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https://github.com/etcd-io/etcd.git
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084c407a8d
Fix https://github.com/coreos/etcd/issues/6603. Instead adds 'SetLogger' to set global logger interface to avoid unnecessary logger updates.
83 lines
2.3 KiB
Go
83 lines
2.3 KiB
Go
// Copyright 2016 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package clientv3
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import (
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"io/ioutil"
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"log"
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"sync"
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"google.golang.org/grpc/grpclog"
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)
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// Logger is the logger used by client library.
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// It implements grpclog.Logger interface.
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type Logger grpclog.Logger
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var (
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logger settableLogger
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)
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type settableLogger struct {
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l grpclog.Logger
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mu sync.RWMutex
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}
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func init() {
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// disable client side logs by default
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logger.mu.Lock()
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logger.l = log.New(ioutil.Discard, "", 0)
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// logger has to override the grpclog at initialization so that
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// any changes to the grpclog go through logger with locking
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// instead of through SetLogger
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//
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// now updates only happen through settableLogger.set
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grpclog.SetLogger(&logger)
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logger.mu.Unlock()
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}
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// SetLogger sets client-side Logger. By default, logs are disabled.
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func SetLogger(l Logger) {
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logger.set(l)
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}
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// GetLogger returns the current logger.
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func GetLogger() Logger {
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return logger.get()
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}
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func (s *settableLogger) set(l Logger) {
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s.mu.Lock()
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logger.l = l
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s.mu.Unlock()
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}
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func (s *settableLogger) get() Logger {
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s.mu.RLock()
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l := logger.l
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s.mu.RUnlock()
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return l
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}
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// implement the grpclog.Logger interface
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func (s *settableLogger) Fatal(args ...interface{}) { s.get().Fatal(args...) }
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func (s *settableLogger) Fatalf(format string, args ...interface{}) { s.get().Fatalf(format, args...) }
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func (s *settableLogger) Fatalln(args ...interface{}) { s.get().Fatalln(args...) }
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func (s *settableLogger) Print(args ...interface{}) { s.get().Print(args...) }
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func (s *settableLogger) Printf(format string, args ...interface{}) { s.get().Printf(format, args...) }
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func (s *settableLogger) Println(args ...interface{}) { s.get().Println(args...) }
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