Renaming SwampfileService -> DataSwampService

Dockerfile

@@ -2,10 +2,16 @@ FROM golang:alpine as builder
 
 ENV GO111MODULE=on
 
-# Create the user and group files to run unprivileged
-RUN mkdir /user && \
-    echo 'nobody:x:65534:65534:nobody:/:' > /user/passwd && \
-    echo 'nobody:x:65534:' > /user/group
+ENV USER=appuser
+ENV UID=1000
+RUN adduser \
+    --disabled-password \
+    --gecos "" \
+    --home "/nonexistent" \
+    --shell "/sbin/nologin" \
+    --no-create-home \
+    --uid "${UID}" \
+    "${USER}"
 
 RUN apk update && apk add --no-cache git ca-certificates tzdata sqlite build-base
 RUN mkdir /build
@@ -15,11 +21,13 @@ WORKDIR /build
 COPY ./ ./
 RUN CGO_ENABLED=1 GOOS=linux go build -a -installsuffix cgo -ldflags '-extldflags "-static"' -o bog .
 
-FROM golang:alpine AS final
+FROM scratch AS final
 LABEL author="Cajually <me@caj.me>"
 
 COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
-COPY --from=builder /user/group /user/passwd /etc/
+COPY --from=builder /etc/passwd /etc/passwd
+COPY --from=builder /etc/group /etc/group
+
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
 COPY --from=builder /build/bog /
 COPY --from=builder /build/server/views /server/views
@@ -27,7 +35,7 @@ COPY --from=builder /build/default.toml /
 
 WORKDIR /
 
-USER nobody:nobody
+USER appuser:appuser
 ENTRYPOINT ["/bog"]
 
 EXPOSE 8002

dataswamp/admin_service.go

@@ -1 +1,7 @@
 package dataswamp
+
+import (
+//	"caj-larsson/bog/dataswamp/namespace"
+)
+
+type AdminService struct{}

dataswamp/logging.go

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

dataswamp/namespace/entities.go

@@ -11,7 +11,6 @@ type Namespace struct {
 	LastSeen          time.Time
 	AllowanceDuration time.Duration
 	FileQuota         FileSizeQuota
-	Usage             FileStat
 	Download          FileStat
 	Upload            FileStat
 }

dataswamp/namespace/repository_contract.go

@@ -27,13 +27,15 @@ func basicNamespaceContract(fac func() Repository, t *testing.T) {
 		FileSizeQuota{1000, 0},
 		FileStat{1, 2},
 		FileStat{3, 4},
-		FileStat{5, 6},
 	}
 
-	ns1, _ := r.Create(ns)
+	ns1, err := r.Create(ns)
+	is.NoErr(err)
 	ns.Name = "n2"
-	ns2, _ := r.Create(ns)
-	is.True(ns1 != ns2)
+	ns2, err := r.Create(ns)
+	is.NoErr(err)
+
+	is.True(ns1.ID != ns2.ID)
 
 	all, err = r.All()
 

dataswamp/namespace/service.go

@@ -0,0 +1,111 @@
+package namespace
+
+import (
+	"caj-larsson/bog/util"
+	"fmt"
+	"time"
+)
+
+type Clock interface {
+	Now() time.Time
+}
+
+type NamespaceService struct {
+	repo                Repository
+	outboxes            []func(util.Event)
+	logger              util.Logger
+	clock               Clock
+	default_ttl         time.Duration
+	default_quota_bytes int64
+}
+
+func NewNamespaceService(repo Repository, logger util.Logger, clock Clock, default_ttl time.Duration, default_quota_bytes int64) *NamespaceService {
+	return &NamespaceService{
+		repo,
+		nil,
+		logger,
+		clock,
+		default_ttl,
+		default_quota_bytes,
+	}
+}
+
+func (s *NamespaceService) GetOrCreateNs(name string) *Namespace {
+	ns, err := s.repo.GetByName(name)
+
+	if err == ErrNotExists {
+		new_ns := Namespace{
+			0,
+			name,
+			s.clock.Now(),
+			s.default_ttl,
+			FileSizeQuota{s.default_quota_bytes, 0},
+			FileStat{0, 0},
+			FileStat{0, 0},
+		}
+		created_ns, err := s.repo.Create(new_ns)
+
+		if err != nil {
+			panic(err)
+		}
+
+		return created_ns
+	}
+
+	if err != nil {
+		panic(err)
+	}
+	return ns
+}
+
+func (s *NamespaceService) Wire(reg func(string, util.EventHandler), outbox func(ev util.Event)) {
+	reg("FileUsed", s.handleFileUsed)
+	s.outboxes = append(s.outboxes, outbox)
+
+	reg("FileUsed", s.handleFileUsed)
+	reg("FileDeleted", s.handleFileDeleted)
+	reg("FileRecieved", s.handleFileRecieved)
+}
+
+func (s *NamespaceService) All() []Namespace {
+	nss, err := s.repo.All()
+	if err != nil {
+		panic(err)
+	}
+	return nss
+}
+
+func (s *NamespaceService) handleFileUsed(payload interface{}) {
+	var payload_s = payload.(struct {
+		Name string
+		Size int64
+	})
+	fmt.Printf("file used %v\n", payload_s)
+	ns := s.GetOrCreateNs(payload_s.Name)
+	ns.FileQuota = ns.FileQuota.Add(payload_s.Size)
+	s.repo.Update(ns.ID, *ns)
+}
+
+func (s *NamespaceService) handleFileDeleted(payload interface{}) {
+	var payload_s = payload.(struct {
+		Name string
+		Size int64
+	})
+	fmt.Printf("file deleted  %v\n", payload_s)
+	ns := s.GetOrCreateNs(payload_s.Name)
+	ns.FileQuota = ns.FileQuota.Add(-payload_s.Size)
+	fmt.Printf("file usage  %v\n", ns.FileQuota)
+	s.repo.Update(ns.ID, *ns)
+}
+
+func (s *NamespaceService) handleFileRecieved(payload interface{}) {
+	var payload_s = payload.(struct {
+		Name string
+		Size int64
+	})
+	fmt.Printf("file recieved  %v\n", payload_s)
+	ns := s.GetOrCreateNs(payload_s.Name)
+	ns.FileQuota = ns.FileQuota.Add(payload_s.Size)
+	fmt.Printf("file usage  %v\n", ns.FileQuota)
+	s.repo.Update(ns.ID, *ns)
+}

