github.com/leonlxy/hyperledger@v1.0.0-alpha.0.20170427033203-34922035d248/core/deliverservice/mocks/orderer.go (about)

     1  /*
     2  Copyright IBM Corp. 2017 All Rights Reserved.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8                   http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package mocks
    18  
    19  import (
    20  	"fmt"
    21  	"net"
    22  	"sync/atomic"
    23  	"testing"
    24  
    25  	"github.com/golang/protobuf/proto"
    26  	"github.com/hyperledger/fabric/protos/common"
    27  	"github.com/hyperledger/fabric/protos/orderer"
    28  	"github.com/stretchr/testify/assert"
    29  	"google.golang.org/grpc"
    30  )
    31  
    32  type Orderer struct {
    33  	net.Listener
    34  	*grpc.Server
    35  	nextExpectedSeek uint64
    36  	t                *testing.T
    37  	blockChannel     chan uint64
    38  	stopChan         chan struct{}
    39  }
    40  
    41  func NewOrderer(port int, t *testing.T) *Orderer {
    42  	srv := grpc.NewServer()
    43  	lsnr, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", port))
    44  	if err != nil {
    45  		panic(err)
    46  	}
    47  	go srv.Serve(lsnr)
    48  	o := &Orderer{Server: srv,
    49  		Listener:         lsnr,
    50  		t:                t,
    51  		nextExpectedSeek: uint64(1),
    52  		blockChannel:     make(chan uint64, 1),
    53  		stopChan:         make(chan struct{}, 1),
    54  	}
    55  	orderer.RegisterAtomicBroadcastServer(srv, o)
    56  	return o
    57  }
    58  
    59  func (o *Orderer) Shutdown() {
    60  	o.stopChan <- struct{}{}
    61  	o.Server.Stop()
    62  	o.Listener.Close()
    63  }
    64  
    65  func (*Orderer) Broadcast(orderer.AtomicBroadcast_BroadcastServer) error {
    66  	panic("Should not have ben called")
    67  }
    68  
    69  func (o *Orderer) SetNextExpectedSeek(seq uint64) {
    70  	atomic.StoreUint64(&o.nextExpectedSeek, uint64(seq))
    71  }
    72  
    73  func (o *Orderer) SendBlock(seq uint64) {
    74  	o.blockChannel <- seq
    75  }
    76  
    77  func (o *Orderer) Deliver(stream orderer.AtomicBroadcast_DeliverServer) error {
    78  	envlp, err := stream.Recv()
    79  	if err != nil {
    80  		return nil
    81  	}
    82  	payload := &common.Payload{}
    83  	proto.Unmarshal(envlp.Payload, payload)
    84  	seekInfo := &orderer.SeekInfo{}
    85  	proto.Unmarshal(payload.Data, seekInfo)
    86  	assert.True(o.t, seekInfo.Behavior == orderer.SeekInfo_BLOCK_UNTIL_READY)
    87  	assert.Equal(o.t, atomic.LoadUint64(&o.nextExpectedSeek), seekInfo.Start.GetSpecified().Number)
    88  
    89  	for {
    90  		select {
    91  		case <-o.stopChan:
    92  			return nil
    93  		case seq := <-o.blockChannel:
    94  			o.sendBlock(stream, seq)
    95  		}
    96  	}
    97  }
    98  
    99  func (o *Orderer) sendBlock(stream orderer.AtomicBroadcast_DeliverServer, seq uint64) {
   100  	block := &common.Block{
   101  		Header: &common.BlockHeader{
   102  			Number: seq,
   103  		},
   104  	}
   105  	stream.Send(&orderer.DeliverResponse{
   106  		Type: &orderer.DeliverResponse_Block{Block: block},
   107  	})
   108  }