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Merge pull request #1 from sour-is/inprogress

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Adding initial projection support and peerfinder app
This commit is contained in:
Jon Lundy 2022-09-06 10:40:02 -06:00 committed by GitHub
commit c5fdb1319c
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GPG Key ID: 4AEE18F83AFDEB23
32 changed files with 2220 additions and 211 deletions
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4
.air.toml
View File

@ -15,9 +15,9 @@ tmp_dir = "tmp"
full_bin = ""
include_dir = []
include_ext = ["go", "tpl", "tmpl", "html"]
kill_delay = "0s"
kill_delay = "1s"
log = "build-errors.log"
send_interrupt = false
send_interrupt = true
stop_on_error = true
[color]

1
Makefile
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@ -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.

0
app/playground/playground.go → app/gql/playground/playground.go
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132
app/gql/resolver.go Normal file
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@ -0,0 +1,132 @@
package gql
import (
"context"
"fmt"
"net/http"
"os"
"reflect"
"runtime/debug"
"github.com/99designs/gqlgen/graphql/handler"
"github.com/ravilushqa/otelgqlgen"
"github.com/sour-is/ev/app/gql/playground"
"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/lg"
"github.com/sour-is/ev/pkg/es"
"github.com/sour-is/ev/pkg/gql"
"github.com/vektah/gqlparser/v2/gqlerror"
)
type Resolver struct {
msgbus.MsgbusResolver
salty.SaltyResolver
es.EventResolver
}
func New(ctx context.Context, resolvers ...interface{ RegisterHTTP(*http.ServeMux) }) (*Resolver, error) {
_, span := lg.Span(ctx)
defer span.End()
r := &Resolver{}
v := reflect.ValueOf(r)
v = reflect.Indirect(v)
noop := reflect.ValueOf(&noop{})
outer:
for _, idx := range reflect.VisibleFields(v.Type()) {
field := v.FieldByIndex(idx.Index)
for i := range resolvers {
rs := reflect.ValueOf(resolvers[i])
if field.IsNil() && rs.Type().Implements(field.Type()) {
span.AddEvent(fmt.Sprint("found ", field.Type().Name()))
field.Set(rs)
continue outer
}
}
span.AddEvent(fmt.Sprint("default ", field.Type().Name()))
field.Set(noop)
}
return r, nil
}
// Query returns generated.QueryResolver implementation.
func (r *Resolver) Query() generated.QueryResolver { return r }
// Query returns generated.QueryResolver implementation.
func (r *Resolver) Mutation() generated.MutationResolver { return r }
// Subscription returns generated.SubscriptionResolver implementation.
func (r *Resolver) Subscription() generated.SubscriptionResolver { return r }
// ChainMiddlewares will check all embeded resolvers for a GetMiddleware func and add to handler.
func (r *Resolver) ChainMiddlewares(h http.Handler) http.Handler {
v := reflect.ValueOf(r) // Get reflected value of *Resolver
v = reflect.Indirect(v) // Get the pointed value (returns a zero value on nil)
n := v.NumField() // Get number of fields to iterate over.
for i := 0; i < n; i++ {
f := v.Field(i)
if !f.CanInterface() { // Skip non-interface types.
continue
}
if iface, ok := f.Interface().(interface {
GetMiddleware() func(http.Handler) http.Handler
}); ok {
h = iface.GetMiddleware()(h) // Append only items that fulfill the interface.
}
}
return h
}
func (r *Resolver) RegisterHTTP(mux *http.ServeMux) {
gql := handler.NewDefaultServer(generated.NewExecutableSchema(generated.Config{Resolvers: r}))
gql.SetRecoverFunc(NoopRecover)
gql.Use(otelgqlgen.Middleware())
mux.Handle("/", playground.Handler("GraphQL playground", "/gql"))
mux.Handle("/gql", lg.Htrace(r.ChainMiddlewares(gql), "gql"))
}
type noop struct{}
func NoopRecover(ctx context.Context, err interface{}) error {
if err, ok := err.(string); ok && err == "not implemented" {
return gqlerror.Errorf("not implemented")
}
fmt.Fprintln(os.Stderr, err)
fmt.Fprintln(os.Stderr)
debug.PrintStack()
return gqlerror.Errorf("internal system error")
}
var _ msgbus.MsgbusResolver = (*noop)(nil)
var _ salty.SaltyResolver = (*noop)(nil)
var _ es.EventResolver = (*noop)(nil)
func (*noop) CreateSaltyUser(ctx context.Context, nick string, pubkey string) (*salty.SaltyUser, error) {
panic("not implemented")
}
func (*noop) Posts(ctx context.Context, streamID string, paging *gql.PageInput) (*gql.Connection, error) {
panic("not implemented")
}
func (*noop) SaltyUser(ctx context.Context, nick string) (*salty.SaltyUser, error) {
panic("not implemented")
}
func (*noop) PostAdded(ctx context.Context, streamID string, after int64) (<-chan *msgbus.PostEvent, error) {
panic("not implemented")
}
func (*noop) Events(ctx context.Context, streamID string, paging *gql.PageInput) (*gql.Connection, error) {
panic("not implemented")
}
func (*noop) EventAdded(ctx context.Context, streamID string, after int64) (<-chan *es.GQLEvent, error) {
panic("not implemented")
}
func (*noop) RegisterHTTP(*http.ServeMux) {}

66
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"
@ -31,10 +31,11 @@ type service struct {
type MsgbusResolver interface {
Posts(ctx context.Context, streamID string, paging *gql.PageInput) (*gql.Connection, error)
PostAdded(ctx context.Context, streamID string, after int64) (<-chan *PostEvent, error)
RegisterHTTP(mux *http.ServeMux)
}
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 {
@ -44,7 +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}
@ -71,11 +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)
@ -96,7 +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)
@ -142,7 +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)
@ -161,15 +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()
defer func() {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
defer cancel()
err := sub.Close(ctx)
span.RecordError(err)
}()
{
ctx, span := lg.Fork(ctx)
defer func() {
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)
@ -198,7 +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, "/")
@ -252,7 +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, "/")
@ -319,7 +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, "/")
@ -380,12 +385,16 @@ func (s *service) websocket(w http.ResponseWriter, r *http.Request) {
span.RecordError(err)
return
}
defer func() {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
defer cancel()
span.AddEvent("stop ws")
sub.Close(ctx)
}()
{
ctx, span := lg.Fork(ctx)
defer func() {
defer span.End()
ctx, cancel := context.WithTimeout(ctx, 1*time.Second)
defer cancel()
err := sub.Close(ctx)
span.RecordError(err)
}()
}
span.AddEvent("start ws")
for sub.Recv(ctx) {
@ -434,14 +443,21 @@ func (e *PostEvent) SetEventMeta(eventMeta event.Meta) {
}
e.eventMeta = eventMeta
}
func (e *PostEvent) MarshalBinary() ([]byte, error) {
j := struct {
func (e *PostEvent) Values() any {
if e == nil {
return nil
}
return struct {
Payload []byte
Tags []string
}{
Payload: e.payload,
Tags: e.tags,
}
}
func (e *PostEvent) MarshalBinary() ([]byte, error) {
j := e.Values()
return json.Marshal(&j)
}
func (e *PostEvent) UnmarshalBinary(b []byte) error {

