@SdkInternalApi
    final DescribeEventSubscriptionsResult executeDescribeEventSubscriptions(DescribeEventSubscriptionsRequest describeEventSubscriptionsRequest) {

        ExecutionContext executionContext = createExecutionContext(describeEventSubscriptionsRequest);
        AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
        awsRequestMetrics.startEvent(Field.ClientExecuteTime);
        Request<DescribeEventSubscriptionsRequest> request = null;
        Response<DescribeEventSubscriptionsResult> response = null;

        try {
            awsRequestMetrics.startEvent(Field.RequestMarshallTime);
            try {
                request = new DescribeEventSubscriptionsRequestMarshaller().marshall(super.beforeMarshalling(describeEventSubscriptionsRequest));
                // Binds the request metrics to the current request.
                request.setAWSRequestMetrics(awsRequestMetrics);
                request.addHandlerContext(HandlerContextKey.CLIENT_ENDPOINT, endpoint);
                request.addHandlerContext(HandlerContextKey.ENDPOINT_OVERRIDDEN, isEndpointOverridden());
                request.addHandlerContext(HandlerContextKey.SIGNING_REGION, getSigningRegion());
                request.addHandlerContext(HandlerContextKey.SERVICE_ID, "RDS");
                request.addHandlerContext(HandlerContextKey.OPERATION_NAME, "DescribeEventSubscriptions");
                request.addHandlerContext(HandlerContextKey.ADVANCED_CONFIG, advancedConfig);

            } finally {
                awsRequestMetrics.endEvent(Field.RequestMarshallTime);
            }

            StaxResponseHandler<DescribeEventSubscriptionsResult> responseHandler = new StaxResponseHandler<DescribeEventSubscriptionsResult>(
                    new DescribeEventSubscriptionsResultStaxUnmarshaller());

            response = invoke(request, responseHandler, executionContext);

            return response.getAwsResponse();

        } finally {

            endClientExecution(awsRequestMetrics, request, response);
        }
    }
<p>
Lists all the subscription descriptions for a customer account. The description for a subscription includes
<code>SubscriptionName</code>, <code>SNSTopicARN</code>, <code>CustomerID</code>, <code>SourceType</code>,
<code>SourceID</code>, <code>CreationTime</code>, and <code>Status</code>.
</p>
<p>
If you specify a <code>SubscriptionName</code>, lists the description for that subscription.
</p>

@param describeEventSubscriptionsRequest
@return Result of the DescribeEventSubscriptions operation returned by the service.
@throws SubscriptionNotFoundException
        The subscription name does not exist.
@sample AmazonRDS.DescribeEventSubscriptions
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/DescribeEventSubscriptions" target="_top">AWS
     API Documentation</a>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/AmazonRDSClient.java