/*******************************************************************************
 *  ============LICENSE_START=======================================================
 *  org.onap.dmaap
 *  ================================================================================
 *  Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 *  ================================================================================
 *  Modifications Copyright © 2021 Orange.
 *  ================================================================================
 *  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=========================================================
 *
 *  ECOMP is a trademark and service mark of AT&T Intellectual Property.
 *
 *******************************************************************************/
package org.onap.dmaap.mr.test.clients;

import org.onap.dmaap.mr.client.MRClientFactory;
import org.onap.dmaap.mr.client.MRConsumer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.LinkedList;

public class SampleConsumer {
    private SampleConsumer() {
    }

    public static void main(String[] args) {
        final Logger logger = LoggerFactory.getLogger(SampleConsumer.class);


        logger.info("Sample Consumer Class executing");
        final String topic = "org.onap.dmaap.mr.testingTopic";
        final String url = (args.length > 1 ? args[1] : "localhost:8181");
        final String group = (args.length > 2 ? args[2] : "grp");

        final String id = (args.length > 3 ? args[3] : "1");

        long count = 0;
        long nextReport = 5000;

        final long startMs = System.currentTimeMillis();

        final LinkedList<String> urlList = new LinkedList<>();
        for (String u : url.split(",")) {
            urlList.add(u);
        }

        final MRConsumer cc = MRClientFactory.createConsumer(urlList, topic, group, id, 10 * 1000, 1000, null, "CG0TXc2Aa3v8LfBk", "pj2rhxJWKP23pgy8ahMnjH88");
        try {
            while (true) {
                for (String msg : cc.fetch()) {
                    logger.info("" + (++count) + ": " + msg);
                }

                if (count > nextReport) {
                    nextReport += 5000;

                    final long endMs = System.currentTimeMillis();
                    final long elapsedMs = endMs - startMs;
                    final double elapsedSec = elapsedMs / 1000.0;
                    final double eps = count / elapsedSec;
                    logger.info("Consumed " + count + " in " + elapsedSec + "; " + eps + " eps");
                }
                logger.info("" + (++count) + ": consumed message");
            }
        } catch (Exception x) {
            logger.error(x.getClass().getName() + ": " + x.getMessage());
            throw new IllegalArgumentException(x);
        }
    }
}