2 * ============LICENSE_START=======================================================
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
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.openecomp.mso.bpmn.infrastructure.pnf.dmaap;
23 import com.google.common.annotations.VisibleForTesting;
24 import java.io.IOException;
27 import java.util.Optional;
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.jsonpath.JsonPathUtil;
39 import org.openecomp.mso.logger.MsoLogger;
41 public class PnfEventReadyConsumer implements DmaapClient {
43 private static final MsoLogger LOGGER = MsoLogger.getMsoLogger(MsoLogger.Catalog.RA);
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 dmaapClientDelayInSeconds;
58 private volatile boolean dmaapThreadListenerIsRunning;
60 public PnfEventReadyConsumer() {
61 httpClient = HttpClientBuilder.create().build();
62 pnfCorrelationIdToThreadMap = new ConcurrentHashMap<>();
67 getRequest = new HttpGet(buildURI());
70 //TODO: extract this logic to separate class and test it there to avoid using VisibleForTesting
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);
82 public synchronized void registerForUpdate(String correlationId, Runnable informConsumer) {
83 pnfCorrelationIdToThreadMap.put(correlationId, informConsumer);
84 if (!dmaapThreadListenerIsRunning) {
85 startDmaapThreadListener();
90 public synchronized Runnable unregister(String correlationId) {
91 Runnable runnable = pnfCorrelationIdToThreadMap.remove(correlationId);
92 if (pnfCorrelationIdToThreadMap.isEmpty()) {
93 stopDmaapThreadListener();
98 private synchronized void startDmaapThreadListener() {
99 if (!dmaapThreadListenerIsRunning) {
100 executor = Executors.newScheduledThreadPool(1);
101 executor.scheduleWithFixedDelay(this::sendRequest, 0,
102 dmaapClientDelayInSeconds, TimeUnit.SECONDS);
103 dmaapThreadListenerIsRunning = true;
107 private synchronized void stopDmaapThreadListener() {
108 if (dmaapThreadListenerIsRunning) {
109 executor.shutdownNow();
110 dmaapThreadListenerIsRunning = false;
115 private URI buildURI() {
116 return UriBuilder.fromUri(dmaapUriPathPrefix)
117 .scheme(dmaapProtocol)
119 .port(dmaapPort).path(dmaapTopicName)
120 .path(consumerGroup).path(consumerId).build();
123 private Optional<String> getCorrelationIdFromResponse(HttpResponse response) throws IOException {
124 if (response.getStatusLine().getStatusCode() == 200) {
125 String responseString = EntityUtils.toString(response.getEntity(), "UTF-8");
126 if (responseString != null) {
127 return JsonPathUtil.getInstance().locateResult(responseString, JSON_PATH_CORRELATION_ID);
130 return Optional.empty();
134 private synchronized void informAboutPnfReadyIfCorrelationIdFound(String correlationId) {
135 Runnable runnable = unregister(correlationId);
136 if (runnable != null) {
141 public void setDmaapHost(String dmaapHost) {
142 this.dmaapHost = dmaapHost;
145 public void setDmaapPort(int dmaapPort) {
146 this.dmaapPort = dmaapPort;
149 public void setDmaapProtocol(String dmaapProtocol) {
150 this.dmaapProtocol = dmaapProtocol;
153 public void setDmaapUriPathPrefix(String dmaapUriPathPrefix) {
154 this.dmaapUriPathPrefix = dmaapUriPathPrefix;
157 public void setDmaapTopicName(String dmaapTopicName) {
158 this.dmaapTopicName = dmaapTopicName;
161 public void setConsumerId(String consumerId) {
162 this.consumerId = consumerId;
165 public void setConsumerGroup(String consumerGroup) {
166 this.consumerGroup = consumerGroup;
169 public void setDmaapClientDelayInSeconds(int dmaapClientDelayInSeconds) {
170 this.dmaapClientDelayInSeconds = dmaapClientDelayInSeconds;