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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.cdap.tca.worker;
import co.cask.cdap.api.metrics.Metrics;
import co.cask.cdap.api.worker.WorkerContext;
import com.google.common.base.Optional;
import org.openecomp.dcae.apod.analytics.cdap.common.CDAPMetricsConstants;
import org.openecomp.dcae.apod.analytics.cdap.common.utils.DMaaPMRUtils;
import org.openecomp.dcae.apod.analytics.common.AnalyticsConstants;
import org.openecomp.dcae.apod.analytics.common.exception.DCAEAnalyticsRuntimeException;
import org.openecomp.dcae.apod.analytics.dmaap.service.subscriber.DMaaPMRSubscriber;
import org.quartz.DisallowConcurrentExecution;
import org.quartz.Job;
import org.quartz.JobDataMap;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.quartz.PersistJobDataAfterExecution;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.List;
import static java.lang.String.format;
/**
* Quartz Job which polls DMaaP MR VES Collector Topic for messages and writes them to
* a given CDAP Stream
*
* @author Rajiv Singla . Creation Date: 10/24/2016.
*/
@DisallowConcurrentExecution
@PersistJobDataAfterExecution
public class TCADMaaPMRSubscriberJob implements Job {
private static final Logger LOG = LoggerFactory.getLogger(TCADMaaPMRSubscriberJob.class);
@Override
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
LOG.debug("Starting DMaaP MR Topic Subscriber fetch Job. Next firing time will be: {}",
jobExecutionContext.getNextFireTime());
// Get Job Data Map
final JobDataMap jobDataMap = jobExecutionContext.getMergedJobDataMap();
// Fetch all Job Params from Job Data Map
final String cdapStreamName = jobDataMap.getString(AnalyticsConstants.CDAP_STREAM_VARIABLE_NAME);
final WorkerContext workerContext =
(WorkerContext) jobDataMap.get(AnalyticsConstants.WORKER_CONTEXT_VARIABLE_NAME);
final DMaaPMRSubscriber subscriber =
(DMaaPMRSubscriber) jobDataMap.get(AnalyticsConstants.DMAAP_SUBSCRIBER_VARIABLE_NAME);
final Metrics metrics = (Metrics) jobDataMap.get(AnalyticsConstants.DMAAP_METRICS_VARIABLE_NAME);
final Optional<List<String>> subscriberMessagesOptional =
DMaaPMRUtils.getSubscriberMessages(subscriber, metrics);
// Write message to CDAP Stream using Stream Writer
if (subscriberMessagesOptional.isPresent()) {
writeMessageToCDAPStream(subscriberMessagesOptional.get(), cdapStreamName, workerContext, metrics);
}
}
/**
* Writes given messages to CDAP Stream
*
* @param actualMessages List of messages that need to written to cdap stream
* @param cdapStreamName cdap stream name
* @param workerContext cdap worker context
* @param metrics cdap metrics
*/
private void writeMessageToCDAPStream(final List<String> actualMessages, final String cdapStreamName,
final WorkerContext workerContext, final Metrics metrics) {
LOG.debug("Writing message to CDAP Stream: {}, Message Count: {}", cdapStreamName, actualMessages.size());
try {
for (String message : actualMessages) {
workerContext.write(cdapStreamName, message);
}
} catch (IOException e) {
metrics.count(CDAPMetricsConstants.TCA_SUBSCRIBER_FAILURE_TO_WRITE_TO_STREAM_METRIC, 1);
final String errorMessage =
format("Error while DMaaP message router subscriber attempting to write to CDAP Stream: %s, " +
"Exception: %s", cdapStreamName, e);
throw new DCAEAnalyticsRuntimeException(errorMessage, LOG, e);
}
LOG.debug("DMaaP MR Subscriber successfully finished writing messages to CDAP Stream: {}, Message count: {}",
cdapStreamName, actualMessages.size());
}
}
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