callbacks service draft

api/edge/callbacks/internal/delivery/module.go

@@ -0,0 +1,48 @@
+package delivery
+
+import (
+	"context"
+	"time"
+
+	"github.com/tech/sendico/edge/callbacks/internal/retry"
+	"github.com/tech/sendico/edge/callbacks/internal/security"
+	"github.com/tech/sendico/edge/callbacks/internal/signing"
+	"github.com/tech/sendico/edge/callbacks/internal/storage"
+	"github.com/tech/sendico/pkg/mlogger"
+)
+
+// Observer captures delivery metrics.
+type Observer interface {
+	ObserveDelivery(result string, statusCode int, duration time.Duration)
+}
+
+// Config controls delivery worker runtime.
+type Config struct {
+	WorkerConcurrency int
+	WorkerPoll        time.Duration
+	LockTTL           time.Duration
+	RequestTimeout    time.Duration
+	JitterRatio       float64
+}
+
+// Dependencies configure delivery dispatcher.
+type Dependencies struct {
+	Logger   mlogger.Logger
+	Config   Config
+	Tasks    storage.TaskRepo
+	Retry    retry.Policy
+	Security security.Validator
+	Signer   signing.Signer
+	Observer Observer
+}
+
+// Service executes callback delivery tasks.
+type Service interface {
+	Start(ctx context.Context)
+	Stop()
+}
+
+// New creates delivery service.
+func New(deps Dependencies) (Service, error) {
+	return newService(deps)
+}