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mayfly-go/server/internal/redis/rdm/conn_cache.go
2023-10-27 17:41:45 +08:00

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package rdm
import (
"fmt"
"mayfly-go/internal/common/consts"
"mayfly-go/internal/machine/infrastructure/machine"
"mayfly-go/pkg/cache"
"mayfly-go/pkg/logx"
"sync"
"time"
)
// redis客户端连接缓存指定时间内没有访问则会被关闭
var connCache = cache.NewTimedCache(consts.RedisConnExpireTime, 5*time.Second).
WithUpdateAccessTime(true).
OnEvicted(func(key any, value any) {
logx.Info(fmt.Sprintf("删除redis连接缓存 id = %s", key))
value.(*RedisConn).Close()
})
func init() {
machine.AddCheckSshTunnelMachineUseFunc(func(machineId int) bool {
// 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...
items := connCache.Items()
for _, v := range items {
if v.Value.(*RedisConn).Info.SshTunnelMachineId == machineId {
return true
}
}
return false
})
}
var mutex sync.Mutex
// 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
func GetRedisConn(redisId uint64, db int, getRedisInfo func() (*RedisInfo, error)) (*RedisConn, error) {
connId := getConnId(redisId, db)
// connId不为空则为需要缓存
needCache := connId != ""
if needCache {
load, ok := connCache.Get(connId)
if ok {
return load.(*RedisConn), nil
}
}
mutex.Lock()
defer mutex.Unlock()
// 若缓存中不存在则从回调函数中获取RedisInfo
ri, err := getRedisInfo()
if err != nil {
return nil, err
}
// 连接数据库
rc, err := ri.Conn()
if err != nil {
return nil, err
}
if needCache {
connCache.Put(connId, rc)
}
return rc, nil
}
// 移除redis连接缓存并关闭redis连接
func CloseConn(id uint64, db int) {
connCache.Delete(getConnId(id, db))
}