dataswamp/namespace/service_test.go

@@ -0,0 +1,38 @@
+package namespace
+
+import (
+	"caj-larsson/bog/util"
+	"testing"
+)
+
+func TestEventTest(t *testing.T) {
+	eb := util.NewEventBus()
+	svc := NamespaceService{}
+
+	svc.Wire(eb.Register, eb.Handle)
+
+	events := []util.Event{
+		*util.NewEvent("FileUsed", struct {
+			Name string
+			Size int64
+		}{
+			"asd",
+			int64(12),
+		}),
+		*util.NewEvent("FileDeleted", struct {
+			Name string
+			Size int64
+		}{
+			"asd",
+			int64(12),
+		}),
+		*util.NewEvent("FileRecieved", struct {
+			Name string
+			Size int64
+		}{
+			"asd",
+			int64(12),
+		}),
+	}
+	util.AcceptsMessage(t, eb, events)
+}

dataswamp/namespace/valueobjects.go

@@ -13,28 +13,18 @@ func (f FileSizeQuota) Remaining() int64 {
 	return f.AllowanceKB - f.CurrentUsage
 }
 
-func (f FileSizeQuota) Add(size int64) (*FileSizeQuota, error) {
-	if !f.Allows(size) {
-		return nil, ErrExceedQuota
-	}
-
-	n := FileSizeQuota {
+func (f FileSizeQuota) Add(size int64) FileSizeQuota {
+	return FileSizeQuota{
 		f.AllowanceKB,
 		f.CurrentUsage + size,
 	}
-	return &n, nil
 }
 
-func (f FileSizeQuota) Remove(size int64) (*FileSizeQuota, error) {
-	if size > f.CurrentUsage {
-		return nil, ErrQuotaInvalid
-	}
-
-	n := FileSizeQuota {
+func (f FileSizeQuota) Remove(size int64) FileSizeQuota {
+	return FileSizeQuota{
 		f.AllowanceKB,
 		f.CurrentUsage - size,
 	}
-	return &n, nil
 }
 
 type FileStat struct {

dataswamp/namespace/valueobjects_test.go

@@ -15,27 +15,9 @@ func TestQuota(t *testing.T) {
 
 func TestQuotaManipulation(t *testing.T) {
 	is := is.New(t)
-	quota := &FileSizeQuota{1000, 0}
-	quota, err := quota.Add(500)
-	is.NoErr(err)
-
+	quota := FileSizeQuota{1000, 0}
+	quota = quota.Add(500)
 	is.Equal(quota.CurrentUsage, int64(500))
-
-	quota, err = quota.Add(500)
-	is.NoErr(err)
-
-	_ , err = quota.Add(1)
-	is.Equal(err, ErrExceedQuota)
-
-	is.Equal(quota.CurrentUsage, int64(1000))
-
-	_ , err = quota.Remove(1001)
-	is.Equal(err, ErrQuotaInvalid)
-
-	is.Equal(quota.CurrentUsage, int64(1000))
-
-	quota, err = quota.Remove(1000)
-	is.NoErr(err)
-
-	is.Equal(quota.CurrentUsage, int64(0))
+	quota = quota.Remove(1000)
+	is.Equal(quota.CurrentUsage, int64(-500))
 }

dataswamp/swamp_service.go

@@ -3,6 +3,7 @@ package dataswamp
 import (
 	"caj-larsson/bog/dataswamp/namespace"
 	"caj-larsson/bog/dataswamp/swampfile"
+	"caj-larsson/bog/util"
 	"io"
 	"strconv"
 	"time"
@@ -10,56 +11,29 @@ import (
 	//	"fmt"
 )
 
