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types.go
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/
types.go
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/*
* Copyright 2017, Automatic Inc.
* All rights reserved.
*
* Author: Michael Ngo
*/
package hedwig
import (
"strconv"
"time"
)
// Message format versions
const (
FormatVersionV1 = "1.0"
FormatCurrentVersion = FormatVersionV1
)
// JSONTime is just a wrapper around time that serializes time to epoch in milliseconds
type JSONTime time.Time
// MarshalJSON changes time to epoch in milliseconds
func (t JSONTime) MarshalJSON() ([]byte, error) {
epochMs := time.Time(t).UnixNano() / int64(time.Millisecond)
return []byte(strconv.FormatInt(epochMs, 10)), nil
}
// UnmarshalJSON changes time from epoch in milliseconds
func (t *JSONTime) UnmarshalJSON(b []byte) error {
epochMs, err := strconv.Atoi(string(b))
if err != nil {
return err
}
duration := time.Duration(epochMs) * time.Millisecond
epochNS := duration.Nanoseconds()
*t = JSONTime(time.Unix(0, epochNS))
return nil
}