bpmn/so-bpmn-infrastructure-common/src/main/java/org/onap/so/bpmn/infrastructure/pnf/dmaap/PnfEventReadyDmaapClient.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP - SO
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Copyright (C) 2018 Nokia.
   8  * ================================================================================
   9  * Licensed under the Apache License, Version 2.0 (the "License");
  10  * you may not use this file except in compliance with the License.
  11  * You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  * ============LICENSE_END=========================================================
  21  */
  22
  23 package org.onap.so.bpmn.infrastructure.pnf.dmaap;
  24
  25 import java.io.IOException;
  26 import java.nio.charset.StandardCharsets;
  27 import java.util.*;
  28 import java.util.concurrent.ConcurrentHashMap;
  29 import java.util.concurrent.ScheduledThreadPoolExecutor;
  30 import java.util.concurrent.TimeUnit;
  31 import javax.ws.rs.core.UriBuilder;
  32 import org.apache.http.HttpResponse;
  33 import org.apache.http.HttpStatus;
  34 import org.apache.http.client.HttpClient;
  35 import org.apache.http.client.methods.HttpGet;
  36 import org.apache.http.impl.client.HttpClientBuilder;
  37 import org.apache.http.util.EntityUtils;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40 import org.springframework.beans.factory.annotation.Autowired;
  41 import org.springframework.core.env.Environment;
  42 import org.springframework.stereotype.Component;
  43 import org.onap.so.client.aai.entities.uri.AAIResourceUri;
  44 import org.onap.so.client.aai.entities.uri.AAIUriFactory;
  45 import org.onap.so.client.aai.AAIResourcesClient;
  46 import org.onap.so.client.aai.AAIObjectType;
  47 import static org.onap.so.bpmn.infrastructure.pnf.dmaap.JsonUtilForPnfCorrelationId.*;
  48
  49 @Component
  50 public class PnfEventReadyDmaapClient implements DmaapClient {
  51
  52     private static final Logger logger = LoggerFactory.getLogger(PnfEventReadyDmaapClient.class);
  53
  54     private HttpClient httpClient;
  55     private Map<String, Runnable> pnfCorrelationIdToThreadMap;
  56     private HttpGet getRequest;
  57     private int topicListenerDelayInSeconds;
  58     private volatile ScheduledThreadPoolExecutor executor;
  59     private volatile boolean dmaapThreadListenerIsRunning;
  60     private volatile List<Map<String, String>> listOfUpdateInfoMap;
  61
  62     @Autowired
  63     public PnfEventReadyDmaapClient(Environment env) {
  64         httpClient = HttpClientBuilder.create().build();
  65         pnfCorrelationIdToThreadMap = new ConcurrentHashMap<>();
  66         topicListenerDelayInSeconds = env.getProperty("pnf.dmaap.topicListenerDelayInSeconds", Integer.class);
  67         executor = null;
  68         getRequest = new HttpGet(UriBuilder.fromUri(env.getProperty("pnf.dmaap.uriPathPrefix"))
  69                 .scheme(env.getProperty("pnf.dmaap.protocol")).host(env.getProperty("pnf.dmaap.host"))
  70                 .port(env.getProperty("pnf.dmaap.port", Integer.class)).path(env.getProperty("pnf.dmaap.topicName"))
  71                 .path(env.getProperty("pnf.dmaap.consumerGroup")).path(env.getProperty("pnf.dmaap.consumerId"))
  72                 .build());
  73         listOfUpdateInfoMap = new ArrayList<>();
  74     }
  75
  76     @Override
  77     public synchronized void registerForUpdate(String pnfCorrelationId, Runnable informConsumer,
  78             Map<String, String> updateInfo) {
  79         logger.debug("registering for pnf ready dmaap event for pnf correlation id: {}", pnfCorrelationId);
  80         synchronized (listOfUpdateInfoMap) {
  81             listOfUpdateInfoMap.add(updateInfo);
  82         }
  83         pnfCorrelationIdToThreadMap.put(pnfCorrelationId, informConsumer);
  84         if (!dmaapThreadListenerIsRunning) {
  85             startDmaapThreadListener();
  86         }
  87     }
  88
  89     @Override
  90     public synchronized Runnable unregister(String pnfCorrelationId) {
  91         logger.debug("unregistering from pnf ready dmaap event for pnf correlation id: {}", pnfCorrelationId);
  92         Runnable runnable = pnfCorrelationIdToThreadMap.remove(pnfCorrelationId);
  93         synchronized (listOfUpdateInfoMap) {
  94             for (int i = listOfUpdateInfoMap.size() - 1; i >= 0; i--) {
