refactor: include logging framework (resolve #92)

config/config.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
+	"github.com/emvi/logbuch"
 	"github.com/gorilla/securecookie"
 	"github.com/jinzhu/configor"
 	"github.com/markbates/pkger"
@@ -14,7 +15,6 @@ import (
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
 	"io/ioutil"
-	"log"
 	"net/http"
 	"os"
 	"strings"
@@ -144,7 +144,7 @@ func (c *Config) GetFixturesFunc(dbDialect string) models.MigrationFunc {
 			return err
 		}
 
-		log.Printf("applied %d fixtures\n", n)
+		logbuch.Info("applied %d fixtures", n)
 		return nil
 	}
 }
@@ -221,13 +221,13 @@ func IsDev(env string) bool {
 func readVersion() string {
 	file, err := pkger.Open("/version.txt")
 	if err != nil {
-		log.Fatal(err)
+		logbuch.Fatal(err.Error())
 	}
 	defer file.Close()
 
 	bytes, err := ioutil.ReadAll(file)
 	if err != nil {
-		log.Fatal(err)
+		logbuch.Fatal(err.Error())
 	}
 
 	return strings.TrimSpace(string(bytes))
@@ -246,16 +246,16 @@ func readColors() map[string]map[string]string {
 
 	file, err := pkger.Open("/data/colors.json")
 	if err != nil {
-		log.Fatal(err)
+		logbuch.Fatal(err.Error())
 	}
 	defer file.Close()
 	bytes, err := ioutil.ReadAll(file)
 	if err != nil {
-		log.Fatal(err)
+		logbuch.Fatal(err.Error())
 	}
 
 	if err := json.Unmarshal(bytes, &colors); err != nil {
-		log.Fatal(err)
+		logbuch.Fatal(err.Error())
 	}
 
 	return colors
@@ -263,9 +263,8 @@ func readColors() map[string]map[string]string {
 
 func mustReadConfigLocation() string {
 	if _, err := os.Stat(*cFlag); err != nil {
-		log.Fatalf("failed to find config file at '%s'\n", *cFlag)
+		logbuch.Fatal("failed to find config file at '%s'", *cFlag)
 	}
-
 	return *cFlag
 }
 
@@ -292,7 +291,7 @@ func Load() *Config {
 	maybeMigrateLegacyConfig()
 
 	if err := configor.New(&configor.Config{}).Load(config, mustReadConfigLocation()); err != nil {
-		log.Fatalf("failed to read config: %v\n", err)
+		logbuch.Fatal("failed to read config: %v", err)
 	}
 
 	config.Version = readVersion()
@@ -314,7 +313,7 @@ func Load() *Config {
 	}
 
 	if config.Server.ListenIpV4 == "" && config.Server.ListenIpV6 == "" {
-		log.Fatalln("either of listen_ipv4 or listen_ipv6 must be set")
+		logbuch.Fatal("either of listen_ipv4 or listen_ipv6 must be set")
 	}
 
 	Set(config)

config/legacy.go

@@ -1,24 +1,24 @@
 package config
 
 import (
+	"github.com/emvi/logbuch"
 	"github.com/joho/godotenv"
 	"gopkg.in/ini.v1"
 	"gopkg.in/yaml.v2"
 	"io/ioutil"
-	"log"
 	"os"
 	"strconv"
 )
 
 func maybeMigrateLegacyConfig() {
 	if yes, err := shouldMigrateLegacyConfig(); err != nil {
-		log.Fatalf("failed to determine whether to migrate legacy config: %v\n", err)
+		logbuch.Fatal("failed to determine whether to migrate legacy config: %v", err)
 	} else if yes {
-		log.Printf("migrating legacy config (%s, %s) to new format (%s); see https://github.com/muety/wakapi/issues/54\n", defaultConfigPathLegacy, defaultEnvConfigPathLegacy, defaultConfigPath)
+		logbuch.Info("migrating legacy config (%s, %s) to new format (%s); see https://github.com/muety/wakapi/issues/54", defaultConfigPathLegacy, defaultEnvConfigPathLegacy, defaultConfigPath)
 		if err := migrateLegacyConfig(); err != nil {
-			log.Fatalf("failed to migrate legacy config: %v\n", err)
+			logbuch.Fatal("failed to migrate legacy config: %v", err)
 		}
-		log.Printf("config migration successful; please delete %s and %s now\n", defaultConfigPathLegacy, defaultEnvConfigPathLegacy)
+		logbuch.Info("config migration successful; please delete %s and %s now", defaultConfigPathLegacy, defaultEnvConfigPathLegacy)
 	}
 }
 

