mirror of
https://gitee.com/johng/gf.git
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178 lines
5.8 KiB
Go
178 lines
5.8 KiB
Go
// Copyright 2017 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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// Package gredis provides client for redis server.
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//
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// Redis客户端.
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// Redis中文手册文档请参考:http://redisdoc.com/ , Redis官方命令请参考:https://redis.io/commands
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package gredis
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import (
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"fmt"
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"github.com/gogf/gf/g/container/gmap"
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"github.com/gogf/gf/third/github.com/gomodule/redigo/redis"
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"time"
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)
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const (
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gDEFAULT_POOL_IDLE_TIMEOUT = 60 * time.Second
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gDEFAULT_POOL_MAX_LIFE_TIME = 60 * time.Second
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)
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// Redis客户端(管理连接池)
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type Redis struct {
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pool *redis.Pool
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config Config
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}
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// Redis连接对象(连接池中的单个连接)
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type Conn redis.Conn
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// Redis服务端但节点连接配置信息
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type Config struct {
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Host string // 地址
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Port int // 端口
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Db int // 数据库
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Pass string // 授权密码
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MaxIdle int // 最大允许空闲存在的连接数(默认为0表示不存在闲置连接)
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MaxActive int // 最大连接数量限制(默认为0表示不限制)
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IdleTimeout time.Duration // 连接最大空闲时间(默认为60秒,不允许设置为0)
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MaxConnLifetime time.Duration // 连接最长存活时间(默认为60秒,不允许设置为0)
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}
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// Redis链接池统计信息
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type PoolStats struct {
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redis.PoolStats
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}
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// 连接池map
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var pools = gmap.NewStringInterfaceMap()
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// New creates a redis client object with given configuration.
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// Redis client maintains a connection pool automatically.
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//
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// 创建redis操作对象.
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func New(config Config) *Redis {
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if config.IdleTimeout == 0 {
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config.IdleTimeout = gDEFAULT_POOL_IDLE_TIMEOUT
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}
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if config.MaxConnLifetime == 0 {
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config.MaxConnLifetime = gDEFAULT_POOL_MAX_LIFE_TIME
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}
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return &Redis{
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config : config,
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pool : pools.GetOrSetFuncLock(fmt.Sprintf("%v", config), func() interface{} {
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return &redis.Pool {
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IdleTimeout : config.IdleTimeout,
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MaxConnLifetime : config.MaxConnLifetime,
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Dial : func() (redis.Conn, error) {
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c, err := redis.Dial("tcp", fmt.Sprintf("%s:%d", config.Host, config.Port))
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if err != nil {
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return nil, err
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}
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// 密码设置
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if len(config.Pass) > 0 {
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if _, err := c.Do("AUTH", config.Pass); err != nil {
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return nil, err
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}
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}
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// 数据库设置
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if _, err := c.Do("SELECT", config.Db); err != nil {
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return nil, err
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}
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return c, nil
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},
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// 在被应用从连接池中获取出来之后,用以测试连接是否可用,
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// 如果返回error那么关闭该连接对象重新创建新的连接。
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TestOnBorrow: func(c redis.Conn, t time.Time) error {
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_, err := c.Do("PING")
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return err
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},
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}
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}).(*redis.Pool),
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}
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}
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// Close closes the redis connection pool,
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// it will release all connections reserved by this pool.
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//
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// 关闭redis管理对象,将会关闭底层的连接池。
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func (r *Redis) Close() error {
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pools.Remove(fmt.Sprintf("%v", r.config))
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return r.pool.Close()
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}
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// See GetConn.
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func (r *Redis) Conn() Conn {
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return r.GetConn()
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}
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// GetConn returns a raw connection object,
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// which expose more methods communication with server.
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// **You should call Close function manually if you do not use this connection any further.**
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//
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// 获得一个原生的redis连接对象,用于自定义连接操作,
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// 但是需要注意的是如果不再使用该连接对象时,需要手动Close连接,否则会造成连接数超限。
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func (r *Redis) GetConn() Conn {
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return r.pool.Get().(Conn)
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}
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// SetMaxIdle sets the MaxIdle attribute of the connection pool.
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//
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// 设置属性 - MaxIdle
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func (r *Redis) SetMaxIdle(value int) {
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r.pool.MaxIdle = value
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}
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// SetMaxIdle sets the MaxActive attribute of the connection pool.
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//
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// 设置属性 - MaxActive
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func (r *Redis) SetMaxActive(value int) {
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r.pool.MaxActive = value
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}
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// SetMaxIdle sets the IdleTimeout attribute of the connection pool.
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//
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// 设置属性 - IdleTimeout
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func (r *Redis) SetIdleTimeout(value time.Duration) {
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r.pool.IdleTimeout = value
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}
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// SetMaxIdle sets the MaxConnLifetime attribute of the connection pool.
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//
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// 设置属性 - MaxConnLifetime
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func (r *Redis) SetMaxConnLifetime(value time.Duration) {
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r.pool.MaxConnLifetime = value
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}
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// Stats returns pool's statistics.
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//
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// 获取当前连接池统计信息。
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func (r *Redis) Stats() *PoolStats {
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return &PoolStats{r.pool.Stats()}
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}
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// Do sends a command to the server and returns the received reply.
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// Do automatically get a connection from pool, and close it when reply received.
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//
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// 执行同步命令,自动从连接池中获取连接,使用完毕后关闭连接(丢回连接池),开发者不用自行Close.
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func (r *Redis) Do(command string, args ...interface{}) (interface{}, error) {
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conn := r.pool.Get()
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defer conn.Close()
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return conn.Do(command, args...)
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}
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// Deprecated.
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// Send writes the command to the client's output buffer.
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//
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// 执行异步命令 - Send
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func (r *Redis) Send(command string, args ...interface{}) error {
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conn := r.pool.Get()
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defer conn.Close()
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return conn.Send(command, args...)
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}
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