// 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
}
}
}
}
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)
}
}
func broadcastWrite(destinationView *view.View, writeMsg RegisterMsg, resultChan chan RegisterMsg) {
for _, process := range destinationView.GetMembers() {
go sendWrite(process, &writeMsg, resultChan)
}
}
func broadcastRead(destinationView *view.View, viewRef view.ViewRef, resultChan chan RegisterMsg) {
for _, process := range destinationView.GetMembers() {
go sendRead(process, viewRef, resultChan)
}
}