mirror of https://github.com/go-redis/redis.git
96 lines
1.6 KiB
Go
96 lines
1.6 KiB
Go
package redis
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import (
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"io"
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"log"
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"os"
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"sync"
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"github.com/vmihailenco/bufreader"
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)
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type Conn struct {
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RW io.ReadWriter
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Rd *bufreader.Reader
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}
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func NewConn(rw io.ReadWriter) *Conn {
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return &Conn{
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RW: rw,
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Rd: bufreader.NewSizedReader(8024),
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}
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}
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type ConnPool struct {
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Logger *log.Logger
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cond *sync.Cond
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conns []*Conn
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OpenConn OpenConnFunc
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CloseConn CloseConnFunc
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cap, MaxCap int64
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}
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func NewConnPool(openConn OpenConnFunc, closeConn CloseConnFunc, maxCap int64) *ConnPool {
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logger := log.New(
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os.Stdout,
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"redis.connpool: ",
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log.Ldate|log.Ltime|log.Lshortfile,
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)
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return &ConnPool{
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cond: sync.NewCond(&sync.Mutex{}),
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Logger: logger,
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conns: make([]*Conn, 0),
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OpenConn: openConn,
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CloseConn: closeConn,
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MaxCap: maxCap,
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}
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}
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func (p *ConnPool) Get() (*Conn, bool, error) {
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p.cond.L.Lock()
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defer p.cond.L.Unlock()
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for len(p.conns) == 0 && p.cap >= p.MaxCap {
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p.cond.Wait()
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}
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if len(p.conns) == 0 {
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rw, err := p.OpenConn()
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if err != nil {
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return nil, false, err
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}
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p.cap++
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return NewConn(rw), true, nil
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}
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last := len(p.conns) - 1
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conn := p.conns[last]
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p.conns[last] = nil
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p.conns = p.conns[:last]
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return conn, false, nil
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}
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func (p *ConnPool) Add(conn *Conn) {
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p.cond.L.Lock()
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defer p.cond.L.Unlock()
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p.conns = append(p.conns, conn)
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p.cond.Signal()
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}
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func (p *ConnPool) Remove(conn *Conn) {
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p.cond.L.Lock()
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p.cap--
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p.cond.Signal()
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p.cond.L.Unlock()
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if p.CloseConn != nil && conn != nil {
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p.CloseConn(conn.RW)
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}
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}
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func (p *ConnPool) Len() int {
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return len(p.conns)
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}
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