107 lines
2.0 KiB
Go
107 lines
2.0 KiB
Go
package nats
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import (
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"context"
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"encoding/json"
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nats "github.com/nats-io/nats.go"
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"github.com/nats-io/nats.go/jetstream"
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geEvent "github.com/grassrootseconomics/eth-tracker/pkg/event"
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"git.defalsify.org/vise.git/logging"
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"git.defalsify.org/vise.git/db"
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"git.grassecon.net/urdt/ussd/common"
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"git.grassecon.net/term/event"
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)
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var (
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logg = logging.NewVanilla().WithDomain("term-nats")
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)
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type NatsSubscription struct {
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event.Router
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ctx context.Context
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conn *nats.Conn
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js jetstream.JetStream
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cs jetstream.Consumer
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cctx jetstream.ConsumeContext
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}
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func NewNatsSubscription(store db.Db) *NatsSubscription {
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return &NatsSubscription{
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Router: event.Router{
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Store: &common.UserDataStore{
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Db: store,
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},
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},
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}
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}
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func(n *NatsSubscription) Connect(ctx context.Context, connStr string) error {
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var err error
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n.conn, err = nats.Connect(connStr)
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if err != nil {
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return err
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}
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n.js, err = jetstream.New(n.conn)
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if err != nil {
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return err
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}
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n.cs, err = n.js.CreateConsumer(ctx, "TRACKER", jetstream.ConsumerConfig{
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Name: "omnom",
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Durable: "omnom",
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FilterSubjects: []string{"TRACKER.*"},
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})
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if err != nil {
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return err
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}
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n.ctx = ctx
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n.cctx, err = n.cs.Consume(n.handleEvent)
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if err != nil {
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return err
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}
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return nil
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}
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func(n *NatsSubscription) Close() error {
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n.cctx.Stop()
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select {
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case <-n.cctx.Closed():
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n.conn.Close()
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}
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return nil
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}
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func fail(m jetstream.Msg) {
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err := m.Nak()
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if err != nil {
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logg.Errorf("nats nak fail", "err", err)
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}
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}
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func(n *NatsSubscription) handleEvent(m jetstream.Msg) {
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var ev geEvent.Event
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logg.DebugCtxf(n.ctx, "have msg", "err", m)
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b := m.Data()
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err := json.Unmarshal(b, &ev)
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if err != nil {
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logg.ErrorCtxf(n.ctx, "nats msg deserialize fail", "err", err)
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//fail(m)
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} else {
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err = n.Route(n.ctx, &ev)
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if err != nil {
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logg.ErrorCtxf(n.ctx, "handler route fail", "err", err)
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//fail(m)
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}
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}
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err = m.Ack()
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if err != nil {
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logg.ErrorCtxf(n.ctx, "ack fail", "err", err)
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panic("ack fail")
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}
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logg.DebugCtxf(n.ctx, "handle msg complete")
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}
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