1 /*******************************************************************************
2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Modifications Copyright © 2021 Orange.
8 * ================================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END=========================================================
21 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
23 *******************************************************************************/
25 package org.onap.dmaap.mr.client;
27 import java.io.IOException;
28 import org.onap.dmaap.mr.client.response.MRConsumerResponse;
30 public interface MRConsumer extends MRClient {
32 * Fetch a set of messages. The consumer's timeout and message limit are used if set in the constructor call.
34 * @return a set of messages
37 Iterable<String> fetch() throws IOException, Exception;
40 * Fetch a set of messages with an explicit timeout and limit for this call. These values
41 * override any set in the constructor call.
43 * @param timeoutMs The amount of time in milliseconds that the server should keep the connection
44 * open while waiting for message traffic. Use -1 for default timeout (controlled on the server-side).
45 * @param limit A limit on the number of messages returned in a single call. Use -1 for no limit.
46 * @return a set messages
47 * @throws IOException if there's a problem connecting to the server
49 Iterable<String> fetch(int timeoutMs, int limit) throws IOException, Exception;
51 MRConsumerResponse fetchWithReturnConsumerResponse();
54 MRConsumerResponse fetchWithReturnConsumerResponse(int timeoutMs, int limit);