114 lines
2.0 KiB
Go
114 lines
2.0 KiB
Go
package redis
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/go-redis/redis/internal/pool"
|
|
)
|
|
|
|
type pipelineExecer func([]Cmder) error
|
|
|
|
type Pipeliner interface {
|
|
StatefulCmdable
|
|
Process(cmd Cmder) error
|
|
Close() error
|
|
Discard() error
|
|
Exec() ([]Cmder, error)
|
|
}
|
|
|
|
var _ Pipeliner = (*Pipeline)(nil)
|
|
|
|
// Pipeline implements pipelining as described in
|
|
// http://redis.io/topics/pipelining. It's safe for concurrent use
|
|
// by multiple goroutines.
|
|
type Pipeline struct {
|
|
statefulCmdable
|
|
|
|
exec pipelineExecer
|
|
|
|
mu sync.Mutex
|
|
cmds []Cmder
|
|
closed bool
|
|
}
|
|
|
|
// Process queues the cmd for later execution.
|
|
func (c *Pipeline) Process(cmd Cmder) error {
|
|
c.mu.Lock()
|
|
c.cmds = append(c.cmds, cmd)
|
|
c.mu.Unlock()
|
|
return nil
|
|
}
|
|
|
|
// Close closes the pipeline, releasing any open resources.
|
|
func (c *Pipeline) Close() error {
|
|
c.mu.Lock()
|
|
c.discard()
|
|
c.closed = true
|
|
c.mu.Unlock()
|
|
return nil
|
|
}
|
|
|
|
// Discard resets the pipeline and discards queued commands.
|
|
func (c *Pipeline) Discard() error {
|
|
c.mu.Lock()
|
|
err := c.discard()
|
|
c.mu.Unlock()
|
|
return err
|
|
}
|
|
|
|
func (c *Pipeline) discard() error {
|
|
if c.closed {
|
|
return pool.ErrClosed
|
|
}
|
|
c.cmds = c.cmds[:0]
|
|
return nil
|
|
}
|
|
|
|
// Exec executes all previously queued commands using one
|
|
// client-server roundtrip.
|
|
//
|
|
// Exec always returns list of commands and error of the first failed
|
|
// command if any.
|
|
func (c *Pipeline) Exec() ([]Cmder, error) {
|
|
c.mu.Lock()
|
|
defer c.mu.Unlock()
|
|
|
|
if c.closed {
|
|
return nil, pool.ErrClosed
|
|
}
|
|
|
|
if len(c.cmds) == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
cmds := c.cmds
|
|
c.cmds = nil
|
|
|
|
return cmds, c.exec(cmds)
|
|
}
|
|
|
|
func (c *Pipeline) pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
|
if err := fn(c); err != nil {
|
|
return nil, err
|
|
}
|
|
cmds, err := c.Exec()
|
|
_ = c.Close()
|
|
return cmds, err
|
|
}
|
|
|
|
func (c *Pipeline) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
|
return c.pipelined(fn)
|
|
}
|
|
|
|
func (c *Pipeline) Pipeline() Pipeliner {
|
|
return c
|
|
}
|
|
|
|
func (c *Pipeline) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
|
return c.pipelined(fn)
|
|
}
|
|
|
|
func (c *Pipeline) TxPipeline() Pipeliner {
|
|
return c
|
|
}
|