go.mod

@@ -3,6 +3,7 @@ module github.com/muety/wakapi
 go 1.13
 
 require (
+	github.com/emvi/logbuch v1.1.1
 	github.com/go-co-op/gocron v0.3.3
 	github.com/gorilla/handlers v1.4.2
 	github.com/gorilla/mux v1.7.3

go.sum

@@ -56,6 +56,8 @@ github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5m
 github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
 github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
 github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
+github.com/emvi/logbuch v1.1.1 h1:poBGNbHy/nB95oNoqLKAaJoBrcKxTO0W9DhMijKEkkU=
+github.com/emvi/logbuch v1.1.1/go.mod h1:J2Wgbr3BuSc1JO+D2MBVh6q3WPVSK5GzktwWz8pvkKw=
 github.com/envoyproxy/go-control-plane v0.6.9/go.mod h1:SBwIajubJHhxtWwsL9s8ss4safvEdbitLhGGK48rN6g=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=

main.go

@@ -3,13 +3,12 @@ package main
 //go:generate $GOPATH/bin/pkger
 
 import (
-	"fmt"
+	"github.com/emvi/logbuch"
 	"github.com/gorilla/handlers"
 	"github.com/markbates/pkger"
 	conf "github.com/muety/wakapi/config"
 	"github.com/muety/wakapi/migrations/common"
 	"github.com/muety/wakapi/repositories"
-	"log"
 	"net/http"
 	"strconv"
 	"time"
@@ -57,9 +56,11 @@ var (
 func main() {
 	config = conf.Load()
 
-	// Enable line numbers in logging
+	// Set log level
 	if config.IsDev() {
-		log.SetFlags(log.LstdFlags | log.Lshortfile)
+		logbuch.SetLevel(logbuch.LevelDebug)
+	} else {
+		logbuch.SetLevel(logbuch.LevelInfo)
 	}
 
 	// Connect to database
@@ -76,8 +77,8 @@ func main() {
 	sqlDb.SetMaxIdleConns(int(config.Db.MaxConn))
 	sqlDb.SetMaxOpenConns(int(config.Db.MaxConn))
 	if err != nil {
-		log.Println(err)
+		logbuch.Error(err.Error())
-		log.Fatal("could not connect to database")
+		logbuch.Fatal("could not connect to database")
 	}
 	defer sqlDb.Close()
 
@@ -203,35 +204,35 @@ func listen(handler http.Handler) {
 
 	if config.UseTLS() {
 		if s4 != nil {
-			fmt.Printf("Listening for HTTPS on %s.\n", s4.Addr)
+			logbuch.Info("--> Listening for HTTPS on %s... ✅", s4.Addr)
 			go func() {
 				if err := s4.ListenAndServeTLS(config.Server.TlsCertPath, config.Server.TlsKeyPath); err != nil {
-					log.Fatalln(err)
+					logbuch.Fatal(err.Error())
 				}
 			}()
 		}
 		if s6 != nil {
-			fmt.Printf("Listening for HTTPS on %s.\n", s6.Addr)
+			logbuch.Info("--> Listening for HTTPS on %s... ✅", s6.Addr)
 			go func() {
 				if err := s6.ListenAndServeTLS(config.Server.TlsCertPath, config.Server.TlsKeyPath); err != nil {
-					log.Fatalln(err)
+					logbuch.Fatal(err.Error())
 				}
 			}()
 		}
 	} else {
 		if s4 != nil {
-			fmt.Printf("Listening for HTTP on %s.\n", s4.Addr)
+			logbuch.Info("--> Listening for HTTP on %s... ✅", s4.Addr)
 			go func() {
 				if err := s4.ListenAndServe(); err != nil {
-					log.Fatalln(err)
+					logbuch.Fatal(err.Error())
 				}
 			}()
 		}
 		if s6 != nil {
-			fmt.Printf("Listening for HTTP on %s.\n", s6.Addr)
+			logbuch.Info("--> Listening for HTTP on %s... ✅", s6.Addr)
 			go func() {
 				if err := s6.ListenAndServe(); err != nil {
-					log.Fatalln(err)
+					logbuch.Fatal(err.Error())
 				}
 			}()
 		}
@@ -242,6 +243,6 @@ func listen(handler http.Handler) {
 
