feat: inprogress

.air.toml

@@ -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]

app/gql/resolver.go

@@ -0,0 +1,123 @@
+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/logz"
+	"github.com/sour-is/ev/pkg/gql"
+	"github.com/vektah/gqlparser/v2/gqlerror"
+)
+
+type Resolver struct {
+	msgbus.MsgbusResolver
+	salty.SaltyResolver
+}
+
+func New(ctx context.Context, resolvers ...interface{ RegisterHTTP(*http.ServeMux) }) (*Resolver, error) {
+	_, span := logz.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)
+				break 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", logz.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)
+
+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) RegisterHTTP(*http.ServeMux) {}

app/msgbus/service.go

@@ -31,6 +31,7 @@ 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) {

app/peerfinder/peer.go

@@ -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)
+}

app/peerfinder/service.go

@@ -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/logz"
+	"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 := logz.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/", logz.Htrace(s, "peers"))
+
+}
+func (s *service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+
+	_, span := logz.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 := logz.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
+}

app/salty/service.go

@@ -35,6 +35,7 @@ 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) {
@@ -69,7 +70,7 @@ func (s *service) BaseURL() string {
 	}
 	return s.baseURL
 }
-func(s *service) RegisterHTTP(mux *http.ServeMux) {
+func (s *service) RegisterHTTP(mux *http.ServeMux) {
 	mux.Handle("/.well-known/salty/", logz.Htrace(s, "lookup"))
 }
 func (s *service) ServeHTTP(w http.ResponseWriter, r *http.Request) {

env

@@ -0,0 +1,5 @@
+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

go.mod

@@ -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
 )

go.sum

@@ -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=

internal/graph/generated/generated.go

@@ -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/internal/graph/model"
 	"github.com/sour-is/ev/pkg/es/event"
 	"github.com/sour-is/ev/pkg/gql"
 	gqlparser "github.com/vektah/gqlparser/v2"
@@ -56,6 +57,13 @@ type ComplexityRoot struct {
 		Paging func(childComplexity int) int
 	}
 
+	Event struct {
+		EventID   func(childComplexity int) int
+		EventMeta func(childComplexity int) int
+		ID        func(childComplexity int) int
+		Values    func(childComplexity int) int
+	}
+
 	Meta struct {
 		Created    func(childComplexity int) int
 		GetEventID func(childComplexity int) int
@@ -83,6 +91,7 @@ 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 +105,8 @@ 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 +118,12 @@ 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 *model.Event, error)
 	PostAdded(ctx context.Context, streamID string, after int64) (<-chan *msgbus.PostEvent, error)
 }
 
@@ -144,6 +156,34 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 
 		return e.complexity.Connection.Paging(childComplexity), true
 
+	case "Event.eventID":
+		if e.complexity.Event.EventID == nil {
+			break
+		}
+
+		return e.complexity.Event.EventID(childComplexity), true
+
+	case "Event.eventMeta":
+		if e.complexity.Event.EventMeta == nil {
+			break
+		}
+
+		return e.complexity.Event.EventMeta(childComplexity), true
+
+	case "Event.id":
+		if e.complexity.Event.ID == nil {
+			break
+		}
+
+		return e.complexity.Event.ID(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 +287,18 @@ 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 +358,18 @@ 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 +481,22 @@ 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 {
+    id: ID!
+
+    eventID: String!
+    values: Map!
+    eventMeta: Meta!
 }`, BuiltIn: false},
 	{Name: "../../../pkg/gql/common.graphqls", Input: `scalar Time
 scalar Map
@@ -550,6 +630,30 @@ 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 +693,30 @@ 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 +877,192 @@ 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 *model.Event) (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:   false,
+		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 *model.Event) (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:   false,
+		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 *model.Event) (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:   false,
+		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_eventMeta(ctx context.Context, field graphql.CollectedField, obj *model.Event) (ret graphql.Marshaler) {
+	fc, err := ec.fieldContext_Event_eventMeta(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.EventMeta, 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_eventMeta(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
+	fc = &graphql.FieldContext{
+		Object:     "Event",
+		Field:      field,
+		IsMethod:   false,
+		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 +1707,67 @@ 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 +2244,82 @@ 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 *model.Event):
+			if !ok {
+				return nil
+			}
+			return graphql.WriterFunc(func(w io.Writer) {
+				w.Write([]byte{'{'})
+				graphql.MarshalString(field.Alias).MarshalGQL(w)
+				w.Write([]byte{':'})
+				ec.marshalOEvent2ᚖgithubᚗcomᚋsourᚑisᚋevᚋinternalᚋgraphᚋmodelᚐEvent(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 "eventMeta":
+				return ec.fieldContext_Event_eventMeta(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 +4263,13 @@ func (ec *executionContext) _Edge(ctx context.Context, sel ast.SelectionSet, obj
 	switch obj := (obj).(type) {
 	case nil:
 		return graphql.Null
+	case model.Event:
+		return ec._Event(ctx, sel, &obj)
+	case *model.Event:
+		if obj == nil {
+			return graphql.Null
+		}
+		return ec._Event(ctx, sel, obj)
 	case *msgbus.PostEvent:
 		if obj == nil {
 			return graphql.Null
@@ -3861,6 +4319,55 @@ 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 *model.Event) 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 "eventMeta":
+
+			out.Values[i] = ec._Event_eventMeta(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 +4590,29 @@ 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 +4777,8 @@ 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 +5658,13 @@ func (ec *executionContext) marshalOBoolean2ᚖbool(ctx context.Context, sel ast
 	return res
 }
 
