CAT-RD8: minio asks the assigner's seat-holders once and follows its events, no reads, no cache on a timer

modules/minio/cmd/object-store/main.go

@@ -10,10 +10,14 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"os"
 
 	stdio "git.novox.be/novox/mesh-sdk/go"
+	"git.novox.be/novox/mesh-sdk/go/delivery"
+
+	"git.novox.be/novox/mesh-delivery/sdk/views"
 )
 
 // Words the manifest gives this bundle (modules/minio/module.json).
@@ -24,17 +28,24 @@ const (
 )
 
 func main() {
-	s, err := newServer(os.Getenv(ConfigWord), os.Getenv(LinksWord), os.Getenv(ReceivesWord))
+	seats := &views.Reader{Module: "minio", Logf: func(f string, a ...any) { fmt.Fprintf(os.Stderr, "[object-store] "+f+"\n", a...) }}
+	seats.Follow(delivery.AssignerModule, delivery.SeatHoldersState, SeatHoldersTool)
+	s, err := newServer(os.Getenv(ConfigWord), os.Getenv(LinksWord), os.Getenv(ReceivesWord),
+		func() (map[string][]byte, error) { return seats.Values(delivery.SeatHoldersRead) })
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "[object-store] %v\n", err)
 		os.Exit(1)
 	}
-	if err := stdio.Serve("", tools(s)); err != nil {
+	seats.Start(context.Background())
+	if err := stdio.Serve("", append(tools(s), seats.Tools("object_store")...)); err != nil {
 		fmt.Fprintf(os.Stderr, "[object-store] %v\n", err)
 		os.Exit(1)
 	}
 }
 
+// SeatHoldersTool is the assigner's read tool of who holds which seat, which the manifest invokes (ADR 0615).
+const SeatHoldersTool = delivery.AssignerModule + ".assigner_read_seat_holders"
+
 func tools(s *server) []stdio.Tool {
 	return []stdio.Tool{{
 		Name: "object-store.link",