 func runDatabaseMigrations() {
 	if err := config.GetMigrationFunc(config.Db.Dialect)(db); err != nil {
-		log.Fatal(err)
+		logbuch.Fatal(err.Error())
 	}
 }

middlewares/authenticate.go

@@ -4,11 +4,11 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"github.com/emvi/logbuch"
 	conf "github.com/muety/wakapi/config"
 	"github.com/muety/wakapi/models"
 	"github.com/muety/wakapi/services"
 	"github.com/muety/wakapi/utils"
-	"log"
 	"net/http"
 	"strings"
 )
@@ -99,7 +99,7 @@ func (m *AuthenticateMiddleware) tryGetUserByCookie(r *http.Request) (*models.Us
 func CheckAndMigratePassword(user *models.User, login *models.Login, salt string, userServiceRef *services.IUserService) bool {
 	if utils.IsMd5(user.Password) {
 		if utils.CompareMd5(user.Password, login.Password, "") {
-			log.Printf("migrating old md5 password to new bcrypt format for user '%s'", user.ID)
+			logbuch.Info("migrating old md5 password to new bcrypt format for user '%s'", user.ID)
 			(*userServiceRef).MigrateMd5Password(user, login)
 			return true
 		}

middlewares/custom/wakatime.go

@@ -4,11 +4,11 @@ import (
 	"bytes"
 	"encoding/base64"
 	"fmt"
+	"github.com/emvi/logbuch"
 	"github.com/muety/wakapi/config"
 	"github.com/muety/wakapi/models"
 	"io"
 	"io/ioutil"
-	"log"
 	"net/http"
 	"time"
 )
@@ -72,7 +72,7 @@ func (m *WakatimeRelayMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Reque
 func (m *WakatimeRelayMiddleware) send(method, url string, body io.Reader, headers http.Header) {
 	request, err := http.NewRequest(method, url, body)
 	if err != nil {
-		log.Printf("error constructing relayed request – %v\n", err)
+		logbuch.Warn("error constructing relayed request – %v", err)
 		return
 	}
 
@@ -84,11 +84,11 @@ func (m *WakatimeRelayMiddleware) send(method, url string, body io.Reader, heade
 
 	response, err := m.httpClient.Do(request)
 	if err != nil {
-		log.Printf("error executing relayed request – %v\n", err)
+		logbuch.Warn("error executing relayed request – %v", err)
 		return
 	}
 
 	if response.StatusCode < 200 || response.StatusCode >= 300 {
-		log.Printf("failed to relay request, got status %d\n", response.StatusCode)
+		logbuch.Warn("failed to relay request, got status %d", response.StatusCode)
 	}
 }

migrations/common/custom_post.go

@@ -1,9 +1,9 @@
 package common
 
 import (
+	"github.com/emvi/logbuch"
 	"github.com/muety/wakapi/config"
 	"gorm.io/gorm"
-	"log"
 )
 
 var customPostMigrations []migrationFunc
@@ -22,9 +22,9 @@ func init() {
 
 func RunCustomPostMigrations(db *gorm.DB, cfg *config.Config) {
 	for _, m := range customPostMigrations {
-		log.Printf("potentially running migration '%s'\n", m.name)
+		logbuch.Info("potentially running migration '%s'", m.name)
 		if err := m.f(db, cfg); err != nil {
-			log.Fatalf("migration '%s' failed – %v\n", m.name, err)
+			logbuch.Fatal("migration '%s' failed – %v", m.name, err)
 		}
 	}
 }

migrations/common/custom_pre.go

@@ -1,10 +1,10 @@
 package common
 
 import (
+	"github.com/emvi/logbuch"
 	"github.com/muety/wakapi/config"
 	"github.com/muety/wakapi/models"
 	"gorm.io/gorm"
-	"log"
 )
 
 var customPreMigrations []migrationFunc
@@ -18,12 +18,12 @@ func init() {
 				oldIndexName, newIndexName := "idx_customrule_user", "idx_language_mapping_user"
 
 				if migrator.HasTable(oldTableName) {
-					log.Printf("renaming '%s' table to '%s'\n", oldTableName, newTableName)
+					logbuch.Info("renaming '%s' table to '%s'", oldTableName, newTableName)
 					if err := migrator.RenameTable(oldTableName, &models.LanguageMapping{}); err != nil {
 						return err
 					}
 
