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main.go
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main.go
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package main
import (
"context"
"flag"
"log"
"os"
"strings"
nats "github.com/nats-io/nats.go"
"github.com/romashorodok/news-tracker/pkg/executils"
"github.com/romashorodok/news-tracker/pkg/natsinfo"
"github.com/romashorodok/news-tracker/worker/internal/prebuiltemplate"
"go.uber.org/fx"
)
func main() {
<-fx.New(
fx.Provide(
natsinfo.NewNatsConfig,
natsinfo.NewNatsConnection,
),
fx.Invoke(func(conn *nats.Conn, js nats.JetStreamContext) {
// second - 1000000000
// 30 * second - 30000000000
// minute - 60000000000
// 10 * minute - 600000000000
// 30 * minute - 1800000000000
var prebuiltemplateConfig prebuiltemplate.ConfigFlag
flag.Var(&prebuiltemplateConfig, "template", "Enter config for parsing the source")
flag.Parse()
if len(prebuiltemplateConfig) == 0 {
panic("Enter config for parsing the source by `-template` flag")
}
log.Printf("Running with the config: %+v", prebuiltemplateConfig)
if _, err := natsinfo.CreateOrUpdateStream(js, natsinfo.ARTICLES_STREAM_CONFIG); err != nil {
log.Panicf("unable set-up nats %s stream. Err:%s", natsinfo.ARTICLES_STREAM_CONFIG.Name, err)
os.Exit(1)
}
executils.BatchExec(prebuiltemplateConfig,
func(config prebuiltemplate.NewsFeedConfig) {
newsFeed := prebuiltemplate.NewNewsFeedProcessor(config)
go newsFeed.Start(context.Background())
for article := range newsFeed.GetArticleChan() {
origin := strings.ReplaceAll(article.Origin, ".", "_")
subject := natsinfo.ArticlesStream_NewArticleSubject(origin, article.Title)
payload, err := article.Marshal()
if err != nil {
log.Printf("Feiled serialize article. Err: %s", err)
log.Printf("%+v", article)
continue
}
result, err := js.Publish(subject, payload)
log.Printf("Publish into nats %+v %+v", result, err)
log.Printf("%+v", article)
}
})
}),
).Wait()
}