logger, implements #9

dataswamp/logging.go

@@ -0,0 +1,7 @@
+package dataswamp
+
+type Logger interface {
+	Debug(format string, a ...interface{})
+	Info(format string, a ...interface{})
+	Warn(format string, a ...interface{})
+}

dataswamp/services.go

@@ -15,6 +15,7 @@ type SwampFileService struct {
 	swamp_file_repo            swampfile.Repository
 	default_allowance_bytes    int64
 	default_allowance_duration time.Duration
+	logger                     Logger
 }
 
 func NewSwampFileService(
@@ -22,8 +23,9 @@ func NewSwampFileService(
 	swamp_file_repo swampfile.Repository,
 	da_bytes int64,
 	da_duration time.Duration,
+	logger Logger,
 ) SwampFileService {
-	return SwampFileService{namespace_repo, swamp_file_repo, da_bytes, da_duration}
+	return SwampFileService{namespace_repo, swamp_file_repo, da_bytes, da_duration, logger}
 }
 
 func (s SwampFileService) getOrCreateNs(namespace_in string) *namespace.Namespace {
@@ -114,6 +116,7 @@ func (s SwampFileService) OpenOutFile(ref swampfile.FileReference) (swampfile.Sw
 }
 
 func (s SwampFileService) CleanUpExpiredFiles() error {
+	s.logger.Info("Cleaning up expired files")
 	nss, err := s.namespace_repo.All()
 
 	if err != nil {

dataswamp/services_test.go

@@ -12,6 +12,12 @@ import (
 	m_swampfile "caj-larsson/bog/infrastructure/memory/swampfile"
 )
 
+type TestLogger struct{}
+
+func (t TestLogger) Debug(format string, a ...interface{}) {}
+func (t TestLogger) Info(format string, a ...interface{})  {}
+func (t TestLogger) Warn(format string, a ...interface{})  {}
+
 var file_ref1 = swampfile.FileReference{"/path1", "ns1"}
 var file_ref2 = swampfile.FileReference{"/path1", "ns2"}
 var file_ref3 = swampfile.FileReference{"/path2", "ns1"}
@@ -19,7 +25,7 @@ var file_ref3 = swampfile.FileReference{"/path2", "ns1"}
 func NewTestSwampFileService() SwampFileService {
 	file_repo := m_swampfile.NewRepository()
 	ns_repo := m_namespace.NewRepository()
-	return NewSwampFileService(ns_repo, file_repo, 1024, time.Hour)
+	return NewSwampFileService(ns_repo, file_repo, 1024, time.Hour, TestLogger{})
 }
 
 func TestFileDontExist(t *testing.T) {
@@ -138,7 +144,7 @@ func TestCleanUpExpired(t *testing.T) {
 	fs := afero.NewMemMapFs()
 	file_repo := m_swampfile.Repository{fs}
 	ns_repo := m_namespace.NewRepository()
-	s := NewSwampFileService(ns_repo, file_repo, 1024, time.Hour)
+	s := NewSwampFileService(ns_repo, file_repo, 1024, time.Hour, TestLogger{})
 
 	fakefile := bytes.NewBufferString("My bog data")
 	err := s.SaveFile(file_ref1, fakefile, int64(fakefile.Len()))

main.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"caj-larsson/bog/server"
-	"fmt"
 	"io/ioutil"
 )
 
@@ -17,9 +16,6 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
-
-	fmt.Printf("Dataswamp running")
-
 	bog := server.New(config)
 	bog.Run()
 }

server/bog.go

@@ -1,15 +1,15 @@
 package server
 
 import (
-	"fmt"
-	"net/http"
-	"strconv"
-	"time"
 	"caj-larsson/bog/dataswamp"
 	"caj-larsson/bog/dataswamp/namespace"
 	"caj-larsson/bog/dataswamp/swampfile"
 	fs_swampfile "caj-larsson/bog/infrastructure/fs/swampfile"
 	sql_namespace "caj-larsson/bog/infrastructure/sqlite/namespace"
+	"fmt"
+	"net/http"
+	"strconv"
+	"time"
 )
 
