// 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
}
}
}
}
