/*
 *
 * Copyright 2019 Intel Corporation.
 * 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 config

import (
	"go.uber.org/zap"
	"log"
	"sync"
)

var logOnce sync.Once
var slogger *zap.SugaredLogger

//GetLoggerInstance returns a singleton instance of logger
func GetLoggerInstance() *zap.SugaredLogger {
	logOnce.Do(func() {
		logger, err := zap.NewProduction()
		if err != nil {
			log.Fatalf("can't initialize zap logger: %v", err)
		}
		defer logger.Sync()
		slogger = logger.Sugar()
	})
	return slogger
}