sour-is/ev
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

feat: add projection layer to eventstore

Browse Source
This commit is contained in:
Jon Lundy 2022-09-06 10:35:14 -06:00
parent f65e9ca666
commit 063dca997f
Signed by untrusted user who does not match committer: xuu
GPG Key ID: C63E6D61F3035024
24 changed files with 493 additions and 220 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Makefile
View File

@ -2,6 +2,7 @@ export PATH:=$(shell go env GOPATH)/bin:$(PATH)
export EV_DATA=mem:
export EV_HTTP=:8080
export EV_TRACE_SAMPLE=always
export EV_TRACE_ENDPOINT=localhost:4318
-include local.mk
air: gen

6
README.md
View File

@ -1,3 +1,5 @@
# ev
# ev - Eventsourcing Playground
Eventsourcing Playground
This project is learnings in building an eventstore and applications around it.
Feel free to explore.

6
app/gql/resolver.go
View File

@ -14,7 +14,7 @@ import (
"github.com/sour-is/ev/app/msgbus"
"github.com/sour-is/ev/app/salty"
"github.com/sour-is/ev/internal/graph/generated"
"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/gql"
"github.com/vektah/gqlparser/v2/gqlerror"
@ -27,7 +27,7 @@ type Resolver struct {
}
func New(ctx context.Context, resolvers ...interface{ RegisterHTTP(*http.ServeMux) }) (*Resolver, error) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
r := &Resolver{}
@ -90,7 +90,7 @@ func (r *Resolver) RegisterHTTP(mux *http.ServeMux) {
gql.SetRecoverFunc(NoopRecover)
gql.Use(otelgqlgen.Middleware())
mux.Handle("/", playground.Handler("GraphQL playground", "/gql"))
mux.Handle("/gql", logz.Htrace(r.ChainMiddlewares(gql), "gql"))
mux.Handle("/gql", lg.Htrace(r.ChainMiddlewares(gql), "gql"))
}
type noop struct{}

38
app/msgbus/service.go
View File

@ -12,7 +12,7 @@ import (
"time"
"github.com/gorilla/websocket"
"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/event"
"github.com/sour-is/ev/pkg/gql"
@ -35,7 +35,7 @@ type MsgbusResolver interface {
}
func New(ctx context.Context, es *es.EventStore) (*service, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
if err := event.Register(ctx, &PostEvent{}); err != nil {
@ -45,7 +45,7 @@ func New(ctx context.Context, es *es.EventStore) (*service, error) {
return nil, err
}
m := logz.Meter(ctx)
m := lg.Meter(ctx)
svc := &service{es: es}
@ -72,11 +72,11 @@ var upgrader = websocket.Upgrader{
}
func (s *service) RegisterHTTP(mux *http.ServeMux) {
mux.Handle("/inbox/", logz.Htrace(http.StripPrefix("/inbox/", s), "inbox"))
mux.Handle("/inbox/", lg.Htrace(http.StripPrefix("/inbox/", s), "inbox"))
}
func (s *service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
r = r.WithContext(ctx)
@ -97,7 +97,7 @@ func (s *service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// Posts is the resolver for the events field.
func (r *service) Posts(ctx context.Context, streamID string, paging *gql.PageInput) (*gql.Connection, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
r.Mresolver_posts.Add(ctx, 1)
@ -143,7 +143,7 @@ func (r *service) Posts(ctx context.Context, streamID string, paging *gql.PageIn
}
func (r *service) PostAdded(ctx context.Context, streamID string, after int64) (<-chan *PostEvent, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
r.Mresolver_post_added.Add(ctx, 1)
@ -162,15 +162,19 @@ func (r *service) PostAdded(ctx context.Context, streamID string, after int64) (
ch := make(chan *PostEvent)
go func() {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
{
ctx, span := lg.Fork(ctx)
defer func() {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
defer span.End()
ctx, cancel := context.WithTimeout(ctx, 1*time.Second)
defer cancel()
err := sub.Close(ctx)
span.RecordError(err)
}()
}
for sub.Recv(ctx) {
events, err := sub.Events(ctx)
@ -199,7 +203,7 @@ func (r *service) PostAdded(ctx context.Context, streamID string, after int64) (
func (s *service) get(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
name, _, _ := strings.Cut(r.URL.Path, "/")
@ -253,7 +257,7 @@ func (s *service) get(w http.ResponseWriter, r *http.Request) {
func (s *service) post(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
name, tags, _ := strings.Cut(r.URL.Path, "/")
@ -320,7 +324,7 @@ func (s *service) post(w http.ResponseWriter, r *http.Request) {
}
func (s *service) websocket(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
name, _, _ := strings.Cut(r.URL.Path, "/")
@ -381,12 +385,16 @@ func (s *service) websocket(w http.ResponseWriter, r *http.Request) {
span.RecordError(err)
return
}
{
ctx, span := lg.Fork(ctx)
defer func() {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
defer span.End()
ctx, cancel := context.WithTimeout(ctx, 1*time.Second)
defer cancel()
span.AddEvent("stop ws")
sub.Close(ctx)
err := sub.Close(ctx)
span.RecordError(err)
}()
}
span.AddEvent("start ws")
for sub.Recv(ctx) {

