snapshot of https://github.com/ThreeDotsLabs/watermill.git (master, 2026-09-15; blobs > 131072B omitted)

_examples/pubsubs/sqlite/transaction.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/ThreeDotsLabs/watermill"
+	"github.com/ThreeDotsLabs/watermill-sqlite/wmsqlitemodernc"
+	"github.com/ThreeDotsLabs/watermill/message"
+)
+
+func publishWithInTransaction(db *sql.DB) {
+	tx, err := db.BeginTx(context.Background(), &sql.TxOptions{
+		Isolation: sql.LevelReadCommitted,
+	})
+	if err != nil {
+		panic(err)
+	}
+	defer func() {
+		_ = tx.Commit()
+	}()
+
+	publisher, err := wmsqlitemodernc.NewPublisher(
+		tx, // transaction presented as database
+		wmsqlitemodernc.PublisherOptions{
+			// schema must be initialized elsewhere before using
+			// the publisher within the transaction
+			InitializeSchema: false,
+		},
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	msg := message.NewMessage(watermill.NewUUID(), []byte(`{"message": "Hello, world!"}`))
+	if err := publisher.Publish("example_topic", msg); err != nil {
+		_ = tx.Rollback()
+		panic(err)
+	}
+}