Amazon.Glacier.Transfer.Internal.DownloadFileCommand.setupTopicAndQueue C# (CSharp) Method

        internal void setupTopicAndQueue()
        {
            var guidStr = Guid.NewGuid().ToString("N");
            this.topicArn = this.snsClient.CreateTopic(new CreateTopicRequest() { Name = "GlacierDownload-" + guidStr }).TopicArn;
            this.queueUrl = this.sqsClient.CreateQueue(new CreateQueueRequest() { QueueName = "GlacierDownload-" + guidStr }).QueueUrl;
            this.queueArn = this.sqsClient.GetQueueAttributes(new GetQueueAttributesRequest() { QueueUrl = this.queueUrl, AttributeNames = new List<string> { SQSConstants.ATTRIBUTE_QUEUE_ARN } }).Attributes[SQSConstants.ATTRIBUTE_QUEUE_ARN];

            this.snsClient.Subscribe(new SubscribeRequest()
            {
                Endpoint = this.queueArn,
                Protocol = "sqs",
                TopicArn = this.topicArn
            });

            var policy = SQS_POLICY.Replace("{QuereArn}", this.queueArn).Replace("{TopicArn}", this.topicArn);
            var setQueueAttributesRequest = new SetQueueAttributesRequest()
            {
                QueueUrl = this.queueUrl
            };
            setQueueAttributesRequest.Attributes.Add("Policy", policy);

            this.sqsClient.SetQueueAttributes(setQueueAttributesRequest);
        }