10
app/peerfinder/service.go
View File

@ -11,7 +11,7 @@ import (
ulid "github.com/oklog/ulid/v2"
contentnegotiation "gitlab.com/jamietanna/content-negotiation-go"
"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/event"
)
@ -28,7 +28,7 @@ type service struct {
}
func New(ctx context.Context, es *es.EventStore) (*service, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
if err := event.Register(ctx, &Request{}, &Result{}, &VersionChanged{}); err != nil {
@ -41,13 +41,13 @@ func New(ctx context.Context, es *es.EventStore) (*service, error) {
return svc, nil
}
func (s *service) RegisterHTTP(mux *http.ServeMux) {
mux.Handle("/peers/", logz.Htrace(s, "peers"))
mux.Handle("/peers/", lg.Htrace(s, "peers"))
}
func (s *service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
r = r.WithContext(ctx)
@ -90,7 +90,7 @@ func (s *service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
func (s *service) getPending(w http.ResponseWriter, r *http.Request, uuid string) {
ctx := r.Context()
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
info, err := es.Upsert(ctx, s.es, "pf-info", func(ctx context.Context, agg *Info) error {

6
app/salty/salty-addr.go
View File

@ -10,7 +10,7 @@ import (
"strings"
"github.com/keys-pub/keys"
"github.com/sour-is/ev/internal/logz"
"github.com/sour-is/ev/internal/lg"
)
// Config represents a Salty Config for a User which at a minimum is required
@ -79,7 +79,7 @@ func (a *Addr) DiscoveredDomain() string {
}
func (a *Addr) Refresh(ctx context.Context) error {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
span.AddEvent(fmt.Sprintf("Looking up SRV record for _salty._tcp.%s", a.Domain))
@ -118,7 +118,7 @@ func (a *Addr) Refresh(ctx context.Context) error {
}
func fetchConfig(ctx context.Context, addr string) (config Config, cap Capabilities, err error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
var req *http.Request

16
app/salty/service.go
View File

@ -12,7 +12,7 @@ import (
"strings"
"github.com/keys-pub/keys"
"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/event"
"github.com/sour-is/ev/pkg/gql"
@ -49,7 +49,7 @@ type SaltyResolver interface {
}
func New(ctx context.Context, es *es.EventStore, baseURL string) (*service, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
if err := event.Register(ctx, &UserRegistered{}); err != nil {
@ -59,7 +59,7 @@ func New(ctx context.Context, es *es.EventStore, baseURL string) (*service, erro
return nil, err
}
m := logz.Meter(ctx)
m := lg.Meter(ctx)
svc := &service{baseURL: baseURL, es: es, dns: net.DefaultResolver}
@ -93,7 +93,7 @@ func (s *service) BaseURL() string {
return s.baseURL
}
func (s *service) RegisterHTTP(mux *http.ServeMux) {
mux.Handle("/.well-known/salty/", logz.Htrace(s, "lookup"))
mux.Handle("/.well-known/salty/", lg.Htrace(s, "lookup"))
}
func (s *service) RegisterAPIv1(mux *http.ServeMux) {
mux.HandleFunc("/ping", s.apiv1)
@ -103,7 +103,7 @@ func (s *service) RegisterAPIv1(mux *http.ServeMux) {
}
func (s *service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
addr := "saltyuser-" + strings.TrimPrefix(r.URL.Path, "/.well-known/salty/")
@ -137,7 +137,7 @@ func (s *service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
}
}
func (s *service) CreateSaltyUser(ctx context.Context, nick string, pub string) (*SaltyUser, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
s.m_create_user.Add(ctx, 1)
@ -167,7 +167,7 @@ func (s *service) CreateSaltyUser(ctx context.Context, nick string, pub string)
return a, nil
}
func (s *service) SaltyUser(ctx context.Context, nick string) (*SaltyUser, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
s.m_get_user.Add(ctx, 1)
@ -200,7 +200,7 @@ func (s *service) GetMiddleware() func(http.Handler) http.Handler {
func (s *service) apiv1(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
switch r.Method {

5
env
View File

@ -1,5 +0,0 @@
SCRIPT_VERSION=1.1.0
REQ_ID=01GB0GDHCEAPMZFVES2KBCN7KF
REQ_IP=1.1.1.1
REQ_FAMILY=1
REQ_CREATED=2022-08-21 09:30:22

37
httpmux.go Normal file
View File

@ -0,0 +1,37 @@
package main
import (
"net/http"
"github.com/rs/cors"
)
type mux struct {
*http.ServeMux
api *http.ServeMux
}
func httpMux(fns ...interface{ RegisterHTTP(*http.ServeMux) }) http.Handler {
mux := newMux()
for _, fn := range fns {
fn.RegisterHTTP(mux.ServeMux)
if fn, ok := fn.(interface{ RegisterAPIv1(*http.ServeMux) }); ok {
fn.RegisterAPIv1(mux.api)
}
}
return cors.AllowAll().Handler(mux)
}
func newMux() *mux {
mux := &mux{
api: http.NewServeMux(),
ServeMux: http.NewServeMux(),
}
mux.Handle("/api/v1/", http.StripPrefix("/api/v1/", mux.api))
return mux
}
func (m mux) HandleAPIv1(pattern string, handler http.Handler) {
m.api.Handle(pattern, handler)
}