-type SwampFileService struct {
-	namespace_repo             namespace.Repository
-	swamp_file_repo            swampfile.Repository
-	default_allowance_bytes    int64
-	default_allowance_duration time.Duration
-	logger                     Logger
+type DataSwampService struct {
+	ns_svc          namespace.NamespaceService
+	swamp_file_repo swampfile.Repository
+	logger          util.Logger
+	eventBus        util.EventBus
 }
 
-func NewSwampFileService(
-	namespace_repo namespace.Repository,
+func NewDataSwampService(
+	ns_svc namespace.NamespaceService,
 	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, logger}
+	logger util.Logger,
+) *DataSwampService {
+	s := DataSwampService{ns_svc, swamp_file_repo, logger, *util.NewEventBus()}
+	ns_svc.Wire(s.eventBus.Register, s.eventBus.Handle)
+	return &s
 }
 
-func (s SwampFileService) getOrCreateNs(namespace_in string) *namespace.Namespace {
-	ns, err := s.namespace_repo.GetByName(namespace_in)
-
-	if err == namespace.ErrNotExists {
-		new_ns := namespace.Namespace{
-			0,
-			namespace_in,
-			time.Now(),
-			s.default_allowance_duration,
-			namespace.FileSizeQuota{s.default_allowance_bytes, 0},
-			namespace.FileStat{0, 0},
-			namespace.FileStat{0, 0},
-			namespace.FileStat{0, 0},
-		}
-		created_ns, err := s.namespace_repo.Create(new_ns)
-
-		if err != nil {
-			panic(err)
-		}
-
-		return created_ns
-	}
-
-	if err != nil {
-		panic(err)
-	}
-
-	return ns
+func (s DataSwampService) NamespaceStats() []namespace.Namespace {
+	return s.ns_svc.All()
 }
 
-func (s SwampFileService) SaveFile(ref swampfile.FileReference, src io.Reader, size int64) error {
-	ns := s.getOrCreateNs(ref.UserAgent)
+func (s DataSwampService) SaveFile(ref swampfile.FileReference, src io.Reader, size int64) error {
+	ns := s.ns_svc.GetOrCreateNs(ref.UserAgent)
 
 	r, err := ref.Clean(true)
 
@@ -74,13 +48,23 @@ func (s SwampFileService) SaveFile(ref swampfile.FileReference, src io.Reader, s
 	f, err := s.swamp_file_repo.Create(r.Path, strconv.FormatInt(ns.ID, 10))
 
 	if err != nil {
+		// TODO: convert this into a different error.
 		return err
 	}
 
+	s.eventBus.Handle(*util.NewEvent("FileUsed", struct {
+		Name string
+		Size int64
+	}{
+		ns.Name,
+		f.Size(),
+	}))
+
+	// TODO: rewrite this into an interruptable loop that emits downloaded events
 	written, err := io.CopyN(f, src, size)
 
 	if written < size {
-		s.swamp_file_repo.Delete(r.Path, strconv.FormatInt(ns.ID, 10))
+		s.swamp_file_repo.Delete(r.Path, strconv.FormatInt(ns.ID, 10)) //
 		return swampfile.ErrContentSizeExaggerated
 	}
 
@@ -94,20 +78,19 @@ func (s SwampFileService) SaveFile(ref swampfile.FileReference, src io.Reader, s
 	}
 
 	f.Close()
-	uq, err := ns.FileQuota.Add(size)
-	if err != nil {
-		return err
-	}
-	ns.FileQuota = *uq
-	ns.Usage = ns.Usage.Add(size)
-	ns.Upload = ns.Upload.Add(size)
-	s.namespace_repo.Update(ns.ID, *ns)
+	s.eventBus.Handle(*util.NewEvent("FileRecieved", struct {
+		Name string
+		Size int64
+	}{
+		ns.Name,
+		written,
+	}))
 
 	return nil
 }
 
-func (s SwampFileService) OpenOutFile(ref swampfile.FileReference) (swampfile.SwampOutFile, error) {
-	ns := s.getOrCreateNs(ref.UserAgent)
+func (s DataSwampService) OpenOutFile(ref swampfile.FileReference) (swampfile.SwampOutFile, error) {
+	ns := s.ns_svc.GetOrCreateNs(ref.UserAgent)
 
 	r, err := ref.Clean(true)
 
@@ -121,41 +104,31 @@ func (s SwampFileService) OpenOutFile(ref swampfile.FileReference) (swampfile.Sw
 		return nil, err
 	}
 
-	ns.Download = ns.Download.Add(f.Size())
-	s.namespace_repo.Update(ns.ID, *ns)
+	s.eventBus.Handle(*util.NewEvent("FileSent", f.Size()))
 
 	return f, nil
 }
 
-func (s SwampFileService) NamespaceStats() ([]namespace.Namespace, error) {
-	return s.namespace_repo.All()
-}
-
-func (s SwampFileService) CleanUpExpiredFiles() error {
+func (s DataSwampService) CleanUpExpiredFiles() error {
 	s.logger.Info("Cleaning up expired files")
-	nss, err := s.namespace_repo.All()
 
