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using Google.Protobuf;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reactive.Subjects;
using System.Text;
using System.Threading.Tasks;
using Tango.Core.ExtensionMethods;
using Tango.Core.Threading;
using Tango.Logging;
using Tango.PMR;
using Tango.PMR.Common;
namespace Tango.Transport
{
/// <summary>
/// Represents a generic transport message.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <seealso cref="Tango.Transport.TransportMessageBase" />
internal class TransportMessage<T> : TransportMessageBase
{
private bool exceptionRaised;
private TaskCompletionSource<T> _completionSource;
public Subject<T> ContinuesResponseSubject { get; set; }
public DateTime LastResponseTime { get; set; }
public bool Completed { get; set; }
/// <summary>
/// Initializes a new instance of the <see cref="TransportMessage{T}"/> class.
/// </summary>
/// <param name="token">The token.</param>
/// <param name="message">The message.</param>
/// <param name="direction">The direction.</param>
/// <param name="toBytes">To bytes.</param>
/// <param name="completionSource">The completion source.</param>
public TransportMessage(string token, object message, TransportMessageDirection direction, Func<byte[]> toBytes, TaskCompletionSource<T> completionSource) : base(token, message, direction, toBytes)
{
_completionSource = completionSource;
}
/// <summary>
/// Notifies the message observer of the new result.
/// </summary>
/// <param name="result">The result.</param>
public override void SetResult(object result, bool completed)
{
Completed = completed;
ThreadFactory.StartNew(() =>
{
try
{
if (!IsContinuous)
{
if (!_completionSource.Task.IsCompleted)
{
if (_completionSource.GetType() == typeof(TaskCompletionSource<IMessage>))
{
_completionSource.SetResult((T)result.GetType().GetProperty("Message").GetValue(result));
}
else if (_completionSource.GetType() == typeof(TaskCompletionSource<MessageContainer>))
{
_completionSource.SetResult((T)result.GetType().GetProperty("Container").GetValue(result));
}
else
{
_completionSource.SetResult((T)result);
}
}
}
else
{
LastResponseTime = DateTime.Now;
AtLeastOneResponseReceived = true;
if (ContinuesResponseSubject.GetType() == typeof(Subject<IMessage>))
{
ContinuesResponseSubject.OnNext((T)result.GetType().GetProperty("Message").GetValue(result));
}
else if (ContinuesResponseSubject.GetType() == typeof(Subject<MessageContainer>))
{
ContinuesResponseSubject.OnNext((T)result.GetType().GetProperty("Container").GetValue(result));
}
else
{
ContinuesResponseSubject.OnNext((T)result);
}
if (completed)
{
ContinuesResponseSubject.OnCompleted();
}
}
}
catch (Exception ex)
{
LogManager.Log(ex, $"Error while settings result for message.");
try
{
SetException(ex);
}
catch (Exception e)
{
LogManager.Log(e, $"Error while settings exception for message.");
}
}
});
}
/// <summary>
/// Notifies the message observer of an exception.
/// </summary>
/// <param name="ex">The ex.</param>
public override void SetException(Exception ex)
{
if (exceptionRaised)
{
return;
}
Completed = true;
exceptionRaised = true;
ThreadFactory.StartNew(() =>
{
if (!IsContinuous)
{
if (!_completionSource.Task.IsCompleted)
{
if (!(ex is ContinuousResponseAbortedException) && !(ex is TransporterDisconnectedException))
{
LogManager.Log($"{TransportComponentName}: Request failed '{GetActualMessageTypeName()}'...\n{ex.FlattenException()}", LogCategory.Error);
}
_completionSource.SetException(ex);
}
}
else
{
if (!(ex is ContinuousResponseAbortedException) && !(ex is TransporterDisconnectedException))
{
LogManager.Log($"{TransportComponentName}: Request failed '{GetActualMessageTypeName()}'...\n{ex.FlattenException()}", LogCategory.Error);
}
AtLeastOneResponseReceived = true;
ContinuesResponseSubject.OnError(ex);
}
});
}
public override string GetActualMessageTypeName()
{
String name = String.Empty;
if (Message is ITangoMessage)
{
name = Message.GetType().GetProperty("Message").GetValue(Message).GetType().Name;
}
else if (Message is MessageContainer)
{
name = (Message as MessageContainer).Type.ToString();
}
else
{
name = Message.GetType().Name;
}
return name;
}
public override object GetActualMessage()
{
object obj = null;
if (Message is ITangoMessage)
{
obj = Message.GetType().GetProperty("Message").GetValue(Message);
}
else if (Message is MessageContainer)
{
obj = Message;
}
else
{
obj = Message;
}
return obj;
}
}
}
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