183
app/peerfinder/peer.go Normal file
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@ -0,0 +1,183 @@
package peerfinder
import (
"bytes"
"encoding/json"
"net/netip"
"strconv"
"time"
"github.com/sour-is/ev/pkg/es/event"
)
type Request struct {
eventMeta event.Meta
RequestIP string `json:"req_ip"`
Hidden bool `json:"hide,omitempty"`
}
func (r *Request) StreamID() string {
return r.EventMeta().GetEventID()
}
func (r *Request) RequestID() string {
return r.EventMeta().GetEventID()
}
func (r *Request) Created() time.Time {
return r.EventMeta().Created()
}
func (r *Request) CreatedString() string {
return r.Created().Format("2006-01-02 15:04:05")
}
func (r *Request) Family() int {
if r == nil {
return 0
}
ip, err := netip.ParseAddr(r.RequestIP)
switch {
case err != nil:
return 0
case ip.Is4():
return 1
default:
return 2
}
}
var _ event.Event = (*Request)(nil)
func (e *Request) EventMeta() event.Meta {
if e == nil {
return event.Meta{}
}
return e.eventMeta
}
func (e *Request) SetEventMeta(m event.Meta) {
if e != nil {
e.eventMeta = m
}
}
func (e *Request) MarshalBinary() (text []byte, err error) {
return json.Marshal(e)
}
func (e *Request) UnmarshalBinary(b []byte) error {
return json.Unmarshal(b, e)
}
func (e *Request) MarshalEnviron() ([]byte, error) {
if e == nil {
return nil, nil
}
var b bytes.Buffer
b.WriteString("REQ_ID=")
b.WriteString(e.RequestID())
b.WriteRune('\n')
b.WriteString("REQ_IP=")
b.WriteString(e.RequestIP)
b.WriteRune('\n')
b.WriteString("REQ_FAMILY=")
if family := e.Family(); family > 0 {
b.WriteString(strconv.Itoa(family))
}
b.WriteRune('\n')
b.WriteString("REQ_CREATED=")
b.WriteString(e.CreatedString())
b.WriteRune('\n')
return b.Bytes(), nil
}
type Result struct {
eventMeta event.Meta
RequestID string `json:"req_id"`
PeerID string `json:"peer_id"`
PeerVersion string `json:"peer_version"`
Latency float64 `json:"latency,omitempty"`
}
func (r *Result) Created() time.Time {
return r.eventMeta.Created()
}
var _ event.Event = (*Result)(nil)
func (e *Result) EventMeta() event.Meta {
if e == nil {
return event.Meta{}
}
return e.eventMeta
}
func (e *Result) SetEventMeta(m event.Meta) {
if e != nil {
e.eventMeta = m
}
}
func (e *Result) MarshalBinary() (text []byte, err error) {
return json.Marshal(e)
}
func (e *Result) UnmarshalBinary(b []byte) error {
return json.Unmarshal(b, e)
}
type Info struct {
ScriptVersion string `json:"script_version"`
event.AggregateRoot
}
var _ event.Aggregate = (*Info)(nil)
func (a *Info) ApplyEvent(lis ...event.Event) {
for _, e := range lis {
switch e := e.(type) {
case *VersionChanged:
a.ScriptVersion = e.ScriptVersion
}
}
}
func (a *Info) MarshalEnviron() ([]byte, error) {
var b bytes.Buffer
b.WriteString("SCRIPT_VERSION=")
b.WriteString(a.ScriptVersion)
b.WriteRune('\n')
return b.Bytes(), nil
}
func (a *Info) OnCreate() error {
if a.StreamVersion() == 0 {
event.Raise(a, &VersionChanged{ScriptVersion: initVersion})
}
return nil
}
type VersionChanged struct {
ScriptVersion string `json:"script_version"`
eventMeta event.Meta
}
var _ event.Event = (*VersionChanged)(nil)
func (e *VersionChanged) EventMeta() event.Meta {
if e == nil {
return event.Meta{}
}
return e.eventMeta
}
func (e *VersionChanged) SetEventMeta(m event.Meta) {
if e != nil {
e.eventMeta = m
}
}
func (e *VersionChanged) MarshalBinary() (text []byte, err error) {
return json.Marshal(e)
}
func (e *VersionChanged) UnmarshalBinary(b []byte) error {
return json.Unmarshal(b, e)
}

268
app/peerfinder/service.go Normal file
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@ -0,0 +1,268 @@
package peerfinder
import (
"context"
"encoding/json"
"io"
"net/http"
"strconv"
"strings"
ulid "github.com/oklog/ulid/v2"
contentnegotiation "gitlab.com/jamietanna/content-negotiation-go"
"github.com/sour-is/ev/internal/lg"
"github.com/sour-is/ev/pkg/es"
"github.com/sour-is/ev/pkg/es/event"
)
const (
queueRequests = "pf-requests"
queueResponses = "pf-response-"
aggInfo = "pf-info"
initVersion = "1.1.0"
)
type service struct {
es *es.EventStore
}
func New(ctx context.Context, es *es.EventStore) (*service, error) {
ctx, span := lg.Span(ctx)
defer span.End()
if err := event.Register(ctx, &Request{}, &Result{}, &VersionChanged{}); err != nil {
span.RecordError(err)
return nil, err
}
svc := &service{es: es}
return svc, nil
}
func (s *service) RegisterHTTP(mux *http.ServeMux) {
mux.Handle("/peers/", lg.Htrace(s, "peers"))
}
func (s *service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
_, span := lg.Span(ctx)
defer span.End()
r = r.WithContext(ctx)
switch r.Method {
case http.MethodGet:
switch {
case strings.HasPrefix(r.URL.Path, "/peers/pending/"):
s.getPending(w, r, strings.TrimPrefix(r.URL.Path, "/peers/pending/"))
return
case strings.HasPrefix(r.URL.Path, "/peers/req/"):
s.getResults(w, r, strings.TrimPrefix(r.URL.Path, "/peers/req/"))
return
default:
w.WriteHeader(http.StatusNotFound)
return
}
case http.MethodPost:
switch {
case strings.HasPrefix(r.URL.Path, "/peers/req/"):
s.postResult(w, r, strings.TrimPrefix(r.URL.Path, "/peers/req/"))
return
case strings.HasPrefix(r.URL.Path, "/peers/req"):
s.postRequest(w, r)
return
default:
w.WriteHeader(http.StatusNotFound)
return
}
default:
w.WriteHeader(http.StatusMethodNotAllowed)
return
}
}
func (s *service) getPending(w http.ResponseWriter, r *http.Request, uuid string) {
ctx := r.Context()
_, span := lg.Span(ctx)
defer span.End()
info, err := es.Upsert(ctx, s.es, "pf-info", func(ctx context.Context, agg *Info) error {
return agg.OnCreate() // initialize if not exists
})
if err != nil {
span.RecordError(err)
w.WriteHeader(http.StatusInternalServerError)
return
}
requests, err := s.es.Read(ctx, queueRequests, -1, -30)
if err != nil {
span.RecordError(err)
w.WriteHeader(http.StatusInternalServerError)
return
}
responses, err := s.es.Read(ctx, queueResponses+uuid, -1, -30)
if err != nil {
span.RecordError(err)
w.WriteHeader(http.StatusInternalServerError)
return
}
req := filter(requests, responses)
negotiator := contentnegotiation.NewNegotiator("application/json", "text/environment", "text/plain", "text/html")
negotiated, _, err := negotiator.Negotiate(r.Header.Get("Accept"))
if err != nil {
span.RecordError(err)
w.WriteHeader(http.StatusNotAcceptable)
return
}
span.AddEvent(negotiated.String())
switch negotiated.String() {
case "text/environment":
_, err = encodeTo(w, info.MarshalEnviron, req.MarshalEnviron)
case "application/json":
var out interface{} = info
if req != nil {
out = struct {
ScriptVersion string `json:"script_version"`
RequestID string `json:"req_id"`
RequestIP string `json:"req_ip"`
Family string `json:"req_family"`
Created string `json:"req_created"`
}{
info.ScriptVersion,
req.RequestID(),
req.RequestIP,
strconv.Itoa(req.Family()),
req.CreatedString(),
}
}
err = json.NewEncoder(w).Encode(out)
}
span.RecordError(err)
}
func (s *service) getResults(w http.ResponseWriter, r *http.Request, uuid string) {
ctx := r.Context()
responses, err := s.es.Read(ctx, queueResponses+uuid, -1, es.AllEvents)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
negotiator := contentnegotiation.NewNegotiator("application/json", "text/environment", "text/csv", "text/plain", "text/html")
negotiated, _, err := negotiator.Negotiate("application/json")
if err != nil {
w.WriteHeader(http.StatusNotAcceptable)
return
}
switch negotiated.String() {
// case "text/environment":
// encodeTo(w, responses.MarshalBinary)
case "application/json":
json.NewEncoder(w).Encode(responses)
}
}
func (s *service) postRequest(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
if err := r.ParseForm(); err != nil {
w.WriteHeader(http.StatusUnprocessableEntity)
return
}
req := &Request{
RequestIP: r.Form.Get("req_ip"),
}
if hidden, err := strconv.ParseBool(r.Form.Get("req_hidden")); err != nil {
req.Hidden = hidden
}
s.es.Append(ctx, queueRequests, event.NewEvents(req))
}
func (s *service) postResult(w http.ResponseWriter, r *http.Request, id string) {
ctx := r.Context()
if _, err := ulid.ParseStrict(id); err != nil {
w.WriteHeader(http.StatusNotFound)
return
}
if err := r.ParseForm(); err != nil {
w.WriteHeader(http.StatusUnprocessableEntity)
return
}
latency, err := strconv.ParseFloat(r.Form.Get("res_latency"), 64)
if err != nil {
w.WriteHeader(http.StatusUnprocessableEntity)
return
}
req := &Result{
RequestID: id,
PeerID: r.Form.Get("peer_id"),
PeerVersion: r.Form.Get("peer_version"),
Latency: latency,
}
s.es.Append(ctx, queueResponses+id, event.NewEvents(req))
}
func filter(requests, responses event.Events) *Request {
have := make(map[string]struct{}, len(responses))
for _, res := range toList[Result](responses...) {
have[res.RequestID] = struct{}{}
}
for _, req := range reverse(toList[Request](requests...)...) {
if _, ok := have[req.RequestID()]; !ok {
return req
}
}
return nil
}
func toList[E any, T es.PE[E]](lis ...event.Event) []T {
newLis := make([]T, 0, len(lis))
for i := range lis {
if e, ok := lis[i].(T); ok {
newLis = append(newLis, e)
}
}
return newLis
}
func reverse[T any](s ...T) []T {
first, last := 0, len(s)-1
for first < last {
s[first], s[last] = s[last], s[first]
first++
last--
}
return s
}
func encodeTo(w io.Writer, fns ...func() ([]byte, error)) (int, error) {
i := 0
for _, fn := range fns {
b, err := fn()
if err != nil {
return i, err
}
j, err := w.Write(b)
i += j
if err != nil {
return i, err
}
}
return i, nil
}