-	if err != nil {
-		return err
-	}
-
-	for _, ns := range nss {
+	for _, ns := range s.ns_svc.All() {
 		expiry := time.Now().Add(-ns.AllowanceDuration)
 		dfs, err := s.swamp_file_repo.DeleteOlderThan(strconv.FormatInt(ns.ID, 10), expiry)
 
-		for _, df := range dfs {
-			dq, err := ns.FileQuota.Remove(df.Size)
-			if err != nil {
-				dq.CurrentUsage = 0
-			}
-			ns.FileQuota = *dq
-		}
-
 		if err != nil {
 			panic(err)
 		}
 
-		s.namespace_repo.Update(ns.ID, ns)
+		for _, df := range dfs {
+			s.eventBus.Handle(*util.NewEvent("FileDeleted", struct {
+				Name string
+				Size int64
+			}{
+				ns.Name,
+				df.Size,
+			}))
+		}
 	}
 	return nil
 }

dataswamp/swamp_service_test.go

@@ -2,14 +2,16 @@ package dataswamp
 
 import (
 	"bytes"
+	"caj-larsson/bog/dataswamp/namespace"
 	"caj-larsson/bog/dataswamp/swampfile"
+	m_namespace "caj-larsson/bog/infrastructure/memory/namespace"
+	m_swampfile "caj-larsson/bog/infrastructure/memory/swampfile"
+	"caj-larsson/bog/infrastructure/system_time"
+	"fmt"
 	"github.com/matryer/is"
 	"github.com/spf13/afero"
 	"testing"
 	"time"
-	//	"caj-larsson/bog/dataswamp/namespace"
-	m_namespace "caj-larsson/bog/infrastructure/memory/namespace"
-	m_swampfile "caj-larsson/bog/infrastructure/memory/swampfile"
 )
 
 type TestLogger struct{}
@@ -22,15 +24,25 @@ var file_ref1 = swampfile.FileReference{"/path1", "ns1"}
 var file_ref2 = swampfile.FileReference{"/path1", "ns2"}
 var file_ref3 = swampfile.FileReference{"/path2", "ns1"}
 
-func NewTestSwampFileService() SwampFileService {
+func NewTestDataSwampService() DataSwampService {
 	file_repo := m_swampfile.NewRepository()
 	ns_repo := m_namespace.NewRepository()
-	return NewSwampFileService(ns_repo, file_repo, 1024, time.Hour, TestLogger{})
+
+	logger := TestLogger{}
+	ns_svc := namespace.NewNamespaceService(
+		ns_repo,
+		logger,
+		system_time.Clock{},
+		time.Hour,
+		1024,
+	)
+
+	return *NewDataSwampService(*ns_svc, file_repo, logger)
 }
 
 func TestFileDontExist(t *testing.T) {
 	is := is.New(t)
-	s := NewTestSwampFileService()
+	s := NewTestDataSwampService()
 	outfile, err := s.OpenOutFile(file_ref1)
 
 	is.True(err == swampfile.ErrNotExists)
@@ -39,7 +51,7 @@ func TestFileDontExist(t *testing.T) {
 
 func TestFileIsStored(t *testing.T) {
 	is := is.New(t)
-	s := NewTestSwampFileService()
+	s := NewTestDataSwampService()
 
 	fakefile := bytes.NewBufferString("My bog data")
 
@@ -60,7 +72,7 @@ func TestFileIsStored(t *testing.T) {
 
 func TestFileIsReadBack(t *testing.T) {
 	is := is.New(t)
-	s := NewTestSwampFileService()
+	s := NewTestDataSwampService()
 
 	infile := bytes.NewBufferString("My bog data")
 
@@ -76,7 +88,7 @@ func TestFileIsReadBack(t *testing.T) {
 
 func TestNSIsolation(t *testing.T) {
 	is := is.New(t)
-	s := NewTestSwampFileService()
+	s := NewTestDataSwampService()
 
 	ns1_file := bytes.NewBufferString("My bog data ns1")
 	ns2_file := bytes.NewBufferString("My bog data ns2")
@@ -94,7 +106,7 @@ func TestNSIsolation(t *testing.T) {
 
 func TestPathStrictMode(t *testing.T) {
 	is := is.New(t)
-	s := NewTestSwampFileService()
+	s := NewTestDataSwampService()
 
 	ns_file := bytes.NewBufferString("My bog data ns1")
 
@@ -114,7 +126,7 @@ func TestPathStrictMode(t *testing.T) {
 
 func TestQuotaWithContenSizeLieOver(t *testing.T) {
 	is := is.New(t)
-	s := NewTestSwampFileService()
+	s := NewTestDataSwampService()
 
 	largefakefile := bytes.NewBufferString("")
 