 type Router interface {
@@ -21,6 +21,7 @@ type Bog struct {
 	router       Router
 	file_service dataswamp.SwampFileService
 	address      string
+	logger       dataswamp.Logger
 }
 
 func buildFileDataRepository(config FileConfig) swampfile.Repository {
@@ -58,7 +59,7 @@ func (b *Bog) fileHandler(w http.ResponseWriter, r *http.Request) {
 		if err != nil {
 			panic(err)
 		}
-
+		b.logger.Info("Serving file '%s' of size %d from '%s'", ref.Path, swamp_file.Size(), ref.UserAgent)
 		http.ServeContent(w, r, swamp_file.Path(), swamp_file.Modified(), swamp_file)
 	case "POST":
 		fallthrough
@@ -70,7 +71,7 @@ func (b *Bog) fileHandler(w http.ResponseWriter, r *http.Request) {
 			w.WriteHeader(422)
 			return
 		}
-
+		b.logger.Info("Recieving file '%s' of size %d from '%s'", ref.Path, size, ref.UserAgent)
 		err = b.file_service.SaveFile(ref, r.Body, size)
 
 		if err != nil {
@@ -98,16 +99,22 @@ func New(config *Configuration) *Bog {
 	fsSwampRepo := buildFileDataRepository(config.File)
 	nsRepo := buildNamespaceRepository(config.Database)
 
+	logger := ServerLogger{Debug}
 	b.file_service = dataswamp.NewSwampFileService(
-		nsRepo, fsSwampRepo, config.Quota.ParsedSizeBytes(), config.Quota.ParsedDuration(),
+		nsRepo,
+		fsSwampRepo,
+		config.Quota.ParsedSizeBytes(),
+		config.Quota.ParsedDuration(),
+		logger,
 	)
-
+	b.logger = logger
 	b.router = new(http.ServeMux)
 	b.routes()
 	return b
 }
 
 func (b *Bog) Run() {
+	b.logger.Info("Starting bog on address: %s", b.address)
 	go b.cleanNamespaces()
 	http.ListenAndServe(b.address, b.router)
 }

server/bog_test.go

@@ -20,6 +20,7 @@ func TestApplication(t *testing.T) {
 		swampfile.NewRepository(),
 		1000,
 		time.Hour,
+		ServerLogger{Debug},
 	)
 
 	bog := Bog{

server/configuration.go

@@ -54,11 +54,16 @@ type DatabaseConfig struct {
 	Connection string
 }
 
+type LoggingConfig struct {
+	Level string
+}
+
 type Configuration struct {
 	Server   ServerConfig
 	File     FileConfig
 	Database DatabaseConfig
 	Quota    QuotaConfig
+	Logging  LoggingConfig
 }
 
 func (c *Configuration) bindAddress() string {

server/logger.go

@@ -0,0 +1,40 @@
+package server
+
+import (
+	"fmt"
+	"time"
+)
+
+const (
+	Debug int = 0
+	Info      = 1
+	Warn      = 2
+	None      = 3
+)
+
+type ServerLogger struct {
+	level int
+}
+
+func logf(level string, format string, a ...interface{}) {
+	head := fmt.Sprintf("%s - [%s]: ", time.Now().Format(time.RFC3339), level)
+	fmt.Printf(head+format+"\n", a...)
+}
+
+func (t ServerLogger) Debug(format string, a ...interface{}) {
+	if t.level <= Debug {
+		logf("DEBUG", format, a...)
+	}
+}
+
+func (t ServerLogger) Info(format string, a ...interface{}) {
+	if t.level <= Info {
+		logf("INFO", format, a...)
+	}
+}
+
+func (t ServerLogger) Warn(format string, a ...interface{}) {
+	if t.level <= Warn {
+		logf("WARN", format, a...)
+	}
+}