2 * ========================LICENSE_START=================================
5 * Copyright (C) 2020 Nordix Foundation
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ========================LICENSE_END===================================
21 package org.oransc.policyagent.dmaap;
23 import com.google.common.collect.Iterables;
25 import java.io.IOException;
26 import java.time.Duration;
27 import java.util.Properties;
29 import org.onap.dmaap.mr.client.MRBatchingPublisher;
30 import org.onap.dmaap.mr.client.MRClientFactory;
31 import org.onap.dmaap.mr.client.MRConsumer;
32 import org.onap.dmaap.mr.client.response.MRConsumerResponse;
33 import org.oransc.policyagent.clients.AsyncRestClient;
34 import org.oransc.policyagent.configuration.ApplicationConfig;
35 import org.oransc.policyagent.exceptions.ServiceException;
36 import org.slf4j.Logger;
37 import org.slf4j.LoggerFactory;
38 import org.springframework.beans.factory.annotation.Autowired;
39 import org.springframework.beans.factory.annotation.Value;
40 import org.springframework.stereotype.Component;
43 * The class fetches incoming requests from DMAAP. It uses the timeout parameter
44 * that lets the MessageRouter keep the connection with the Kafka open until
45 * requests are sent in.
48 * this service will regularly check the configuration and start polling DMaaP
49 * if the configuration is added. If the DMaaP configuration is removed, then
50 * the service will stop polling and resume checking for configuration.
53 * Each received request is processed by {@link DmaapMessageHandler}.
56 public class DmaapMessageConsumer {
58 protected static final Duration TIME_BETWEEN_DMAAP_RETRIES = Duration.ofSeconds(10);
60 private static final Logger logger = LoggerFactory.getLogger(DmaapMessageConsumer.class);
62 private final ApplicationConfig applicationConfig;
64 private DmaapMessageHandler dmaapMessageHandler = null;
65 private MRConsumer messageRouterConsumer = null;
67 @Value("${server.port}")
68 private int localServerPort;
71 public DmaapMessageConsumer(ApplicationConfig applicationConfig) {
72 this.applicationConfig = applicationConfig;
76 * Starts the consumer. If there is a DMaaP configuration, it will start polling
77 * for messages. Otherwise it will check regularly for the configuration.
79 * @return the running thread, for test purposes.
81 public Thread start() {
82 Thread thread = new Thread(this::messageHandlingLoop);
87 private void messageHandlingLoop() {
88 while (!isStopped()) {
90 if (isDmaapConfigured()) {
91 Iterable<String> dmaapMsgs = fetchAllMessages();
92 if (dmaapMsgs != null && Iterables.size(dmaapMsgs) > 0) {
93 logger.debug("Fetched all the messages from DMAAP and will start to process the messages");
94 for (String msg : dmaapMsgs) {
99 sleep(TIME_BETWEEN_DMAAP_RETRIES); // wait for configuration
101 } catch (Exception e) {
102 logger.warn("Cannot fetch because of {}", e.getMessage());
103 sleep(TIME_BETWEEN_DMAAP_RETRIES);
108 protected boolean isStopped() {
112 protected boolean isDmaapConfigured() {
113 Properties consumerCfg = applicationConfig.getDmaapConsumerConfig();
114 Properties producerCfg = applicationConfig.getDmaapPublisherConfig();
115 return (consumerCfg != null && consumerCfg.size() > 0 && producerCfg != null && producerCfg.size() > 0);
118 protected Iterable<String> fetchAllMessages() throws ServiceException, IOException {
119 Properties dmaapConsumerProperties = this.applicationConfig.getDmaapConsumerConfig();
120 MRConsumer consumer = getMessageRouterConsumer(dmaapConsumerProperties);
121 MRConsumerResponse response = consumer.fetchWithReturnConsumerResponse();
122 if (response == null || !"200".equals(response.getResponseCode())) {
123 String errorMessage = "DMaaP NULL response received";
124 if (response != null) {
125 errorMessage = "Error respons " + response.getResponseCode() + " " + response.getResponseMessage()
128 throw new ServiceException(errorMessage);
130 logger.debug("DMaaP consumer received {} : {}", response.getResponseCode(), response.getResponseMessage());
131 return response.getActualMessages();
135 private void processMsg(String msg) throws IOException {
136 logger.debug("Message Reveived from DMAAP : {}", msg);
137 getDmaapMessageHandler().handleDmaapMsg(msg);
140 protected DmaapMessageHandler getDmaapMessageHandler() throws IOException {
141 if (this.dmaapMessageHandler == null) {
142 String agentBaseUrl = "https://localhost:" + this.localServerPort;
143 AsyncRestClient agentClient = new AsyncRestClient(agentBaseUrl);
144 Properties dmaapPublisherProperties = applicationConfig.getDmaapPublisherConfig();
145 MRBatchingPublisher producer = MRClientFactory.createBatchingPublisher(dmaapPublisherProperties);
146 this.dmaapMessageHandler = new DmaapMessageHandler(producer, agentClient);
148 return this.dmaapMessageHandler;
151 protected void sleep(Duration duration) {
153 Thread.sleep(duration.toMillis());
154 } catch (Exception e) {
155 logger.error("Failed to put the thread to sleep", e);
159 protected MRConsumer getMessageRouterConsumer(Properties dmaapConsumerProperties) throws IOException {
160 if (this.messageRouterConsumer == null) {
161 this.messageRouterConsumer = MRClientFactory.createConsumer(dmaapConsumerProperties);
163 return this.messageRouterConsumer;