142
app/salty/salty-addr.go Normal file
View File

@ -0,0 +1,142 @@
package salty
import (
"context"
"crypto/sha256"
"encoding/json"
"fmt"
"net/http"
"net/url"
"strings"
"github.com/keys-pub/keys"
"github.com/sour-is/ev/internal/lg"
)
// Config represents a Salty Config for a User which at a minimum is required
// to have an Endpoint and Key (Public Key)
type Config struct {
Endpoint string `json:"endpoint"`
Key string `json:"key"`
}
type Capabilities struct {
AcceptEncoding string
}
func (c Capabilities) String() string {
return fmt.Sprint("accept-encoding: ", c.AcceptEncoding)
}
type Addr struct {
User string
Domain string
capabilities Capabilities
discoveredDomain string
dns DNSResolver
endpoint *url.URL
key *keys.EdX25519PublicKey
}
// ParseAddr parsers a Salty Address for a user into it's user and domain
// parts and returns an Addr object with the User and Domain and a method
// for returning the expected User's Well-Known URI
func (s *service) ParseAddr(addr string) (*Addr, error) {
parts := strings.Split(strings.ToLower(addr), "@")
if len(parts) != 2 {
return nil, fmt.Errorf("expected nick@domain found %q", addr)
}
return &Addr{User: parts[0], Domain: parts[1], dns: s.dns}, nil
}
func (a *Addr) String() string {
return fmt.Sprintf("%s@%s", a.User, a.Domain)
}
// Hash returns the Hex(SHA256Sum()) of the Address
func (a *Addr) Hash() string {
return fmt.Sprintf("%x", sha256.Sum256([]byte(strings.ToLower(a.String()))))
}
// URI returns the Well-Known URI for this Addr
func (a *Addr) URI() string {
return fmt.Sprintf("https://%s/.well-known/salty/%s.json", a.DiscoveredDomain(), a.User)
}
// HashURI returns the Well-Known HashURI for this Addr
func (a *Addr) HashURI() string {
return fmt.Sprintf("https://%s/.well-known/salty/%s.json", a.DiscoveredDomain(), a.Hash())
}
// DiscoveredDomain returns the discovered domain (if any) of fallbacks to the Domain
func (a *Addr) DiscoveredDomain() string {
if a.discoveredDomain != "" {
return a.discoveredDomain
}
return a.Domain
}
func (a *Addr) Refresh(ctx context.Context) error {
ctx, span := lg.Span(ctx)
defer span.End()
span.AddEvent(fmt.Sprintf("Looking up SRV record for _salty._tcp.%s", a.Domain))
if target, _, err := a.dns.LookupSRV(ctx, "salty", "tcp", a.Domain); err == nil {
a.discoveredDomain = target
span.AddEvent(fmt.Sprintf("Discovered salty services %s", a.discoveredDomain))
} else if err != nil {
span.AddEvent(fmt.Sprintf("error looking up SRV record for _salty._tcp.%s : %s", a.Domain, err))
}
config, cap, err := fetchConfig(ctx, a.HashURI())
if err != nil {
// Fallback to plain user nick
config, cap, err = fetchConfig(ctx, a.URI())
}
if err != nil {
return fmt.Errorf("error looking up user %s: %w", a, err)
}
key, err := keys.NewEdX25519PublicKeyFromID(keys.ID(config.Key))
if err != nil {
return fmt.Errorf("error parsing public key %s: %w", config.Key, err)
}
a.key = key
u, err := url.Parse(config.Endpoint)
if err != nil {
return fmt.Errorf("error parsing endpoint %s: %w", config.Endpoint, err)
}
a.endpoint = u
a.capabilities = cap
span.AddEvent(fmt.Sprintf("Discovered endpoint: %v", a.endpoint))
span.AddEvent(fmt.Sprintf("Discovered capability: %v", a.capabilities))
return nil
}
func fetchConfig(ctx context.Context, addr string) (config Config, cap Capabilities, err error) {
ctx, span := lg.Span(ctx)
defer span.End()
var req *http.Request
req, err = http.NewRequestWithContext(ctx, http.MethodGet, addr, nil)
if err != nil {
return
}
res, err := http.DefaultClient.Do(req)
if err != nil {
return
}
if err = json.NewDecoder(res.Body).Decode(&config); err != nil {
return
}
cap.AcceptEncoding = res.Header.Get("Accept-Encoding")
return
}

