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/*******************************************************************************
* ============LICENSE_START=======================================================
* slice-analysis-ms
* ================================================================================
* Copyright (C) 2020-2022 Wipro Limited.
* ==============================================================================
* 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.slice.analysis.ms.service;
import java.util.List;
import java.util.Objects;
import org.onap.slice.analysis.ms.configdb.IConfigDbService;
import org.onap.slice.analysis.ms.cps.CpsInterface;
import org.onap.slice.analysis.ms.models.Configuration;
import org.onap.slice.analysis.ms.models.SubCounter;
import org.onap.slice.analysis.ms.utils.BeanUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This Thread class consumes message from pm data queue and sends onset message to policy
*/
public class ConsumerThread extends Thread {
private static Logger log = LoggerFactory.getLogger(ConsumerThread.class);
private PmDataQueue pmDataQueue;
private IConfigDbService configDbService;
private SnssaiSamplesProcessor snssaiSamplesProcessor;
private CpsInterface cpsInterface;
private long initialDelaySec;
private int samples;
/**
* Default constructor.
*/
public ConsumerThread() {
super();
this.pmDataQueue = BeanUtil.getBean(PmDataQueue.class);
this.configDbService = BeanUtil.getBean(IConfigDbService.class);
this.initialDelaySec = Configuration.getInstance().getInitialDelaySeconds();
this.samples = Configuration.getInstance().getSamples();
this.cpsInterface = BeanUtil.getBean(CpsInterface.class);
}
/**
* Consumes data from PM data queue, process the data and sends onset message to policy if needed
*/
@Override
public void run() {
Boolean isConfigDbEnabled = (Objects.isNull(Configuration.getInstance().getConfigDbEnabled())) ? true
: Configuration.getInstance().getConfigDbEnabled();
boolean done = false;
boolean result = false;
String snssai = "";
List<String> nfs = null;
while (!done) {
try {
Thread.sleep(initialDelaySec);
log.info("Starting Consumer Thread");
snssai = pmDataQueue.getSnnsaiFromQueue();
if (!snssai.equals("")) {
log.info("Consumer thread processing data for s-nssai {}", snssai);
try {
if (isConfigDbEnabled) {
nfs = configDbService.fetchNetworkFunctionsOfSnssai(snssai);
} else {
nfs = cpsInterface.fetchNetworkFunctionsOfSnssai(snssai);
}
} catch (Exception e) {
pmDataQueue.putSnssaiToQueue(snssai);
log.error("Exception caught while fetching nfs of snssai {}, {}", snssai, e.getMessage());
}
if (nfs != null && checkForEnoughSamples(nfs, snssai)) {
this.snssaiSamplesProcessor = BeanUtil.getBean(SnssaiSamplesProcessor.class);
result = snssaiSamplesProcessor.processSamplesOfSnnsai(snssai, nfs);
if (!result) {
log.info("Not enough samples to process for {}", snssai);
pmDataQueue.putSnssaiToQueue(snssai);
}
}
}
} catch (Exception e) {
log.error("Exception in Consumer Thread, {}", e.getMessage());
done = true;
}
}
}
/**
* Checks whether enough samples are available for the network functions
*/
public boolean checkForEnoughSamples(List<String> nfs, String snssai) {
for (String nf : nfs) {
if (!pmDataQueue.checkSamplesInQueue(new SubCounter(nf, snssai), samples)) {
log.info("Not enough samples to process for network function {} of snssai {}", nf, snssai);
pmDataQueue.putSnssaiToQueue(snssai);
return false;
}
}
return true;
}
}
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