/// <summary>
/// Handle error message.
/// </summary>
/// <param name="msg">Error message.</param>
/// <param name="metadata">Information about data and the TCP connection it came from.</param>
/// <returns>List of response messages.</returns>
private List <Message> HandleMessage(ErrorMessage msg, TcpDataProviderMetadata metadata)
{
Logger.Error(msg.ErrorType + " error message received: \n" + msg.ErrorText);
return(new List <Message> {
CreateNoOperationMessage()
});
}
/// <summary>
/// Handle status message.
/// </summary>
/// <param name="msg">Status message.</param>
/// <param name="metadata">Information about data and the TCP connection it came from.</param>
/// <returns>List of response messages.</returns>
private List <Message> HandleMessage(StatusMessage msg, TcpDataProviderMetadata metadata)
{
var responses = new List <Message>();
if (!_componentOverseer.IsRegistered(msg.ComponentId))
{
Logger.Warn("The component is not registered (id: " + msg.ComponentId + ").");
var errorMsg = new ErrorMessage
{
ErrorType = ErrorType.UnknownSender,
ErrorText = "Component unregistered."
};
responses.Add(errorMsg);
}
else
{
_componentOverseer.UpdateTimestamp(msg.ComponentId);
var component = _componentOverseer.GetComponent(msg.ComponentId);
component.ThreadInfo = msg.Threads;
switch (component.ComponentType)
{
case ComponentType.ComputationalNode:
case ComponentType.TaskManager:
{
Work work;
_workManager.TryAssignWork((SolverNodeInfo)component, out work);
if (work != null)
{
responses.Add(work.CreateMessage());
}
break;
}
case ComponentType.CommunicationServer:
{
//TODO get stuff from the sync queue
break;
}
}
}
if (responses.Count == 0)
{
responses.Add(CreateNoOperationMessage());
}
return(responses);
}
/// <summary>
/// Handle solve request message.
/// </summary>
/// <param name="msg">Solve request message.</param>
/// <param name="metadata">Information about data and the TCP connection it came from.</param>
/// <returns>List of response messages.</returns>
private List <Message> HandleMessage(SolveRequestMessage msg, TcpDataProviderMetadata metadata)
{
var solvingTimeout = msg.SolvingTimeout ?? ulong.MaxValue;
var id = _workManager.AddProblem(msg.ProblemType, msg.ProblemData, solvingTimeout);
var response = new SolveRequestResponseMessage
{
AssignedId = id
};
return(new List <Message> {
response
});
}
/// <summary>
/// Invoked on TCP client acceptance; reads data from its buffer.
/// </summary>
/// <param name="ar">Data about the socket.</param>
private void AcceptCallback(IAsyncResult ar)
{
_clientAcceptanceEvent.Set();
if (!_isListening)
{
return;
}
var listenerSocket = (Socket)ar.AsyncState;
var clientSocket = listenerSocket.EndAccept(ar);
Logger.Trace("Client accepted.");
var buffer = new byte[ReadBufferSize];
using (var memStream = new MemoryStream())
{
int bytesRead;
do
{
bytesRead = clientSocket.Receive(buffer);
memStream.Write(buffer, 0, bytesRead);
} while (bytesRead > 0);
var metadata = new TcpDataProviderMetadata
{
ReceptionTime = DateTime.UtcNow,
SenderAddress = (IPEndPoint)clientSocket.RemoteEndPoint
};
_dataProcessor.EnqueueDataToProcess(
memStream.ToArray(),
metadata,
GenerateResponseCallback(clientSocket));
Logger.Trace("Client sent " + memStream.Length + " bytes of data.");
}
}
/// <summary>
/// Handle registration message.
