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feat: add projection layer to eventstore

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This commit is contained in:
Jon Lundy
2022-09-06 10:35:14 -06:00
parent f65e9ca666
commit 063dca997f
24 changed files with 493 additions and 220 deletions
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30
pkg/es/driver/mem-store/mem-store.go
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@@ -4,7 +4,7 @@ import (
"context"
"fmt"
"github.com/sour-is/ev/internal/logz"
"github.com/sour-is/ev/internal/lg"
"github.com/sour-is/ev/pkg/es"
"github.com/sour-is/ev/pkg/es/driver"
"github.com/sour-is/ev/pkg/es/event"
@@ -26,30 +26,30 @@ type memstore struct {
const AppendOnly = es.AppendOnly
const AllEvents = es.AllEvents
func Init(ctx context.Context) {
ctx, span := logz.Span(ctx)
func Init(ctx context.Context) error {
ctx, span := lg.Span(ctx)
defer span.End()
es.Register(ctx, "mem", &memstore{})
return es.Register(ctx, "mem", &memstore{})
}
var _ driver.Driver = (*memstore)(nil)
func (memstore) Open(ctx context.Context, name string) (driver.Driver, error) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
s := &state{streams: make(map[string]*locker.Locked[event.Events])}
return &memstore{locker.New(s)}, nil
}
func (m *memstore) EventLog(ctx context.Context, streamID string) (driver.EventLog, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
el := &eventLog{streamID: streamID}
err := m.state.Modify(ctx, func(state *state) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
l, ok := state.streams[streamID]
@@ -70,16 +70,16 @@ var _ driver.EventLog = (*eventLog)(nil)
// Append implements driver.EventStore
func (m *eventLog) Append(ctx context.Context, events event.Events, version uint64) (uint64, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
event.SetStreamID(m.streamID, events...)
return uint64(len(events)), m.events.Modify(ctx, func(stream *event.Events) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
span.AddEvent(fmt.Sprintf(" %s %#v %d", m.streamID, stream, len(*stream)))
span.AddEvent(fmt.Sprintf(" %s %d", m.streamID, len(*stream)))
last := uint64(len(*stream))
if version != AppendOnly && version != last {
@@ -100,16 +100,16 @@ func (m *eventLog) Append(ctx context.Context, events event.Events, version uint
// Read implements driver.EventStore
func (m *eventLog) Read(ctx context.Context, pos int64, count int64) (event.Events, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
var events event.Events
err := m.events.Modify(ctx, func(stream *event.Events) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
span.AddEvent(fmt.Sprintf(" %s %#v %d", m.streamID, stream, len(*stream)))
span.AddEvent(fmt.Sprintf("%s %d", m.streamID, len(*stream)))
first := stream.First().EventMeta().Position
last := stream.Last().EventMeta().Position
@@ -154,7 +154,7 @@ func (m *eventLog) Read(ctx context.Context, pos int64, count int64) (event.Even
// FirstIndex for the streamID
func (m *eventLog) FirstIndex(ctx context.Context) (uint64, error) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
events, err := m.events.Copy(ctx)
@@ -163,7 +163,7 @@ func (m *eventLog) FirstIndex(ctx context.Context) (uint64, error) {
// LastIndex for the streamID
func (m *eventLog) LastIndex(ctx context.Context) (uint64, error) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
events, err := m.events.Copy(ctx)