public CommandPipeline(ExclusiveHandlerCommandBus commandBus)
{
Guard.EnsureNotNull(commandBus, nameof(commandBus));
IssueCommand = new IssueCommand(commandBus);
rootStage = IssueCommand;
}
public void SetRoot(CommandPipelineStage root)
{
Guard.EnsureNotNull(root, nameof(root));
EnsureIssueCommandInPipeline(root);
rootStage = root;
}
private static void EnsureIssueCommandInPipeline(CommandPipelineStage root)
{
var issueCommandStage = FindStage <IssueCommand>(root);
if (issueCommandStage == null)
{
throw new MissingIssueCommandStageException();
}
}
private static TStage FindStage <TStage>(CommandPipelineStage stage) where TStage : CommandPipelineStage
{
var s = stage as TStage;
if (s != null)
{
return(s);
}
if (stage.Next != null)
{
return(FindStage <TStage>(stage.Next));
}
return(null);
}
