--- /dev/null
+/**
+ * ============LICENSE_START=======================================================
+ * DataRouter
+ * ================================================================================
+ * Copyright © 2017 AT&T Intellectual Property.
+ * Copyright © 2017 Amdocs
+ * All rights reserved.
+ * ================================================================================
+ * 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 ati
+ *
+ * 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=========================================================
+ *
+ * ECOMP and OpenECOMP are trademarks
+ * and service marks of AT&T Intellectual Property.
+ */
+package org.openecomp.event;
+
+import com.att.nsa.cambria.client.CambriaClientBuilders;
+import com.att.nsa.cambria.client.CambriaClientBuilders.ConsumerBuilder;
+import com.att.nsa.cambria.client.CambriaConsumer;
+
+import org.apache.camel.Exchange;
+import org.apache.camel.Message;
+import org.apache.camel.Processor;
+import org.apache.camel.impl.ScheduledPollConsumer;
+import org.openecomp.cl.api.Logger;
+import org.openecomp.cl.eelf.LoggerFactory;
+import org.openecomp.cl.mdc.MdcContext;
+import org.openecomp.logging.RouterCoreMsgs;
+
+import java.net.MalformedURLException;
+import java.security.GeneralSecurityException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.ScheduledThreadPoolExecutor;
+
+/**
+ * The consumer component which is used to pull messages off of the event bus and send them to the
+ * next processor in the route chain. This type of consumer is based off of a scheduled poller so
+ * that events are pulled on a regular basis.
+ */
+public class EventBusConsumer extends ScheduledPollConsumer {
+
+ private Logger logger = LoggerFactory.getInstance().getLogger(EventBusConsumer.class);
+ private Logger auditLogger = LoggerFactory.getInstance().getAuditLogger(EventBusConsumer.class);
+ private final EventBusEndpoint endpoint;
+
+ private CambriaConsumer consumer;
+
+ /**
+ * EventBusConsumer Constructor.
+ */
+ public EventBusConsumer(EventBusEndpoint endpoint, Processor processor) {
+ super(endpoint, processor);
+ super.setDelay(endpoint.getPollingDelay());
+ this.endpoint = endpoint;
+
+ setScheduledExecutorService(new ScheduledThreadPoolExecutor(endpoint.getPoolSize()));
+
+ String[] urls = endpoint.getUrl().split(",");
+
+ List<String> urlList = null;
+
+ if (urls != null) {
+ urlList = Arrays.asList(urls);
+ }
+
+ try {
+
+ ConsumerBuilder consumerBuilder = new CambriaClientBuilders.ConsumerBuilder()
+ .usingHosts(urlList).onTopic(endpoint.getEventTopic())
+ .knownAs(endpoint.getGroupName(), endpoint.getGroupId());
+
+ String apiKey = endpoint.getApiKey();
+ String apiSecret = endpoint.getApiSecret();
+
+ if (apiKey != null && apiSecret != null) {
+ consumerBuilder.authenticatedBy(endpoint.getApiKey(), endpoint.getApiSecret());
+ }
+
+ consumer = consumerBuilder.build();
+
+ } catch (MalformedURLException | GeneralSecurityException e) {
+ logger.error(RouterCoreMsgs.EVENT_CONSUMER_CREATION_EXCEPTION, e.getLocalizedMessage());
+ }
+ }
+
+ /**
+ * Method which is called by the Camel process on a scheduled basis. This specific implementation
+ * reads messages off of the configured topic and schedules tasks to process them .
+ *
+ * @return the number of messages that were processed off the event queue
+ */
+ @Override
+ protected int poll() throws Exception {
+
+ logger.debug("Checking for event on topic: " + endpoint.getEventTopic());
+
+ int processCount = 0;
+
+ Iterable<String> messages = null;
+
+ messages = consumer.fetch();
+
+ String topic = endpoint.getEventTopic();
+
+ for (String message : messages) {
+ Exchange exchange = endpoint.createExchange();
+ exchange.getIn().setBody(message);
+ getScheduledExecutorService().submit(new EventProcessor(exchange, topic));
+ ++processCount;
+ }
+ return processCount;
+ }
+
+ protected void doStop() throws Exception {
+ super.doStop();
+ if (consumer != null) {
+ consumer.close();
+ }
+ }
+
+ protected void doShutdown() throws Exception {
+ super.doShutdown();
+ if (consumer != null) {
+ consumer.close();
+ }
+ }
+
+ /**
+ * Class responsible for processing messages pulled off of the event bus.
+ */
+ private class EventProcessor implements Runnable {
+
+ private Exchange message;
+
+ private String topic;
+
+ EventProcessor(Exchange message, String topic) {
+ this.message = message;
+ this.topic = topic;
+ }
+
+ public void run() {
+ try {
+
+ MdcContext.initialize(UUID.randomUUID().toString(), "DataRouter", "", "Event-Bus", "");
+
+ // Sends the message to the next processor in the defined Camel route
+ getProcessor().process(message);
+
+ Message response = message.getOut();
+ if (response != null) {
+ logger.debug("Routing response: " + response.getBody());
+ }
+
+ } catch (Exception e) {
+ logger.error(RouterCoreMsgs.EVENT_PROCESSING_EXCEPTION, e.getLocalizedMessage());
+ } finally {
+ // log exception if an exception occurred and was not handled
+ if (message.getException() != null) {
+ logger.info(RouterCoreMsgs.PROCESS_EVENT, topic, "FAILURE");
+ auditLogger.info(RouterCoreMsgs.PROCESS_EVENT, topic, "FAILURE");
+ } else {
+ logger.info(RouterCoreMsgs.PROCESS_EVENT, topic, "SUCCESS");
+ auditLogger.info(RouterCoreMsgs.PROCESS_EVENT, topic, "SUCCESS");
+ }
+ }
+ }
+ }
+}
Code Review / aai / router-core.git / blobdiff