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/*
* ===============================LICENSE_START======================================
* dcae-analytics
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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
*
* http://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.
* ============================LICENSE_END===========================================
*/
package org.openecomp.dcae.apod.analytics.dmaap.service.subscriber;
import org.openecomp.dcae.apod.analytics.dmaap.domain.config.DMaaPMRPublisherConfig;
import org.openecomp.dcae.apod.analytics.dmaap.domain.response.DMaaPMRSubscriberResponse;
import java.util.Date;
/**
* <p>
* DMaaP MR Subscriber can be used to subscribe messages from DMaaP MR Topics.
* <p>
*
* @author Rajiv Singla . Creation Date: 10/13/2016.
*/
public interface DMaaPMRSubscriber extends AutoCloseable {
/**
* Fetches Messages from DMaaP MR Topic. {@link DMaaPMRPublisherConfig} settings parameters
* for messageLimit and message timeout are used
*
* @return DMaaP Message Router Subscriber Response
*/
DMaaPMRSubscriberResponse fetchMessages();
/**
* Returns the Subscriber instance creation time
* <p>
* NOTE: Due to DMaaP API Design - Subscribers can only fetch messages which
* are published to the topic after the creation of the Subscriber.
*
* @return creation time of Subscriber instance
*/
Date getSubscriberCreationTime();
}
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