-/**
- * The Dmaap consumer which has the base methods to be implemented by any class which implements this interface
- *
- */
-public interface DmaapMessageConsumer {
-
- /**
- * The init method creates the MRConsumer with the properties passed from the Application Config
- *
- * @param properties
- */
- public void init();
-
- /**
- * This method process the message and call the respective Controller
- *
- * @param msg
- * @throws Exception
- */
- public abstract void processMsg(String msg) throws Exception;
-
- /**
- * To check whether the DMAAP Listner is alive
- *
- * @return boolean
- */
- public boolean isAlive();
-
- /**
- * To Stop the DMAAP Listener
- */
- public void stopConsumer();
-
- /**
- * It's a infinite loop run every configured seconds to fetch the message from DMAAP. This method can be stop by
- * setting the alive flag to false
- */
- public void run();
+import com.google.common.collect.Iterables;
+
+import java.io.IOException;
+import java.time.Duration;
+import java.util.Properties;
+
+import org.onap.dmaap.mr.client.MRBatchingPublisher;
+import org.onap.dmaap.mr.client.MRClientFactory;
+import org.onap.dmaap.mr.client.MRConsumer;
+import org.onap.dmaap.mr.client.response.MRConsumerResponse;
+import org.oransc.policyagent.clients.AsyncRestClient;
+import org.oransc.policyagent.configuration.ApplicationConfig;
+import org.oransc.policyagent.exceptions.ServiceException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+@Component
+public class DmaapMessageConsumer implements Runnable {
+
+ private static final Logger logger = LoggerFactory.getLogger(DmaapMessageConsumer.class);
+
+ @SuppressWarnings("squid:S00116") // To avoid warning about DMAAP abbreviation.
+ final Duration TIME_BETWEEN_DMAAP_POLLS = Duration.ofSeconds(10);
+
+ private final ApplicationConfig applicationConfig;
+
+ @Value("${server.port}")
+ private int localServerPort;
+
+ @Autowired
+ public DmaapMessageConsumer(ApplicationConfig applicationConfig) {
+ this.applicationConfig = applicationConfig;
+
+ Thread thread = new Thread(this);
+ thread.start();
+ }
+
+ private boolean isDmaapConfigured() {
+ Properties consumerCfg = applicationConfig.getDmaapConsumerConfig();
+ Properties producerCfg = applicationConfig.getDmaapPublisherConfig();
+ return (consumerCfg != null && consumerCfg.size() > 0 && producerCfg != null && producerCfg.size() > 0);
+ }
+
+ @Override
+ public void run() {
+ while (sleep(TIME_BETWEEN_DMAAP_POLLS) && isDmaapConfigured()) {
+ try {
+ Iterable<String> dmaapMsgs = fetchAllMessages();
+ if (dmaapMsgs != null && Iterables.size(dmaapMsgs) > 0) {
+ logger.debug("Fetched all the messages from DMAAP and will start to process the messages");
+ for (String msg : dmaapMsgs) {
+ processMsg(msg);
+ }
+ }
+ } catch (Exception e) {
+ logger.warn("{}: cannot fetch because of ", this, e.getMessage(), e);
+ sleep(TIME_BETWEEN_DMAAP_POLLS);
+ }
+ }
+ }
+
+ private Iterable<String> fetchAllMessages() throws ServiceException, IOException {
+ Properties dmaapConsumerProperties = this.applicationConfig.getDmaapConsumerConfig();
+ MRConsumer consumer = MRClientFactory.createConsumer(dmaapConsumerProperties);
+ MRConsumerResponse response = consumer.fetchWithReturnConsumerResponse();
+ if (response == null || !"200".equals(response.getResponseCode())) {
+ throw new ServiceException("DMaaP NULL response received");
+ } else {
+ logger.debug("DMaaP consumer received {} : {}", response.getResponseCode(), response.getResponseMessage());
+ return response.getActualMessages();
+ }
+ }
+
+ private void processMsg(String msg) throws IOException {
+ logger.debug("Message Reveived from DMAAP : {}", msg);
+ createDmaapMessageHandler().handleDmaapMsg(msg);
+ }
+
+ private DmaapMessageHandler createDmaapMessageHandler() throws IOException {
+ String agentBaseUrl = "http://localhost:" + this.localServerPort;
+ AsyncRestClient agentClient = new AsyncRestClient(agentBaseUrl);
+ Properties dmaapPublisherProperties = applicationConfig.getDmaapPublisherConfig();
+ MRBatchingPublisher producer = MRClientFactory.createBatchingPublisher(dmaapPublisherProperties);
+
+ return new DmaapMessageHandler(producer, agentClient);
+ }