2
internal/logz/init.go → internal/lg/init.go
View File

@ -1,4 +1,4 @@
package logz
package lg
import (
"context"

4
internal/logz/logger.go → internal/lg/logger.go
View File

@ -1,4 +1,4 @@
package logz
package lg
import (
"bytes"
@ -72,7 +72,7 @@ func initLogger(name string) func() error {
l, err := logzio.New(
token.Secret(),
// logzio.SetDebug(os.Stderr),
logzio.SetUrl(env("LOGZIO_LOG_URL", "https://listener.logz.io:8071")),
logzio.SetUrl(env("LOGZIO_LOG_URL", "https://listener.lg.io:8071")),
logzio.SetDrainDuration(time.Second*5),
logzio.SetTempDirectory(env("LOGZIO_DIR", os.TempDir())),
logzio.SetCheckDiskSpace(true),

2
internal/logz/metric.go → internal/lg/metric.go
View File

@ -1,4 +1,4 @@
package logz
package lg
import (
"context"

23
internal/logz/tracer.go → internal/lg/tracer.go
View File

@ -1,4 +1,4 @@
package logz
package lg
import (
"context"
@ -33,10 +33,10 @@ func Tracer(ctx context.Context) trace.Tracer {
return otel.Tracer("")
}
func Span(ctx context.Context, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
func attrs(ctx context.Context) (string, []attribute.KeyValue) {
var attrs []attribute.KeyValue
var name string
if pc, file, line, ok := runtime.Caller(1); ok {
if pc, file, line, ok := runtime.Caller(2); ok {
if fn := runtime.FuncForPC(pc); fn != nil {
name = fn.Name()
}
@ -47,12 +47,29 @@ func Span(ctx context.Context, opts ...trace.SpanStartOption) (context.Context,
attribute.String("name", name),
)
}
return name, attrs
}
func Span(ctx context.Context, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
name, attrs := attrs(ctx)
ctx, span := Tracer(ctx).Start(ctx, name, opts...)
span.SetAttributes(attrs...)
return ctx, span
}
func Fork(ctx context.Context, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
name, attrs := attrs(ctx)
childCTX, childSpan := Tracer(ctx).Start(context.Background(), name, append(opts, trace.WithLinks(trace.LinkFromContext(ctx)))...)
childSpan.SetAttributes(attrs...)
_, span := Tracer(ctx).Start(ctx, name, append(opts, trace.WithLinks(trace.LinkFromContext(childCTX)))...)
span.SetAttributes(attrs...)
defer span.End()
return childCTX, childSpan
}
type SampleRate string
const (

