71 lines
1.7 KiB
Go
71 lines
1.7 KiB
Go
// Sources for https://watermill.io/docs/getting-started/
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package main
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import (
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"context"
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"log"
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"time"
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"github.com/ThreeDotsLabs/watermill"
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"github.com/ThreeDotsLabs/watermill-sqlite/wmsqlitezombiezen"
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"github.com/ThreeDotsLabs/watermill/message"
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_ "modernc.org/sqlite"
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"zombiezen.com/go/sqlite"
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)
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func main() {
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logger := watermill.NewStdLogger(false, false)
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// &cache=shared is critical, see: https://github.com/zombiezen/go-sqlite/issues/92#issuecomment-2052330643
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// connectionDSN := "file:db.sqlite3?journal_mode=WAL&busy_timeout=1000&secure_delete=true&foreign_keys=true&cache=shared"
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connectionDSN := "file:ephemeral?mode=memory&cache=shared"
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conn, err := sqlite.OpenConn(connectionDSN)
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if err != nil {
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panic(err)
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}
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defer conn.Close()
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publisher, err := wmsqlitezombiezen.NewPublisher(conn, wmsqlitezombiezen.PublisherOptions{
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InitializeSchema: true,
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Logger: logger,
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})
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if err != nil {
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panic(err)
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}
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subscriber, err := wmsqlitezombiezen.NewSubscriber(connectionDSN, wmsqlitezombiezen.SubscriberOptions{
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InitializeSchema: true,
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Logger: logger,
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})
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if err != nil {
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panic(err)
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}
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messages, err := subscriber.Subscribe(context.Background(), "example_topic")
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if err != nil {
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panic(err)
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}
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go process(messages)
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publishMessages(publisher)
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}
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func publishMessages(publisher message.Publisher) {
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for {
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msg := message.NewMessage(watermill.NewUUID(), []byte(`{"message": "Hello from ZombieZen!"}`))
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if err := publisher.Publish("example_topic", msg); err != nil {
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panic(err)
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}
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time.Sleep(time.Second)
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}
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}
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func process(messages <-chan *message.Message) {
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for msg := range messages {
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log.Printf("ZombieZen received message: %s, payload: %s", msg.UUID, string(msg.Payload))
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msg.Ack()
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}
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}
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