// scanCluster is like Scan except it operates over a whole cluster. Unlike Scan
// it only works with SCAN and as such only takes in a pattern string.
func scanCluster(c *cluster.Cluster, ch chan string, pattern string) error {
defer close(ch)
clients, err := c.GetEvery()
if err != nil {
return err
}
for _, client := range clients {
defer c.Put(client)
}
for _, client := range clients {
cch := make(chan string)
var err error
go func() {
err = scanSingle(client, cch, "SCAN", "", pattern)
}()
for key := range cch {
ch <- key
}
if err != nil {
return err
}
}
return nil
}
func doGetSet(c *cluster.Cluster, key string) {
if err := c.Cmd("GET", key).Err; err != nil {
log.Printf("GET %s -> %s", key, err)
}
val := randString()
if err := c.Cmd("SET", key, val).Err; err != nil {
log.Printf("SET %s %s -> %s", key, val, err)
}
}