93
main.go
View File

@ -1,9 +1,7 @@
package main
import (
"bytes"
"context"
"fmt"
"log"
"net/http"
"os"
@ -12,18 +10,21 @@ import (
"strings"
"time"
"github.com/rs/cors"
"go.uber.org/multierr"
"golang.org/x/sync/errgroup"
"github.com/sour-is/ev/app/gql"
"github.com/sour-is/ev/app/msgbus"
"github.com/sour-is/ev/app/peerfinder"
"github.com/sour-is/ev/app/salty"
"github.com/sour-is/ev/internal/logz"
"github.com/sour-is/ev/internal/lg"
"github.com/sour-is/ev/pkg/es"
diskstore "github.com/sour-is/ev/pkg/es/driver/disk-store"
memstore "github.com/sour-is/ev/pkg/es/driver/mem-store"
"github.com/sour-is/ev/pkg/es/driver/projecter"
"github.com/sour-is/ev/pkg/es/driver/streamer"
"github.com/sour-is/ev/pkg/es/event"
"github.com/sour-is/ev/pkg/set"
)
const AppName string = "sour.is-ev"
@ -35,7 +36,7 @@ func main() {
defer cancel()
}()
ctx, stop := logz.Init(ctx, AppName)
ctx, stop := lg.Init(ctx, AppName)
defer stop()
if err := run(ctx); err != nil && err != http.ErrServerClosed {
@ -46,12 +47,20 @@ func run(ctx context.Context) error {
g, ctx := errgroup.WithContext(ctx)
{
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
diskstore.Init(ctx)
memstore.Init(ctx)
err := multierr.Combine(
es.Init(ctx),
event.Init(ctx),
diskstore.Init(ctx),
memstore.Init(ctx),
)
if err != nil {
span.RecordError(err)
return err
}
es, err := es.Open(ctx, env("EV_DATA", "file:data"), streamer.New(ctx))
es, err := es.Open(ctx, env("EV_DATA", "mem:"), streamer.New(ctx), projecter.New(ctx))
if err != nil {
span.RecordError(err)
return err
@ -65,7 +74,7 @@ func run(ctx context.Context) error {
s.Addr = "[::]" + s.Addr
}
enable := set(strings.Fields(env("EV_ENABLE", "salty msgbus gql peers"))...)
enable := set.New(strings.Fields(env("EV_ENABLE", "salty msgbus gql peers"))...)
var svcs []interface{ RegisterHTTP(*http.ServeMux) }
svcs = append(svcs, es)
@ -109,14 +118,14 @@ func run(ctx context.Context) error {
}
svcs = append(svcs, gql)
}
svcs = append(svcs, logz.NewHTTP(ctx))
svcs = append(svcs, lg.NewHTTP(ctx))
s.Handler = httpMux(svcs...)
log.Print("Listen on ", s.Addr)
span.AddEvent("begin listen and serve")
span.AddEvent("begin listen and serve on " + s.Addr)
Mup, err := logz.Meter(ctx).SyncInt64().UpDownCounter("up")
Mup, err := lg.Meter(ctx).SyncInt64().UpDownCounter("up")
if err != nil {
return err
}
@ -149,61 +158,3 @@ func env(name, defaultValue string) string {
log.Println("#", name, "=", defaultValue, "(default)")
return defaultValue
}
func httpMux(fns ...interface{ RegisterHTTP(*http.ServeMux) }) http.Handler {
mux := newMux()
for _, fn := range fns {
fn.RegisterHTTP(mux.ServeMux)
if fn, ok := fn.(interface{ RegisterAPIv1(*http.ServeMux) }); ok {
fn.RegisterAPIv1(mux.api)
}
}
return cors.AllowAll().Handler(mux)
}
type Set[T comparable] map[T]struct{}
func set[T comparable](items ...T) Set[T] {
s := make(map[T]struct{}, len(items))
for i := range items {
s[items[i]] = struct{}{}
}
return s
}
func (s Set[T]) Has(v T) bool {
_, ok := (s)[v]
return ok
}
func (s Set[T]) String() string {
if s == nil {
return "set(<nil>)"
}
lis := make([]string, 0, len(s))
for k := range s {
lis = append(lis, fmt.Sprint(k))
}
var b bytes.Buffer
b.WriteString("set(")
b.WriteString(strings.Join(lis, ","))
b.WriteString(")")
return b.String()
}
type mux struct {
*http.ServeMux
api *http.ServeMux
}
func newMux() *mux {
mux := &mux{
api: http.NewServeMux(),
ServeMux: http.NewServeMux(),
}
mux.Handle("/api/v1/", http.StripPrefix("/api/v1/", mux.api))
return mux
}
func (m mux) HandleAPIv1(pattern string, handler http.Handler) {
m.api.Handle(pattern, handler)
}

28
pkg/es/driver/disk-store/disk-store.go
View File

@ -11,7 +11,7 @@ import (
"go.opentelemetry.io/otel/metric/instrument/syncint64"
"go.uber.org/multierr"
"github.com/sour-is/ev/internal/logz"
"github.com/sour-is/ev/internal/lg"
"github.com/sour-is/ev/pkg/cache"
"github.com/sour-is/ev/pkg/es"
"github.com/sour-is/ev/pkg/es/driver"
@ -38,10 +38,10 @@ const AppendOnly = es.AppendOnly
const AllEvents = es.AllEvents
func Init(ctx context.Context) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
m := logz.Meter(ctx)
m := lg.Meter(ctx)
var err, errs error
Mdisk_open, err := m.SyncInt64().Counter("disk_open")
@ -61,7 +61,7 @@ func Init(ctx context.Context) error {
var _ driver.Driver = (*diskStore)(nil)
func (d *diskStore) Open(ctx context.Context, dsn string) (driver.Driver, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
d.Mdisk_open.Add(ctx, 1)
@ -82,11 +82,11 @@ func (d *diskStore) Open(ctx context.Context, dsn string) (driver.Driver, error)
}
}
c, err := cache.NewWithEvict(CachSize, func(ctx context.Context, s string, l *lockedWal) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
l.Modify(ctx, func(w *wal.Log) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
d.Mdisk_evict.Add(ctx, 1)
@ -112,13 +112,13 @@ func (d *diskStore) Open(ctx context.Context, dsn string) (driver.Driver, error)
}, nil
}
func (d *diskStore) EventLog(ctx context.Context, streamID string) (driver.EventLog, error) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
el := &eventLog{streamID: streamID}
return el, d.openlogs.Modify(ctx, func(openlogs *openlogs) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
if events, ok := openlogs.logs.Get(streamID); ok {
@ -145,14 +145,14 @@ type eventLog struct {
var _ driver.EventLog = (*eventLog)(nil)
func (e *eventLog) Append(ctx context.Context, events event.Events, version uint64) (uint64, error) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
event.SetStreamID(e.streamID, events...)
var count uint64
err := e.events.Modify(ctx, func(l *wal.Log) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
last, err := l.LastIndex()
@ -190,13 +190,13 @@ func (e *eventLog) Append(ctx context.Context, events event.Events, version uint
return count, err
}
func (e *eventLog) Read(ctx context.Context, pos, count int64) (event.Events, error) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
var events event.Events
err := e.events.Modify(ctx, func(stream *wal.Log) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
first, err := stream.FirstIndex()
@ -259,7 +259,7 @@ func (e *eventLog) Read(ctx context.Context, pos, count int64) (event.Events, er
return events, nil
}
func (e *eventLog) FirstIndex(ctx context.Context) (uint64, error) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
var idx uint64
@ -273,7 +273,7 @@ func (e *eventLog) FirstIndex(ctx context.Context) (uint64, error) {
return idx, err
}
func (e *eventLog) LastIndex(ctx context.Context) (uint64, error) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
var idx uint64

