bpmn/MSOInfrastructureBPMN/src/main/java/org/openecomp/mso/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  * 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
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  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=========================================================
  19  */
  20
  21 package org.openecomp.mso.bpmn.infrastructure.pnf.dmaap;
  22
  23 import java.io.IOException;
  24 import java.net.URI;
  25 import java.util.Collections;
  26 import java.util.List;
  27 import java.util.Map;
  28 import java.util.concurrent.ConcurrentHashMap;
  29 import java.util.concurrent.Executors;
  30 import java.util.concurrent.ScheduledExecutorService;
  31 import java.util.concurrent.TimeUnit;
  32 import javax.ws.rs.core.UriBuilder;
  33 import org.apache.http.HttpResponse;
  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.openecomp.mso.bpmn.core.PropertyConfiguration;
  39 import org.openecomp.mso.logger.MsoLogger;
  40 import org.openecomp.mso.logger.MsoLogger.Catalog;
  41
  42 public class PnfEventReadyDmaapClient implements DmaapClient {
  43
  44     private static final MsoLogger LOGGER = MsoLogger.getMsoLogger(Catalog.GENERAL);
  45
  46     private HttpClient httpClient;
  47     private String dmaapHost;
  48     private int dmaapPort;
  49     private String dmaapProtocol;
  50     private String dmaapUriPathPrefix;
  51     private String dmaapTopicName;
  52     private String consumerId;
  53     private String consumerGroup;
  54     private Map<String, Runnable> pnfCorrelationIdToThreadMap;
  55     private HttpGet getRequest;
  56     private ScheduledExecutorService executor;
  57     private int dmaapClientDelayInSeconds;
  58     private volatile boolean dmaapThreadListenerIsRunning;
  59
  60     public void init() {
  61         httpClient = HttpClientBuilder.create().build();
  62         pnfCorrelationIdToThreadMap = new ConcurrentHashMap<>();
  63         dmaapHost = PropertyConfiguration.getInstance().getProperties(PropertyConfiguration.MSO_BPMN_URN_PROPERTIES)
  64                 .get("mso.dmaap.host");
  65         dmaapPort = Integer.parseInt(PropertyConfiguration.getInstance()
  66                 .getProperties(PropertyConfiguration.MSO_BPMN_URN_PROPERTIES).get("mso.dmaap.port"));
  67         executor = null;
  68         getRequest = new HttpGet(buildURI());
  69     }
  70
  71     @Override
  72     public synchronized void registerForUpdate(String correlationId, Runnable informConsumer) {
  73         LOGGER.debug("registering for pnf ready dmaap event for correlation id: " + correlationId);
  74         pnfCorrelationIdToThreadMap.put(correlationId, informConsumer);
  75         if (!dmaapThreadListenerIsRunning) {
  76             startDmaapThreadListener();
  77         }
  78     }
  79
  80     @Override
  81     public synchronized Runnable unregister(String correlationId) {
  82         LOGGER.debug("unregistering from pnf ready dmaap event for correlation id: " + correlationId);
  83         Runnable runnable = pnfCorrelationIdToThreadMap.remove(correlationId);
  84         if (pnfCorrelationIdToThreadMap.isEmpty()) {
  85             stopDmaapThreadListener();
  86         }
  87         return runnable;
  88     }
  89
  90     private synchronized void startDmaapThreadListener() {
  91         if (!dmaapThreadListenerIsRunning) {
  92             executor = Executors.newScheduledThreadPool(1);
  93             executor.scheduleWithFixedDelay(new DmaapTopicListenerThread(), 0,
  94                     dmaapClientDelayInSeconds, TimeUnit.SECONDS);
  95             dmaapThreadListenerIsRunning = true;
  96         }
  97     }
  98
  99     private synchronized void stopDmaapThreadListener() {
 100         if (dmaapThreadListenerIsRunning) {
 101             executor.shutdownNow();
 102             dmaapThreadListenerIsRunning = false;
 103             executor = null;
 104         }
 105     }
 106
 107     private URI buildURI() {
 108         return UriBuilder.fromUri(dmaapUriPathPrefix)
 109                 .scheme(dmaapProtocol)
 110                 .host(dmaapHost)
 111                 .port(dmaapPort).path(dmaapTopicName)
 112                 .path(consumerGroup).path(consumerId).build();
 113     }
 114
 115     public void setDmaapProtocol(String dmaapProtocol) {
 116         this.dmaapProtocol = dmaapProtocol;
 117     }
 118
 119     public void setDmaapUriPathPrefix(String dmaapUriPathPrefix) {
 120         this.dmaapUriPathPrefix = dmaapUriPathPrefix;
 121     }
 122
 123     public void setDmaapTopicName(String dmaapTopicName) {
 124         this.dmaapTopicName = dmaapTopicName;
 125     }
 126
 127     public void setConsumerId(String consumerId) {
 128         this.consumerId = consumerId;
 129     }
 130
 131     public void setConsumerGroup(String consumerGroup) {
 132         this.consumerGroup = consumerGroup;
 133     }
 134
 135     public void setDmaapClientDelayInSeconds(int dmaapClientDelayInSeconds) {
 136         this.dmaapClientDelayInSeconds = dmaapClientDelayInSeconds;
 137     }
 138
 139     class DmaapTopicListenerThread implements Runnable {
 140
 141         @Override
 142         public void run() {
 143             try {
 144                 HttpResponse response = httpClient.execute(getRequest);
 145                 getCorrelationIdListFromResponse(response).forEach(this::informAboutPnfReadyIfCorrelationIdFound);
 146             } catch (IOException e) {
 147                 LOGGER.error("Exception caught during sending rest request to dmaap for listening event topic", e);
 148             }
 149         }
 150
 151         private List<String> getCorrelationIdListFromResponse(HttpResponse response) throws IOException {
 152             if (response.getStatusLine().getStatusCode() == 200) {
 153                 String responseString = EntityUtils.toString(response.getEntity(), "UTF-8");
 154                 if (responseString != null) {
 155                     return JsonUtilForCorrelationId.parseJsonToGelAllCorrelationId(responseString);
 156                 }
 157             }
 158             return Collections.emptyList();
 159         }
 160
 161         private synchronized void informAboutPnfReadyIfCorrelationIdFound(String correlationId) {
 162             Runnable runnable = unregister(correlationId);
 163             if (runnable != null) {
 164                 LOGGER.debug("pnf ready event got from dmaap for correlationId: " + correlationId);
 165                 runnable.run();
 166             }
 167         }
 168     }
 169
 170 }