func (client *Client) invokeChanInternal(
leverURL *core.LeverURL, args ...interface{}) (stream Stream, err error) {
if !IsChanMethod(leverURL.Method) {
return nil, fmt.Errorf(
"Use Invoke / InvokeURL for non-streaming methods")
}
if leverURL.Environment == "" && OwnEnvironment == "" {
return nil, fmt.Errorf(
"Environment not specified and cannot be deduced")
}
if leverURL.Environment == "" {
leverURL.Environment = OwnEnvironment
}
var dialTo string
if client.ForceHost != "" {
dialTo = client.ForceHost
} else {
if (core.IsInternalEnvironment(leverURL.Environment) ||
leverURL.Environment == OwnEnvironment) &&
internalRPCGateway != "" {
dialTo = internalRPCGateway
} else {
dialTo = leverURL.Environment
}
}
conn, err := client.conns.Dial(dialTo)
if err != nil {
return nil, err
}
rpc := &core.RPC{}
if len(args) == 1 {
byteArgs, ok := args[0].([]byte)
if ok {
// Byte args case.
rpc.ArgsOneof = &core.RPC_ByteArgs{
ByteArgs: byteArgs,
}
}
}
if rpc.ArgsOneof == nil {
// Non-byte args case.
var encdArgs *core.JSONArray
encdArgs, err = encodeArgs(args)
if err != nil {
return nil, err
}
rpc.ArgsOneof = &core.RPC_Args{
Args: encdArgs,
}
}
grpcStream, err := core.SendStreamingLeverRPC(
conn, context.Background(), leverURL)
if err != nil {
return nil, err
}
err = grpcStream.Send(&core.StreamMessage{
MessageOneof: &core.StreamMessage_Rpc{
Rpc: rpc,
},
})
if err != nil {
grpcStream.CloseSend()
return nil, err
}
// First message received must be empty.
fstMsg, err := grpcStream.Recv()
if err != nil {
return nil, err
}
if fstMsg.GetMessageOneof() != nil {
return nil, fmt.Errorf("First server message needs to be empty")
}
return newClientStream(grpcStream), nil
}
func (client *Client) invokeInternal(
replyObj interface{}, leverURL *core.LeverURL,
args ...interface{}) (err error) {
if IsChanMethod(leverURL.Method) {
return fmt.Errorf(
"Use InvokeChan / InvokeChanURL for streaming methods")
}
if leverURL.Environment == "" && OwnEnvironment == "" {
return fmt.Errorf(
"Environment not specified and cannot be deduced")
}
if leverURL.Environment == "" {
leverURL.Environment = OwnEnvironment
}
var dialTo string
if client.ForceHost != "" {
dialTo = client.ForceHost
} else {
if (core.IsInternalEnvironment(leverURL.Environment) ||
leverURL.Environment == OwnEnvironment) &&
internalRPCGateway != "" {
dialTo = internalRPCGateway
} else {
dialTo = leverURL.Environment
}
}
conn, err := client.conns.Dial(dialTo)
if err != nil {
return err
}
rpc := &core.RPC{}
if len(args) == 1 {
byteArgs, ok := args[0].([]byte)
if ok {
// Byte args case.
rpc.ArgsOneof = &core.RPC_ByteArgs{
ByteArgs: byteArgs,
}
}
}
if rpc.ArgsOneof == nil {
// Non-byte args case.
var encdArgs *core.JSONArray
encdArgs, err = encodeArgs(args)
if err != nil {
return err
}
rpc.ArgsOneof = &core.RPC_Args{
Args: encdArgs,
}
}
reply, err := core.SendLeverRPC(
conn, context.Background(), leverURL, rpc)
if err != nil {
return err
}
if reply.GetResultOneof() == nil {
return fmt.Errorf("Received nil result oneof")
}
switch result := reply.GetResultOneof().(type) {
case *core.RPCReply_ByteResult:
byteReplyObj, ok := replyObj.(*[]byte)
if !ok {
return fmt.Errorf(
"replyObj needs to be type *[]byte when RPC returns bytes")
}
*byteReplyObj = result.ByteResult
return nil
case *core.RPCReply_ByteError:
return &RemoteByteError{Err: result.ByteError}
case *core.RPCReply_Result:
return decodeArgAsValue(result.Result, replyObj)
case *core.RPCReply_Error:
return &RemoteError{Err: buildDataForJSON(result.Error)}
default:
return fmt.Errorf("Invalid type")
}
}