30
pkg/es/driver/mem-store/mem-store.go
View File

@ -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)

127
pkg/es/driver/projecter/projecter.go Normal file
View File

@ -0,0 +1,127 @@
package projecter
import (
"context"
"strings"
"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"
)
type projector struct {
up driver.Driver
}
func New(ctx context.Context) *projector {
return &projector{}
}
func (p *projector) Apply(e *es.EventStore) {
p.up = e.Driver
e.Driver = p
}
func (s *projector) Unwrap() driver.Driver {
return s.up
}
func (s *projector) Open(ctx context.Context, dsn string) (driver.Driver, error) {
ctx, span := lg.Span(ctx)
defer span.End()
return s.up.Open(ctx, dsn)
}
func (s *projector) EventLog(ctx context.Context, streamID string) (driver.EventLog, error) {
ctx, span := lg.Span(ctx)
defer span.End()
l, err := s.up.EventLog(ctx, streamID)
return &wrapper{l, s}, err
}
type wrapper struct {
up driver.EventLog
projector *projector
}
var _ driver.EventLog = (*wrapper)(nil)
func (w *wrapper) Read(ctx context.Context, pos int64, count int64) (event.Events, error) {
ctx, span := lg.Span(ctx)
defer span.End()
return w.up.Read(ctx, pos, count)
}
func (w *wrapper) Append(ctx context.Context, events event.Events, version uint64) (uint64, error) {
ctx, span := lg.Span(ctx)
defer span.End()
i, err := w.up.Append(ctx, events, version)
if err != nil {
return i, err
}
{
ctx, span := lg.Fork(ctx)
go func() {
defer span.End()
var pevents []event.Event
for i := range events {
e := events[i]
eventType := event.TypeOf(e)
streamID := e.EventMeta().StreamID
streamPos := e.EventMeta().Position
e1 := event.NewPtr(streamID, streamPos)
event.SetStreamID("$all", e1)
e2 := event.NewPtr(streamID, streamPos)
event.SetStreamID("$type-"+eventType, e2)
e3 := event.NewPtr(streamID, streamPos)
pkg, _, _ := strings.Cut(eventType, ".")
event.SetStreamID("$pkg-"+pkg, e3)
pevents = append(
pevents,
e1,
e2,
e3,
)
}
for i := range pevents {
e := pevents[i]
l, err := w.projector.up.EventLog(ctx, event.StreamID(e).StreamID())
if err != nil {
span.RecordError(err)
continue
}
_, err = l.Append(ctx, event.NewEvents(e), es.AppendOnly)
span.RecordError(err)
}
}()
}
return i, err
}
func (w *wrapper) FirstIndex(ctx context.Context) (uint64, error) {
ctx, span := lg.Span(ctx)
defer span.End()
return w.up.FirstIndex(ctx)
}
func (w *wrapper) LastIndex(ctx context.Context) (uint64, error) {
ctx, span := lg.Span(ctx)
defer span.End()
return w.up.LastIndex(ctx)
}
func (w *wrapper) LoadForUpdate(ctx context.Context, a event.Aggregate, fn func(context.Context, event.Aggregate) error) (uint64, error) {
ctx, span := lg.Span(ctx)
defer span.End()
return w.up.LoadForUpdate(ctx, a, fn)
}

