mirror of
https://github.com/arangodb/kube-arangodb.git
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122 lines
3.2 KiB
Go
122 lines
3.2 KiB
Go
//
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// DISCLAIMER
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//
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// Copyright 2018 ArangoDB GmbH, Cologne, Germany
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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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//
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// Copyright holder is ArangoDB GmbH, Cologne, Germany
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//
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// Author Ewout Prangsma
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//
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package logging
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import (
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"fmt"
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"os"
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"strings"
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"sync"
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"github.com/rs/zerolog"
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)
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var (
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// The defaultLevels list is used during development to increase the
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// default level for components that we care a little less about.
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defaultLevels = map[string]string{
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//"something.status": "info",
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}
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)
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// Service exposes the interfaces for a logger service
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// that supports different loggers with different levels.
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type Service interface {
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// MustGetLogger creates a logger with given name.
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MustGetLogger(name string) zerolog.Logger
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// MustSetLevel sets the log level for the component with given name to given level.
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MustSetLevel(name, level string)
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}
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// loggingService implements Service
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type loggingService struct {
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mutex sync.Mutex
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rootLog zerolog.Logger
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defaultLevel zerolog.Level
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levels map[string]zerolog.Level
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}
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// NewRootLogger creates a new zerolog logger with default settings.
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func NewRootLogger() zerolog.Logger {
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return zerolog.New(zerolog.ConsoleWriter{Out: os.Stdout}).With().Timestamp().Logger()
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}
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// NewService creates a new Service.
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func NewService(defaultLevel string) (Service, error) {
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l, err := stringToLevel(defaultLevel)
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if err != nil {
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return nil, maskAny(err)
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}
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rootLog := NewRootLogger()
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s := &loggingService{
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rootLog: rootLog,
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defaultLevel: l,
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levels: make(map[string]zerolog.Level),
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}
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for k, v := range defaultLevels {
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s.MustSetLevel(k, v)
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}
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return s, nil
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}
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// MustGetLogger creates a logger with given name
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func (s *loggingService) MustGetLogger(name string) zerolog.Logger {
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s.mutex.Lock()
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defer s.mutex.Unlock()
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level, found := s.levels[name]
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if !found {
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level = s.defaultLevel
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}
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return s.rootLog.With().Str("component", name).Logger().Level(level)
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}
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// MustSetLevel sets the log level for the component with given name to given level.
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func (s *loggingService) MustSetLevel(name, level string) {
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l, err := stringToLevel(level)
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if err != nil {
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panic(err)
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}
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s.mutex.Lock()
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defer s.mutex.Unlock()
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s.levels[name] = l
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}
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// stringToLevel converts a level string to a zerolog level
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func stringToLevel(l string) (zerolog.Level, error) {
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switch strings.ToLower(l) {
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case "debug":
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return zerolog.DebugLevel, nil
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case "info":
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return zerolog.InfoLevel, nil
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case "warn", "warning":
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return zerolog.WarnLevel, nil
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case "error":
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return zerolog.ErrorLevel, nil
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case "fatal":
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return zerolog.FatalLevel, nil
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case "panic":
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return zerolog.PanicLevel, nil
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}
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return zerolog.InfoLevel, fmt.Errorf("Unknown log level '%s'", l)
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}
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