initial commit

examples/basic/commands.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"time"
+)
+
+type Entity struct {
+	Name    string
+	Address string
+}
+
+type GetName struct {
+	UID   string
+	Sleep time.Duration
+
+	Result Entity
+}
+
+func (b *GetName) CorrelationID() string {
+	return b.UID
+}
+
+func (b *GetName) Execute(context.Context) error {
+	b.Result = Entity{Name: "Bob"}
+
+	if b.Sleep > 0 {
+		time.Sleep(b.Sleep)
+	}
+
+	return nil
+}
+
+func (b *GetName) Rollback(context.Context) error {
+	b.Result = Entity{}
+
+	return nil
+}
+
+type GetAddress struct {
+	Input *Entity
+
+	Result Entity
+}
+
+func (b *GetAddress) CorrelationID() string {
+	return b.Input.Name
+}
+
+func (b *GetAddress) Execute(context.Context) error {
+	b.Result = *b.Input
+	if b.Result.Address != "" {
+		return errors.New("already set")
+	}
+
+	b.Result.Address = "London"
+
+	return nil
+}
+
+func (b *GetAddress) Rollback(context.Context) error {
+	b.Result = Entity{}
+
+	return nil
+}