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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright (c) 2018-2019 AT&T Intellectual Property. All rights reserved.
* Copyright (c) 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.publisher;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.inject.Inject;
import org.onap.aai.event.client.DMaaPEventPublisher;
import org.onap.aai.validation.config.TopicAdminConfig;
import org.onap.aai.validation.config.TopicConfig;
import org.onap.aai.validation.config.TopicConfig.Topic;
import org.onap.aai.validation.exception.ValidationServiceError;
import org.onap.aai.validation.exception.ValidationServiceException;
import org.onap.aai.validation.factory.DMaaPEventPublisherFactory;
import org.onap.aai.validation.logging.ApplicationMsgs;
import org.onap.aai.validation.logging.LogHelper;
/**
* Event Publisher
*
*/
public class ValidationEventPublisher implements MessagePublisher {
private static LogHelper applicationLogger = LogHelper.INSTANCE;
private List<Topic> publisherTopics;
private boolean enablePublishing;
private long retries;
private long retriesRemaining;
private DMaaPEventPublisherFactory dMaapFactory;
/**
* Instantiates an Event Publisher instance using properties from config file.
*
* @param topicConfig
* @param topicAdminConfig
*/
@Inject
public ValidationEventPublisher(TopicConfig topicConfig, TopicAdminConfig topicAdminConfig) {
enablePublishing = topicAdminConfig.isPublishEnable();
if (enablePublishing) {
publisherTopics = topicConfig.getPublisherTopics();
retries = topicAdminConfig.getPublishRetries();
}
dMaapFactory = new DMaaPEventPublisherFactory();
}
/**
* Connect to the event publisher, add the message, and then publish it by closing the publisher.
*/
@Override
public void publishMessage(String message) throws ValidationServiceException {
Collection<String> messages = new ArrayList<>();
messages.add(message);
publishMessages(messages);
}
/**
* Connect to the event publisher, adds the messages, and then publish them by closing the publisher.
*/
@Override
public void publishMessages(Collection<String> messages) throws ValidationServiceException {
if (enablePublishing) {
applicationLogger.debug("Publishing messages: " + messages);
for (Topic topic : publisherTopics) {
retriesRemaining = retries;
publishMessages(messages, topic);
}
}
}
private void publishMessages(Collection<String> messages, Topic topic) throws ValidationServiceException {
DMaaPEventPublisher dMaapEventPublisher = dMaapFactory.createEventPublisher(topic.getHost(), topic.getName(),
topic.getUsername(), topic.getPassword(), topic.getTransportType(), topic.getProtocol());
try {
// Add our message to the publisher's queue/bus
int result = dMaapEventPublisher.sendSync(topic.getPartition(), messages);
if (result != messages.size()) {
applicationLogger.warn(ApplicationMsgs.UNSENT_MESSAGE_WARN);
closeEventPublisher(dMaapEventPublisher);
retryOrThrow(messages, topic, new ValidationServiceException(
ValidationServiceError.EVENT_CLIENT_INCORRECT_NUMBER_OF_MESSAGES_SENT, result));
}
} catch (Exception e) {
applicationLogger.error(ApplicationMsgs.UNSENT_MESSAGE_ERROR);
closeEventPublisher(dMaapEventPublisher);
retryOrThrow(messages, topic,
new ValidationServiceException(ValidationServiceError.EVENT_CLIENT_SEND_ERROR, e));
}
completeMessageSending(dMaapEventPublisher, topic);
}
/**
* Publish the queued messages by closing the publisher.
*
* @param eventPublisher
* the publisher to close
* @throws AuditException
*/
private void completeMessageSending(DMaaPEventPublisher eventPublisher, Topic topic)
throws ValidationServiceException {
List<String> unsentMsgs = closeEventPublisher(eventPublisher);
if (unsentMsgs != null && !unsentMsgs.isEmpty()) {
// Log the error, as the exception will not be propagated due to the fact that the Cambria Client throws
// an exception first in a separate thread.
applicationLogger.error(ApplicationMsgs.EVENT_CLIENT_CLOSE_UNSENT_MESSAGE,
ValidationServiceError.EVENT_CLIENT_CLOSE_UNSENT_MESSAGE.getMessage(unsentMsgs));
retryOrThrow(unsentMsgs, topic, new ValidationServiceException(
ValidationServiceError.EVENT_CLIENT_CLOSE_UNSENT_MESSAGE, unsentMsgs));
}
}
private void retryOrThrow(Collection<String> messages, Topic topic, ValidationServiceException exceptionToThrow)
throws ValidationServiceException {
if (retriesRemaining <= 0) {
applicationLogger.warn(ApplicationMsgs.SEND_MESSAGE_ABORT_WARN);
throw exceptionToThrow;
} else {
applicationLogger.warn(ApplicationMsgs.SEND_MESSAGE_RETRY_WARN);
retriesRemaining--;
publishMessages(messages, topic);
}
}
private List<String> closeEventPublisher(DMaaPEventPublisher eventPublisher) throws ValidationServiceException {
try {
return eventPublisher.closeWithUnsent();
} catch (Exception e) {
throw new ValidationServiceException(ValidationServiceError.EVENT_CLIENT_CLOSE_ERROR, e);
}
}
public void setEventPublisherFactory(DMaaPEventPublisherFactory dMaapFactory) {
this.dMaapFactory = dMaapFactory;
}
}
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