71
pkg/es/driver/streamer/streamer.go
View File

@ -2,12 +2,15 @@ package streamer
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"
"github.com/sour-is/ev/pkg/locker"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
type state struct {
@ -20,7 +23,7 @@ type streamer struct {
}
func New(ctx context.Context) *streamer {
ctx, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
return &streamer{state: locker.New(&state{subscribers: map[string][]*subscription{}})}
@ -39,13 +42,13 @@ func (s *streamer) Unwrap() driver.Driver {
var _ driver.Driver = (*streamer)(nil)
func (s *streamer) Open(ctx context.Context, dsn string) (driver.Driver, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
return s.up.Open(ctx, dsn)
}
func (s *streamer) EventLog(ctx context.Context, streamID string) (driver.EventLog, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
l, err := s.up.EventLog(ctx, streamID)
@ -55,7 +58,7 @@ func (s *streamer) EventLog(ctx context.Context, streamID string) (driver.EventL
var _ driver.EventStream = (*streamer)(nil)
func (s *streamer) Subscribe(ctx context.Context, streamID string, start int64) (driver.Subscription, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
events, err := s.up.EventLog(ctx, streamID)
@ -75,22 +78,24 @@ func (s *streamer) Subscribe(ctx context.Context, streamID string, start int64)
})
}
func (s *streamer) Send(ctx context.Context, streamID string, events event.Events) error {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
return s.state.Modify(ctx, func(state *state) error {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
span.AddEvent(fmt.Sprint("subscribers=", len(state.subscribers[streamID])))
for _, sub := range state.subscribers[streamID] {
err := sub.position.Modify(ctx, func(position *position) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
position.size = int64(events.Last().EventMeta().Position - uint64(position.idx))
if position.wait != nil {
close(position.wait)
position.link = trace.LinkFromContext(ctx, attribute.String("src", "event"))
position.wait = nil
}
return nil
@ -102,17 +107,16 @@ func (s *streamer) Send(ctx context.Context, streamID string, events event.Event
return nil
})
}
func (s *streamer) delete(streamID string, sub *subscription) func(context.Context) error {
return func(ctx context.Context) error {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
if err := ctx.Err(); err != nil {
return err
}
return s.state.Modify(ctx, func(state *state) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
lis := state.subscribers[streamID]
@ -138,44 +142,53 @@ type wrapper struct {
var _ driver.EventLog = (*wrapper)(nil)
func (w *wrapper) Read(ctx context.Context, pos int64, count int64) (event.Events, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
return w.up.Read(ctx, pos, count)
}
func (w *wrapper) Append(ctx context.Context, events event.Events, version uint64) (uint64, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
i, err := w.up.Append(ctx, events, version)
if err != nil {
return i, err
}
return i, w.streamer.Send(ctx, w.topic, events)
}
ctx, span = lg.Fork(ctx)
go func() {
defer span.End()
err := w.streamer.Send(ctx, w.topic, events)
span.RecordError(err)
}()
return i, nil
}
func (w *wrapper) FirstIndex(ctx context.Context) (uint64, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
return w.up.FirstIndex(ctx)
}
func (w *wrapper) LastIndex(ctx context.Context) (uint64, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
return w.up.LastIndex(ctx)
}
func (w *wrapper) LoadForUpdate(ctx context.Context, a event.Aggregate, fn func(context.Context, event.Aggregate) error) (uint64, error) {
ctx, span := lg.Span(ctx)
defer span.End()
return w.up.LoadForUpdate(ctx, a, fn)
}
type position struct {
size int64
idx int64
link trace.Link
wait chan struct{}
}
@ -189,13 +202,13 @@ type subscription struct {
}
func (s *subscription) Recv(ctx context.Context) bool {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
var wait func(context.Context) bool
err := s.position.Modify(ctx, func(position *position) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
if position.size == es.AllEvents {
@ -204,11 +217,17 @@ func (s *subscription) Recv(ctx context.Context) bool {
if position.size == 0 {
position.wait = make(chan struct{})
wait = func(ctx context.Context) bool {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
select {
case <-position.wait:
if position.link.SpanContext.IsValid() {
_, span := lg.Span(ctx, trace.WithLinks(position.link))
span.AddEvent("recv event")
span.End()
position.link = trace.Link{}
}
return true
case <-ctx.Done():
@ -232,12 +251,12 @@ func (s *subscription) Recv(ctx context.Context) bool {
return true
}
func (s *subscription) Events(ctx context.Context) (event.Events, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
var events event.Events
return events, s.position.Modify(ctx, func(position *position) error {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
var err error
@ -253,7 +272,7 @@ func (s *subscription) Events(ctx context.Context) (event.Events, error) {
})
}
func (s *subscription) Close(ctx context.Context) error {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
return s.unsub(ctx)

