Added method to override default services lifetime

samples/PowerPipe.Sample/Program.cs

@@ -21,10 +21,12 @@ private static IServiceProvider ConfigureServices()
         //setup dependency injection
         IServiceCollection services = new ServiceCollection();
 
-        services.AddPowerPipe(c =>
+        services.AddPowerPipe(config =>
         {
-            c.RegisterServicesFromAssemblies(Assembly.GetExecutingAssembly())
-                .AddBehavior(typeof(SampleGenericStep<>), ServiceLifetime.Scoped);
+            config
+                .RegisterServicesFromAssemblies(Assembly.GetExecutingAssembly())
+                .ChangeDefaultLifetime(ServiceLifetime.Scoped)
+                .AddBehavior(typeof(SampleGenericStep<>), ServiceLifetime.Singleton);
         });
 
         services.AddSingleton<SamplePipeline>();

src/PowerPipe.Extensions.MicrosoftDependencyInjection/PowerPipeConfiguration.cs

@@ -17,7 +17,24 @@ public class PowerPipeConfiguration
     internal ICollection<Assembly> AssembliesToRegister { get; } = new List<Assembly>();
 
     internal ICollection<ServiceDescriptor> BehaviorsToRegister { get; } = new List<ServiceDescriptor>();
-
+
+    internal ServiceLifetime DefaultLifetime { get; private set; } = ServiceLifetime.Transient;
+
+    /// <summary>
+    /// Changes default (Transient) service registration life time
+    /// </summary>
+    /// <param name="lifetime"></param>
+    /// <returns></returns>
+    public PowerPipeConfiguration ChangeDefaultLifetime(ServiceLifetime lifetime)
+    {
+        if (DefaultLifetime == lifetime)
+            return this;
+
+        DefaultLifetime = lifetime;
+
+        return this;
+    }
+
     /// <summary>
     /// Register assembly to search implementations of steps from
     /// </summary>

src/PowerPipe.Extensions.MicrosoftDependencyInjection/ServiceRegistrar.cs

@@ -90,7 +90,18 @@ private static void ConnectImplementationsToTypes(
 
             foreach (var type in exactMatches.Where(type => configuration.BehaviorsToRegister.All(c => c.ImplementationType != type)))
             {
-                services.TryAddTransient(type);
+                switch (configuration.DefaultLifetime)
+                {
+                    case ServiceLifetime.Singleton:
+                        services.TryAddSingleton(type);
+                        break;
+                    case ServiceLifetime.Scoped:
+                        services.TryAddScoped(type);
+                        break;
+                    case ServiceLifetime.Transient:
+                        services.TryAddTransient(type);
+                        break;
+                }
             }
 
             if (!inf.IsOpenGeneric())