github.com/cranelv/ethereum_mpc@v0.0.0-20191031014521-23aeb1415092/consensus_pbft/helper/handler.go (about)

     1  /*
     2  Copyright IBM Corp. 2016 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 helper
    18  
    19  import (
    20  	"fmt"
    21  
    22  
    23  	"github.com/ethereum/go-ethereum/consensus_pbft/util"
    24  	"github.com/ethereum/go-ethereum/consensus_pbft/peer"
    25  	"github.com/ethereum/go-ethereum/log"
    26  	"github.com/ethereum/go-ethereum/consensus_pbft/message"
    27  )
    28  
    29  
    30  
    31  const (
    32  	// DefaultConsensusQueueSize value of 1000
    33  	DefaultConsensusQueueSize int = 1000
    34  )
    35  
    36  // ConsensusHandler handles consensus messages.
    37  // It also implements the Stack.
    38  type ConsensusHandler struct {
    39  	peer.MessageHandler
    40  	consenterChan chan *util.Message
    41  	coordinator   peer.MessageHandlerCoordinator
    42  }
    43  
    44  // NewConsensusHandler constructs a new MessageHandler for the plugin.
    45  // Is instance of peer.HandlerFactory
    46  func NewConsensusHandler(coord peer.MessageHandlerCoordinator,
    47  	stream peer.ChatStream, initiatedStream bool) (peer.MessageHandler, error) {
    48  	/*
    49  	peerHandler, err := peer.NewPeerHandler(coord, stream, initiatedStream)
    50  	if err != nil {
    51  		return nil, fmt.Errorf("Error creating PeerHandler: %s", err)
    52  	}
    53  	*/
    54  	handler := &ConsensusHandler{
    55  //		MessageHandler: peerHandler,
    56  		coordinator:    coord,
    57  	}
    58  
    59  	consensusQueueSize := 100//viper.GetInt("peer.validator.consensus.buffersize")
    60  
    61  	if consensusQueueSize <= 0 {
    62  		log.Error("peer.validator.consensus.buffersize is set to %d, but this must be a positive integer, defaulting to %d", consensusQueueSize, DefaultConsensusQueueSize)
    63  		consensusQueueSize = DefaultConsensusQueueSize
    64  	}
    65  
    66  	handler.consenterChan = make(chan *util.Message, consensusQueueSize)
    67  	getEngineImpl().consensusFan.AddFaninChannel(handler.consenterChan)
    68  
    69  	return handler, nil
    70  }
    71  
    72  // HandleMessage handles the incoming Fabric messages for the Peer
    73  func (handler *ConsensusHandler) HandleMessage(msg *message.Message) error {
    74  	if msg.Type == message.Message_CONSENSUS {
    75  		senderPE, _ := handler.To()
    76  		select {
    77  		case handler.consenterChan <- &util.Message{
    78  			Msg:    msg,
    79  			Sender: senderPE.GetPeerId(),
    80  		}:
    81  			return nil
    82  		default:
    83  			err := fmt.Errorf("Message channel for %v full, rejecting", senderPE.GetPeerId())
    84  			log.Error("Failed to queue consensus message because: %v", err)
    85  			return err
    86  		}
    87  	}
    88  
    89  //	if logger.IsEnabledFor(logging.DEBUG) {
    90  		log.Debug("Did not handle message of type %s, passing on to next MessageHandler", msg.Type)
    91  //	}
    92  	return handler.MessageHandler.HandleMessage(msg)
    93  }