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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.plugins.streaming.dmaap;
import co.cask.cdap.api.data.format.StructuredRecord;
import com.fasterxml.jackson.core.type.TypeReference;
import org.apache.spark.storage.StorageLevel;
import org.apache.spark.streaming.receiver.Receiver;
import org.openecomp.dcae.apod.analytics.cdap.plugins.domain.config.dmaap.DMaaPMRSourcePluginConfig;
import org.openecomp.dcae.apod.analytics.cdap.plugins.utils.CDAPPluginUtils;
import org.openecomp.dcae.apod.analytics.cdap.plugins.utils.DMaaPSourceConfigMapper;
import org.openecomp.dcae.apod.analytics.common.exception.DCAEAnalyticsRuntimeException;
import org.openecomp.dcae.apod.analytics.dmaap.DMaaPMRFactory;
import org.openecomp.dcae.apod.analytics.dmaap.service.subscriber.DMaaPMRSubscriber;
import org.openecomp.dcae.apod.analytics.model.domain.cef.EventListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.concurrent.TimeUnit;
import static org.openecomp.dcae.apod.analytics.model.util.AnalyticsModelJsonUtils.readValue;
import static org.openecomp.dcae.apod.analytics.model.util.AnalyticsModelJsonUtils.writeValueAsString;
/**
* DMaaP MR Receiver which calls DMaaP MR Topic and stores structured records
* <p>
* @author Rajiv Singla . Creation Date: 1/19/2017.
*/
public class MockDMaaPMRReceiver extends Receiver<StructuredRecord> {
private static final Logger LOG = LoggerFactory.getLogger(MockDMaaPMRReceiver.class);
private static final long serialVersionUID = 1L;
private static final String MOCK_MESSAGE_FILE_LOCATION = "ves_mock_messages.json";
private static final TypeReference<List<EventListener>> EVENT_LISTENER_TYPE_REFERENCE =
new TypeReference<List<EventListener>>() {
};
private final DMaaPMRSourcePluginConfig pluginConfig;
public MockDMaaPMRReceiver(final StorageLevel storageLevel, final DMaaPMRSourcePluginConfig pluginConfig) {
super(storageLevel);
this.pluginConfig = pluginConfig;
LOG.debug("Created DMaaP MR Receiver instance with plugin Config: {}", pluginConfig);
}
@Override
public void onStart() {
// create DMaaP MR Subscriber
final DMaaPMRSubscriber subscriber =
DMaaPMRFactory.create().createSubscriber(DMaaPSourceConfigMapper.map(pluginConfig));
storeStructuredRecords(subscriber);
}
@Override
public void onStop() {
LOG.debug("Stopping DMaaP MR Receiver with plugin config: {}", pluginConfig);
}
/**
* Fetches records from DMaaP MR Subscriber and store them as structured records
*
* @param subscriber DMaaP MR Subscriber Instance
*/
public void storeStructuredRecords(final DMaaPMRSubscriber subscriber) {
LOG.debug("DMaaP MR Receiver start fetching messages from DMaaP MR Topic");
try (InputStream resourceAsStream =
Thread.currentThread().getContextClassLoader().getResourceAsStream(MOCK_MESSAGE_FILE_LOCATION)) {
if (resourceAsStream == null) {
LOG.error("Unable to find file at location: {}", MOCK_MESSAGE_FILE_LOCATION);
throw new DCAEAnalyticsRuntimeException("Unable to find file", LOG, new FileNotFoundException());
}
List<EventListener> eventListeners = readValue(resourceAsStream, EVENT_LISTENER_TYPE_REFERENCE);
final int totalMessageCount = eventListeners.size();
LOG.debug("Mock message count to be written to cdap stream: ()", totalMessageCount);
int i = 1;
for (EventListener eventListener : eventListeners) {
if (isStopped()) {
return;
}
final String eventListenerString = writeValueAsString(eventListener);
LOG.debug("=======>> Writing message to cdap stream no: {} of {}", i, totalMessageCount);
store(CDAPPluginUtils.createDMaaPMRResponseStructuredRecord(eventListenerString));
i++;
try {
TimeUnit.MILLISECONDS.sleep(pluginConfig.getPollingInterval());
} catch (InterruptedException e) {
LOG.error("Error while sleeping");
throw new DCAEAnalyticsRuntimeException("Error while sleeping", LOG, e);
}
}
LOG.debug("Finished writing mock messages to CDAP Stream");
} catch (IOException e) {
LOG.error("Error while parsing json file");
throw new DCAEAnalyticsRuntimeException("Error while parsing mock json file", LOG, e);
}
}
}
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