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Extract commands info cache

This commit is contained in:
Vladimir Mihailenco
2018-03-06 14:50:48 +02:00
parent 0082bdcd4b
commit f13fc5381c
4 changed files with 50 additions and 47 deletions

View File

@ -1023,3 +1023,26 @@ func (cmd *CommandsInfoCmd) readReply(cn *pool.Conn) error {
cmd.val = v.(map[string]*CommandInfo)
return nil
}
//------------------------------------------------------------------------------
type cmdsInfoCache struct {
once internal.Once
cmds map[string]*CommandInfo
}
func newCmdsInfoCache() *cmdsInfoCache {
return &cmdsInfoCache{}
}
func (c *cmdsInfoCache) Do(fn func() (map[string]*CommandInfo, error)) (map[string]*CommandInfo, error) {
err := c.once.Do(func() error {
cmds, err := fn()
if err != nil {
return err
}
c.cmds = cmds
return nil
})
return c.cmds, err
}