v1 创建采用“仅传送一次”传送模式的订阅（已废弃）

（已弃用）创建采用“仅传送一次”传送的订阅

代码示例

Go

在尝试此示例之前，请按照《Pub/Sub 快速入门：使用客户端库》中的 Go 设置说明执行操作。如需了解详情，请参阅 Pub/Sub Go API 参考文档。

如需向 Pub/Sub 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为本地开发环境设置身份验证。

import (
	"context"
	"fmt"
	"io"

	"cloud.google.com/go/pubsub"
)

func createSubscriptionWithExactlyOnceDelivery(w io.Writer, projectID, subID string, topic *pubsub.Topic) error {
	// projectID := "my-project-id"
	// subID := "my-sub"
	// topic of type https://godoc.org/cloud.google.com/go/pubsub#Topic
	ctx := context.Background()
	client, err := pubsub.NewClient(ctx, projectID)
	if err != nil {
		return fmt.Errorf("pubsub.NewClient: %w", err)
	}
	defer client.Close()

	sub, err := client.CreateSubscription(ctx, subID, pubsub.SubscriptionConfig{
		Topic:                     topic,
		EnableExactlyOnceDelivery: true,
	})
	if err != nil {
		return err
	}
	fmt.Fprintf(w, "Created a subscription with exactly once delivery enabled: %v\n", sub)
	return nil
}

Ruby

在尝试此示例之前，请按照《Pub/Sub 快速入门：使用客户端库》中的 Ruby 设置说明执行操作。如需了解详情，请参阅 Pub/Sub Ruby API 参考文档。

如需向 Pub/Sub 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为本地开发环境设置身份验证。

require "google/cloud/pubsub"

# Shows how to create a new subscription with exactly once delivery enabled
class PubsubCreateSubscriptionWithExactlyOnceDelivery
  def create_subscription_with_exactly_once_delivery project_id:, topic_id:, subscription_id:
    pubsub = Google::Cloud::Pubsub.new project_id: project_id
    topic = pubsub.topic topic_id
    subscription = topic.subscribe subscription_id, enable_exactly_once_delivery: true
    puts "Created subscription with exactly once delivery enabled: #{subscription_id}"
  end

  def self.run
    # TODO(developer): Replace these variables before running the sample.
    project_id = "your-project-id"
    topic_id = "your-topic-id"
    subscription_id = "id-for-new-subcription"
    pubsub_old_version_create_subscription_with_exactly_once_delivery = PubsubCreateSubscriptionWithExactlyOnceDelivery.new
    pubsub_old_version_create_subscription_with_exactly_once_delivery.create_subscription_with_exactly_once_delivery(
      project_id: project_id,
      topic_id: topic_id,
      subscription_id: subscription_id
    )
  end
end

if $PROGRAM_NAME == __FILE__
  PubsubCreateSubscriptionWithExactlyOnceDelivery.run
end

后续步骤

如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅Google Cloud 示例浏览器。