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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.analytics.tca.worker;
import co.cask.cdap.api.metrics.Metrics;
import co.cask.cdap.api.worker.WorkerContext;
import com.google.common.base.Optional;
import com.google.common.base.Stopwatch;
import org.openecomp.dcae.analytics.common.AnalyticsConstants;
import org.openecomp.dcae.analytics.common.CDAPMetricsConstants;
import org.openecomp.dcae.analytics.common.exception.DCAEAnalyticsRuntimeException;
import org.openecomp.dcae.analytics.common.utils.HTTPUtils;
import org.openecomp.dcae.analytics.dmaap.domain.response.DMaaPMRSubscriberResponse;
import org.openecomp.dcae.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<DMaaPMRSubscriberResponse> subscriberResponseOptional =
getSubscriberResponse(subscriber, metrics);
// If response is not present, unable to proceed
if (!subscriberResponseOptional.isPresent()) {
return;
}
final DMaaPMRSubscriberResponse subscriberResponse = subscriberResponseOptional.get();
// If response code return by the subscriber call is not successful, unable to do proceed
if (!HTTPUtils.isSuccessfulResponseCode(subscriberResponse.getResponseCode())) {
LOG.error("Subscriber was unable to fetch messages properly. Subscriber Response Code: {} " +
"Unable to proceed further....", subscriberResponse.getResponseCode());
metrics.count(CDAPMetricsConstants.TCA_SUBSCRIBER_UNSUCCESSFUL_RESPONSES_METRIC, 1);
return;
}
LOG.debug("Subscriber HTTP Response Status Code match successful: {}", subscriberResponse,
HTTPUtils.HTTP_SUCCESS_STATUS_CODE);
final List<String> actualMessages = subscriberResponse.getFetchedMessages();
// If there are no message returned during from Subscriber, nothing to write to CDAP Stream
if (actualMessages.isEmpty()) {
LOG.debug("Subscriber Response has no messages. Nothing to write to CDAP stream....");
metrics.count(CDAPMetricsConstants.TCA_SUBSCRIBER_RESPONSES_WITH_NO_MESSAGES_METRIC, 1);
return;
}
LOG.debug("DMaaP MR Subscriber found new messages in DMaaP Topic. Message count: {}", actualMessages.size());
metrics.count(CDAPMetricsConstants.TCA_SUBSCRIBER_TOTAL_MESSAGES_PROCESSED_METRIC, actualMessages.size());
// Write message to CDAP Stream using Stream Batch Writer
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());
}
/**
* Get Subscriber response and records time taken to fetch messages. Returns Optional.None if Subscriber response
* is null or response status code is not present
*
* @param subscriber - DMaaP Subscriber
* @param metrics - CDAP Metrics collector
*
* @return - Optional of Subscriber Response
*/
private static Optional<DMaaPMRSubscriberResponse> getSubscriberResponse(final DMaaPMRSubscriber subscriber,
final Metrics metrics) {
// Check how long it took for subscriber to respond
final Stopwatch stopwatch = new Stopwatch();
stopwatch.start();
DMaaPMRSubscriberResponse subscriberResponse = null;
// Fetch messages from DMaaP MR Topic
try {
subscriberResponse = subscriber.fetchMessages();
} catch (DCAEAnalyticsRuntimeException e) {
LOG.error("Error while fetching messages for DMaaP MR Topic: {}", e);
}
stopwatch.stop();
final long subscriberResponseTimeMS = stopwatch.elapsedMillis();
// If response is null is null or response code is null, unable to proceed nothing to do
if (subscriberResponse == null || subscriberResponse.getResponseCode() == null) {
LOG.error("Subscriber Response is null or subscriber Response code is null. Unable to proceed further...");
return Optional.absent();
}
LOG.debug("Subscriber Response:{}, Subscriber HTTP Response Status Code {}, Subscriber Response Time(ms): {}",
subscriberResponse, subscriberResponse.getResponseCode(), subscriberResponseTimeMS);
// Record subscriber response time
metrics.gauge(CDAPMetricsConstants.TCA_SUBSCRIBER_RESPONSE_TIME_MS_METRIC, subscriberResponseTimeMS);
// Record all response count from subscriber
metrics.count(CDAPMetricsConstants.TCA_SUBSCRIBER_ALL_RESPONSES_COUNT_METRIC, 1);
return Optional.of(subscriberResponse);
}
}
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