40
pkg/es/es.go
View File

@ -6,7 +6,7 @@ import (
"fmt"
"strings"
"github.com/sour-is/ev/internal/logz"
"github.com/sour-is/ev/internal/lg"
"github.com/sour-is/ev/pkg/es/driver"
"github.com/sour-is/ev/pkg/es/event"
"github.com/sour-is/ev/pkg/locker"
@ -25,11 +25,8 @@ var (
drivers = locker.New(&config{drivers: make(map[string]driver.Driver)})
)
func Register(ctx context.Context, name string, d driver.Driver) error {
ctx, span := logz.Span(ctx)
defer span.End()
m := logz.Meter(ctx)
func Init(ctx context.Context) error {
m := lg.Meter(ctx)
var err, errs error
Mes_open, err = m.SyncInt64().Counter("es_open")
@ -47,15 +44,20 @@ func Register(ctx context.Context, name string, d driver.Driver) error {
Mes_append, err = m.SyncInt64().Counter("es_append")
errs = multierr.Append(errs, err)
err = drivers.Modify(ctx, func(c *config) error {
return errs
}
func Register(ctx context.Context, name string, d driver.Driver) error {
ctx, span := lg.Span(ctx)
defer span.End()
return drivers.Modify(ctx, func(c *config) error {
if _, set := c.drivers[name]; set {
return fmt.Errorf("driver %s already set", name)
}
c.drivers[name] = d
return nil
})
return multierr.Append(errs, err)
}
type EventStore struct {
@ -71,7 +73,7 @@ var (
)
func Open(ctx context.Context, dsn string, options ...Option) (*EventStore, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
Mes_open.Add(ctx, 1)
@ -107,7 +109,7 @@ type Option interface {
}
func (es *EventStore) Save(ctx context.Context, agg event.Aggregate) (uint64, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
events := agg.Events(true)
@ -131,7 +133,7 @@ func (es *EventStore) Save(ctx context.Context, agg event.Aggregate) (uint64, er
return count, err
}
func (es *EventStore) Load(ctx context.Context, agg event.Aggregate) error {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
Mes_load.Add(ctx, 1)
@ -151,7 +153,7 @@ func (es *EventStore) Load(ctx context.Context, agg event.Aggregate) error {
return nil
}
func (es *EventStore) Read(ctx context.Context, streamID string, pos, count int64) (event.Events, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
Mes_read.Add(ctx, 1)
@ -163,7 +165,7 @@ func (es *EventStore) Read(ctx context.Context, streamID string, pos, count int6
return l.Read(ctx, pos, count)
}
func (es *EventStore) Append(ctx context.Context, streamID string, events event.Events) (uint64, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
Mes_append.Add(ctx, 1)
@ -175,7 +177,7 @@ func (es *EventStore) Append(ctx context.Context, streamID string, events event.
return l.Append(ctx, events, AppendOnly)
}
func (es *EventStore) FirstIndex(ctx context.Context, streamID string) (uint64, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
l, err := es.Driver.EventLog(ctx, streamID)
@ -185,7 +187,7 @@ func (es *EventStore) FirstIndex(ctx context.Context, streamID string) (uint64,
return l.FirstIndex(ctx)
}
func (es *EventStore) LastIndex(ctx context.Context, streamID string) (uint64, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
l, err := es.Driver.EventLog(ctx, streamID)
@ -231,7 +233,7 @@ type PE[T any] interface {
// Create uses fn to create a new aggregate and store in db.
func Create[A any, T PA[A]](ctx context.Context, es *EventStore, streamID string, fn func(context.Context, T) error) (agg T, err error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
agg = new(A)
@ -261,7 +263,7 @@ func Create[A any, T PA[A]](ctx context.Context, es *EventStore, streamID string
// Update uses fn to update an exsisting aggregate and store in db.
func Update[A any, T PA[A]](ctx context.Context, es *EventStore, streamID string, fn func(context.Context, T) error) (agg T, err error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
agg = new(A)
@ -288,7 +290,7 @@ func Update[A any, T PA[A]](ctx context.Context, es *EventStore, streamID string
// Update uses fn to update an exsisting aggregate and store in db.
func Upsert[A any, T PA[A]](ctx context.Context, es *EventStore, streamID string, fn func(context.Context, T) error) (agg T, err error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
agg = new(A)

64
pkg/es/event/events.go
View File

@ -1,11 +1,13 @@
package event
import (
"context"
"crypto/rand"
"encoding"
"encoding/json"
"fmt"
"io"
"strconv"
"strings"
"sync"
"time"
@ -129,6 +131,10 @@ func (m Meta) Created() time.Time {
}
func (m Meta) GetEventID() string { return m.EventID.String() }
func Init(ctx context.Context) error {
return Register(ctx, NilEvent, &eventPtr{})
}
type nilEvent struct{}
func (*nilEvent) EventMeta() Meta {
@ -144,3 +150,61 @@ func (e *nilEvent) MarshalBinary() ([]byte, error) {
func (e *nilEvent) UnmarshalBinary(b []byte) error {
return json.Unmarshal(b, e)
}
type eventPtr struct {
streamID string
pos uint64
eventMeta Meta
}
var _ Event = (*eventPtr)(nil)
func NewPtr(streamID string, pos uint64) *eventPtr {
return &eventPtr{streamID: streamID, pos: pos}
}
// MarshalBinary implements Event
func (e *eventPtr) MarshalBinary() (data []byte, err error) {
return []byte(fmt.Sprintf("%s@%d", e.streamID, e.pos)), nil
}
// UnmarshalBinary implements Event
func (e *eventPtr) UnmarshalBinary(data []byte) error {
s := string(data)
idx := strings.LastIndex(s, "@")
if idx == -1 {
return fmt.Errorf("missing @ in: %s", s)
}
e.streamID = s[:idx]
var err error
e.pos, err = strconv.ParseUint(s[idx+1:], 10, 64)
return err
}
// EventMeta implements Event
func (e *eventPtr) EventMeta() Meta {
if e == nil {
return Meta{}
}
return e.eventMeta
}
// SetEventMeta implements Event
func (e *eventPtr) SetEventMeta(m Meta) {
if e == nil {
return
}
e.eventMeta = m
}
func (e *eventPtr) Values() any {
return struct {
StreamID string `json:"stream_id"`
Pos uint64 `json:"pos"`
}{
e.streamID,
e.pos,
}
}