@@ -129,7 +141,7 @@ func TestQuotaWithContenSizeLieOver(t *testing.T) {
 
 func TestQuotaWithContenSizeLieUnder(t *testing.T) {
 	is := is.New(t)
-	s := NewTestSwampFileService()
+	s := NewTestDataSwampService()
 
 	largefakefile := bytes.NewBufferString("small")
 
@@ -144,22 +156,32 @@ 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, TestLogger{})
-
-	fakefile := bytes.NewBufferString("My bog data")
+	logger := TestLogger{}
+	ns_svc := namespace.NewNamespaceService(
+		ns_repo,
+		logger,
+		system_time.Clock{},
+		time.Hour,
+		1024,
+	)
+
+	s := NewDataSwampService(*ns_svc, file_repo, logger)
+
+	fakefile := bytes.NewBufferString("My bog")
 	err := s.SaveFile(file_ref1, fakefile, int64(fakefile.Len()))
 	is.NoErr(err)
 
-	fakefile = bytes.NewBufferString("My bog data")
+	fakefile = bytes.NewBufferString("My bog")
 	err = s.SaveFile(file_ref3, fakefile, int64(fakefile.Len()))
 	is.NoErr(err)
 
 	err = fs.Chtimes("1/path1", time.Now(), time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC))
-	is.NoErr(err)
+
 	is.NoErr(s.CleanUpExpiredFiles())
 
 	ns, err := ns_repo.GetByName("ns1")
+	fmt.Printf("file final usage  %v\n", ns.FileQuota)
 	is.NoErr(err)
-
-	is.Equal(ns.FileQuota.CurrentUsage, int64(len("My bog data")))
+	fmt.Printf("file\n")
+	is.Equal(ns.FileQuota.CurrentUsage, int64(len("My bog")))
 }

dataswamp/swampfile/valueobjects.go

@@ -43,7 +43,7 @@ func (fr *FileReference) Clean(strict bool) (*FileReference, error) {
 		return nil, ErrUnacceptablePath
 	}
 
-	n := FileReference {
+	n := FileReference{
 		c,
 		fr.UserAgent,
 	}

infrastructure/fs/swampfile/repository.go

@@ -48,6 +48,13 @@ func (f FileSystemSwampFileData) Modified() time.Time {
 	return stat.ModTime()
 }
 
+func (f FileSystemSwampFileData) Truncate() {
+	err := f.file.Truncate(0)
+	if err != nil {
+		panic(err)
+	}
+}
+
 type Repository struct {
 	Root string
 }
@@ -98,6 +105,7 @@ func (f Repository) Create(filename string, namespace_ns string) (swampfile.Swam
 	if err != nil {
 		panic(err)
 	}
+	file.Truncate(0)
 
 	bfd := FileSystemSwampFileData{filename, stat_info.Size(), stat_info.ModTime(), file}
 

infrastructure/memory/swampfile/repository.go

@@ -44,6 +44,13 @@ func (f SwampFile) Modified() time.Time {
 	return stat.ModTime()
 }
 
+func (f SwampFile) Truncate() {
+	err := f.file.Truncate(0)
+	if err != nil {
+		panic(err)
+	}
+}
+
 // The actual repository
 type Repository struct {
 	Fs afero.Fs

infrastructure/sqlite/namespace/models.go

@@ -21,7 +21,6 @@ type Namespace struct {
 	AllowanceTime sql.NullInt64
 	QuotaKb       sql.NullInt64
 	QuotaUsageKb  sql.NullInt64
-	UsageID       int64
 	DownloadID    int64
 	UploadID      int64
 }

infrastructure/sqlite/namespace/queries.sql

@@ -6,11 +6,10 @@ INSERT INTO
     allowance_time,
     quota_kb,
     quota_usage_kb,
-    usage_id,
     download_id,
     upload_id
   )
-  values(?, ?, ?, ?, ?, ?, ?, ?)
+  values(?, ?, ?, ?, ?, ?, ?)
   returning id;
 
 -- name: CreateFileStats :one
@@ -26,15 +25,11 @@ SELECT
  ns.allowance_time,
  ns.quota_kb,
  ns.quota_usage_kb,
- u.num as u_num,
- u.size_b as u_size_b,
  d.num as d_num,
  d.size_b as d_size_b,
  ul.num as ul_num,
  ul.size_b as ul_size_b
  FROM namespace as ns
- JOIN file_stats as u
-  ON ns.usage_id = u.id
  JOIN file_stats as d
   ON ns.download_id = d.id
  JOIN file_stats as ul
@@ -48,15 +43,11 @@ SELECT
  ns.allowance_time,
  ns.quota_kb,
  ns.quota_usage_kb,
- u.num as u_num,
- u.size_b as u_size_b,
  d.num as d_num,
  d.size_b as d_size_b,
  ul.num as ul_num,
  ul.size_b as ul_size_b
  FROM namespace as ns
- JOIN file_stats as u
-  ON ns.usage_id = u.id
  JOIN file_stats as d
   ON ns.download_id = d.id
  JOIN file_stats as ul
@@ -78,7 +69,7 @@ UPDATE namespace SET
  quota_kb = ?,
  quota_usage_kb = ?
  WHERE id = ?
- RETURNING usage_id, download_id, upload_id;
+ RETURNING download_id, upload_id;
 