110
app/salty/service.go
View File

@ -6,12 +6,13 @@ import (
"encoding/json"
"errors"
"fmt"
"net"
"net/http"
"path"
"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"
@ -19,12 +20,21 @@ import (
"go.uber.org/multierr"
)
type DNSResolver interface {
LookupSRV(ctx context.Context, service, proto, name string) (string, []*net.SRV, error)
}
type service struct {
baseURL string
es *es.EventStore
dns DNSResolver
Mresolver_create_salty_user syncint64.Counter
Mresolver_salty_user syncint64.Counter
m_create_user syncint64.Counter
m_get_user syncint64.Counter
m_api_ping syncint64.Counter
m_api_register syncint64.Counter
m_api_lookup syncint64.Counter
m_api_send syncint64.Counter
}
type contextKey struct {
name string
@ -35,10 +45,11 @@ var saltyKey = contextKey{"salty"}
type SaltyResolver interface {
CreateSaltyUser(ctx context.Context, nick string, pub string) (*SaltyUser, error)
SaltyUser(ctx context.Context, nick string) (*SaltyUser, error)
RegisterHTTP(mux *http.ServeMux)
}
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 {
@ -48,15 +59,27 @@ 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}
svc := &service{baseURL: baseURL, es: es, dns: net.DefaultResolver}
var err, errs error
svc.Mresolver_create_salty_user, err = m.SyncInt64().Counter("resolver_create_salty_user")
svc.m_create_user, err = m.SyncInt64().Counter("salty_create_user")
errs = multierr.Append(errs, err)
svc.Mresolver_salty_user, err = m.SyncInt64().Counter("resolver_salty_user")
svc.m_get_user, err = m.SyncInt64().Counter("salty_get_user")
errs = multierr.Append(errs, err)
svc.m_api_ping, err = m.SyncInt64().Counter("salty_api_ping")
errs = multierr.Append(errs, err)
svc.m_api_register, err = m.SyncInt64().Counter("salty_api_register")
errs = multierr.Append(errs, err)
svc.m_api_lookup, err = m.SyncInt64().Counter("salty_api_lookup")
errs = multierr.Append(errs, err)
svc.m_api_send, err = m.SyncInt64().Counter("salty_api_send")
errs = multierr.Append(errs, err)
span.RecordError(err)
@ -69,12 +92,18 @@ func (s *service) BaseURL() string {
}
return s.baseURL
}
func(s *service) RegisterHTTP(mux *http.ServeMux) {
mux.Handle("/.well-known/salty/", logz.Htrace(s, "lookup"))
func (s *service) RegisterHTTP(mux *http.ServeMux) {
mux.Handle("/.well-known/salty/", lg.Htrace(s, "lookup"))
}
func (s *service) RegisterAPIv1(mux *http.ServeMux) {
mux.HandleFunc("/ping", s.apiv1)
mux.HandleFunc("/register", s.apiv1)
mux.HandleFunc("/lookup/", s.apiv1)
mux.HandleFunc("/send", s.apiv1)
}
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/")
@ -108,10 +137,10 @@ 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.Mresolver_create_salty_user.Add(ctx, 1)
s.m_create_user.Add(ctx, 1)
streamID := fmt.Sprintf("saltyuser-%x", sha256.Sum256([]byte(strings.ToLower(nick))))
span.AddEvent(streamID)
@ -138,10 +167,10 @@ 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.Mresolver_salty_user.Add(ctx, 1)
s.m_get_user.Add(ctx, 1)
streamID := fmt.Sprintf("saltyuser-%x", sha256.Sum256([]byte(strings.ToLower(nick))))
span.AddEvent(streamID)
@ -167,3 +196,54 @@ func (s *service) GetMiddleware() func(http.Handler) http.Handler {
})
}
}
func (s *service) apiv1(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
ctx, span := lg.Span(ctx)
defer span.End()
switch r.Method {
case http.MethodGet:
switch {
case r.URL.Path == "/ping":
w.Header().Set("Content-Type", "application/json")
_, _ = w.Write([]byte(`{}`))
case strings.HasPrefix(r.URL.Path, "/lookup/"):
addr, err := s.ParseAddr(strings.TrimPrefix(r.URL.Path, "/lookup/"))
if err != nil {
span.RecordError(err)
w.WriteHeader(http.StatusBadRequest)
return
}
err = addr.Refresh(ctx)
if err != nil {
span.RecordError(err)
w.WriteHeader(http.StatusBadRequest)
return
}
json.NewEncoder(w).Encode(addr)
return
default:
w.WriteHeader(http.StatusNotFound)
return
}
case http.MethodPost:
switch r.URL.Path {
case "/register":
case "/send":
default:
w.WriteHeader(http.StatusNotFound)
return
}
default:
w.WriteHeader(http.StatusMethodNotAllowed)
return
}
}

1
go.mod
View File

@ -80,6 +80,7 @@ require (
github.com/tidwall/match v1.1.1 // indirect
github.com/tidwall/pretty v1.2.0 // indirect
github.com/tidwall/tinylru v1.1.0 // indirect
gitlab.com/jamietanna/content-negotiation-go v0.2.0
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.9.0
go.uber.org/multierr v1.8.0
)

2
go.sum
View File

@ -351,6 +351,8 @@ github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
github.com/yusufpapurcu/wmi v1.2.2 h1:KBNDSne4vP5mbSWnJbO+51IMOXJB67QiYCSBrubbPRg=
github.com/yusufpapurcu/wmi v1.2.2/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
gitlab.com/jamietanna/content-negotiation-go v0.2.0 h1:vT0OLEPQ6DYRG3/1F7joXSNjVQHGivJ6+JzODlJfjWw=
gitlab.com/jamietanna/content-negotiation-go v0.2.0/go.mod h1:n4ZZ8/X5TstnjYRnjEtR/fC7MCTe+aRKM7PQlLBH3PQ=
go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=

