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@ -2,18 +2,83 @@ package pubsub
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import (
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"context"
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"os"
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"os/signal"
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"sync"
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"github.com/edouardparis/lntop/app"
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"github.com/edouardparis/lntop/events"
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"github.com/edouardparis/lntop/logging"
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"github.com/edouardparis/lntop/network"
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"github.com/edouardparis/lntop/network/models"
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)
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type pubSub struct {
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stop chan bool
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logger logging.Logger
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network *network.Network
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wg *sync.WaitGroup
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}
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func newPubSub(logger logging.Logger, network *network.Network) *pubSub {
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return &pubSub{
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logger: logger.With(logging.String("logger", "pubsub")),
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network: network,
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wg: &sync.WaitGroup{},
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stop: make(chan bool),
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}
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}
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func (p *pubSub) invoices(ctx context.Context, sub chan *events.Event) {
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p.wg.Add(2)
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invoices := make(chan *models.Invoice)
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go func() {
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for {
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select {
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case <-p.stop:
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p.wg.Done()
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return
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default:
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invoice := <-invoices
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p.logger.Debug("receive invoice", logging.Object("invoice", invoice))
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}
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}
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}()
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go func() {
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select {
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case <-p.stop:
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p.wg.Done()
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return
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default:
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err := p.network.SubscribeInvoice(ctx, invoices)
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if err != nil {
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p.logger.Error("SubscribeInvoice returned an error", logging.Error(err))
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}
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}
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}()
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}
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func (p *pubSub) wait() {
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c := make(chan os.Signal, 1)
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signal.Notify(c, os.Interrupt)
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p.wg.Add(1)
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go func() {
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for sig := range c {
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p.logger.Debug("Received signal, gracefully stopping", logging.String("sig", sig.String()))
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p.wg.Done()
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close(p.stop)
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}
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}()
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p.wg.Wait()
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}
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func Run(ctx context.Context, app *app.App, sub chan *events.Event) error {
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logger := app.Logger.With(logging.String("logger", "pubsub"))
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wg := &sync.WaitGroup{}
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pubSub := newPubSub(app.Logger, app.Network)
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pubSub.logger.Debug("Starting...")
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logger.Debug("Starting...")
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wg.Wait()
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pubSub.invoices(ctx, sub)
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pubSub.wait()
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return nil
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}
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