-					log.Printf("renaming '%s' index to '%s'\n", oldIndexName, newIndexName)
+					logbuch.Info("renaming '%s' index to '%s'", oldIndexName, newIndexName)
 					return migrator.RenameIndex(&models.LanguageMapping{}, oldIndexName, newIndexName)
 				}
 				return nil
@@ -42,12 +42,12 @@ func init() {
 					// https://stackoverflow.com/a/1884893/3112139
 					// unfortunately, we can't migrate existing sqlite databases to the newly introduced cascade settings
 					// things like deleting all summaries won't work in those cases unless an entirely new db is created
-					log.Println("not attempting to drop and regenerate constraints on sqlite")
+					logbuch.Info("not attempting to drop and regenerate constraints on sqlite")
 					return nil
 				}
 
 				if !migrator.HasTable(&models.KeyStringValue{}) {
-					log.Println("key-value table not yet existing")
+					logbuch.Info("key-value table not yet existing")
 					return nil
 				}
 
@@ -57,7 +57,7 @@ func init() {
 				}
 				lookupResult := db.Where(condition, lookupKey).First(&models.KeyStringValue{})
 				if lookupResult.Error == nil && lookupResult.RowsAffected > 0 {
-					log.Println("no need to migrate cascade constraints")
+					logbuch.Info("no need to migrate cascade constraints")
 					return nil
 				}
 
@@ -77,7 +77,7 @@ func init() {
 
 				for name, table := range constraints {
 					if migrator.HasConstraint(table, name) {
-						log.Printf("dropping constraint '%s'", name)
+						logbuch.Info("dropping constraint '%s'", name)
 						if err := migrator.DropConstraint(table, name); err != nil {
 							return err
 						}
@@ -100,9 +100,9 @@ func init() {
 
 func RunCustomPreMigrations(db *gorm.DB, cfg *config.Config) {
 	for _, m := range customPreMigrations {
-		log.Printf("potentially running migration '%s'\n", m.name)
+		logbuch.Info("potentially running migration '%s'", m.name)
 		if err := m.f(db, cfg); err != nil {
-			log.Fatalf("migration '%s' failed – %v\n", m.name, err)
+			logbuch.Fatal("migration '%s' failed – %v", m.name, err)
 		}
 	}
 }

migrations/common/languages.go

@@ -1,10 +1,10 @@
 package common
 
 import (
+	"github.com/emvi/logbuch"
 	"github.com/muety/wakapi/config"
 	"github.com/muety/wakapi/models"
 	"gorm.io/gorm"
-	"log"
 )
 
 func MigrateLanguages(db *gorm.DB) {
@@ -16,10 +16,10 @@ func MigrateLanguages(db *gorm.DB) {
 			Where("entity LIKE ?", "%."+k).
 			Updates(models.Heartbeat{Language: v})
 		if result.Error != nil {
-			log.Fatal(result.Error)
+			logbuch.Fatal(result.Error.Error())
 		}
 		if result.RowsAffected > 0 {
-			log.Printf("Migrated %+v rows for custom language %+s.\n", result.RowsAffected, k)
+			logbuch.Info("migrated %+v rows for custom language %+s", result.RowsAffected, k)
 		}
 	}
 }

repositories/key_value.go

@@ -2,10 +2,10 @@ package repositories
 
 import (
 	"errors"
+	"github.com/emvi/logbuch"
 	"github.com/muety/wakapi/models"
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
-	"log"
 )
 
 type KeyValueRepository struct {
@@ -41,7 +41,7 @@ func (r *KeyValueRepository) PutString(kv *models.KeyStringValue) error {
 	}
 
 	if result.RowsAffected != 1 {
-		log.Printf("warning: did not insert key '%s', maybe just updated?\n", kv.Key)
+		logbuch.Warn("did not insert key '%s', maybe just updated?", kv.Key)
 	}
 
