54 lines
1016 B
Go
54 lines
1016 B
Go
package cqrs
|
|
|
|
import (
|
|
"encoding/json"
|
|
|
|
"github.com/ThreeDotsLabs/watermill"
|
|
"github.com/ThreeDotsLabs/watermill/message"
|
|
)
|
|
|
|
type JSONMarshaler struct {
|
|
NewUUID func() string
|
|
GenerateName func(v interface{}) string
|
|
}
|
|
|
|
func (m JSONMarshaler) Marshal(v interface{}) (*message.Message, error) {
|
|
b, err := json.Marshal(v)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
msg := message.NewMessage(
|
|
m.newUUID(),
|
|
b,
|
|
)
|
|
msg.Metadata.Set("name", m.Name(v))
|
|
|
|
return msg, nil
|
|
}
|
|
|
|
func (m JSONMarshaler) newUUID() string {
|
|
if m.NewUUID != nil {
|
|
return m.NewUUID()
|
|
}
|
|
|
|
// default
|
|
return watermill.NewUUID()
|
|
}
|
|
|
|
func (JSONMarshaler) Unmarshal(msg *message.Message, v interface{}) (err error) {
|
|
return json.Unmarshal(msg.Payload, v)
|
|
}
|
|
|
|
func (m JSONMarshaler) Name(cmdOrEvent interface{}) string {
|
|
if m.GenerateName != nil {
|
|
return m.GenerateName(cmdOrEvent)
|
|
}
|
|
|
|
return FullyQualifiedStructName(cmdOrEvent)
|
|
}
|
|
|
|
func (m JSONMarshaler) NameFromMessage(msg *message.Message) string {
|
|
return msg.Metadata.Get("name")
|
|
}
|