Exemple #1
0
// Broadcast receives a stream of messages from a client for ordering
func (b *BackendAB) Broadcast(srv ab.AtomicBroadcast_BroadcastServer) error {
	for {
		envelope, err := srv.Recv()
		if err != nil {
			return err
		}

		if envelope.Payload == nil {
			err = srv.Send(&ab.BroadcastResponse{Status: cb.Status_BAD_REQUEST})
			if err != nil {
				return err
			}
		}
		req, err := proto.Marshal(envelope)
		if err != nil {
			panic(err)
		}
		b.backend.enqueueRequest(req)
		err = srv.Send(&ab.BroadcastResponse{Status: cb.Status_SUCCESS})
		if err != nil {
			return err
		}
	}
}
Exemple #2
0
func (b *broadcaster) queueEnvelopes(srv ab.AtomicBroadcast_BroadcastServer) error {

	for {
		select {
		case <-b.exitChan:
			return nil
		default:
		}
		msg, err := srv.Recv()
		if err != nil {
			return err
		}

		payload := &cb.Payload{}
		err = proto.Unmarshal(msg.Payload, payload)
		if payload.Header == nil || payload.Header.ChainHeader == nil || payload.Header.ChainHeader.ChainID == "" {
			logger.Debugf("Received malformed message, dropping connection")
			return srv.Send(&ab.BroadcastResponse{Status: cb.Status_BAD_REQUEST})
		}

		support, ok := b.bs.sm.GetChain(payload.Header.ChainHeader.ChainID)
		if !ok {
			// Chain not found, maybe create one?
			if payload.Header.ChainHeader.Type != int32(cb.HeaderType_CONFIGURATION_TRANSACTION) {
				err = srv.Send(&ab.BroadcastResponse{Status: cb.Status_NOT_FOUND})
			} else {
				logger.Debugf("Proposing new chain")
				err = srv.Send(&ab.BroadcastResponse{Status: b.bs.sm.ProposeChain(msg)})
			}
		} else {
			// Normal transaction for existing chain
			_, filterErr := support.Filters().Apply(msg)

			if filterErr != nil {
				logger.Debugf("Rejecting broadcast message")
				err = srv.Send(&ab.BroadcastResponse{Status: cb.Status_BAD_REQUEST})
			} else {
				select {
				case b.queue <- &msgAndSupport{msg: msg, support: support}:
					err = srv.Send(&ab.BroadcastResponse{Status: cb.Status_SUCCESS})
				default:
					err = srv.Send(&ab.BroadcastResponse{Status: cb.Status_SERVICE_UNAVAILABLE})
				}
			}
		}

		if err != nil {
			return err
		}
	}
}