 	return nil

routes/settings.go

@@ -3,6 +3,7 @@ package routes
 import (
 	"encoding/base64"
 	"fmt"
+	"github.com/emvi/logbuch"
 	"github.com/gorilla/mux"
 	"github.com/gorilla/schema"
 	conf "github.com/muety/wakapi/config"
@@ -10,7 +11,6 @@ import (
 	"github.com/muety/wakapi/models/view"
 	"github.com/muety/wakapi/services"
 	"github.com/muety/wakapi/utils"
-	"log"
 	"net/http"
 	"strconv"
 	"time"
@@ -298,16 +298,16 @@ func (h *SettingsHandler) PostRegenerateSummaries(w http.ResponseWriter, r *http
 
 	user := r.Context().Value(models.UserKey).(*models.User)
 
-	log.Printf("clearing summaries for user '%s'\n", user.ID)
+	logbuch.Info("clearing summaries for user '%s'", user.ID)
 	if err := h.summarySrvc.DeleteByUser(user.ID); err != nil {
-		log.Printf("failed to clear summaries: %v\n", err)
+		logbuch.Error("failed to clear summaries: %v", err)
 		w.WriteHeader(http.StatusInternalServerError)
 		templates[conf.SettingsTemplate].Execute(w, h.buildViewModel(r).WithError("failed to delete old summaries"))
 		return
 	}
 
 	if err := h.aggregationSrvc.Run(map[string]bool{user.ID: true}); err != nil {
-		log.Printf("failed to regenerate summaries: %v\n", err)
+		logbuch.Error("failed to regenerate summaries: %v", err)
 		w.WriteHeader(http.StatusInternalServerError)
 		templates[conf.SettingsTemplate].Execute(w, h.buildViewModel(r).WithError("failed to generate aggregations"))
 		return

services/aggregation.go

@@ -1,8 +1,8 @@
 package services
 
 import (
+	"github.com/emvi/logbuch"
 	"github.com/muety/wakapi/config"
-	"log"
 	"runtime"
 	"time"
 
@@ -40,7 +40,7 @@ type AggregationJob struct {
 func (srv *AggregationService) Schedule() {
 	// Run once initially
 	if err := srv.Run(nil); err != nil {
-		log.Fatalf("failed to run AggregationJob: %v\n", err)
+		logbuch.Fatal("failed to run AggregationJob: %v", err)
 	}
 
 	s := gocron.NewScheduler(time.Local)
@@ -73,9 +73,9 @@ func (srv *AggregationService) Run(userIds map[string]bool) error {
 func (srv *AggregationService) summaryWorker(jobs <-chan *AggregationJob, summaries chan<- *models.Summary) {
 	for job := range jobs {
 		if summary, err := srv.summaryService.Summarize(job.From, job.To, &models.User{ID: job.UserID}); err != nil {
-			log.Printf("Failed to generate summary (%v, %v, %s) – %v.\n", job.From, job.To, job.UserID, err)
+			logbuch.Error("failed to generate summary (%v, %v, %s) – %v", job.From, job.To, job.UserID, err)
 		} else {
-			log.Printf("Successfully generated summary (%v, %v, %s).\n", job.From, job.To, job.UserID)
+			logbuch.Info("successfully generated summary (%v, %v, %s)", job.From, job.To, job.UserID)
 			summaries <- summary
 		}
 	}
@@ -84,17 +84,17 @@ func (srv *AggregationService) summaryWorker(jobs <-chan *AggregationJob, summar
 func (srv *AggregationService) persistWorker(summaries <-chan *models.Summary) {
 	for summary := range summaries {
 		if err := srv.summaryService.Insert(summary); err != nil {
-			log.Printf("Failed to save summary (%v, %v, %s) – %v.\n", summary.UserID, summary.FromTime, summary.ToTime, err)
+			logbuch.Error("failed to save summary (%v, %v, %s) – %v", summary.UserID, summary.FromTime, summary.ToTime, err)
 		}
 	}
 }
 
 func (srv *AggregationService) trigger(jobs chan<- *AggregationJob, userIds map[string]bool) error {
-	log.Println("Generating summaries.")
+	logbuch.Info("generating summaries")
 
 	var users []*models.User
 	if allUsers, err := srv.userService.GetAll(); err != nil {
-		log.Println(err)
+		logbuch.Error(err.Error())
 		return err
 	} else if userIds != nil && len(userIds) > 0 {
 		users = make([]*models.User, len(userIds))
@@ -110,14 +110,14 @@ func (srv *AggregationService) trigger(jobs chan<- *AggregationJob, userIds map[
 	// Get a map from user ids to the time of their latest summary or nil if none exists yet
 	lastUserSummaryTimes, err := srv.summaryService.GetLatestByUser()
 	if err != nil {
-		log.Println(err)
+		logbuch.Error(err.Error())
 		return err
 	}
 