  95                 if (!listOfUpdateInfoMap.get(i).containsKey("pnfCorrelationId"))
  96                     continue;
  97                 String id = listOfUpdateInfoMap.get(i).get("pnfCorrelationId");
  98                 if (id != pnfCorrelationId)
  99                     continue;
 100                 listOfUpdateInfoMap.remove(i);
 101             }
 102         }
 103         if (pnfCorrelationIdToThreadMap.isEmpty()) {
 104             stopDmaapThreadListener();
 105         }
 106         return runnable;
 107     }
 108
 109     private synchronized void startDmaapThreadListener() {
 110         if (!dmaapThreadListenerIsRunning) {
 111             executor = new ScheduledThreadPoolExecutor(1);
 112             executor.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
 113             executor.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
 114             executor.scheduleWithFixedDelay(new DmaapTopicListenerThread(), 0, topicListenerDelayInSeconds,
 115                     TimeUnit.SECONDS);
 116             dmaapThreadListenerIsRunning = true;
 117         }
 118     }
 119
 120     private synchronized void stopDmaapThreadListener() {
 121         if (dmaapThreadListenerIsRunning) {
 122             executor.shutdown();
 123             dmaapThreadListenerIsRunning = false;
 124             executor = null;
 125         }
 126     }
 127
 128     class DmaapTopicListenerThread implements Runnable {
 129
 130         @Override
 131         public void run() {
 132             try {
 133                 logger.debug("dmaap listener starts listening pnf ready dmaap topic");
 134                 HttpResponse response = httpClient.execute(getRequest);
 135                 if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
 136                     String responseString = EntityUtils.toString(response.getEntity(), StandardCharsets.UTF_8);
 137                     List<String> idList = parseJsonToGelAllPnfCorrelationId(responseString);
 138                     idList.stream().findFirst().ifPresent(id -> registerClientResponse(id, responseString));
 139                     idList.forEach(this::informAboutPnfReadyIfPnfCorrelationIdFound);
 140                 }
 141             } catch (IOException e) {
 142                 logger.error("Exception caught during sending rest request to dmaap for listening event topic", e);
 143             } finally {
 144                 getRequest.reset();
 145             }
 146         }
 147
 148         private void informAboutPnfReadyIfPnfCorrelationIdFound(String pnfCorrelationId) {
 149             Runnable runnable = unregister(pnfCorrelationId);
 150             if (runnable != null) {
 151                 logger.debug("dmaap listener gets pnf ready event for pnfCorrelationId: {}", pnfCorrelationId);
 152                 runnable.run();
 153             }
 154         }
 155
 156         private void registerClientResponse(String pnfCorrelationId, String response) {
 157
 158             String customerId = null;
 159             String serviceType = null;
 160             String serId = null;
 161             synchronized (listOfUpdateInfoMap) {
 162                 for (Map<String, String> map : listOfUpdateInfoMap) {
 163                     if (!map.containsKey("pnfCorrelationId"))
 164                         continue;
 165                     if (pnfCorrelationId != map.get("pnfCorrelationId"))
 166                         continue;
 167                     if (!map.containsKey("globalSubscriberID"))
 168                         continue;
 169                     if (!map.containsKey("serviceType"))
 170                         continue;
 171                     if (!map.containsKey("serviceInstanceId"))
 172                         continue;
 173                     customerId = map.get("pnfCorrelationId");
 174                     serviceType = map.get("serviceType");
 175                     serId = map.get("serviceInstanceId");
 176                 }
 177             }
 178             if (customerId == null || serviceType == null || serId == null)
 179                 return;
 180             AAIResourcesClient client = new AAIResourcesClient();
 181             AAIResourceUri uri = AAIUriFactory.createResourceUri(AAIObjectType.SERVICE_INSTANCE_METADATA, customerId,
 182                     serviceType, serId);
 183             client.update(uri, response);
 184         }
 185
 186     }
 187 }