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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.annotation.Property;
import co.cask.cdap.api.worker.AbstractWorker;
import co.cask.cdap.api.worker.WorkerContext;
import com.fasterxml.jackson.core.type.TypeReference;
import org.openecomp.dcae.apod.analytics.cdap.tca.settings.TCAAppPreferences;
import org.openecomp.dcae.apod.analytics.cdap.tca.utils.CDAPTCAUtils;
import org.openecomp.dcae.apod.analytics.common.exception.DCAEAnalyticsRuntimeException;
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 static org.openecomp.dcae.apod.analytics.tca.utils.TCAUtils.readValue;
import static org.openecomp.dcae.apod.analytics.tca.utils.TCAUtils.writeValueAsString;
/**
* CDAP Worker which mocks fetching VES Messages from DMaaP MR topic.
* The mock instead of making DMaaP MR calls will actually take messages
* from file and send them to stream at subscriber polling interval
*
* TODO: To be removed before going to production - only for testing purposes
*
* @author Rajiv Singla . Creation Date: 11/4/2016.
*/
public class TCADMaaPMockSubscriberWorker extends AbstractWorker {
private static final Logger LOG = LoggerFactory.getLogger(TCADMaaPMockSubscriberWorker.class);
// TODO: Remove this file before going to production - only for mocking purposes
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 TCAAppPreferences tcaAppPreferences;
private boolean stopSendingMessages;
@Property
private final String tcaSubscriberOutputStreamName;
public TCADMaaPMockSubscriberWorker(final String tcaSubscriberOutputStreamName) {
this.tcaSubscriberOutputStreamName = tcaSubscriberOutputStreamName;
}
@Override
public void configure() {
setName("MockTCASubscriberWorker");
setDescription("Writes Mocked VES messages to CDAP Stream");
LOG.info("Configuring Mock TCA MR DMaaP Subscriber worker with name: {}", "MockTCASubscriberWorker");
}
@Override
public void initialize(WorkerContext context) throws Exception {
super.initialize(context);
final TCAAppPreferences appPreferences = CDAPTCAUtils.getValidatedTCAAppPreferences(context);
LOG.info("Initializing Mock TCA MR DMaaP Subscriber worker with preferences: {}", appPreferences);
this.tcaAppPreferences = appPreferences;
this.stopSendingMessages = false;
}
@Override
public void run() {
final Integer subscriberPollingInterval = tcaAppPreferences.getSubscriberPollingInterval();
LOG.debug("Mock TCA Subscriber Polling interval: {}", subscriberPollingInterval);
final 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());
}
try {
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 (stopSendingMessages) {
LOG.debug("Stop sending messages......");
break;
}
final String eventListenerString = writeValueAsString(eventListener);
LOG.debug("=======>> Writing message to cdap stream no: {} of {}", i, totalMessageCount);
getContext().write(tcaSubscriberOutputStreamName, eventListenerString);
i++;
try {
Thread.sleep(subscriberPollingInterval);
} 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);
}
}
@Override
public void stop() {
stopSendingMessages = true;
}
}
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