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.FileNotFoundException;
26 import java.io.IOException;
27 import java.time.Duration;
28 import java.util.Properties;
30 import org.onap.dmaap.mr.client.MRBatchingPublisher;
31 import org.onap.dmaap.mr.client.MRClientFactory;
32 import org.onap.dmaap.mr.client.MRConsumer;
33 import org.onap.dmaap.mr.client.response.MRConsumerResponse;
34 import org.oransc.policyagent.clients.AsyncRestClient;
35 import org.oransc.policyagent.configuration.ApplicationConfig;
36 import org.oransc.policyagent.exceptions.ServiceException;
37 import org.slf4j.Logger;
38 import org.slf4j.LoggerFactory;
39 import org.springframework.beans.factory.annotation.Autowired;
40 import org.springframework.beans.factory.annotation.Value;
41 import org.springframework.stereotype.Component;
44 * The class fetched incoming requests from DMAAP on regular intervals. Each
45 * received request is proceesed by DmaapMessageHandler.
48 public class DmaapMessageConsumer implements Runnable {
50 private static final Logger logger = LoggerFactory.getLogger(DmaapMessageConsumer.class);
52 private final static Duration TIME_BETWEEN_DMAAP_POLLS = Duration.ofSeconds(10);
54 private final ApplicationConfig applicationConfig;
56 @Value("${server.port}")
57 private int localServerPort;
60 public DmaapMessageConsumer(ApplicationConfig applicationConfig) {
61 this.applicationConfig = applicationConfig;
63 Thread thread = new Thread(this);
67 DmaapMessageConsumer(ApplicationConfig applicationConfig, boolean start) {
68 this.applicationConfig = applicationConfig;
71 private boolean isDmaapConfigured() {
72 Properties consumerCfg = applicationConfig.getDmaapConsumerConfig();
73 Properties producerCfg = applicationConfig.getDmaapPublisherConfig();
74 return (consumerCfg != null && consumerCfg.size() > 0 && producerCfg != null && producerCfg.size() > 0);
79 while (sleep(TIME_BETWEEN_DMAAP_POLLS) && isDmaapConfigured()) {
81 Iterable<String> dmaapMsgs = fetchAllMessages();
82 if (dmaapMsgs != null && Iterables.size(dmaapMsgs) > 0) {
83 logger.debug("Fetched all the messages from DMAAP and will start to process the messages");
84 for (String msg : dmaapMsgs) {
88 } catch (Exception e) {
89 logger.warn("{}: cannot fetch because of {}", this, e.getMessage());
90 sleep(TIME_BETWEEN_DMAAP_POLLS);
95 private Iterable<String> fetchAllMessages() throws ServiceException, IOException {
96 Properties dmaapConsumerProperties = this.applicationConfig.getDmaapConsumerConfig();
97 MRConsumer consumer = getMessageRouterConsumer(dmaapConsumerProperties);
98 MRConsumerResponse response = consumer.fetchWithReturnConsumerResponse();
99 if (response == null || !"200".equals(response.getResponseCode())) {
100 String errorMessage = "DMaaP NULL response received";
101 if (response != null) {
102 errorMessage = "Error respons " + response.getResponseCode() + " " + response.getResponseMessage()
105 throw new ServiceException(errorMessage);
107 logger.debug("DMaaP consumer received {} : {}", response.getResponseCode(), response.getResponseMessage());
108 return response.getActualMessages();
112 private void processMsg(String msg) throws IOException {
113 logger.debug("Message Reveived from DMAAP : {}", msg);
114 getDmaapMessageHandler().handleDmaapMsg(msg);
117 private DmaapMessageHandler getDmaapMessageHandler() throws IOException {
118 String agentBaseUrl = "http://localhost:" + this.localServerPort;
119 AsyncRestClient agentClient = createRestClient(agentBaseUrl);
120 Properties dmaapPublisherProperties = applicationConfig.getDmaapPublisherConfig();
121 MRBatchingPublisher producer = getMessageRouterPublisher(dmaapPublisherProperties);
123 return createDmaapMessageHandler(agentClient, producer);
126 boolean sleep(Duration duration) {
128 Thread.sleep(duration.toMillis());
130 } catch (Exception e) {
131 logger.error("Failed to put the thread to sleep", e);
136 MRConsumer getMessageRouterConsumer(Properties dmaapConsumerProperties) throws FileNotFoundException, IOException {
137 return MRClientFactory.createConsumer(dmaapConsumerProperties);
140 DmaapMessageHandler createDmaapMessageHandler(AsyncRestClient agentClient, MRBatchingPublisher producer) {
141 return new DmaapMessageHandler(producer, agentClient);
144 AsyncRestClient createRestClient(String agentBaseUrl) {
145 return new AsyncRestClient(agentBaseUrl);
148 MRBatchingPublisher getMessageRouterPublisher(Properties dmaapPublisherProperties)
149 throws FileNotFoundException, IOException {
150 return MRClientFactory.createBatchingPublisher(dmaapPublisherProperties);