Example #1
0
// BroadcastRPCRequest invokes serviceMethod at all members of the
// destinationView with arg. It returns an error if it fails to receive
// a response from a quorum of processes.
func BroadcastRPCRequest(destinationView *view.View, serviceMethod string, arg interface{}) error {
	errorChan := make(chan error, destinationView.NumberOfMembers())

	for _, process := range destinationView.GetMembers() {
		go func(process view.Process) {
			var discardResult struct{}
			errorChan <- SendRPCRequest(process, serviceMethod, arg, &discardResult)
		}(process)
	}

	failedTotal := 0
	successTotal := 0
	for {
		err := <-errorChan

		if err != nil {
			failedTotal++
			if failedTotal > destinationView.NumberOfToleratedFaults() {
				log.Printf("WARN: BroadcastRPCRequest failed to send %v to a quorum\n", serviceMethod)
				return err
			}
		} else {
			successTotal++
			if successTotal == destinationView.QuorumSize() {
				return nil
			}
		}
	}
}
Example #2
0
func broadcastAcceptRequest(destinationView *view.View, proposal Proposal, resultChan chan Proposal) {
	for _, process := range destinationView.GetMembers() {
		go func(process view.Process) {
			var result Proposal
			err := comm.SendRPCRequest(process, "ConsensusRequest.Accept", proposal, &result)
			if err != nil {
				resultChan <- Proposal{Err: err}
				return
			}
			resultChan <- result
		}(process)
	}
}
Example #3
0
func broadcastWrite(destinationView *view.View, writeMsg RegisterMsg, resultChan chan RegisterMsg) {
	for _, process := range destinationView.GetMembers() {
		go sendWrite(process, &writeMsg, resultChan)
	}
}
Example #4
0
func broadcastRead(destinationView *view.View, viewRef view.ViewRef, resultChan chan RegisterMsg) {
	for _, process := range destinationView.GetMembers() {
		go sendRead(process, viewRef, resultChan)
	}
}