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greetings.go
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/
greetings.go
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package main
import (
"context"
"fmt"
"log/slog"
"os"
"os/signal"
"github.com/nats-io/nats.go"
"github.com/verifa/horizon/examples/greetings"
"github.com/verifa/horizon/pkg/hz"
)
func main() {
if err := run(); err != nil {
slog.Error("running", "error", err)
os.Exit(1)
}
}
func run() error {
// Establish a connection to the NATS server.
conn, err := nats.Connect(
nats.DefaultURL,
nats.UserCredentials("nats.creds"),
)
if err != nil {
return fmt.Errorf("connect: %w", err)
}
ctx := context.Background()
// Handle interrupts.
ctx, stop := signal.NotifyContext(ctx, os.Interrupt)
defer stop()
actor, err := hz.StartActor(
ctx,
conn,
hz.WithActorActioner(
greetings.GreetingsHelloAction{},
),
)
if err != nil {
return fmt.Errorf("start actor: %w", err)
}
defer func() {
_ = actor.Stop()
}()
validator := greetings.GreetingValidator{}
reconciler := greetings.GreetingReconciler{
GreetingClient: hz.ObjectClient[greetings.Greeting]{
Client: hz.NewClient(
conn,
hz.WithClientInternal(true),
hz.WithClientManager("ctlr-greetings"),
),
},
}
ctlr, err := hz.StartController(
ctx,
conn,
hz.WithControllerFor(greetings.Greeting{}),
hz.WithControllerReconciler(&reconciler),
hz.WithControllerValidator(&validator),
)
if err != nil {
return fmt.Errorf("start controller: %w", err)
}
defer func() {
_ = ctlr.Stop()
}()
portalHandler := greetings.PortalHandler{
Conn: conn,
}
router := portalHandler.Router()
portal, err := hz.StartPortal(ctx, conn, greetings.Portal, router)
if err != nil {
return fmt.Errorf("start portal: %w", err)
}
defer func() {
_ = portal.Stop()
}()
<-ctx.Done()
return nil
}