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redislocker.go
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/
redislocker.go
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package redislocker
import (
"context"
"time"
"github.com/boxgo/box/pkg/client/redis"
"github.com/boxgo/box/pkg/locker"
)
type (
// Locker redis lock
Locker struct {
cfg *Config
client *redis.Redis
}
)
func newLocker(cfg *Config) locker.MutexLocker {
lock := &Locker{
cfg: cfg,
client: redis.StdConfig(cfg.Config).Build(),
}
return lock
}
// Lock key
func (l *Locker) Lock(ctx context.Context, key string, duration time.Duration) (bool, error) {
return l.client.Client().SetNX(ctx, l.cacheKey(key), time.Now().Unix(), duration).Result()
}
// IsLocked return is is locked
func (l *Locker) IsLocked(ctx context.Context, key string) (bool, error) {
result, err := l.client.Client().Exists(ctx, l.cacheKey(key)).Result()
if err == redis.Nil {
return false, nil
} else if err != nil {
return false, err
}
return result == 1, nil
}
// UnLock unlock key
func (l *Locker) UnLock(ctx context.Context, key string) error {
_, err := l.client.Client().Del(ctx, l.cacheKey(key)).Result()
return err
}
func (l *Locker) cacheKey(key string) string {
cacheKey := l.cfg.Prefix
if cacheKey == "" {
cacheKey = locker.UnifiedKey(key)
}
return cacheKey
}