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)
}

601
internal/graph/generated/generated.go
View File

@ -18,6 +18,7 @@ import (
"github.com/99designs/gqlgen/plugin/federation/fedruntime"
"github.com/sour-is/ev/app/msgbus"
"github.com/sour-is/ev/app/salty"
"github.com/sour-is/ev/pkg/es"
"github.com/sour-is/ev/pkg/es/event"
"github.com/sour-is/ev/pkg/gql"
gqlparser "github.com/vektah/gqlparser/v2"
@ -56,6 +57,14 @@ type ComplexityRoot struct {
Paging func(childComplexity int) int
}
Event struct {
Bytes func(childComplexity int) int
EventID func(childComplexity int) int
ID func(childComplexity int) int
Meta func(childComplexity int) int
Values func(childComplexity int) int
}
Meta struct {
Created func(childComplexity int) int
GetEventID func(childComplexity int) int
@ -83,6 +92,7 @@ type ComplexityRoot struct {
}
Query struct {
Events func(childComplexity int, streamID string, paging *gql.PageInput) int
Posts func(childComplexity int, streamID string, paging *gql.PageInput) int
SaltyUser func(childComplexity int, nick string) int
__resolve__service func(childComplexity int) int
@ -96,7 +106,8 @@ type ComplexityRoot struct {
}
Subscription struct {
PostAdded func(childComplexity int, streamID string, after int64) int
EventAdded func(childComplexity int, streamID string, after int64) int
PostAdded func(childComplexity int, streamID string, after int64) int
}
_Service struct {
@ -108,10 +119,12 @@ type MutationResolver interface {
CreateSaltyUser(ctx context.Context, nick string, pubkey string) (*salty.SaltyUser, error)
}
type QueryResolver interface {
Events(ctx context.Context, streamID string, paging *gql.PageInput) (*gql.Connection, error)
Posts(ctx context.Context, streamID string, paging *gql.PageInput) (*gql.Connection, error)
SaltyUser(ctx context.Context, nick string) (*salty.SaltyUser, error)
}
type SubscriptionResolver interface {
EventAdded(ctx context.Context, streamID string, after int64) (<-chan *es.GQLEvent, error)
PostAdded(ctx context.Context, streamID string, after int64) (<-chan *msgbus.PostEvent, error)
}
@ -144,6 +157,41 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
return e.complexity.Connection.Paging(childComplexity), true
case "Event.bytes":
if e.complexity.Event.Bytes == nil {
break
}
return e.complexity.Event.Bytes(childComplexity), true
case "Event.eventID":
if e.complexity.Event.EventID == nil {
break
}
return e.complexity.Event.EventID(childComplexity), true
case "Event.id":
if e.complexity.Event.ID == nil {
break
}
return e.complexity.Event.ID(childComplexity), true
case "Event.meta":
if e.complexity.Event.Meta == nil {
break
}
return e.complexity.Event.Meta(childComplexity), true
case "Event.values":
if e.complexity.Event.Values == nil {
break
}
return e.complexity.Event.Values(childComplexity), true
case "Meta.created":
if e.complexity.Meta.Created == nil {
break
@ -247,6 +295,18 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
return e.complexity.PostEvent.Tags(childComplexity), true
case "Query.events":
if e.complexity.Query.Events == nil {
break
}
args, err := ec.field_Query_events_args(context.TODO(), rawArgs)
if err != nil {
return 0, false
}
return e.complexity.Query.Events(childComplexity, args["streamID"].(string), args["paging"].(*gql.PageInput)), true
case "Query.posts":
if e.complexity.Query.Posts == nil {
break
@ -306,6 +366,18 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
return e.complexity.SaltyUser.Pubkey(childComplexity), true
case "Subscription.eventAdded":
if e.complexity.Subscription.EventAdded == nil {
break
}
args, err := ec.field_Subscription_eventAdded_args(context.TODO(), rawArgs)
if err != nil {
return 0, false
}
return e.complexity.Subscription.EventAdded(childComplexity, args["streamID"].(string), args["after"].(int64)), true
case "Subscription.postAdded":
if e.complexity.Subscription.PostAdded == nil {
break
@ -417,6 +489,23 @@ type Meta @goModel(model: "github.com/sour-is/ev/pkg/es/event.Meta") {
streamID: String!
created: Time!
position: Int!
}
extend type Query {
events(streamID: String! paging: PageInput): Connection!
}
extend type Subscription {
"""after == 0 start from begining, after == -1 start from end"""
eventAdded(streamID: String! after: Int! = -1): Event
}
type Event implements Edge @goModel(model: "github.com/sour-is/ev/pkg/es.GQLEvent") {
id: ID!
eventID: String!
values: Map!
bytes: String!
meta: Meta!
}`, BuiltIn: false},
{Name: "../../../pkg/gql/common.graphqls", Input: `scalar Time
scalar Map
@ -550,6 +639,30 @@ func (ec *executionContext) field_Query___type_args(ctx context.Context, rawArgs
return args, nil
}
func (ec *executionContext) field_Query_events_args(ctx context.Context, rawArgs map[string]interface{}) (map[string]interface{}, error) {
var err error
args := map[string]interface{}{}
var arg0 string
if tmp, ok := rawArgs["streamID"]; ok {
ctx := graphql.WithPathContext(ctx, graphql.NewPathWithField("streamID"))
arg0, err = ec.unmarshalNString2string(ctx, tmp)
if err != nil {
return nil, err
}
}
args["streamID"] = arg0
var arg1 *gql.PageInput
if tmp, ok := rawArgs["paging"]; ok {
ctx := graphql.WithPathContext(ctx, graphql.NewPathWithField("paging"))
arg1, err = ec.unmarshalOPageInput2ᚖgithubᚗcomᚋsourᚑisᚋevᚋpkgᚋgqlᚐPageInput(ctx, tmp)
if err != nil {
return nil, err
}
}
args["paging"] = arg1
return args, nil
}
func (ec *executionContext) field_Query_posts_args(ctx context.Context, rawArgs map[string]interface{}) (map[string]interface{}, error) {
var err error
args := map[string]interface{}{}
@ -589,6 +702,30 @@ func (ec *executionContext) field_Query_saltyUser_args(ctx context.Context, rawA
return args, nil
}
func (ec *executionContext) field_Subscription_eventAdded_args(ctx context.Context, rawArgs map[string]interface{}) (map[string]interface{}, error) {
var err error
args := map[string]interface{}{}
var arg0 string
if tmp, ok := rawArgs["streamID"]; ok {
ctx := graphql.WithPathContext(ctx, graphql.NewPathWithField("streamID"))
arg0, err = ec.unmarshalNString2string(ctx, tmp)
if err != nil {
return nil, err
}
}
args["streamID"] = arg0
var arg1 int64
if tmp, ok := rawArgs["after"]; ok {
ctx := graphql.WithPathContext(ctx, graphql.NewPathWithField("after"))
arg1, err = ec.unmarshalNInt2int64(ctx, tmp)
if err != nil {
return nil, err
}
}
args["after"] = arg1
return args, nil
}
func (ec *executionContext) field_Subscription_postAdded_args(ctx context.Context, rawArgs map[string]interface{}) (map[string]interface{}, error) {
var err error
args := map[string]interface{}{}
@ -749,6 +886,236 @@ func (ec *executionContext) fieldContext_Connection_edges(ctx context.Context, f
return fc, nil
}
func (ec *executionContext) _Event_id(ctx context.Context, field graphql.CollectedField, obj *es.GQLEvent) (ret graphql.Marshaler) {
fc, err := ec.fieldContext_Event_id(ctx, field)
if err != nil {
return graphql.Null
}
ctx = graphql.WithFieldContext(ctx, fc)
defer func() {
if r := recover(); r != nil {
ec.Error(ctx, ec.Recover(ctx, r))
ret = graphql.Null
}
}()
resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
ctx = rctx // use context from middleware stack in children
return obj.ID(), nil
})
if err != nil {
ec.Error(ctx, err)
return graphql.Null
}
if resTmp == nil {
if !graphql.HasFieldError(ctx, fc) {
ec.Errorf(ctx, "must not be null")
}
return graphql.Null
}
res := resTmp.(string)
fc.Result = res
return ec.marshalNID2string(ctx, field.Selections, res)
}
func (ec *executionContext) fieldContext_Event_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
fc = &graphql.FieldContext{
Object: "Event",
Field: field,
IsMethod: true,
IsResolver: false,
Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
return nil, errors.New("field of type ID does not have child fields")
},
}
return fc, nil
}
func (ec *executionContext) _Event_eventID(ctx context.Context, field graphql.CollectedField, obj *es.GQLEvent) (ret graphql.Marshaler) {
fc, err := ec.fieldContext_Event_eventID(ctx, field)
if err != nil {
return graphql.Null
}
ctx = graphql.WithFieldContext(ctx, fc)
defer func() {
if r := recover(); r != nil {
ec.Error(ctx, ec.Recover(ctx, r))
ret = graphql.Null
}
}()
resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
ctx = rctx // use context from middleware stack in children
return obj.EventID(), nil
})
if err != nil {
ec.Error(ctx, err)
return graphql.Null
}
if resTmp == nil {
if !graphql.HasFieldError(ctx, fc) {
ec.Errorf(ctx, "must not be null")
}
return graphql.Null
}
res := resTmp.(string)
fc.Result = res
return ec.marshalNString2string(ctx, field.Selections, res)
}
func (ec *executionContext) fieldContext_Event_eventID(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
fc = &graphql.FieldContext{
Object: "Event",
Field: field,
IsMethod: true,
IsResolver: false,
Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
return nil, errors.New("field of type String does not have child fields")
},
}
return fc, nil
}
func (ec *executionContext) _Event_values(ctx context.Context, field graphql.CollectedField, obj *es.GQLEvent) (ret graphql.Marshaler) {
fc, err := ec.fieldContext_Event_values(ctx, field)
if err != nil {
return graphql.Null
}
ctx = graphql.WithFieldContext(ctx, fc)
defer func() {
if r := recover(); r != nil {
ec.Error(ctx, ec.Recover(ctx, r))
ret = graphql.Null
}
}()
resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
ctx = rctx // use context from middleware stack in children
return obj.Values(), nil
})
if err != nil {
ec.Error(ctx, err)
return graphql.Null
}
if resTmp == nil {
if !graphql.HasFieldError(ctx, fc) {
ec.Errorf(ctx, "must not be null")
}
return graphql.Null
}
res := resTmp.(map[string]interface{})
fc.Result = res
return ec.marshalNMap2map(ctx, field.Selections, res)
}
func (ec *executionContext) fieldContext_Event_values(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
fc = &graphql.FieldContext{
Object: "Event",
Field: field,
IsMethod: true,
IsResolver: false,
Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
return nil, errors.New("field of type Map does not have child fields")
},
}
return fc, nil
}
func (ec *executionContext) _Event_bytes(ctx context.Context, field graphql.CollectedField, obj *es.GQLEvent) (ret graphql.Marshaler) {
fc, err := ec.fieldContext_Event_bytes(ctx, field)