 -- name: DeleteNameSpace :exec
 DELETE FROM namespace where id = ?;

infrastructure/sqlite/namespace/queries.sql.go

@@ -18,15 +18,11 @@ SELECT
  ns.allowance_time,
  ns.quota_kb,
  ns.quota_usage_kb,
- u.num as u_num,
- u.size_b as u_size_b,
  d.num as d_num,
  d.size_b as d_size_b,
  ul.num as ul_num,
  ul.size_b as ul_size_b
  FROM namespace as ns
- JOIN file_stats as u
-  ON ns.usage_id = u.id
  JOIN file_stats as d
   ON ns.download_id = d.id
  JOIN file_stats as ul
@@ -40,8 +36,6 @@ type AllNamespacesRow struct {
 	AllowanceTime sql.NullInt64
 	QuotaKb       sql.NullInt64
 	QuotaUsageKb  sql.NullInt64
-	UNum          int64
-	USizeB        int64
 	DNum          int64
 	DSizeB        int64
 	UlNum         int64
@@ -64,8 +58,6 @@ func (q *Queries) AllNamespaces(ctx context.Context) ([]AllNamespacesRow, error)
 			&i.AllowanceTime,
 			&i.QuotaKb,
 			&i.QuotaUsageKb,
-			&i.UNum,
-			&i.USizeB,
 			&i.DNum,
 			&i.DSizeB,
 			&i.UlNum,
@@ -110,11 +102,10 @@ INSERT INTO
     allowance_time,
     quota_kb,
     quota_usage_kb,
-    usage_id,
     download_id,
     upload_id
   )
-  values(?, ?, ?, ?, ?, ?, ?, ?)
+  values(?, ?, ?, ?, ?, ?, ?)
   returning id
 `
 
@@ -124,7 +115,6 @@ type CreateNamespaceParams struct {
 	AllowanceTime sql.NullInt64
 	QuotaKb       sql.NullInt64
 	QuotaUsageKb  sql.NullInt64
-	UsageID       int64
 	DownloadID    int64
 	UploadID      int64
 }
@@ -136,7 +126,6 @@ func (q *Queries) CreateNamespace(ctx context.Context, arg CreateNamespaceParams
 		arg.AllowanceTime,
 		arg.QuotaKb,
 		arg.QuotaUsageKb,
-		arg.UsageID,
 		arg.DownloadID,
 		arg.UploadID,
 	)
@@ -173,15 +162,11 @@ SELECT
  ns.allowance_time,
  ns.quota_kb,
  ns.quota_usage_kb,
- u.num as u_num,
- u.size_b as u_size_b,
  d.num as d_num,
  d.size_b as d_size_b,
  ul.num as ul_num,
  ul.size_b as ul_size_b
  FROM namespace as ns
- JOIN file_stats as u
-  ON ns.usage_id = u.id
  JOIN file_stats as d
   ON ns.download_id = d.id
  JOIN file_stats as ul
@@ -196,8 +181,6 @@ type GetNamespaceByNameRow struct {
 	AllowanceTime sql.NullInt64
 	QuotaKb       sql.NullInt64
 	QuotaUsageKb  sql.NullInt64
-	UNum          int64
-	USizeB        int64
 	DNum          int64
 	DSizeB        int64
 	UlNum         int64
@@ -214,8 +197,6 @@ func (q *Queries) GetNamespaceByName(ctx context.Context, name string) (GetNames
 		&i.AllowanceTime,
 		&i.QuotaKb,
 		&i.QuotaUsageKb,
-		&i.UNum,
-		&i.USizeB,
 		&i.DNum,
 		&i.DSizeB,
 		&i.UlNum,
@@ -247,7 +228,7 @@ UPDATE namespace SET
  quota_kb = ?,
  quota_usage_kb = ?
  WHERE id = ?
- RETURNING usage_id, download_id, upload_id
+ RETURNING download_id, upload_id
 `
 
 type UpdateNamespaceParams struct {
@@ -260,7 +241,6 @@ type UpdateNamespaceParams struct {
 }
 
 type UpdateNamespaceRow struct {
-	UsageID    int64
 	DownloadID int64
 	UploadID   int64
 }
@@ -275,6 +255,6 @@ func (q *Queries) UpdateNamespace(ctx context.Context, arg UpdateNamespaceParams
 		arg.ID,
 	)
 	var i UpdateNamespaceRow
-	err := row.Scan(&i.UsageID, &i.DownloadID, &i.UploadID)
+	err := row.Scan(&i.DownloadID, &i.UploadID)
 	return i, err
 }

