NServiceBus v5 Pipeline Inspector

PipelineInspector.cs

public class PipelineInspector : IWantToRunWhenBusStartsAndStops
{
    private readonly ReadOnlySettings settings;

    public PipelineInspector(ReadOnlySettings settings)
    {
        this.settings = settings;
    }

    public void Start()
    {
        var pipelineModificationsType = Type.GetType("NServiceBus.Pipeline.PipelineModifications, NServiceBus.Core");
        var pipelineBuilderType = Type.GetType("NServiceBus.Pipeline.PipelineBuilder, NServiceBus.Core");

        var pipelineModifications = typeof(ReadOnlySettings).GetMethods()
            .Single(x => x.Name == "Get" && x.IsGenericMethod && x.GetParameters().Any() == false)
            .MakeGenericMethod(pipelineModificationsType)
            .Invoke(settings, null);

        var pipelineBuilder = Activator.CreateInstance(pipelineBuilderType, pipelineModifications);

        var incomingSteps = (List<RegisterStep>)pipelineBuilderType.GetProperty("Incoming").GetValue(pipelineBuilder);
        var outgoingSteps = (List<RegisterStep>)pipelineBuilderType.GetProperty("Outgoing").GetValue(pipelineBuilder);

        var sb = new StringBuilder();
        sb.AppendLine("INCOMING");
        sb.AppendLine("--------");
        foreach (var step in incomingSteps)
        {
            sb.AppendLine(step.BehaviorType.Name);
        }
        Log.InfoFormat(sb.ToString());

        sb.Clear();

        sb.AppendLine("OUTGOING");
        sb.AppendLine("--------");
        foreach (var step in outgoingSteps)
        {
            sb.AppendLine(step.BehaviorType.Name);
        }
        Log.InfoFormat(sb.ToString());
    }

    public void Stop()
    {
    }

    private static ILog Log = LogManager.GetLogger<PipelineInspector>();
}

Drop this into an NSB v5 solution and it will log out the Incoming and Outgoing behavior pipelines.

NOTE: This relies on reflection as the API and the data is not exposed by the core. As such it is liable to stop working in any given version.

This will no longer work in v6 as the pipeline is more complex.