76 lines
1.7 KiB
Go
76 lines
1.7 KiB
Go
// Copyright (c) Mainflux
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// SPDX-License-Identifier: Apache-2.0
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package logger
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import (
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"fmt"
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"io"
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"os"
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"time"
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"github.com/go-kit/log"
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)
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// Logger specifies logging API.
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type Logger interface {
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// Debug logs any object in JSON format on debug level.
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Debug(string)
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// Info logs any object in JSON format on info level.
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Info(string)
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// Warn logs any object in JSON format on warning level.
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Warn(string)
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// Error logs any object in JSON format on error level.
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Error(string)
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// Fatal logs any object in JSON format on any level and calls os.Exit(1).
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Fatal(string)
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}
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var _ Logger = (*logger)(nil)
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type logger struct {
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kitLogger log.Logger
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level Level
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}
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// New returns wrapped go kit logger.
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func New(out io.Writer, levelText string) (Logger, error) {
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var level Level
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err := level.UnmarshalText(levelText)
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if err != nil {
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return nil, fmt.Errorf(`{"level":"error","message":"%s: %s","ts":"%s"}`, err, levelText, time.RFC3339Nano)
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}
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l := log.NewJSONLogger(log.NewSyncWriter(out))
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l = log.With(l, "ts", log.DefaultTimestampUTC)
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return &logger{l, level}, err
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}
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func (l logger) Debug(msg string) {
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if Debug.isAllowed(l.level) {
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_ = l.kitLogger.Log("level", Debug.String(), "message", msg)
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}
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}
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func (l logger) Info(msg string) {
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if Info.isAllowed(l.level) {
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_ = l.kitLogger.Log("level", Info.String(), "message", msg)
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}
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}
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func (l logger) Warn(msg string) {
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if Warn.isAllowed(l.level) {
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_ = l.kitLogger.Log("level", Warn.String(), "message", msg)
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}
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}
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func (l logger) Error(msg string) {
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if Error.isAllowed(l.level) {
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_ = l.kitLogger.Log("level", Error.String(), "message", msg)
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}
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}
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func (l logger) Fatal(msg string) {
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_ = l.kitLogger.Log("fatal", msg)
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os.Exit(1)
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}
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