/// </summary>
/// <param name="msg">Register message.</param>
/// <param name="metadata">Information about data and the TCP connection it came from.</param>
/// <returns>List of response messages.</returns>
private List <Message> HandleMessage(RegisterMessage msg, TcpDataProviderMetadata metadata)
{
ComponentInfo componentInfo;
switch (msg.ComponentType)
{
case ComponentType.CommunicationServer:
var serverInfo = new ServerInfo
{
IpAddress = metadata.SenderAddress.Address.ToString(),
Port = (ushort)metadata.SenderAddress.Port
};
componentInfo = new BackupServerInfo(serverInfo, msg.ParallelThreads);
break;
case ComponentType.ComputationalNode:
case ComponentType.TaskManager:
componentInfo = new SolverNodeInfo(msg.ComponentType, msg.SolvableProblems, msg.ParallelThreads);
break;
default:
throw new InvalidOperationException("Invalid component type registration (" + msg.ComponentType +
").");
}
_componentOverseer.TryRegister(componentInfo);
var responseMsg = new RegisterResponseMessage
{
AssignedId = componentInfo.ComponentId.Value,
BackupServers = CreateBackupList(),
CommunicationTimeout = _componentOverseer.CommunicationTimeout
};
return(new List <Message> {
responseMsg
});
}
/// <summary>
/// Handle solutios message.
/// </summary>
/// <param name="msg">Solutions message.</param>
/// <param name="metadata">Information about data and the TCP connection it came from.</param>
/// <returns>List of response messages.</returns>
private List <Message> HandleMessage(SolutionsMessage msg, TcpDataProviderMetadata metadata)
{
var responses = new List <Message>();
var senderId = _workManager.GetProcessingNodeId(msg.ProblemInstanceId, msg.Solutions[0].PartialProblemId);
if (!senderId.HasValue)
{
Logger.Error("Couldn't identify the sender.");
var errorMsg = new ErrorMessage
{
ErrorType = ErrorType.UnknownSender,
ErrorText = "The server couldn't identify the sender component."
};
responses.Add(errorMsg);
}
else if (!_componentOverseer.IsRegistered(senderId.Value))
{
Logger.Warn("The component is not registered (id: " + senderId.Value + ").");
var errorMsg = new ErrorMessage
{
ErrorType = ErrorType.UnknownSender,
ErrorText = "Component unregistered."
};
responses.Add(errorMsg);
}
else
{
_componentOverseer.UpdateTimestamp(senderId.Value);
foreach (var solution in msg.Solutions)
{
if (solution.Type == SolutionsMessage.SolutionType.Final)
{
_workManager.AddSolution(
msg.ProblemInstanceId,
solution.Data,
solution.ComputationsTime,
solution.TimeoutOccured);
}
else if (solution.Type == SolutionsMessage.SolutionType.Partial)
{
if (!solution.PartialProblemId.HasValue)
{
Logger.Error("Received partial solution doesn't have partial problem id set.");
continue;
}
_workManager.AddPartialSolution(
msg.ProblemInstanceId,
solution.PartialProblemId.Value,
solution.Data,
solution.ComputationsTime,
solution.TimeoutOccured);
}
}
var component = _componentOverseer.GetComponent(senderId.Value) as SolverNodeInfo;
Work work;
_workManager.TryAssignWork(component, out work);
if (work != null)
{
responses.Add(work.CreateMessage());
}
}
if (responses.Count == 0)
{
responses.Add(CreateNoOperationMessage());
}
return(responses);
}
/// <summary>
/// Handle partial problems message.
/// </summary>
/// <param name="msg">Partial problems message.</param>
/// <param name="metadata">Information about data and the TCP connection it came from.</param>
/// <returns>List of response messages.</returns>
private List <Message> HandleMessage(PartialProblemsMessage msg, TcpDataProviderMetadata metadata)
{
var responses = new List <Message>();
var senderId = _workManager.GetProcessingNodeId(msg.ProblemInstanceId);
if (!senderId.HasValue)
{
Logger.Error("Couldn't identify the sender.");
var errorMsg = new ErrorMessage
{
ErrorType = ErrorType.UnknownSender,
ErrorText = "The server couldn't identify the sender component."
};
responses.Add(errorMsg);
}
else if (!_componentOverseer.IsRegistered(senderId.Value))
{
Logger.Warn("The component is not registered (id: " + senderId + ").");
var errorMsg = new ErrorMessage
{
ErrorType = ErrorType.UnknownSender,
ErrorText = "Component unregistered."
