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

_examples/pubsubs/sqlite-zombiezen/transaction.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"github.com/ThreeDotsLabs/watermill"
+	"github.com/ThreeDotsLabs/watermill-sqlite/wmsqlitezombiezen"
+	"github.com/ThreeDotsLabs/watermill/message"
+	"zombiezen.com/go/sqlite"
+	"zombiezen.com/go/sqlite/sqlitex"
+)
+
+func publishWithInTransaction(connectionDSN string) {
+	var err error
+	// create a new connection for each transaction
+	// unless you guard it with a sync.Mutex
+	conn, err := sqlite.OpenConn(connectionDSN)
+	if err != nil {
+		panic(err)
+	}
+	defer conn.Close()
+
+	closer := sqlitex.Transaction(conn)
+	defer func() {
+		if closer(&err); err != nil {
+			panic(err)
+		}
+	}()
+
+	publisher, err := wmsqlitezombiezen.NewPublisher(
+		conn,
+		wmsqlitezombiezen.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 {
+		panic(err)
+	}
+}