22
pkg/es/event/reflect.go
View File

@ -9,7 +9,7 @@ import (
"reflect"
"strings"
"github.com/sour-is/ev/internal/logz"
"github.com/sour-is/ev/internal/lg"
"github.com/sour-is/ev/pkg/locker"
)
@ -67,7 +67,7 @@ func (u *UnknownEvent) MarshalBinary() ([]byte, error) {
// Register a type container for Unmarshalling values into. The type must implement Event and not be a nil value.
func Register(ctx context.Context, lis ...Event) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
for _, e := range lis {
@ -84,7 +84,7 @@ func Register(ctx context.Context, lis ...Event) error {
return nil
}
func RegisterName(ctx context.Context, name string, e Event) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
if e == nil {
@ -107,7 +107,7 @@ func RegisterName(ctx context.Context, name string, e Event) error {
span.AddEvent("register: " + name)
if err := eventTypes.Modify(ctx, func(c *config) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
c.eventTypes[name] = typ
@ -119,13 +119,13 @@ func RegisterName(ctx context.Context, name string, e Event) error {
return nil
}
func GetContainer(ctx context.Context, s string) Event {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
var e Event
eventTypes.Modify(ctx, func(c *config) error {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
typ, ok := c.eventTypes[s]
@ -176,7 +176,7 @@ func MarshalBinary(e Event) (txt []byte, err error) {
}
func UnmarshalBinary(ctx context.Context, txt []byte, pos uint64) (e Event, err error) {
_, span := logz.Span(ctx)
_, span := lg.Span(ctx)
defer span.End()
sp := bytes.SplitN(txt, []byte{'\t'}, 4)
@ -262,7 +262,13 @@ func Values(e Event) map[string]any {
}
field := v.FieldByIndex(idx.Index)
m[idx.Name] = field.Interface()
name := idx.Name
if n, ok := idx.Tag.Lookup("json"); ok {
name = n
}
m[name] = field.Interface()
}
return m
}

16
pkg/es/graph.go
View File

@ -6,7 +6,7 @@ import (
"net/http"
"time"
"github.com/sour-is/ev/internal/logz"
"github.com/sour-is/ev/internal/lg"
"github.com/sour-is/ev/pkg/es/event"
"github.com/sour-is/ev/pkg/gql"
)
@ -17,7 +17,7 @@ type EventResolver interface {
}
func (es *EventStore) Events(ctx context.Context, streamID string, paging *gql.PageInput) (*gql.Connection, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
lis, err := es.Read(ctx, streamID, paging.GetIdx(0), paging.GetCount(30))
@ -53,7 +53,7 @@ func (es *EventStore) Events(ctx context.Context, streamID string, paging *gql.P
}, nil
}
func (e *EventStore) EventAdded(ctx context.Context, streamID string, after int64) (<-chan *GQLEvent, error) {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
es := e.EventStream()
@ -70,15 +70,19 @@ func (e *EventStore) EventAdded(ctx context.Context, streamID string, after int6
ch := make(chan *GQLEvent)
go func() {
ctx, span := logz.Span(ctx)
ctx, span := lg.Span(ctx)
defer span.End()
{
ctx, span := lg.Fork(ctx)
defer func() {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
defer span.End()
ctx, cancel := context.WithTimeout(ctx, 1*time.Second)
defer cancel()
err := sub.Close(ctx)
span.RecordError(err)
}()
}
for sub.Recv(ctx) {
events, err := sub.Events(ctx)
@ -109,7 +113,7 @@ type GQLEvent struct {
}
func (e *GQLEvent) ID() string {
return "Event/" + e.e.EventMeta().GetEventID()
return fmt.Sprint(e.e.EventMeta().StreamID, "@", e.e.EventMeta().Position)
}
func (e *GQLEvent) EventID() string {
return e.e.EventMeta().GetEventID()

5
pkg/locker/locker.go
View File

@ -2,6 +2,8 @@ package locker
import (
"context"
"github.com/sour-is/ev/internal/lg"
)
type Locked[T any] struct {
@ -18,6 +20,9 @@ func New[T any](initial *T) *Locked[T] {
// Modify will call the function with the locked value
func (s *Locked[T]) Modify(ctx context.Context, fn func(*T) error) error {
_, span := lg.Span(ctx)
defer span.End()
if ctx.Err() != nil {
return ctx.Err()
}

35
pkg/set/set.go Normal file
View File

@ -0,0 +1,35 @@
package set
import (
"fmt"
"strings"
)
type Set[T comparable] map[T]struct{}
func New[T comparable](items ...T) Set[T] {
s := make(map[T]struct{}, len(items))
for i := range items {
s[items[i]] = struct{}{}
}
return s
}
func (s Set[T]) Has(v T) bool {
_, ok := (s)[v]
return ok
}
func (s Set[T]) String() string {
if s == nil {
return "set(<nil>)"
}
lis := make([]string, 0, len(s))
for k := range s {
lis = append(lis, fmt.Sprint(k))
}
var b strings.Builder
b.WriteString("set(")
b.WriteString(strings.Join(lis, ","))
b.WriteString(")")
return b.String()
}