+func (ec *executionContext) marshalOEvent2ᚖgithubᚗcomᚋsourᚑisᚋevᚋinternalᚋgraphᚋmodelᚐEvent(ctx context.Context, sel ast.SelectionSet, v *model.Event) 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

internal/graph/model/models_gen.go

@@ -1,3 +1,16 @@
 // Code generated by github.com/99designs/gqlgen, DO NOT EDIT.
 
 package model
+
+import (
+	"github.com/sour-is/ev/pkg/es/event"
+)
+
+type Event struct {
+	ID        string                 `json:"id"`
+	EventID   string                 `json:"eventID"`
+	Values    map[string]interface{} `json:"values"`
+	EventMeta *event.Meta            `json:"eventMeta"`
+}
+
+func (Event) IsEdge() {}

internal/logz/init.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"log"
 	"os"
+	"strings"
 
 	"go.uber.org/multierr"
 )
@@ -34,9 +35,34 @@ func Init(ctx context.Context, name string) (context.Context, func() error) {
 }
 
 func env(name, defaultValue string) string {
-	if v := os.Getenv(name); v != "" {
+	name = strings.TrimSpace(name)
-		log.Println("# ", name, " = ", v)
+	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)
+}

internal/logz/logger.go

@@ -64,13 +64,13 @@ 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.SetDrainDuration(time.Second*5),

internal/logz/tracer.go

@@ -71,9 +71,13 @@ 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"))

main.go

@@ -1,12 +1,15 @@
 package main
 
 import (
+	"bytes"
 	"context"
+	"fmt"
 	"log"
 	"net/http"
 	"os"
 	"os/signal"
 	"path"
+	"strings"
 	"time"
 
 	"github.com/rs/cors"
@@ -14,6 +17,7 @@ import (
 
 	"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/pkg/es"
@@ -57,25 +61,55 @@ 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 strings.HasPrefix(s.Addr, ":") {
-		if err != nil {
+			s.Addr = "[::]" + s.Addr
-			span.RecordError(err)
-			return err
 		}
 
-		msgbus, err := msgbus.New(ctx, es)
+		enable := set(strings.Fields(env("EV_ENABLE", "salty msgbus gql peers"))...)
-		if err != nil {
+		var svcs []interface{ RegisterHTTP(*http.ServeMux) }
-			span.RecordError(err)
+
-			return err
+		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 enable.Has("msgbus") {
-		if err != nil {
+			span.AddEvent("Enable Msgbus")
-			span.RecordError(err)
+			msgbus, err := msgbus.New(ctx, es)
-			return err
+			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, logz.NewHTTP(ctx))
+
+		s.Handler = httpMux(svcs...)
 
 		log.Print("Listen on ", s.Addr)
 		span.AddEvent("begin listen and serve")
@@ -104,10 +138,13 @@ func run(ctx context.Context) error {
 	return nil
 }
 func env(name, defaultValue string) string {
-	if v := os.Getenv(name); v != "" {
+	name = strings.TrimSpace(name)
-		log.Println("# ", name, " = ", v)
+	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 {
@@ -117,3 +154,32 @@ func httpMux(fns ...interface{ RegisterHTTP(*http.ServeMux) }) http.Handler {
 	}
 	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()
+}

pkg/es/es.go

@@ -224,6 +224,10 @@ 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) {
@@ -281,3 +285,30 @@ 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 := logz.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
+}

pkg/es/es.graphqls

@@ -5,3 +5,19 @@ type Meta @goModel(model: "github.com/sour-is/ev/pkg/es/event.Meta") {
     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 {
+    id: ID!
+
+    eventID: String!
+    values: Map!
+    eventMeta: Meta!
+}

pkg/es/event/aggregate.go

@@ -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 {
+	if a.Version() != 0 {
-		return fmt.Errorf("%w, got version == %d", ErrShouldNotExist, a.StreamVersion())
+		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 {
+	if a.Version() == 0 {
-		return fmt.Errorf("%w, got version == %d", ErrShouldExist, a.StreamVersion())
+		return fmt.Errorf("%w, got version == %d", ErrShouldExist, a.Version())
 	}
 	return nil
 }

pkg/es/event/reflect.go

@@ -246,3 +246,12 @@ func embedJSON(s string) json.RawMessage {
 	}
 	return []byte(fmt.Sprintf(`"%s"`, strings.Replace(s, `"`, `\"`, -1)))
 }
+
+func values(e Event) map[string]any {
+	m := make(map[string]any)
+	v := reflect.ValueOf(e)
+	for _, idx := range reflect.VisibleFields(v) {
+		field := v.FieldByIndex(idx.Index)
+		m[field.]
+	}
+}