bpmn/MSOInfrastructureBPMN/src/main/java/org/openecomp/mso/bpmn/infrastructure/pnf/dmaap/PnfEventReadyConsumer.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.Map;
  26 import java.util.Optional;
  27 import java.util.concurrent.ConcurrentHashMap;
  28 import java.util.concurrent.Executors;
  29 import java.util.concurrent.ScheduledExecutorService;
  30 import java.util.concurrent.TimeUnit;
  31 import javax.ws.rs.core.UriBuilder;
  32 import org.apache.http.HttpResponse;
  33 import org.apache.http.client.HttpClient;
  34 import org.apache.http.client.methods.HttpGet;
  35 import org.apache.http.impl.client.HttpClientBuilder;
  36 import org.apache.http.util.EntityUtils;
  37 import org.openecomp.mso.bpmn.infrastructure.pnf.implementation.DmaapClient;
  38 import org.openecomp.mso.jsonpath.JsonPathUtil;
  39 import org.openecomp.mso.logger.MsoLogger;
  40
  41 public class PnfEventReadyConsumer implements Runnable, DmaapClient {
  42
  43     private static final MsoLogger LOGGER = MsoLogger.getMsoLogger(MsoLogger.Catalog.RA);
  44
  45     private static final String JSON_PATH_CORRELATION_ID = "$.pnfRegistrationFields.correlationId";
  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 dmaapClientInitialDelayInSeconds;
  58     private int dmaapClientDelayInSeconds;
  59     private boolean dmaapThreadListenerIsRunning;
  60
  61     public PnfEventReadyConsumer() {
  62         httpClient = HttpClientBuilder.create().build();
  63         pnfCorrelationIdToThreadMap = new ConcurrentHashMap<>();
  64         executor = null;
  65     }
  66
  67     public void init() {
  68         getRequest = new HttpGet(buildURI());
  69     }
  70
  71     @Override
  72     public void run() {
  73         try {
  74             HttpResponse response = httpClient.execute(getRequest);
  75             getCorrelationIdFromResponse(response).ifPresent(this::informAboutPnfReadyIfCorrelationIdFound);
  76         } catch (IOException e) {
  77             LOGGER.error("Exception caught during sending rest request to dmaap for listening event topic", e);
  78         }
  79     }
  80
  81     @Override
  82     public void registerForUpdate(String correlationId, Runnable informConsumer) {
  83         pnfCorrelationIdToThreadMap.put(correlationId, informConsumer);
  84         if (!dmaapThreadListenerIsRunning) {
  85             startDmaapThreadListener();
  86         }
  87     }
  88
  89     private void startDmaapThreadListener() {
  90         executor = Executors.newScheduledThreadPool(1);
  91         executor.scheduleWithFixedDelay(this, dmaapClientInitialDelayInSeconds,
  92                 dmaapClientDelayInSeconds, TimeUnit.SECONDS);
  93         dmaapThreadListenerIsRunning = true;
  94     }
  95
  96     private void stopDmaapThreadListener() {
  97         if (dmaapThreadListenerIsRunning) {
  98             executor.shutdownNow();
  99             dmaapThreadListenerIsRunning = false;
 100             executor = null;
 101         }
 102     }
 103
 104     private URI buildURI() {
 105         return UriBuilder.fromUri(dmaapUriPathPrefix)
 106                 .scheme(dmaapProtocol)
 107                 .host(dmaapHost)
 108                 .port(dmaapPort).path(dmaapTopicName)
 109                 .path(consumerGroup).path(consumerId).build();
 110     }
 111
 112     private Optional<String> getCorrelationIdFromResponse(HttpResponse response) throws IOException {
 113         if (response.getStatusLine().getStatusCode() == 200) {
 114             String responseString = EntityUtils.toString(response.getEntity(), "UTF-8");
 115             if (responseString != null) {
 116                 return JsonPathUtil.getInstance().locateResult(responseString, JSON_PATH_CORRELATION_ID);
 117             }
 118         }
 119         return Optional.empty();
 120     }
 121
 122
 123     private void informAboutPnfReadyIfCorrelationIdFound(String correlationId) {
 124         pnfCorrelationIdToThreadMap.keySet().stream().filter(key -> key.equals(correlationId)).findAny()
 125                 .ifPresent(this::informAboutPnfReady);
 126     }
 127
 128     private void informAboutPnfReady(String correlationId) {
 129         pnfCorrelationIdToThreadMap.get(correlationId).run();
 130         pnfCorrelationIdToThreadMap.remove(correlationId);
 131
 132         if (pnfCorrelationIdToThreadMap.isEmpty()) {
 133             stopDmaapThreadListener();
 134         }
 135     }
 136
 137     public void setDmaapHost(String dmaapHost) {
 138         this.dmaapHost = dmaapHost;
 139     }
 140
 141     public void setDmaapPort(int dmaapPort) {
 142         this.dmaapPort = dmaapPort;
 143     }
 144
 145     public void setDmaapProtocol(String dmaapProtocol) {
 146         this.dmaapProtocol = dmaapProtocol;
 147     }
 148
 149     public void setDmaapUriPathPrefix(String dmaapUriPathPrefix) {
 150         this.dmaapUriPathPrefix = dmaapUriPathPrefix;
 151     }
 152
 153     public void setDmaapTopicName(String dmaapTopicName) {
 154         this.dmaapTopicName = dmaapTopicName;
 155     }
 156
 157     public void setConsumerId(String consumerId) {
 158         this.consumerId = consumerId;
 159     }
 160
 161     public void setConsumerGroup(String consumerGroup) {
 162         this.consumerGroup = consumerGroup;
 163     }
 164
 165     public void setDmaapClientInitialDelayInSeconds(int dmaapClientInitialDelayInSeconds) {
 166         this.dmaapClientInitialDelayInSeconds = dmaapClientInitialDelayInSeconds;
 167     }
 168
 169     public void setDmaapClientDelayInSeconds(int dmaapClientDelayInSeconds) {
 170         this.dmaapClientDelayInSeconds = dmaapClientDelayInSeconds;
 171     }
 172
 173 }