Golang Command.Type Examples

Example #1

File: paxos_impl.go Project: postfix/gobby

//Use NOP to detect the gap slots [from, to)
func CatchUp(pn *paxosNode, from, to int) {
	pn.catchupMutex.Lock()
	pn.catchupCounter++
	pn.catchupMutex.Unlock()
	for index := from; index < to; index++ {
		i := 1
		c := new(command.Command)
		c.Type = command.NOP
		LOGV.Printf("node %d Try to catch up with slot %d\n", pn.nodeID, index)
		success, _, num := pn.DoReplicate(c, 0, index)
		for !success {
			LOGV.Printf("node %d last Paxos is not success, waiting to try again...\n", pn.nodeID)
			//TODO:maybe do not need to wait
			time.Sleep(time.Duration(rand.Int31n(1000)) * time.Millisecond)
			LOGV.Printf("node %d last Paxos is not success, try again...\n", pn.nodeID)
			//i++
			LOGV.Printf("node %d Try to catch up with slot %d\n", pn.nodeID, index)
			i = (num/pn.numNodes + 1)
			success, _, num = pn.DoReplicate(c, i, index)
		}
		LOGV.Printf("Catched up with slot %d\n", index)
	}
	pn.catchupMutex.Lock()
	pn.catchupCounter--
	pn.catchupMutex.Unlock()
}