minio/logger.go

/*
 * Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
 *
 * 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 main

import (
	"reflect"
	"runtime/debug"

	"github.com/Sirupsen/logrus"
	"github.com/minio/minio/pkg/probe"
)

type fields map[string]interface{}

var log = logrus.New() // Default console logger.

// logger carries logging configuration for various supported loggers.
// Currently supported loggers are
//
//   - console [default]
//   - file
//   - syslog
//
type logger struct {
	Console consoleLogger `json:"console"`
	File    fileLogger    `json:"file"`
	Syslog  syslogLogger  `json:"syslog"`
	// Add new loggers here.
}

// errorIf synonymous with fatalIf but doesn't exit on error != nil
func errorIf(err error, msg string, data ...interface{}) {
	if err == nil {
		return
	}
	sysInfo := probe.GetSysInfo()
	fields := logrus.Fields{
		"cause":   err.Error(),
		"type":    reflect.TypeOf(err),
		"sysInfo": sysInfo,
	}
	if globalTrace {
		stack := debug.Stack()
		fields["stack"] = string(stack)
	}
	log.WithFields(fields).Errorf(msg, data...)
}

// fatalIf wrapper function which takes error and prints jsonic error messages.
func fatalIf(err error, msg string, data ...interface{}) {
	if err == nil {
		return
	}
	sysInfo := probe.GetSysInfo()
	fields := logrus.Fields{
		"cause":   err.Error(),
		"type":    reflect.TypeOf(err),
		"sysInfo": sysInfo,
	}
	if globalTrace {
		stack := debug.Stack()
		fields["stack"] = string(stack)
	}
	log.WithFields(fields).Fatalf(msg, data...)
}