-/*-
- * ========================LICENSE_START=================================
- * O-RAN-SC
- * %%
- * Copyright (C) 2019 Nordix Foundation
- * %%
- * 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.oransc.policyagent.dmaap;
-
-import com.google.common.collect.Iterables;
-
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.time.Duration;
-import java.util.Properties;
-import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.TimeUnit;
-
-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 DmaapMessageConsumerImpl implements Runnable {
-
- private static final Logger logger = LoggerFactory.getLogger(DmaapMessageConsumerImpl.class);
-
- final Duration ERROR_TIMEOUT = Duration.ofSeconds(30);
- final Duration TIME_BETWEEN_DMAAP_POLLS = Duration.ofSeconds(10);
- private final ApplicationConfig applicationConfig;
-
- @Value("${server.port}")
- private int localServerPort;
-
- @Autowired
- public DmaapMessageConsumerImpl(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.error("{}: cannot fetch because of ", this, e.getMessage(), e);
- sleep(ERROR_TIMEOUT);
- }
- }
- }
-
- private Iterable<String> fetchAllMessages() throws ServiceException, FileNotFoundException, 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 Exception {
- logger.debug("Message Reveived from DMAAP : {}", msg);
- createDmaapMessageHandler().handleDmaapMsg(msg);
- }
-
- private DmaapMessageHandler createDmaapMessageHandler() throws FileNotFoundException, 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, this.applicationConfig, agentClient);
- }
-
- private boolean sleep(Duration duration) {
- CountDownLatch sleep = new CountDownLatch(1);
- try {
- sleep.await(duration.toMillis(), TimeUnit.MILLISECONDS);
- return true;
- } catch (Exception e) {
- logger.error("msg", e);
- return false;
- }
- }
-}