/// <summary>
/// Logs the command we received to the inbox.
/// If the Once Only flag is set, it will reject commands that it has already seen from the pipeline
/// </summary>
/// <param name="command">The command that we want to store.</param>
/// <returns>The parameter to allow request handlers to be chained together in a pipeline</returns>
public override T Handle(T command)
{
if (_onceOnly)
{
s_logger.LogDebug("Checking if command {Id} has already been seen", command.Id);
var exists = _inbox.Exists <T>(command.Id, _contextKey);
if (exists && _onceOnlyAction is OnceOnlyAction.Throw)
{
s_logger.LogDebug("Command {Id} has already been seen", command.Id);
throw new OnceOnlyException($"A command with id {command.Id} has already been handled");
}
if (exists && _onceOnlyAction is OnceOnlyAction.Warn)
{
s_logger.LogWarning("Command {Id} has already been seen", command.Id);
return(command);
}
}
T handledCommand = base.Handle(command);
s_logger.LogDebug("Writing command {Id} to the Inbox", command.Id);
_inbox.Add(command, _contextKey);
return(handledCommand);
}
