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/**
* Copyright 2017 ZTE Corporation.
*
* 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.
*/
package org.onap.holmes.engine.dcae;
import lombok.extern.slf4j.Slf4j;
import org.onap.holmes.common.dcae.DcaeConfigurationQuery;
import org.onap.holmes.common.dcae.DcaeConfigurationsCache;
import org.onap.holmes.common.dcae.entity.DcaeConfigurations;
import org.onap.holmes.common.dropwizard.ioc.utils.ServiceLocatorHolder;
import org.onap.holmes.common.exception.CorrelationException;
import org.onap.holmes.common.utils.Md5Util;
import org.onap.holmes.dsa.dmaappolling.Subscriber;
import org.onap.holmes.engine.dmaap.SubscriberAction;
@Slf4j
public class DcaeConfigurationPolling implements Runnable {
private String hostname;
public static final long POLLING_PERIOD = 30 * 1000L;
private String prevConfigMd5 = Md5Util.md5(null);
public DcaeConfigurationPolling(String hostname) {
this.hostname = hostname;
}
@Override
public void run() {
DcaeConfigurations dcaeConfigurations = null;
try {
dcaeConfigurations = DcaeConfigurationQuery.getDcaeConfigurations(hostname);
String md5 = Md5Util.md5(dcaeConfigurations);
if (prevConfigMd5.equals(md5)){
log.info("Operation aborted due to identical Configurations.");
return;
}
prevConfigMd5 = md5;
} catch (CorrelationException e) {
log.error("Failed to poll the DCAE configurations. " + e.getMessage(), e);
} catch (Exception e) {
log.info("Failed to generate the MD5 information for new configurations.", e);
}
if (dcaeConfigurations != null) {
DcaeConfigurationsCache.setDcaeConfigurations(dcaeConfigurations);
addSubscribers(dcaeConfigurations);
}
}
private void addSubscribers(DcaeConfigurations dcaeConfigurations) {
SubscriberAction subscriberAction = ServiceLocatorHolder.getLocator()
.getService(SubscriberAction.class);
for (String key : dcaeConfigurations.getSubKeys()) {
Subscriber subscriber = new Subscriber();
subscriber.setTopic(key);
subscriber.setUrl(dcaeConfigurations.getSubSecInfo(key).getDmaapInfo()
.getTopicUrl());
subscriberAction.addSubscriber(subscriber);
}
}
}
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