if err != nil {
return graphql.Null
}
ctx = graphql.WithFieldContext(ctx, fc)
defer func() {
if r := recover(); r != nil {
ec.Error(ctx, ec.Recover(ctx, r))
ret = graphql.Null
}
}()
resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
ctx = rctx // use context from middleware stack in children
return obj.Bytes()
})
if err != nil {
ec.Error(ctx, err)
return graphql.Null
}
if resTmp == nil {
if !graphql.HasFieldError(ctx, fc) {
ec.Errorf(ctx, "must not be null")
}
return graphql.Null
}
res := resTmp.(string)
fc.Result = res
return ec.marshalNString2string(ctx, field.Selections, res)
}
func (ec *executionContext) fieldContext_Event_bytes(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
fc = &graphql.FieldContext{
Object: "Event",
Field: field,
IsMethod: true,
IsResolver: false,
Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
return nil, errors.New("field of type String does not have child fields")
},
}
return fc, nil
}
func (ec *executionContext) _Event_meta(ctx context.Context, field graphql.CollectedField, obj *es.GQLEvent) (ret graphql.Marshaler) {
fc, err := ec.fieldContext_Event_meta(ctx, field)
if err != nil {
return graphql.Null
}
ctx = graphql.WithFieldContext(ctx, fc)
defer func() {
if r := recover(); r != nil {
ec.Error(ctx, ec.Recover(ctx, r))
ret = graphql.Null
}
}()
resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
ctx = rctx // use context from middleware stack in children
return obj.Meta(), nil
})
if err != nil {
ec.Error(ctx, err)
return graphql.Null
}
if resTmp == nil {
if !graphql.HasFieldError(ctx, fc) {
ec.Errorf(ctx, "must not be null")
}
return graphql.Null
}
res := resTmp.(*event.Meta)
fc.Result = res
return ec.marshalNMeta2ᚖgithubᚗcomᚋsourᚑisᚋevᚋpkgᚋesᚋeventᚐMeta(ctx, field.Selections, res)
}
func (ec *executionContext) fieldContext_Event_meta(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
fc = &graphql.FieldContext{
Object: "Event",
Field: field,
IsMethod: true,
IsResolver: false,
Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
switch field.Name {
case "eventID":
return ec.fieldContext_Meta_eventID(ctx, field)
case "streamID":
return ec.fieldContext_Meta_streamID(ctx, field)
case "created":
return ec.fieldContext_Meta_created(ctx, field)
case "position":
return ec.fieldContext_Meta_position(ctx, field)
}
return nil, fmt.Errorf("no field named %q was found under type Meta", field.Name)
},
}
return fc, nil
}
func (ec *executionContext) _Meta_eventID(ctx context.Context, field graphql.CollectedField, obj *event.Meta) (ret graphql.Marshaler) {
fc, err := ec.fieldContext_Meta_eventID(ctx, field)
if err != nil {
@ -1393,6 +1760,67 @@ func (ec *executionContext) fieldContext_PostEvent_meta(ctx context.Context, fie
return fc, nil
}
func (ec *executionContext) _Query_events(ctx context.Context, field graphql.CollectedField) (ret graphql.Marshaler) {
fc, err := ec.fieldContext_Query_events(ctx, field)
if err != nil {
return graphql.Null
}
ctx = graphql.WithFieldContext(ctx, fc)
defer func() {
if r := recover(); r != nil {
ec.Error(ctx, ec.Recover(ctx, r))
ret = graphql.Null
}
}()
resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
ctx = rctx // use context from middleware stack in children
return ec.resolvers.Query().Events(rctx, fc.Args["streamID"].(string), fc.Args["paging"].(*gql.PageInput))
})
if err != nil {
ec.Error(ctx, err)
return graphql.Null
}
if resTmp == nil {
if !graphql.HasFieldError(ctx, fc) {
ec.Errorf(ctx, "must not be null")
}
return graphql.Null
}
res := resTmp.(*gql.Connection)
fc.Result = res
return ec.marshalNConnection2ᚖgithubᚗcomᚋsourᚑisᚋevᚋpkgᚋgqlᚐConnection(ctx, field.Selections, res)
}
func (ec *executionContext) fieldContext_Query_events(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
fc = &graphql.FieldContext{
Object: "Query",
Field: field,
IsMethod: true,
IsResolver: true,
Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
switch field.Name {
case "paging":
return ec.fieldContext_Connection_paging(ctx, field)
case "edges":
return ec.fieldContext_Connection_edges(ctx, field)
}
return nil, fmt.Errorf("no field named %q was found under type Connection", field.Name)
},
}
defer func() {
if r := recover(); r != nil {
err = ec.Recover(ctx, r)
ec.Error(ctx, err)
}
}()
ctx = graphql.WithFieldContext(ctx, fc)
if fc.Args, err = ec.field_Query_events_args(ctx, field.ArgumentMap(ec.Variables)); err != nil {
ec.Error(ctx, err)
return
}
return fc, nil
}
func (ec *executionContext) _Query_posts(ctx context.Context, field graphql.CollectedField) (ret graphql.Marshaler) {
fc, err := ec.fieldContext_Query_posts(ctx, field)
if err != nil {
@ -1869,6 +2297,84 @@ func (ec *executionContext) fieldContext_SaltyUser_endpoint(ctx context.Context,
return fc, nil
}
func (ec *executionContext) _Subscription_eventAdded(ctx context.Context, field graphql.CollectedField) (ret func(ctx context.Context) graphql.Marshaler) {
fc, err := ec.fieldContext_Subscription_eventAdded(ctx, field)
if err != nil {
return nil
}
ctx = graphql.WithFieldContext(ctx, fc)
defer func() {
if r := recover(); r != nil {
ec.Error(ctx, ec.Recover(ctx, r))
ret = nil
}
}()
resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
ctx = rctx // use context from middleware stack in children
return ec.resolvers.Subscription().EventAdded(rctx, fc.Args["streamID"].(string), fc.Args["after"].(int64))
})
if err != nil {
ec.Error(ctx, err)
return nil
}
if resTmp == nil {
return nil
}
return func(ctx context.Context) graphql.Marshaler {
select {
case res, ok := <-resTmp.(<-chan *es.GQLEvent):
if !ok {
return nil
}
return graphql.WriterFunc(func(w io.Writer) {
w.Write([]byte{'{'})
graphql.MarshalString(field.Alias).MarshalGQL(w)
w.Write([]byte{':'})
ec.marshalOEvent2ᚖgithubᚗcomᚋsourᚑisᚋevᚋpkgᚋesᚐGQLEvent(ctx, field.Selections, res).MarshalGQL(w)
w.Write([]byte{'}'})
})
case <-ctx.Done():
return nil
}
}
}
func (ec *executionContext) fieldContext_Subscription_eventAdded(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
fc = &graphql.FieldContext{
Object: "Subscription",
Field: field,
IsMethod: true,
IsResolver: true,
Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
switch field.Name {
case "id":
return ec.fieldContext_Event_id(ctx, field)
case "eventID":
return ec.fieldContext_Event_eventID(ctx, field)
case "values":
return ec.fieldContext_Event_values(ctx, field)
case "bytes":
return ec.fieldContext_Event_bytes(ctx, field)
case "meta":
return ec.fieldContext_Event_meta(ctx, field)
}
return nil, fmt.Errorf("no field named %q was found under type Event", field.Name)
},
}
defer func() {
if r := recover(); r != nil {
err = ec.Recover(ctx, r)
ec.Error(ctx, err)
}
}()
ctx = graphql.WithFieldContext(ctx, fc)
if fc.Args, err = ec.field_Subscription_eventAdded_args(ctx, field.ArgumentMap(ec.Variables)); err != nil {
ec.Error(ctx, err)
return
}
return fc, nil
}
func (ec *executionContext) _Subscription_postAdded(ctx context.Context, field graphql.CollectedField) (ret func(ctx context.Context) graphql.Marshaler) {
fc, err := ec.fieldContext_Subscription_postAdded(ctx, field)
if err != nil {
@ -3812,6 +4318,11 @@ func (ec *executionContext) _Edge(ctx context.Context, sel ast.SelectionSet, obj
switch obj := (obj).(type) {
case nil:
return graphql.Null
case *es.GQLEvent:
if obj == nil {
return graphql.Null
}
return ec._Event(ctx, sel, obj)
case *msgbus.PostEvent:
if obj == nil {
return graphql.Null
@ -3861,6 +4372,62 @@ func (ec *executionContext) _Connection(ctx context.Context, sel ast.SelectionSe
return out
}
var eventImplementors = []string{"Event", "Edge"}
func (ec *executionContext) _Event(ctx context.Context, sel ast.SelectionSet, obj *es.GQLEvent) graphql.Marshaler {
fields := graphql.CollectFields(ec.OperationContext, sel, eventImplementors)
out := graphql.NewFieldSet(fields)
var invalids uint32
for i, field := range fields {
switch field.Name {
case "__typename":
out.Values[i] = graphql.MarshalString("Event")
case "id":
out.Values[i] = ec._Event_id(ctx, field, obj)
if out.Values[i] == graphql.Null {
invalids++
}
case "eventID":
out.Values[i] = ec._Event_eventID(ctx, field, obj)
if out.Values[i] == graphql.Null {
invalids++
}
case "values":
out.Values[i] = ec._Event_values(ctx, field, obj)
if out.Values[i] == graphql.Null {
invalids++
}
case "bytes":
out.Values[i] = ec._Event_bytes(ctx, field, obj)
if out.Values[i] == graphql.Null {
invalids++
}
case "meta":
out.Values[i] = ec._Event_meta(ctx, field, obj)
if out.Values[i] == graphql.Null {
invalids++
}
default:
panic("unknown field " + strconv.Quote(field.Name))
}
}
out.Dispatch()
if invalids > 0 {
return graphql.Null
}
return out
}
var metaImplementors = []string{"Meta"}
func (ec *executionContext) _Meta(ctx context.Context, sel ast.SelectionSet, obj *event.Meta) graphql.Marshaler {
@ -4083,6 +4650,29 @@ func (ec *executionContext) _Query(ctx context.Context, sel ast.SelectionSet) gr
switch field.Name {
case "__typename":
out.Values[i] = graphql.MarshalString("Query")
case "events":
field := field
innerFunc := func(ctx context.Context) (res graphql.Marshaler) {
defer func() {
if r := recover(); r != nil {
ec.Error(ctx, ec.Recover(ctx, r))
}
}()
res = ec._Query_events(ctx, field)
if res == graphql.Null {
atomic.AddUint32(&invalids, 1)
}
return res
}
rrm := func(ctx context.Context) graphql.Marshaler {
return ec.OperationContext.RootResolverMiddleware(ctx, innerFunc)
}
out.Concurrently(i, func() graphql.Marshaler {
return rrm(innerCtx)
})
case "posts":
field := field
@ -4247,6 +4837,8 @@ func (ec *executionContext) _Subscription(ctx context.Context, sel ast.Selection
}
switch fields[0].Name {
case "eventAdded":
return ec._Subscription_eventAdded(ctx, fields[0])
case "postAdded":
return ec._Subscription_postAdded(ctx, fields[0])
default:
@ -5126,6 +5718,13 @@ func (ec *executionContext) marshalOBoolean2ᚖbool(ctx context.Context, sel ast
return res
}
func (ec *executionContext) marshalOEvent2ᚖgithubᚗcomᚋsourᚑisᚋevᚋpkgᚋesᚐGQLEvent(ctx context.Context, sel ast.SelectionSet, v *es.GQLEvent) graphql.Marshaler {
if v == nil {
return graphql.Null
}
return ec._Event(ctx, sel, v)
}
func (ec *executionContext) unmarshalOInt2ᚖint64(ctx context.Context, v interface{}) (*int64, error) {
if v == nil {
return nil, nil

