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create_pubsub_export_subscription.go
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create_pubsub_export_subscription.go
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package admin
// [START pubsublite_create_pubsub_export_subscription]
import (
"context"
"fmt"
"io"
"cloud.google.com/go/pubsublite"
)
func createPubsubExportSubscription(w io.Writer, projectID, region, location, topicID, subID, pubsubTopicID string) error {
// projectID := "my-project-id"
// region := "us-central1"
// NOTE: location can be either a region ("us-central1") or a zone ("us-central1-a")
// For a list of valid locations, see https://cloud.google.com/pubsub/lite/docs/locations.
// location := "us-central1"
// NOTE: topic and subscription must be in the same region/zone (e.g. "us-central1-a")
// topicID := "my-topic"
// subID := "my-subscription"
// pubsubTopicID := "destination-topic-id"
ctx := context.Background()
client, err := pubsublite.NewAdminClient(ctx, region)
if err != nil {
return fmt.Errorf("pubsublite.NewAdminClient: %v", err)
}
defer client.Close()
// Initialize the subscription to the oldest retained messages for each
// partition.
targetLocation := pubsublite.AtTargetLocation(pubsublite.Beginning)
sub, err := client.CreateSubscription(ctx, pubsublite.SubscriptionConfig{
Name: fmt.Sprintf("projects/%s/locations/%s/subscriptions/%s", projectID, location, subID),
Topic: fmt.Sprintf("projects/%s/locations/%s/topics/%s", projectID, location, topicID),
DeliveryRequirement: pubsublite.DeliverImmediately, // Can also be DeliverAfterStored.
// Configures an export subscription that writes messages to a Pub/Sub topic.
ExportConfig: &pubsublite.ExportConfig{
DesiredState: pubsublite.ExportActive, // Can also be ExportPaused.
Destination: &pubsublite.PubSubDestinationConfig{
Topic: fmt.Sprintf("projects/%s/topics/%s", projectID, pubsubTopicID),
},
},
}, targetLocation)
if err != nil {
return fmt.Errorf("client.CreateSubscription got err: %v", err)
}
fmt.Fprintf(w, "Created export subscription: %s\n", sub.Name)
return nil
}
// [END pubsublite_create_pubsub_export_subscription]