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/*
* ============LICENSE_START=======================================================
* ONAP : DCAE
* ================================================================================
* Copyright 2018 TechMahindra
*=================================================================================
* 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.universalvesadapter.service;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import org.onap.universalvesadapter.adapter.UniversalEventAdapter;
import org.onap.universalvesadapter.dmaap.Creator;
import org.onap.universalvesadapter.dmaap.MRPublisher.DMaaPMRPublisher;
import org.onap.universalvesadapter.dmaap.MRSubcriber.DMaaPMRSubscriber;
import org.onap.universalvesadapter.exception.DMaapException;
import org.onap.universalvesadapter.exception.MapperConfigException;
import org.onap.universalvesadapter.exception.VesException;
import org.onap.universalvesadapter.utils.CollectorConfigPropertyRetrival;
import org.onap.universalvesadapter.utils.DmaapConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
* Service that starts the universal ves adapter module to listen for events
*
* @author kmalbari
*
*/
@Component
public class VesService {
private static final Logger metricsLogger = LoggerFactory.getLogger("metricsLogger");
private static final Logger debugLogger = LoggerFactory.getLogger("debugLogger");
private static final Logger errorLogger = LoggerFactory.getLogger("errorLogger");
private boolean isRunning = true;
@Autowired
private Creator creator;
@Autowired
private UniversalEventAdapter eventAdapter;
@Autowired
private DmaapConfig dmaapConfig;
private static List<String> list = new LinkedList<String>();
/**
* method triggers universal VES adapter module.
*/
public void start() throws MapperConfigException {
debugLogger.info("Creating Subcriber and Publisher with creator.............");
DMaaPMRPublisher publisher = creator.getDMaaPMRPublisher();
String topicArray[]= CollectorConfigPropertyRetrival.getProperyArray("subscriberTopic");
ExecutorService executorService=Executors.newFixedThreadPool(topicArray.length);
for(int i=0;i<topicArray.length;i++) {
String topicName =topicArray[i];
DMaaPMRSubscriber subcriber = creator.getDMaaPMRSubscriber(topicArray[i]);
executorService.submit(new Runnable() {
@Override
public void run(){
Thread.currentThread().setName(topicName);
metricsLogger.info("fetch and publish from and to Dmaap started:"+Thread.currentThread().getName());
int pollingInternalInt=dmaapConfig.getPollingInterval();
debugLogger.info("The Polling Interval in Milli Second is :{}" +pollingInternalInt);
debugLogger.info("starting subscriber & publisher thread:{}", Thread.currentThread().getName());
while (true) {
synchronized (this) {
for (String incomingJsonString : subcriber.fetchMessages().getFetchedMessages()) {
list.add(incomingJsonString);
}
if (list.isEmpty()) {
try {
Thread.sleep(pollingInternalInt);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
debugLogger.debug("number of messages to be converted :{}", list.size());
if (!list.isEmpty()) {
String val = ((LinkedList<String>) list).removeFirst();
List<String> messages = new ArrayList<>();
String vesEvent = processReceivedJson(val);
if (vesEvent!=null && (!(vesEvent.isEmpty() || vesEvent.equals("")))) {
messages.add(vesEvent);
publisher.publish(messages);
metricsLogger.info("Message successfully published to DMaaP Topic");
}
}
}
}
}
});
}
}
/**
* method stops universal ves adapter module
*/
public void stop() {
isRunning = false;
}
private String processReceivedJson(String incomingJsonString) {
String outgoingJsonString = null;
if (!"".equals(incomingJsonString)) {
try {
outgoingJsonString = eventAdapter.transform(incomingJsonString);
} catch (VesException exception) {
errorLogger.error("Received exception : {},{}" + exception.getMessage(), exception);
debugLogger.warn("APPLICATION WILL BE SHUTDOWN UNTIL ABOVE ISSUE IS RESOLVED.");
} catch (DMaapException e) {
errorLogger.error("Received exception : {}", e.getMessage());
}
}
return outgoingJsonString;
}
}
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