68
internal/lg/init.go Normal file
View File

@ -0,0 +1,68 @@
package lg
import (
"context"
"log"
"os"
"strings"
"go.uber.org/multierr"
)
func Init(ctx context.Context, name string) (context.Context, func() error) {
ctx, span := Span(ctx)
defer span.End()
stop := [3]func() error{
initLogger(name),
}
ctx, stop[1] = initMetrics(ctx, name)
ctx, stop[2] = initTracing(ctx, name)
reverse(stop[:])
return ctx, func() error {
log.Println("flushing logs...")
errs := make([]error, len(stop))
for i, fn := range stop {
if fn != nil {
errs[i] = fn()
}
}
log.Println("all stopped.")
return multierr.Combine(errs...)
}
}
func env(name, defaultValue string) string {
name = strings.TrimSpace(name)
defaultValue = strings.TrimSpace(defaultValue)
if v := strings.TrimSpace(os.Getenv(name)); v != "" {
log.Println("# ", name, "=", v)
return v
}
log.Println("# ", name, "=", defaultValue, "(default)")
return defaultValue
}
type secret string
func (s secret) String() string {
if s == "" {
return "(nil)"
}
return "***"
}
func (s secret) Secret() string {
return string(s)
}
func envSecret(name, defaultValue string) secret {
name = strings.TrimSpace(name)
defaultValue = strings.TrimSpace(defaultValue)
if v := strings.TrimSpace(os.Getenv(name)); v != "" {
log.Println("# ", name, "=", secret(v))
return secret(v)
}
log.Println("# ", name, "=", secret(defaultValue), "(default)")
return secret(defaultValue)
}

8
internal/logz/logger.go → internal/lg/logger.go
View File

@ -1,4 +1,4 @@
package logz
package lg
import (
"bytes"
@ -64,15 +64,15 @@ func initLogger(name string) func() error {
log.SetPrefix("[" + name + "] ")
log.SetFlags(log.LstdFlags&^(log.Ldate|log.Ltime) | log.Lshortfile)
token := env("LOGZIO_LOG_TOKEN", "")
token := envSecret("LOGZIO_LOG_TOKEN", "")
if token == "" {
return nil
}
l, err := logzio.New(
token,
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"

29
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 (
@ -71,9 +88,13 @@ func initTracing(ctx context.Context, name string) (context.Context, func() erro
return ctx, nil
}
exporterAddr := env("EV_TRACE_ENDPOINT", "")
if exporterAddr == "" {
return ctx, nil
}
traceExporter, err := otlptracehttp.New(ctx,
otlptracehttp.WithInsecure(),
otlptracehttp.WithEndpoint("localhost:4318"),
otlptracehttp.WithEndpoint(exporterAddr),
)
if err != nil {
log.Println(wrap(err, "failed to create trace exporter"))

42
internal/logz/init.go
View File

@ -1,42 +0,0 @@
package logz
import (
"context"
"log"
"os"
"go.uber.org/multierr"
)
func Init(ctx context.Context, name string) (context.Context, func() error) {
ctx, span := Span(ctx)
defer span.End()
stop := [3]func() error{
initLogger(name),
}
ctx, stop[1] = initMetrics(ctx, name)
ctx, stop[2] = initTracing(ctx, name)
reverse(stop[:])
return ctx, func() error {
log.Println("flushing logs...")
errs := make([]error, len(stop))
for i, fn := range stop {
if fn != nil {
errs[i] = fn()
}
}
log.Println("all stopped.")
return multierr.Combine(errs...)
}
}
func env(name, defaultValue string) string {
if v := os.Getenv(name); v != "" {
log.Println("# ", name, " = ", v)
return v
}
return defaultValue
}

