github.com/adnan-c/fabric_e2e_couchdb@v0.6.1-preview.0.20170228180935-21ce6b23cf91/events/producer/producer.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 producer
    18  
    19  import (
    20  	"fmt"
    21  	"io"
    22  	"time"
    23  
    24  	pb "github.com/hyperledger/fabric/protos/peer"
    25  	"github.com/op/go-logging"
    26  )
    27  
    28  const defaultTimeout = time.Second * 3
    29  
    30  var producerLogger = logging.MustGetLogger("eventhub_producer")
    31  
    32  // EventsServer implementation of the Peer service
    33  type EventsServer struct {
    34  }
    35  
    36  //singleton - if we want to create multiple servers, we need to subsume events.gEventConsumers into EventsServer
    37  var globalEventsServer *EventsServer
    38  
    39  // NewEventsServer returns a EventsServer
    40  func NewEventsServer(bufferSize uint, timeout int) *EventsServer {
    41  	if globalEventsServer != nil {
    42  		panic("Cannot create multiple event hub servers")
    43  	}
    44  	globalEventsServer = new(EventsServer)
    45  	initializeEvents(bufferSize, timeout)
    46  	//initializeCCEventProcessor(bufferSize, timeout)
    47  	return globalEventsServer
    48  }
    49  
    50  // Chat implementation of the the Chat bidi streaming RPC function
    51  func (p *EventsServer) Chat(stream pb.Events_ChatServer) error {
    52  	handler, err := newEventHandler(stream)
    53  	if err != nil {
    54  		return fmt.Errorf("Error creating handler during handleChat initiation: %s", err)
    55  	}
    56  	defer handler.Stop()
    57  	for {
    58  		in, err := stream.Recv()
    59  		if err == io.EOF {
    60  			producerLogger.Debug("Received EOF, ending Chat")
    61  			return nil
    62  		}
    63  		if err != nil {
    64  			e := fmt.Errorf("Error during Chat, stopping handler: %s", err)
    65  			producerLogger.Error(e.Error())
    66  			return e
    67  		}
    68  		err = handler.HandleMessage(in)
    69  		if err != nil {
    70  			producerLogger.Errorf("Error handling message: %s", err)
    71  			return err
    72  		}
    73  
    74  	}
    75  }