 	// Get a map from user ids to the time of their earliest heartbeats or nil if none exists yet
 	firstUserHeartbeatTimes, err := srv.heartbeatService.GetFirstByUsers()
 	if err != nil {
-		log.Println(err)
+		logbuch.Error(err.Error())
 		return err
 	}
 

services/alias.go

@@ -2,10 +2,10 @@ package services
 
 import (
 	"errors"
+	"github.com/emvi/logbuch"
 	"github.com/muety/wakapi/config"
 	"github.com/muety/wakapi/models"
 	"github.com/muety/wakapi/repositories"
-	"log"
 	"sync"
 )
 
@@ -110,6 +110,6 @@ func (srv *AliasService) DeleteMulti(aliases []*models.Alias) error {
 
 func (srv *AliasService) reinitUser(userId string) {
 	if err := srv.InitializeUser(userId); err != nil {
-		log.Printf("error initializing user aliases – %v\n", err)
+		logbuch.Error("error initializing user aliases – %v", err)
 	}
 }

services/misc.go

@@ -1,9 +1,9 @@
 package services
 
 import (
+	"github.com/emvi/logbuch"
 	"github.com/muety/wakapi/config"
 	"go.uber.org/atomic"
-	"log"
 	"runtime"
 	"strconv"
 	"time"
@@ -42,7 +42,7 @@ type CountTotalTimeResult struct {
 func (srv *MiscService) ScheduleCountTotalTime() {
 	// Run once initially
 	if err := srv.runCountTotalTime(); err != nil {
-		log.Fatalf("failed to run CountTotalTimeJob: %v\n", err)
+		logbuch.Error("failed to run CountTotalTimeJob: %v", err)
 	}
 
 	s := gocron.NewScheduler(time.Local)
@@ -80,9 +80,9 @@ func (srv *MiscService) runCountTotalTime() error {
 func (srv *MiscService) countTotalTimeWorker(jobs <-chan *CountTotalTimeJob, results chan<- *CountTotalTimeResult) {
 	for job := range jobs {
 		if result, err := srv.summaryService.Aliased(time.Time{}, time.Now(), &models.User{ID: job.UserID}, srv.summaryService.Retrieve); err != nil {
-			log.Printf("Failed to count total for user %s: %v.\n", job.UserID, err)
+			logbuch.Error("failed to count total for user %s: %v", job.UserID, err)
 		} else {
-			log.Printf("Successfully counted total for user %s.\n", job.UserID)
+			logbuch.Info("successfully counted total for user %s", job.UserID)
 			results <- &CountTotalTimeResult{
 				UserId: job.UserID,
 				Total:  result.TotalTime(),
@@ -107,13 +107,13 @@ func (srv *MiscService) persistTotalTimeWorker(results <-chan *CountTotalTimeRes
 		Key:   config.KeyLatestTotalTime,
 		Value: total.String(),
 	}); err != nil {
-		log.Printf("Failed to save total time count: %v\n", err)
+		logbuch.Error("failed to save total time count: %v", err)
 	}
 
 	if err := srv.keyValueService.PutString(&models.KeyStringValue{
 		Key:   config.KeyLatestTotalUsers,
 		Value: strconv.Itoa(c),
 	}); err != nil {
-		log.Printf("Failed to save total users count: %v\n", err)
+		logbuch.Error("failed to save total users count: %v", err)
 	}
 }

utils/http.go

@@ -2,7 +2,7 @@ package utils
 
 import (
 	"encoding/json"
-	"log"
+	"github.com/emvi/logbuch"
 	"net/http"
 )
 
@@ -10,6 +10,6 @@ func RespondJSON(w http.ResponseWriter, status int, object interface{}) {
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(status)
 	if err := json.NewEncoder(w).Encode(object); err != nil {
-		log.Printf("error while writing json response: %v", err)
+		logbuch.Error("error while writing json response: %v", err)
 	}
 }