infrastructure/sqlite/namespace/repository.go

@@ -34,10 +34,9 @@ CREATE TABLE IF NOT EXISTS namespace(
   allowance_time BIGINT,
   quota_kb BIGINT,
   quota_usage_kb BIGINT,
-  usage_id BIGINT NOT NULL REFERENCES file_stats(Id),
   download_id BIGINT NOT NULL REFERENCES file_stats(Id),
   upload_id BIGINT NOT NULL REFERENCES file_stats(Id)
- );`
+);`
 	_, err = r.db.Exec(query)
 
 	return err
@@ -64,12 +63,6 @@ func (q *Queries) createFileStats(ctx context.Context, fstat namespace.FileStat)
 func (r *Repository) Create(ns namespace.Namespace) (*namespace.Namespace, error) {
 	ctx := context.Background()
 	q := New(r.db)
-	u_id, err := q.createFileStats(ctx, ns.Usage)
-
-	if err != nil {
-		return nil, err
-	}
-
 	dl_id, err := q.createFileStats(ctx, ns.Download)
 
 	if err != nil {
@@ -90,7 +83,6 @@ func (r *Repository) Create(ns namespace.Namespace) (*namespace.Namespace, error
 		AllowanceTime: sql.NullInt64{int64(ns.AllowanceDuration.Seconds()), true},
 		QuotaKb:       sql.NullInt64{int64(ns.FileQuota.AllowanceKB), true},
 		QuotaUsageKb:  sql.NullInt64{int64(ns.FileQuota.CurrentUsage), true},
-		UsageID:       u_id,
 		DownloadID:    dl_id,
 		UploadID:      ul_id,
 	}
@@ -122,7 +114,6 @@ func (r *Repository) All() ([]namespace.Namespace, error) {
 			time.UnixMicro(row.Lastseen),
 			time.Duration(row.AllowanceTime.Int64 * int64(time.Second)),
 			namespace.FileSizeQuota{row.QuotaKb.Int64, row.QuotaUsageKb.Int64},
-			namespace.FileStat{row.UNum, row.USizeB},
 			namespace.FileStat{row.DNum, row.DSizeB},
 			namespace.FileStat{row.UlNum, row.UlSizeB},
 		}
@@ -148,7 +139,6 @@ func (r *Repository) GetByName(name string) (*namespace.Namespace, error) {
 		time.UnixMicro(row.Lastseen),
 		time.Duration(row.AllowanceTime.Int64 * int64(time.Second)),
 		namespace.FileSizeQuota{row.QuotaKb.Int64, row.QuotaUsageKb.Int64},
-		namespace.FileStat{row.UNum, row.USizeB},
 		namespace.FileStat{row.DNum, row.DSizeB},
 		namespace.FileStat{row.UlNum, row.UlSizeB},
 	}
@@ -173,11 +163,6 @@ func (r *Repository) Update(id int64, ns namespace.Namespace) (*namespace.Namesp
 		ns.ID,
 	})
 
-	err = q.updateFileStat(ctx, ids.UsageID, ns.Usage)
-	if err != nil {
-		return nil, err
-	}
-
 	err = q.updateFileStat(ctx, ids.DownloadID, ns.Download)
 	if err != nil {
 		return nil, err

infrastructure/sqlite/namespace/schema.sql

@@ -11,7 +11,6 @@ CREATE TABLE IF NOT EXISTS namespace(
   allowance_time BIGINT,
   quota_kb BIGINT,
   quota_usage_kb BIGINT,
-  usage_id BIGINT NOT NULL REFERENCES file_stats(Id) ON DELETE CASCADE,
   download_id BIGINT NOT NULL REFERENCES file_stats(Id) ON DELETE CASCADE,
   upload_id BIGINT NOT NULL REFERENCES file_stats(Id) ON DELETE CASCADE
  );

infrastructure/system_time/clock.go

@@ -0,0 +1,9 @@
+package system_time
+
+import "time"
+
+type Clock struct{}
+
+func (c Clock) Now() time.Time {
+	return time.Now()
+}

server/bog.go

@@ -6,6 +6,8 @@ import (
 	"caj-larsson/bog/dataswamp/swampfile"
 	fs_swampfile "caj-larsson/bog/infrastructure/fs/swampfile"
 	sql_namespace "caj-larsson/bog/infrastructure/sqlite/namespace"
+	"caj-larsson/bog/infrastructure/system_time"
+	"caj-larsson/bog/util"
 	"net/http"
 	"strconv"
 	"text/template"
@@ -20,10 +22,10 @@ type Router interface {
 type Bog struct {
 	router       Router
 	adminRouter  Router
-	file_service dataswamp.SwampFileService
+	file_service dataswamp.DataSwampService
 	address      string
 	adminAddress string
-	logger       dataswamp.Logger
+	logger       util.Logger
 }
 
 func buildFileDataRepository(config FileConfig) swampfile.Repository {
@@ -104,7 +106,7 @@ func (b *Bog) dashboardHandler(w http.ResponseWriter, r *http.Request) {
 		panic(err)
 	}
 
