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msgutil.go
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msgutil.go
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package msgutil
import (
"encoding/binary"
"fmt"
"github.com/dgryski/go-farm"
"github.com/tablera/taskq/v3"
"github.com/tablera/taskq/v3/internal"
)
func WrapMessage(msg *taskq.Message) *taskq.Message {
msg0 := taskq.NewMessage(msg.Ctx, msg)
msg0.Name = msg.Name
return msg0
}
func UnwrapMessage(msg *taskq.Message) (*taskq.Message, error) {
if len(msg.Args) != 1 {
err := fmt.Errorf("UnwrapMessage: got %d args, wanted 1", len(msg.Args))
return nil, err
}
msg, ok := msg.Args[0].(*taskq.Message)
if !ok {
err := fmt.Errorf("UnwrapMessage: got %v, wanted *taskq.Message", msg.Args)
return nil, err
}
return msg, nil
}
func UnwrapMessageHandler(fn interface{}) taskq.HandlerFunc {
if fn == nil {
return nil
}
h := fn.(func(*taskq.Message) error)
return taskq.HandlerFunc(func(msg *taskq.Message) error {
msg, err := UnwrapMessage(msg)
if err != nil {
return err
}
return h(msg)
})
}
func FullMessageName(q taskq.Queue, msg *taskq.Message) string {
ln := len(q.Name()) + len(msg.TaskName)
data := make([]byte, 0, ln+len(msg.Name))
data = append(data, q.Name()...)
data = append(data, msg.TaskName...)
data = append(data, msg.Name...)
b := make([]byte, 3+8+8)
copy(b, "tq:")
// Hash message name.
h := farm.Hash64(data[ln:])
binary.BigEndian.PutUint64(b[3:11], h)
// Hash queue name and use it as a seed.
seed := farm.Hash64(data[:ln])
// Hash everything using the seed.
h = farm.Hash64WithSeed(data, seed)
binary.BigEndian.PutUint64(b[11:19], h)
return internal.BytesToString(b)
}