target device.</param>
/// <param name="createdImplicitly">Indicates wether the connection was established explicitly by an application or implicitly through the CreateStream or CreateTunnel methods.</param>
/// <returns>The DeviceConnection.</returns>
DeviceConnection GetDeviceConnection(string deviceId, bool createdImplicitly)
{
DeviceConnection deviceConnection = null;
WeakReference wr;
if (deviceConnections.TryGetValue(deviceId, out wr))
{
deviceConnection = wr.Target as DeviceConnection;
}
if (deviceConnection == null)
{
deviceConnection = DeviceConnection.Create(this, deviceId, createdImplicitly);
}
else
{
if (deviceConnection.CreatedImplicitly != createdImplicitly)
{
throw new NabtoClientException(NabtoStatus.Failed, "Can not connect to a device both explicitly and implicitly.");
}
}
return(deviceConnection);
}
internal void Unregister(DeviceConnection deviceConnection)
{
lock (deviceConnections)
{
Log.Write("Session.Unregister<DeviceConnection>()");
deviceConnections.Remove(deviceConnection.DeviceId);
}
}
internal void Register(DeviceConnection deviceConnection)
{
lock (deviceConnections)
{
Log.Write("Session.Register<DeviceConnection>()");
deviceConnections[deviceConnection.DeviceId] = new WeakReference(deviceConnection);
}
}
internal static DeviceConnection Create(Session owner, string deviceId, bool createdImplicitly)
{
if (deviceId == null)
{
throw new ArgumentNullException("deviceId");
}
var instance = new DeviceConnection(owner, deviceId, createdImplicitly);
owner.Register(instance);
return(instance);
}