2023-10-27 17:41:45 +08:00
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package rdm
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import (
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"fmt"
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"mayfly-go/internal/common/consts"
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2023-10-30 17:34:56 +08:00
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"mayfly-go/internal/machine/mcm"
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2023-10-27 17:41:45 +08:00
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"mayfly-go/pkg/cache"
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"mayfly-go/pkg/logx"
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"sync"
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"time"
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)
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// redis客户端连接缓存,指定时间内没有访问则会被关闭
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var connCache = cache.NewTimedCache(consts.RedisConnExpireTime, 5*time.Second).
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WithUpdateAccessTime(true).
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OnEvicted(func(key any, value any) {
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logx.Info(fmt.Sprintf("删除redis连接缓存 id = %s", key))
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value.(*RedisConn).Close()
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})
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func init() {
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2023-10-30 17:34:56 +08:00
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mcm.AddCheckSshTunnelMachineUseFunc(func(machineId int) bool {
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2023-10-27 17:41:45 +08:00
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// 遍历所有redis连接实例,若存在redis实例使用该ssh隧道机器,则返回true,表示还在使用中...
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items := connCache.Items()
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for _, v := range items {
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if v.Value.(*RedisConn).Info.SshTunnelMachineId == machineId {
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return true
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}
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}
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return false
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})
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}
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var mutex sync.Mutex
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// 从缓存中获取redis连接信息, 若缓存中不存在则会使用回调函数获取redisInfo进行连接并缓存
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func GetRedisConn(redisId uint64, db int, getRedisInfo func() (*RedisInfo, error)) (*RedisConn, error) {
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connId := getConnId(redisId, db)
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// connId不为空,则为需要缓存
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needCache := connId != ""
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if needCache {
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load, ok := connCache.Get(connId)
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if ok {
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return load.(*RedisConn), nil
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}
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}
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mutex.Lock()
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defer mutex.Unlock()
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// 若缓存中不存在,则从回调函数中获取RedisInfo
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ri, err := getRedisInfo()
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if err != nil {
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return nil, err
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}
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// 连接数据库
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rc, err := ri.Conn()
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if err != nil {
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return nil, err
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}
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if needCache {
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connCache.Put(connId, rc)
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}
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return rc, nil
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}
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// 移除redis连接缓存并关闭redis连接
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func CloseConn(id uint64, db int) {
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connCache.Delete(getConnId(id, db))
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}
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