80 строки
1.6 KiB
Go
80 строки
1.6 KiB
Go
package servicebus_test
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import (
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"context"
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"fmt"
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"os"
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"time"
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"github.com/Azure/azure-amqp-common-go/v3/uuid"
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"github.com/Azure/azure-service-bus-go"
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)
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func Example_duplicateMessageDetection() {
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ctx, cancel := context.WithTimeout(context.Background(), 40*time.Second)
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defer cancel()
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connStr := os.Getenv("SERVICEBUS_CONNECTION_STRING")
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if connStr == "" {
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fmt.Println("FATAL: expected environment variable SERVICEBUS_CONNECTION_STRING not set")
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return
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}
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// Create a client to communicate with a Service Bus Namespace.
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ns, err := servicebus.NewNamespace(servicebus.NamespaceWithConnectionString(connStr))
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if err != nil {
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fmt.Println(err)
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return
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}
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window := 30 * time.Second
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qm := ns.NewQueueManager()
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qe, err := ensureQueue(ctx, qm, "DuplicateDetectionExample", servicebus.QueueEntityWithDuplicateDetection(&window))
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if err != nil {
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fmt.Println(err)
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return
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}
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q, err := ns.NewQueue(qe.Name)
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if err != nil {
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fmt.Println(err)
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return
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}
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defer func() {
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_ = q.Close(ctx)
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}()
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guid, err := uuid.NewV4()
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if err != nil {
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fmt.Println(err)
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return
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}
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msg := servicebus.NewMessageFromString("foo")
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msg.ID = guid.String()
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// send the message twice with the same ID
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for i := 0; i < 2; i++ {
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if err := q.Send(ctx, msg); err != nil {
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fmt.Println(err)
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return
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}
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}
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// there should be only 1 message received from the queue
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go func() {
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if err := q.Receive(ctx, MessagePrinter{}); err != nil {
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if err.Error() != "context canceled" {
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fmt.Println(err)
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return
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}
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}
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}()
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time.Sleep(2 * time.Second)
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// Output:
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// foo
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}
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