mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-20 03:23:26 +02:00
111 lines
2.8 KiB
Go
111 lines
2.8 KiB
Go
|
package redis
|
||
|
|
||
|
import (
|
||
|
"github.com/go-redis/redis/internal/pool"
|
||
|
"github.com/go-redis/redis/internal/proto"
|
||
|
)
|
||
|
|
||
|
// TxFailedErr transaction redis failed.
|
||
|
const TxFailedErr = proto.RedisError("redis: transaction failed")
|
||
|
|
||
|
// Tx implements Redis transactions as described in
|
||
|
// http://redis.io/topics/transactions. It's NOT safe for concurrent use
|
||
|
// by multiple goroutines, because Exec resets list of watched keys.
|
||
|
// If you don't need WATCH it is better to use Pipeline.
|
||
|
type Tx struct {
|
||
|
statefulCmdable
|
||
|
baseClient
|
||
|
}
|
||
|
|
||
|
func (c *Client) newTx() *Tx {
|
||
|
tx := Tx{
|
||
|
baseClient: baseClient{
|
||
|
opt: c.opt,
|
||
|
connPool: pool.NewStickyConnPool(c.connPool.(*pool.ConnPool), true),
|
||
|
},
|
||
|
}
|
||
|
tx.baseClient.init()
|
||
|
tx.statefulCmdable.setProcessor(tx.Process)
|
||
|
return &tx
|
||
|
}
|
||
|
|
||
|
// Watch prepares a transaction and marks the keys to be watched
|
||
|
// for conditional execution if there are any keys.
|
||
|
//
|
||
|
// The transaction is automatically closed when fn exits.
|
||
|
func (c *Client) Watch(fn func(*Tx) error, keys ...string) error {
|
||
|
tx := c.newTx()
|
||
|
if len(keys) > 0 {
|
||
|
if err := tx.Watch(keys...).Err(); err != nil {
|
||
|
_ = tx.Close()
|
||
|
return err
|
||
|
}
|
||
|
}
|
||
|
|
||
|
err := fn(tx)
|
||
|
_ = tx.Close()
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
// Close closes the transaction, releasing any open resources.
|
||
|
func (c *Tx) Close() error {
|
||
|
_ = c.Unwatch().Err()
|
||
|
return c.baseClient.Close()
|
||
|
}
|
||
|
|
||
|
// Watch marks the keys to be watched for conditional execution
|
||
|
// of a transaction.
|
||
|
func (c *Tx) Watch(keys ...string) *StatusCmd {
|
||
|
args := make([]interface{}, 1+len(keys))
|
||
|
args[0] = "watch"
|
||
|
for i, key := range keys {
|
||
|
args[1+i] = key
|
||
|
}
|
||
|
cmd := NewStatusCmd(args...)
|
||
|
c.Process(cmd)
|
||
|
return cmd
|
||
|
}
|
||
|
|
||
|
// Unwatch flushes all the previously watched keys for a transaction.
|
||
|
func (c *Tx) Unwatch(keys ...string) *StatusCmd {
|
||
|
args := make([]interface{}, 1+len(keys))
|
||
|
args[0] = "unwatch"
|
||
|
for i, key := range keys {
|
||
|
args[1+i] = key
|
||
|
}
|
||
|
cmd := NewStatusCmd(args...)
|
||
|
c.Process(cmd)
|
||
|
return cmd
|
||
|
}
|
||
|
|
||
|
// Pipeline creates a new pipeline. It is more convenient to use Pipelined.
|
||
|
func (c *Tx) Pipeline() Pipeliner {
|
||
|
pipe := Pipeline{
|
||
|
exec: c.processTxPipeline,
|
||
|
}
|
||
|
pipe.statefulCmdable.setProcessor(pipe.Process)
|
||
|
return &pipe
|
||
|
}
|
||
|
|
||
|
// Pipelined executes commands queued in the fn in a transaction.
|
||
|
//
|
||
|
// When using WATCH, EXEC will execute commands only if the watched keys
|
||
|
// were not modified, allowing for a check-and-set mechanism.
|
||
|
//
|
||
|
// Exec always returns list of commands. If transaction fails
|
||
|
// TxFailedErr is returned. Otherwise Exec returns an error of the first
|
||
|
// failed command or nil.
|
||
|
func (c *Tx) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||
|
return c.Pipeline().Pipelined(fn)
|
||
|
}
|
||
|
|
||
|
// TxPipelined is an alias for Pipelined.
|
||
|
func (c *Tx) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||
|
return c.Pipelined(fn)
|
||
|
}
|
||
|
|
||
|
// TxPipeline is an alias for Pipeline.
|
||
|
func (c *Tx) TxPipeline() Pipeliner {
|
||
|
return c.Pipeline()
|
||
|
}
|