implementing load balancers

src/Ocelot/DownstreamUrlCreator/Middleware/DownstreamUrlCreatorMiddleware.cs

@@ -46,12 +46,18 @@ namespace Ocelot.DownstreamUrlCreator.Middleware
 
             var dsScheme = DownstreamRoute.ReRoute.DownstreamScheme;
 
+            //here we could have a lb factory that takes stuff or we could just get the load balancer from the reRoute?
+            //returns the lb for this request
+            
+            //lease the next address from the lb
+
             var dsHostAndPort = DownstreamRoute.ReRoute.DownstreamHostAndPort();
 
             var dsUrl = _urlBuilder.Build(dsPath.Data.Value, dsScheme, dsHostAndPort);
 
             if (dsUrl.IsError)
             {
+                //todo - release the lb connection?
                 _logger.LogDebug("IUrlBuilder returned an error, setting pipeline error");
 
                 SetPipelineError(dsUrl.Errors);
@@ -66,6 +72,8 @@ namespace Ocelot.DownstreamUrlCreator.Middleware
 
             await _next.Invoke(context);
 
+            //todo - release the lb connection?
+
             _logger.LogDebug("succesfully called next middleware");
         }
     }

src/Ocelot/Errors/OcelotErrorCode.cs

@@ -21,6 +21,8 @@
         DownstreamPathTemplateContainsSchemeError,
         DownstreamPathNullOrEmptyError,
         DownstreamSchemeNullOrEmptyError,
-        DownstreamHostNullOrEmptyError
+        DownstreamHostNullOrEmptyError,
+        ServicesAreNullError,
+        ServicesAreEmptyError
     }
 }

src/Ocelot/Values/HostAndPort.cs

@@ -10,5 +10,10 @@
 
         public string DownstreamHost { get; private set; }
         public int DownstreamPort { get; private set; }
+
+        public override string ToString()
+        {
+            return $"{DownstreamHost}:{DownstreamPort}";
+        }
     }
 }