github.com/tenywen/fabric@v1.0.0-beta.0.20170620030522-a5b1ed380643/gossip/util/logging.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 util
    18  
    19  import (
    20  	"sync"
    21  
    22  	"github.com/hyperledger/fabric/common/flogging"
    23  	"github.com/op/go-logging"
    24  )
    25  
    26  // Module names for logger initialization.
    27  const (
    28  	LoggingChannelModule   = "gossip/channel"
    29  	LoggingCommModule      = "gossip/comm"
    30  	LoggingDiscoveryModule = "gossip/discovery"
    31  	LoggingElectionModule  = "gossip/election"
    32  	LoggingGossipModule    = "gossip/gossip"
    33  	LoggingMockModule      = "gossip/comm/mock"
    34  	LoggingPullModule      = "gossip/pull"
    35  	LoggingServiceModule   = "gossip/service"
    36  	LoggingStateModule     = "gossip/state"
    37  )
    38  
    39  var loggersByModules = make(map[string]*logging.Logger)
    40  var lock = sync.Mutex{}
    41  var testMode bool
    42  
    43  // defaultTestSpec is the default logging level for gossip tests
    44  var defaultTestSpec = "WARNING"
    45  
    46  // GetLogger returns a logger for given gossip module and peerID
    47  func GetLogger(module string, peerID string) *logging.Logger {
    48  	if peerID != "" && testMode {
    49  		module = module + "#" + peerID
    50  	}
    51  
    52  	lock.Lock()
    53  	defer lock.Unlock()
    54  
    55  	if lgr, ok := loggersByModules[module]; ok {
    56  		return lgr
    57  	}
    58  
    59  	// Logger doesn't exist, create a new one
    60  	lgr := flogging.MustGetLogger(module)
    61  	loggersByModules[module] = lgr
    62  	return lgr
    63  }
    64  
    65  // SetupTestLogging sets the default log levels for gossip unit tests
    66  func SetupTestLogging() {
    67  	testMode = true
    68  	flogging.InitFromSpec(defaultTestSpec)
    69  }