/// <summary>
/// Register a pipe with the junction.
/// </summary>
/// <remarks>
/// <para>
/// Pipes are registered by unique name and type,
/// which must be either <c>Junction.INPUT</c>
/// or <c>Junction.OUTPUT</c>.
/// </para>
/// <para>
/// NOTE: You cannot have an INPUT pipe and an OUTPUT
/// pipe registered with the same name. All pipe names
/// must be unique regardless of type.
/// </para>
/// </remarks>
/// <param name="name">name of the pipe</param>
/// <param name="type">type (INPUT/OUTPUT) of the pipe</param>
/// <param name="pipe">Pipefitting</param>
/// <returns>true if successfully registered. false if another pipe exists by that name.</returns>
public virtual bool RegisterPipe(string name, string type, IPipeFitting pipe)
{
bool success = true;
if (PipesMaps.TryGetValue(name, out IPipeFitting value) == false && PipesMaps.TryAdd(name, pipe) && PipeTypesMap.TryAdd(name, type))
{
switch (type)
{
case INPUT:
InputPipes.Add(name);
break;
case OUTPUT:
OutputPipes.Add(name);
break;
default:
success = false;
break;
}
}
else
{
success = false;
}
return(success);
}
/// <summary>
/// Add a PipeListener to an INPUT pipe.
/// </summary>
/// <remarks>
/// <para>
/// NOTE: there can only be one PipeListener per pipe,
/// and the listener function must accept an IPipeMessage
/// as its sole argument.
/// </para>
/// </remarks>
/// <param name="inputPipeName">name the INPUT pipe to add a PipeListener to</param>
/// <param name="context">context the calling context or 'this' object </param>
/// <param name="listener">listener the function on the context to call</param>
/// <returns></returns>
public virtual bool AddPipeListener(string inputPipeName, object context, Action <IPipeMessage> listener)
{
bool success = false;
if (HasInputPipe(inputPipeName) && PipesMaps.TryGetValue(inputPipeName, out IPipeFitting pipe))
{
success = pipe.Connect(new PipeListener(context, listener));
}
return(success);
}
/// <summary>
/// Send a message on an OUTPUT pipe.
/// </summary>
/// <param name="outputPipeName">name the OUTPUT pipe to send the message on</param>
/// <param name="message">message the IPipeMessage to send </param>
/// <returns>Boolean true if message was sent successfully</returns>
public virtual bool SendMessage(string outputPipeName, IPipeMessage message)
{
bool success = false;
if (HasOutputPipe(outputPipeName) && PipesMaps.TryGetValue(outputPipeName, out IPipeFitting pipe))
{
success = pipe.Write(message);
}
return(success);
}
/// <summary>
/// Retrieve the named pipe.
/// </summary>
/// <param name="name">name the pipe to retrieve</param>
/// <returns>IPipeFitting the pipe registered by the given name if it exists</returns>
public virtual IPipeFitting RetrievePipe(string name)
{
return(PipesMaps.TryGetValue(name, out IPipeFitting pipe) ? pipe : null);
}