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logging.go
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logging.go
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/*
Copyright IBM Corp. 2016 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 util
import (
"io/ioutil"
"log"
"sync"
"github.com/hyperledger/fabric/common/flogging"
"github.com/op/go-logging"
"google.golang.org/grpc/grpclog"
)
// Module names for logger initialization.
const (
LoggingChannelModule = "gossip/channel"
LoggingCommModule = "gossip/comm"
LoggingDiscoveryModule = "gossip/discovery"
LoggingElectionModule = "gossip/election"
LoggingGossipModule = "gossip/gossip"
LoggingMockModule = "gossip/comm/mock"
LoggingPullModule = "gossip/pull"
LoggingServiceModule = "gossip/service"
LoggingStateModule = "gossip/state"
)
var loggersByModules = make(map[string]*logging.Logger)
var lock = sync.Mutex{}
var logger = logging.MustGetLogger("gossip/util")
// defaultSpec is used to set the default logging level for all the
// gossip modules.
var defaultSpec = "WARNING"
func init() {
// This make sure we get a "leveled" logging using the default
// format and output location defined in the flogging package,
// when the gossip module is not called from a peer process.
flogging.InitFromSpec(defaultSpec)
logger.Debugf("Setting default logging level to %s.", defaultSpec)
grpclog.SetLogger(log.New(ioutil.Discard, "", 0))
}
// GetLogger returns a logger for given gossip module and peerID
func GetLogger(module string, peerID string) *logging.Logger {
if peerID != "" {
module = module + "#" + peerID
}
lock.Lock()
defer lock.Unlock()
if lgr, ok := loggersByModules[module]; ok {
return lgr
}
// Logger doesn't exist, create a new one
lgr := logging.MustGetLogger(module)
loggersByModules[module] = lgr
return lgr
}