1 /*******************************************************************************
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
10 * http://www.apache.org/licenses/LICENSE-2.0
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13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 * ============LICENSE_END=========================================================
19 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
21 *******************************************************************************/
22 package org.onap.dmaap.mr.client;
24 import java.io.IOException;
26 import org.onap.dmaap.mr.client.response.MRConsumerResponse;
28 public interface MRConsumer extends MRClient
31 * Fetch a set of messages. The consumer's timeout and message limit are used if set in the constructor call.
33 * @return a set of messages
36 Iterable<String> fetch () throws IOException, Exception;
39 * Fetch a set of messages with an explicit timeout and limit for this call. These values
40 * override any set in the constructor call.
42 * @param timeoutMs The amount of time in milliseconds that the server should keep the connection
43 * open while waiting for message traffic. Use -1 for default timeout (controlled on the server-side).
44 * @param limit A limit on the number of messages returned in a single call. Use -1 for no limit.
45 * @return a set messages
46 * @throws IOException if there's a problem connecting to the server
48 Iterable<String> fetch ( int timeoutMs, int limit ) throws IOException, Exception;
50 MRConsumerResponse fetchWithReturnConsumerResponse ();
53 MRConsumerResponse fetchWithReturnConsumerResponse ( int timeoutMs, int limit );