103
main.go
View File

@ -7,19 +7,24 @@ import (
"os"
"os/signal"
"path"
"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"
@ -31,7 +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 {
@ -42,12 +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
@ -57,30 +70,62 @@ func run(ctx context.Context) error {
Addr: env("EV_HTTP", ":8080"),
}
salty, err := salty.New(ctx, es, path.Join(env("EV_BASE_URL", "http://localhost"+s.Addr), "inbox"))
if err != nil {
span.RecordError(err)
return err
if strings.HasPrefix(s.Addr, ":") {
s.Addr = "[::]" + s.Addr
}
msgbus, err := msgbus.New(ctx, es)
if err != nil {
span.RecordError(err)
return err
enable := set.New(strings.Fields(env("EV_ENABLE", "salty msgbus gql peers"))...)
var svcs []interface{ RegisterHTTP(*http.ServeMux) }
svcs = append(svcs, es)
if enable.Has("salty") {
span.AddEvent("Enable Salty")
salty, err := salty.New(ctx, es, path.Join(env("EV_BASE_URL", "http://"+s.Addr), "inbox"))
if err != nil {
span.RecordError(err)
return err
}
svcs = append(svcs, salty)
}
gql, err := gql.New(ctx, msgbus, salty)
if err != nil {
span.RecordError(err)
return err
if enable.Has("msgbus") {
span.AddEvent("Enable Msgbus")
msgbus, err := msgbus.New(ctx, es)
if err != nil {
span.RecordError(err)
return err
}
svcs = append(svcs, msgbus)
}
s.Handler = httpMux(logz.NewHTTP(ctx), msgbus, salty, gql)
if enable.Has("peers") {
span.AddEvent("Enable Peers")
peers, err := peerfinder.New(ctx, es)
if err != nil {
span.RecordError(err)
return err
}
svcs = append(svcs, peers)
}
if enable.Has("gql") {
span.AddEvent("Enable GraphQL")
gql, err := gql.New(ctx, svcs...)
if err != nil {
span.RecordError(err)
return err
}
svcs = append(svcs, gql)
}
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
}
@ -104,16 +149,12 @@ func run(ctx context.Context) error {
return nil
}
func env(name, defaultValue string) string {
if v := os.Getenv(name); v != "" {
log.Println("# ", name, " = ", v)
name = strings.TrimSpace(name)
defaultValue = strings.TrimSpace(defaultValue)
if v := strings.TrimSpace(os.Getenv(name)); v != "" {
log.Println("#", name, "=", v)
return v
}
log.Println("#", name, "=", defaultValue, "(default)")
return defaultValue
}
func httpMux(fns ...interface{ RegisterHTTP(*http.ServeMux) }) http.Handler {
mux := http.NewServeMux()
for _, fn := range fns {
fn.RegisterHTTP(mux)
}
return cors.AllowAll().Handler(mux)
}

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)

69
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)
@ -224,10 +226,14 @@ type PA[T any] interface {
event.Aggregate
*T
}
type PE[T any] interface {
event.Event
*T
}
// 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)
@ -257,7 +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)
@ -281,3 +287,30 @@ func Update[A any, T PA[A]](ctx context.Context, es *EventStore, streamID string
return
}
// 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 := lg.Span(ctx)
defer span.End()
agg = new(A)
agg.SetStreamID(streamID)
if err = es.Load(ctx, agg); err != nil {
return
}
if err = fn(ctx, agg); err != nil {
return
}
if err = event.ShouldExist(agg); err != nil {
return
}
if _, err = es.Save(ctx, agg); err != nil {
return
}
return
}

17
pkg/es/es.graphqls
View File

@ -4,4 +4,21 @@ type Meta @goModel(model: "github.com/sour-is/ev/pkg/es/event.Meta") {
streamID: String!
created: Time!
position: Int!
}
extend type Query {
events(streamID: String! paging: PageInput): Connection!
}
extend type Subscription {
"""after == 0 start from begining, after == -1 start from end"""
eventAdded(streamID: String! after: Int! = -1): Event
}
type Event implements Edge @goModel(model: "github.com/sour-is/ev/pkg/es.GQLEvent") {
id: ID!
eventID: String!
values: Map!
bytes: String!
meta: Meta!
}

8
pkg/es/event/aggregate.go
View File

@ -29,16 +29,16 @@ func Append(a Aggregate, lis ...Event) {
// NotExists returns error if there are no events present.
func NotExists(a Aggregate) error {
if a.StreamVersion() != 0 {
return fmt.Errorf("%w, got version == %d", ErrShouldNotExist, a.StreamVersion())
if a.Version() != 0 {
return fmt.Errorf("%w, got version == %d", ErrShouldNotExist, a.Version())
}
return nil
}
// ShouldExists returns error if there are no events present.
func ShouldExist(a Aggregate) error {
if a.StreamVersion() == 0 {
return fmt.Errorf("%w, got version == %d", ErrShouldExist, a.StreamVersion())
if a.Version() == 0 {
return fmt.Errorf("%w, got version == %d", ErrShouldExist, a.Version())
}
return nil
}

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,
}
}

40
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)
@ -246,3 +246,29 @@ func embedJSON(s string) json.RawMessage {
}
return []byte(fmt.Sprintf(`"%s"`, strings.Replace(s, `"`, `\"`, -1)))
}
func Values(e Event) map[string]any {
var a any = e
if e, ok := e.(interface{ Values() any }); ok {
a = e.Values()
}
m := make(map[string]any)
v := reflect.Indirect(reflect.ValueOf(a))
for _, idx := range reflect.VisibleFields(v.Type()) {
if !idx.IsExported() {
continue
}
field := v.FieldByIndex(idx.Index)
name := idx.Name
if n, ok := idx.Tag.Lookup("json"); ok {
name = n
}
m[name] = field.Interface()
}
return m
}

132
pkg/es/graph.go Normal file
View File

@ -0,0 +1,132 @@
package es
import (
"context"
"fmt"
"net/http"
"time"
"github.com/sour-is/ev/internal/lg"
"github.com/sour-is/ev/pkg/es/event"
"github.com/sour-is/ev/pkg/gql"
)
type EventResolver interface {
Events(ctx context.Context, streamID string, paging *gql.PageInput) (*gql.Connection, error)
EventAdded(ctx context.Context, streamID string, after int64) (<-chan *GQLEvent, error)
}
func (es *EventStore) Events(ctx context.Context, streamID string, paging *gql.PageInput) (*gql.Connection, error) {
ctx, span := lg.Span(ctx)
defer span.End()
lis, err := es.Read(ctx, streamID, paging.GetIdx(0), paging.GetCount(30))
if err != nil {
span.RecordError(err)
return nil, err
}
edges := make([]gql.Edge, 0, len(lis))
for i := range lis {
span.AddEvent(fmt.Sprint("event ", i, " of ", len(lis)))
edges = append(edges, &GQLEvent{lis[i]})
}
var first, last uint64
if first, err = es.FirstIndex(ctx, streamID); err != nil {
span.RecordError(err)
return nil, err
}
if last, err = es.LastIndex(ctx, streamID); err != nil {
span.RecordError(err)
return nil, err
}
return &gql.Connection{
Paging: &gql.PageInfo{
Next: lis.Last().EventMeta().Position < last,
Prev: lis.First().EventMeta().Position > first,
Begin: lis.First().EventMeta().Position,
End: lis.Last().EventMeta().Position,
},
Edges: edges,
}, nil
}
func (e *EventStore) EventAdded(ctx context.Context, streamID string, after int64) (<-chan *GQLEvent, error) {
ctx, span := lg.Span(ctx)
defer span.End()
es := e.EventStream()
if es == nil {
return nil, fmt.Errorf("EventStore does not implement streaming")
}
sub, err := es.Subscribe(ctx, streamID, after)
if err != nil {
span.RecordError(err)
return nil, err
}
ch := make(chan *GQLEvent)
go func() {
ctx, span := lg.Span(ctx)
defer span.End()
{
ctx, span := lg.Fork(ctx)
defer func() {
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)
if err != nil {
span.RecordError(err)
break
}
span.AddEvent(fmt.Sprintf("received %d events", len(events)))
for i := range events {
select {
case ch <- &GQLEvent{events[i]}:
continue
case <-ctx.Done():
return
}
}
}
}()
return ch, nil
}
func (*EventStore) RegisterHTTP(*http.ServeMux) {}
type GQLEvent struct {
e event.Event
}
func (e *GQLEvent) ID() string {
return fmt.Sprint(e.e.EventMeta().StreamID, "@", e.e.EventMeta().Position)
}
func (e *GQLEvent) EventID() string {
return e.e.EventMeta().GetEventID()
}
func (e *GQLEvent) Values() map[string]interface{} {
return event.Values(e.e)
}
func (e *GQLEvent) Bytes() (string, error) {
b, err := e.e.MarshalBinary()
return string(b), err
}
func (e *GQLEvent) Meta() *event.Meta {
meta := e.e.EventMeta()
return &meta
}
func (e *GQLEvent) IsEdge() {}

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()
}