mockccstream.go

/*
Copyright IBM Corp. 2017 All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

		 http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package peer

import (
	"fmt"
	"sync"
	"time"

	pb "github.com/mcc-github/blockchain-protos-go/peer"
)





type MockResponseSet struct {
	
	
	DoneFunc func(int, error)

	
	
	ErrorFunc func(int, error)

	
	
	Responses []*MockResponse
}



type MockResponse struct {
	RecvMsg *pb.ChaincodeMessage
	RespMsg interface{}
}




type MockCCComm struct {
	name        string
	bailOnError bool
	keepAlive   *pb.ChaincodeMessage
	recvStream  chan *pb.ChaincodeMessage
	sendStream  chan *pb.ChaincodeMessage
	respIndex   int
	respLock    sync.Mutex
	respSet     *MockResponseSet
	pong        bool
	skipClose   bool
}

func (s *MockCCComm) SetName(newname string) {
	s.name = newname
}


func (s *MockCCComm) Send(msg *pb.ChaincodeMessage) error {
	s.sendStream <- msg
	return nil
}


func (s *MockCCComm) Recv() (*pb.ChaincodeMessage, error) {
	msg := <-s.recvStream
	return msg, nil
}


func (s *MockCCComm) CloseSend() error {
	return nil
}


func (s *MockCCComm) GetRecvStream() chan *pb.ChaincodeMessage {
	return s.recvStream
}


func (s *MockCCComm) GetSendStream() chan *pb.ChaincodeMessage {
	return s.sendStream
}


func (s *MockCCComm) Quit() {
	if !s.skipClose {
		close(s.recvStream)
		close(s.sendStream)
	}
}


func (s *MockCCComm) SetBailOnError(b bool) {
	s.bailOnError = b
}


func (s *MockCCComm) SetPong(val bool) {
	s.pong = val
}


func (s *MockCCComm) SetKeepAlive(ka *pb.ChaincodeMessage) {
	s.keepAlive = ka
}


func (s *MockCCComm) SetResponses(respSet *MockResponseSet) {
	s.respLock.Lock()
	s.respSet = respSet
	s.respIndex = 0
	s.respLock.Unlock()
}


func (s *MockCCComm) ka(done <-chan struct{}) {
	for {
		if s.keepAlive == nil {
			return
		}
		s.Send(s.keepAlive)
		select {
		case <-time.After(10 * time.Millisecond):
		case <-done:
			return
		}
	}
}


func (s *MockCCComm) Run(done <-chan struct{}) error {
	
	go s.ka(done)
	defer s.Quit()

	for {
		msg, err := s.Recv()

		
		if msg == nil {
			return err
		}

		if err != nil {
			return err
		}

		if err = s.respond(msg); err != nil {
			if s.bailOnError {
				return err
			}
		}
	}
}

func (s *MockCCComm) respond(msg *pb.ChaincodeMessage) error {
	if msg != nil && msg.Type == pb.ChaincodeMessage_KEEPALIVE {
		
		if s.pong {
			return s.Send(msg)
		}
		return nil
	}

	s.respLock.Lock()
	defer s.respLock.Unlock()

	var err error
	if s.respIndex < len(s.respSet.Responses) {
		mockResp := s.respSet.Responses[s.respIndex]
		if mockResp.RecvMsg != nil {
			if msg.Type != mockResp.RecvMsg.Type {
				if s.respSet.ErrorFunc != nil {
					s.respSet.ErrorFunc(s.respIndex, fmt.Errorf("Invalid message expected %d received %d", int32(mockResp.RecvMsg.Type), int32(msg.Type)))
					s.respIndex = s.respIndex + 1
					return nil
				}
			}
		}

		if mockResp.RespMsg != nil {
			var ccMsg *pb.ChaincodeMessage
			if ccMsg, _ = mockResp.RespMsg.(*pb.ChaincodeMessage); ccMsg == nil {
				if ccMsgFunc, ok := mockResp.RespMsg.(func(*pb.ChaincodeMessage) *pb.ChaincodeMessage); ok && ccMsgFunc != nil {
					ccMsg = ccMsgFunc(msg)
				}
			}

			if ccMsg == nil {
				panic("----no pb.ChaincodeMessage---")
			}
			err = s.Send(ccMsg)
		}

		s.respIndex = s.respIndex + 1

		if s.respIndex == len(s.respSet.Responses) {
			if s.respSet.DoneFunc != nil {
				s.respSet.DoneFunc(s.respIndex, nil)
			}
		}
	}
	return err
}