};
responses.Add(errorMsg);
}
else
{
_componentOverseer.UpdateTimestamp(senderId.Value);
var problem = _workManager.GetProblem(msg.ProblemInstanceId);
if (problem.CommonData != null)
{
Logger.Warn("Common data shouldn't be set.");
}
problem.CommonData = msg.CommonData;
foreach (var pp in msg.PartialProblems)
{
_workManager.AddPartialProblem(msg.ProblemInstanceId, pp.PartialProblemId, pp.Data);
}
var component = _componentOverseer.GetComponent(senderId.Value) as SolverNodeInfo;
Work work;
_workManager.TryAssignWork(component, out work);
if (work != null)
{
responses.Add(work.CreateMessage());
}
}
if (responses.Count == 0)
{
responses.Add(CreateNoOperationMessage());
}
return(responses);
}
/// <summary>
/// Handle message received from the cluster component.
/// </summary>
/// <typeparam name="T">Class-type of the received message.</typeparam>
/// <param name="msg">Received message.</param>
/// <param name="metadata">Information about data and the TCP connection it came from.</param>
/// <returns>List of response messages.</returns>
private List <Message> HandleMessageGeneric <T>(T msg, TcpDataProviderMetadata metadata) where T : Message
{
return(HandleMessage((dynamic)msg, metadata));
}
/// <summary>
/// Handle solution request message.
/// </summary>
/// <param name="msg">Solution request message.</param>
/// <param name="metadata">Information about data and the TCP connection it came from.</param>
/// <returns>List of response messages.</returns>
private List <Message> HandleMessage(SolutionRequestMessage msg, TcpDataProviderMetadata metadata)
{
var solution = _workManager.GetSolution(msg.ProblemInstanceId);
var problem = _workManager.GetProblem(msg.ProblemInstanceId);
Message response;
if (solution != null)
{
problem = solution.Problem;
var msgSolution = new SolutionsMessage.Solution
{
ComputationsTime = solution.ComputationsTime,
Data = solution.Data,
TimeoutOccured = solution.TimeoutOccured,
Type = SolutionsMessage.SolutionType.Final
};
response = new SolutionsMessage
{
CommonData = problem.CommonData,
ProblemInstanceId = problem.Id,
ProblemType = problem.Type,
Solutions = new List <SolutionsMessage.Solution> {
msgSolution
}
};
}
else if (problem != null)
{
var msgSolution = new SolutionsMessage.Solution
{
ComputationsTime = _workManager.GetComputationsTime(problem.Id),
TimeoutOccured = false,
Type = SolutionsMessage.SolutionType.Ongoing
};
response = new SolutionsMessage
{
CommonData = problem.CommonData,
ProblemInstanceId = problem.Id,
ProblemType = problem.Type,
Solutions = new List <SolutionsMessage.Solution> {
msgSolution
}
};
}
else
{
response = new ErrorMessage
{
ErrorType = ErrorType.ExceptionOccured,
ErrorText = "The specified problem id is unknown to the system."
};
}
return(new List <Message> {
response
});
}
/// <summary>
/// Invoked on TCP client acceptance; reads data from its buffer.
/// </summary>
/// <param name="ar">Data about the socket.</param>
private void AcceptCallback(IAsyncResult ar)
{
_clientAcceptanceEvent.Set();
if (!_isListening)
return;
var listenerSocket = (Socket)ar.AsyncState;
var clientSocket = listenerSocket.EndAccept(ar);
Logger.Trace("Client accepted.");
var buffer = new byte[ReadBufferSize];
using (var memStream = new MemoryStream())
{
int bytesRead;
do
{
bytesRead = clientSocket.Receive(buffer);
memStream.Write(buffer, 0, bytesRead);
} while (bytesRead > 0);
var metadata = new TcpDataProviderMetadata
{
ReceptionTime = DateTime.UtcNow,
SenderAddress = (IPEndPoint)clientSocket.RemoteEndPoint
};
_dataProcessor.EnqueueDataToProcess(
memStream.ToArray(),
metadata,
GenerateResponseCallback(clientSocket));
Logger.Trace("Client sent " + memStream.Length + " bytes of data.");
}
}
