// grpcTransportFactory is the default TransportFactory, using GRPC.
func grpcTransportFactory(
opts SendOptions,
rpcContext *rpc.Context,
replicas ReplicaSlice,
args roachpb.BatchRequest,
) (Transport, error) {
clients := make([]batchClient, 0, len(replicas))
for _, replica := range replicas {
conn, err := rpcContext.GRPCDial(replica.NodeDesc.Address.String())
if err != nil {
return nil, err
}
argsCopy := args
argsCopy.Replica = replica.ReplicaDescriptor
remoteAddr := replica.NodeDesc.Address.String()
clients = append(clients, batchClient{
remoteAddr: remoteAddr,
conn: conn,
client: roachpb.NewInternalClient(conn),
args: argsCopy,
healthy: rpcContext.IsConnHealthy(remoteAddr),
})
}
// Put known-unhealthy clients last.
splitHealthy(clients)
return &grpcTransport{
opts: opts,
rpcContext: rpcContext,
orderedClients: clients,
}, nil
}
