Add client Response.Data type that is not Storable.

example/client/custom.go

@@ -0,0 +1,12 @@
+package client
+
+type customMakerRegistry struct {
+	registry map[string]func() interface{}
+}
+
+func (c *customMakerRegistry) Register(k string, gen func() interface{}) (old func() interface{}, ok bool) {
+	old, ok = c.registry[k]
+	c.registry[k] = gen
+
+	return old, ok
+}

example/client/mlyc/mlyc.go

@@ -25,5 +25,11 @@ func main() {
 		return &segmenteds
 	})
 
+	// this is an example usage of a non-Storable type being bound to Response.Data
+	client.CustomMakerRegistry.Register("custom", func() interface{} {
+		// TODO provide actual example
+		return struct{}{}
+	})
+
 	client.Run(os.Args[1:])
 }

example/client/option.go

@@ -12,8 +12,9 @@ type Options struct {
 	Debug     bool   `long:"debug"`
 	TimeoutUs int    `short:"t" long:"timeout"`
 
-	Model    string `short:"m" long:"model" description:"model"`
-	Storable string `short:"s" long:"storable"`
+	Model       string `short:"m" long:"model" description:"model"`
+	Storable    string `short:"s" long:"storable"`
+	CustomMaker string `long:"maker" description:"non-storable Response.Data, requires binding with CustomMaker"`
 
 	CacheMB     int  `long:"cache"`
 	NoHashCheck bool `long:"nohash"`

example/client/runner.go

@@ -13,6 +13,9 @@ import (
 	"github.com/viant/toolbox"
 )
 
+// Use CustomMakerRegistry with --maker to use a specific entity for Response.Data.
+var CustomMakerRegistry *customMakerRegistry = new(customMakerRegistry)
+
 func RunWithOptions(options *Options) error {
 	options.Init()
 	if err := options.Validate(); err != nil {
@@ -74,6 +77,8 @@ func RunWithOptions(options *Options) error {
 
 			response := &client.Response{}
 
+			var dataSetter func() interface{}
+
 			storableSrv := storable.Singleton()
 			maker, err := storableSrv.Lookup(options.Storable)
 			if err != nil {
@@ -84,7 +89,22 @@ func RunWithOptions(options *Options) error {
 				maker = checker.Generated(cli.Config.Datastore.MetaInput.Outputs, pl.Batch, false)
 			}
 
-			response.Data = maker()
+			dataSetter = func() interface{} {
+				return maker()
+			}
+
+			if options.CustomMaker != "" {
+				custom, ok := CustomMakerRegistry.registry[options.CustomMaker]
+				if !ok {
+					if options.Debug {
+						fmt.Printf("no such custom maker:\"%s\"\n", options.CustomMaker)
+					}
+				} else {
+					dataSetter = custom
+				}
+			}
+
+			response.Data = dataSetter()
 
 			ctx := context.Background()
 			cancel := func() {}