2 * ===============================LICENSE_START======================================
4 * ================================================================================
5 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============================LICENSE_END===========================================
21 package org.openecomp.dcae.apod.analytics.dmaap.service.subscriber;
23 import org.openecomp.dcae.apod.analytics.dmaap.domain.config.DMaaPMRPublisherConfig;
24 import org.openecomp.dcae.apod.analytics.dmaap.domain.response.DMaaPMRSubscriberResponse;
26 import java.util.Date;
30 * DMaaP MR Subscriber can be used to subscribe messages from DMaaP MR Topics.
33 * @author Rajiv Singla . Creation Date: 10/13/2016.
35 public interface DMaaPMRSubscriber extends AutoCloseable {
38 * Fetches Messages from DMaaP MR Topic. {@link DMaaPMRPublisherConfig} settings parameters
39 * for messageLimit and message timeout are used
41 * @return DMaaP Message Router Subscriber Response
43 DMaaPMRSubscriberResponse fetchMessages();
47 * Returns the Subscriber instance creation time
49 * NOTE: Due to DMaaP API Design - Subscribers can only fetch messages which
50 * are published to the topic after the creation of the Subscriber.
52 * @return creation time of Subscriber instance
54 Date getSubscriberCreationTime();