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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2018-2019 AT&T Intellectual Property. All rights reserved.
* Copyright © 2018-2019 European Software Marketing Ltd.
* ================================================================================
* 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.onap.aai.validation.services;
import com.google.common.collect.Iterables;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import javax.inject.Inject;
import org.onap.aai.event.client.DMaaPEventConsumer;
import org.onap.aai.validation.config.TopicConfig;
import org.onap.aai.validation.config.TopicConfig.Topic;
import org.onap.aai.validation.controller.ValidationController;
import org.onap.aai.validation.exception.ValidationServiceError;
import org.onap.aai.validation.exception.ValidationServiceException;
import org.onap.aai.validation.factory.DMaaPEventConsumerFactory;
import org.onap.aai.validation.logging.ApplicationMsgs;
import org.onap.aai.validation.logging.LogHelper;
import org.onap.aai.validation.logging.LogHelper.MdcParameter;
import org.springframework.stereotype.Service;
/**
* Event Polling Service
*
*/
@Service
public class EventPollingService implements Runnable {
private static final LogHelper applicationLogger = LogHelper.INSTANCE;
private List<DMaaPEventConsumer> consumers;
private ValidationController validationController;
/**
* Instantiates an EventPollingService instance using the supplied configuration.
*
* @param topicConfig
* @throws ValidationServiceException
*/
@Inject
public EventPollingService(TopicConfig topicConfig) throws ValidationServiceException {
consumers = new ArrayList<>();
DMaaPEventConsumerFactory factory = new DMaaPEventConsumerFactory();
for (Topic topic : topicConfig.getConsumerTopics()) {
try {
consumers.add(factory.createEventConsumer(topic.getHost(), topic.getName(), topic.getUsername(),
topic.getPassword(), topic.getConsumerGroup(), topic.getConsumerId(), topic.getTransportType(),
topic.getProtocol()));
} catch (MalformedURLException e) {
throw new ValidationServiceException(ValidationServiceError.EVENT_CLIENT_CONSUMER_INIT_ERROR, e);
}
}
}
@Override
public void run() {
applicationLogger.info(ApplicationMsgs.POLL_EVENTS);
try {
for (DMaaPEventConsumer consumer : consumers) {
for (String event : consumeEvents(consumer)) {
// The event does not have a transaction ID so create one for logging purposes
applicationLogger.setContextValue(MdcParameter.REQUEST_ID, UUID.randomUUID().toString());
validationController.execute(event, "topic");
}
}
} catch (Exception e) {
// This could be a temporary issue, so the exception is swallowed
applicationLogger.error(ApplicationMsgs.INVOKE_EVENT_CONSUMER_ERROR, e);
} catch (Throwable t) { // NOSONAR
// E.g. We may catch an IllegalArgumentException caused by invalid configuration
applicationLogger.error(ApplicationMsgs.INVOKE_EVENT_CONSUMER_ERROR, t);
// Add these details to the status report available via the controller
validationController.recordThrowable(t);
// For non IO exceptions, rethrow in order to cause the executor to stop scheduling
throw t;
} finally {
applicationLogger.clearContextValue(MdcParameter.REQUEST_ID);
}
}
/* Getters and Setters for Spring injection */
public ValidationController getValidationController() {
return validationController;
}
public void setValidationController(ValidationController validationController) throws ValidationServiceException {
this.validationController = validationController;
// Instruct the validation controller to load and validate its configuration
this.validationController.initialise();
}
private Iterable<String> consumeEvents(DMaaPEventConsumer consumer) throws Exception {
applicationLogger.clearContextValue(MdcParameter.REQUEST_ID);
applicationLogger.debug("Querying consumer " + consumer);
Iterable<String> events = consumer.consume();
applicationLogger.info(ApplicationMsgs.NUMBER_OF_MESSAGES_CONSUMED, Integer.toString(Iterables.size(events)));
return events;
}
}
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