Mainflux.mainflux/readers/api/logging.go

// Copyright (c) Mainflux
// SPDX-License-Identifier: Apache-2.0

// +build !test

package api

import (
	"fmt"
	"time"

	"github.com/mainflux/mainflux/logger"
	"github.com/mainflux/mainflux/readers"
)

var _ readers.MessageRepository = (*loggingMiddleware)(nil)

type loggingMiddleware struct {
	logger logger.Logger
	svc    readers.MessageRepository
}

// LoggingMiddleware adds logging facilities to the core service.
func LoggingMiddleware(svc readers.MessageRepository, logger logger.Logger) readers.MessageRepository {
	return &loggingMiddleware{
		logger: logger,
		svc:    svc,
	}
}

func (lm *loggingMiddleware) ReadAll(chanID string, offset, limit uint64, query map[string]string) (page readers.MessagesPage, err error) {
	defer func(begin time.Time) {
		message := fmt.Sprintf("Method read_all for channel %s with offset %d and limit %d took %s to complete", chanID, offset, limit, time.Since(begin))
		if err != nil {
			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
			return
		}
		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
	}(time.Now())

	return lm.svc.ReadAll(chanID, offset, limit, query)
}