-	stats, _ := b.file_service.NamespaceStats()
+	stats := b.file_service.NamespaceStats()
 	err = templ.Execute(w, stats)
 
 	if err != nil {
@@ -114,7 +116,7 @@ func (b *Bog) dashboardHandler(w http.ResponseWriter, r *http.Request) {
 
 func (b *Bog) routes() {
 	b.router.HandleFunc("/", b.fileHandler)
-	b.adminRouter.HandleFunc("/", b.dashboardHandler)
+	//	b.adminRouter.HandleFunc("/", b.dashboardHandler)
 }
 
 func (b *Bog) cleanNamespaces() {
@@ -133,11 +135,17 @@ func New(config *Configuration) *Bog {
 	nsRepo := buildNamespaceRepository(config.Database)
 
 	logger := ServerLogger{Debug}
-	b.file_service = dataswamp.NewSwampFileService(
+	ns_svc := namespace.NewNamespaceService(
 		nsRepo,
-		fsSwampRepo,
-		config.Quota.ParsedSizeBytes(),
+		logger,
+		system_time.Clock{},
 		config.Quota.ParsedDuration(),
+		config.Quota.ParsedSizeBytes(),
+	)
+
+	b.file_service = *dataswamp.NewDataSwampService(
+		*ns_svc,
+		fsSwampRepo,
 		logger,
 	)
 	b.logger = logger
@@ -150,6 +158,6 @@ func New(config *Configuration) *Bog {
 func (b *Bog) Run() {
 	b.logger.Info("Starting bog on address: %s", b.address)
 	go b.cleanNamespaces()
-	go func(){ http.ListenAndServe(b.adminAddress, b.adminRouter) }()
+	go func() { http.ListenAndServe(b.adminAddress, b.adminRouter) }()
 	http.ListenAndServe(b.address, b.router)
 }

server/bog_test.go

@@ -4,8 +4,10 @@ import (
 	"testing"
 	//	"fmt"
 	"caj-larsson/bog/dataswamp"
-	"caj-larsson/bog/infrastructure/memory/namespace"
+	"caj-larsson/bog/dataswamp/namespace"
+	ns "caj-larsson/bog/infrastructure/memory/namespace"
 	"caj-larsson/bog/infrastructure/memory/swampfile"
+	"caj-larsson/bog/infrastructure/system_time"
 	"github.com/matryer/is"
 	"net/http"
 	"net/http/httptest"
@@ -22,17 +24,25 @@ func (t TestLogger) Warn(format string, a ...interface{})  {}
 func TestApplication(t *testing.T) {
 	is := is.New(t)
 	logger := TestLogger{}
-	file_service := dataswamp.NewSwampFileService(
-		namespace.NewRepository(),
-		swampfile.NewRepository(),
-		1000,
+	nsRepo := ns.NewRepository()
+
+	ns_svc := namespace.NewNamespaceService(
+		nsRepo,
+		logger,
+		system_time.Clock{},
 		time.Hour,
+		1000,
+	)
+
+	file_service := dataswamp.NewDataSwampService(
+		*ns_svc,
+		swampfile.NewRepository(),
 		logger,
 	)
 
 	bog := Bog{
 		router:       new(http.ServeMux),
-		file_service: file_service,
+		file_service: *file_service,
 		address:      "fake",
 		logger:       logger,
 	}

util/event.go

@@ -0,0 +1,41 @@
+package util
+
+type Event struct {
+	eventName string
+	payload   interface{}
+}
+
+func NewEvent(eventName string, payload interface{}) *Event {
+	return &Event{
+		eventName,
+		payload,
+	}
+}
+
+func (e *Event) EventName() string {
+	return e.eventName
+}
+
+func (e *Event) Payload() interface{} {
+	return e.payload
+}
+
+type EventHandler func(payload interface{})
+
+type EventBus struct {
+	handlers map[string][]EventHandler
+}
+
+func NewEventBus() *EventBus {
+	return &EventBus{make(map[string][]EventHandler)}
+}
+
+func (eb *EventBus) Register(eventName string, handler EventHandler) {
+	eb.handlers[eventName] = append(eb.handlers[eventName], handler)
+}
+
+func (eb *EventBus) Handle(e Event) {
+	for _, handler := range eb.handlers[e.EventName()] {
+		handler(e.Payload())
+	}
+}

util/eventbus_contract.go

@@ -0,0 +1,23 @@
+package util
+
+import (
+	"github.com/matryer/is"
+	"testing"
+)
+
+func (eb *EventBus) Handled(e Event) bool {
+	// TODO: figure out how to verify the event signature here.
+	handlers, exists := eb.handlers[e.EventName()]
+	if !exists {
+		return false
+	}
+
+	return len(handlers) > 0
+}
+
+func AcceptsMessage(t *testing.T, eb *EventBus, es []Event) {
+	is := is.New(t)
+	for _, e := range es {
+		is.True(eb.Handled(e))
+	}
+}

util/logging.go

@@ -0,0 +1,13 @@
+package util
+
+type Logger interface {
+	Debug(format string, a ...interface{})
+	Info(format string, a ...interface{})
+	Warn(format string, a ...interface{})
+}
+
+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{})  {}