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.onap.so.bpmn.infrastructure.pnf.dmaap;
23 import java.io.IOException;
25 import java.util.Collections;
26 import java.util.List;
28 import java.util.concurrent.ConcurrentHashMap;
29 import java.util.concurrent.Executors;
30 import java.util.concurrent.ScheduledExecutorService;
31 import java.util.concurrent.TimeUnit;
33 import javax.ws.rs.core.UriBuilder;
35 import org.apache.http.HttpResponse;
36 import org.apache.http.client.HttpClient;
37 import org.apache.http.client.methods.HttpGet;
38 import org.apache.http.impl.client.HttpClientBuilder;
39 import org.apache.http.util.EntityUtils;
40 import org.onap.so.logger.MsoLogger;
41 import org.springframework.beans.factory.annotation.Autowired;
42 import org.springframework.context.annotation.Scope;
43 import org.springframework.core.env.Environment;
44 import org.springframework.stereotype.Component;
48 public class PnfEventReadyDmaapClient implements DmaapClient {
50 private static final MsoLogger LOGGER = MsoLogger.getMsoLogger(MsoLogger.Catalog.RA, PnfEventReadyDmaapClient.class);
52 private static final String JSON_PATH_CORRELATION_ID = "$.pnfRegistrationFields.correlationId";
55 private Environment env;
56 private HttpClient httpClient;
57 private String dmaapHost;
58 private int dmaapPort;
59 private String dmaapProtocol;
60 private String dmaapUriPathPrefix;
61 private String dmaapTopicName;
62 private String consumerId;
63 private String consumerGroup;
64 private Map<String, Runnable> pnfCorrelationIdToThreadMap;
65 private HttpGet getRequest;
66 private ScheduledExecutorService executor;
67 private int dmaapClientDelayInSeconds;
68 private volatile boolean dmaapThreadListenerIsRunning;
71 httpClient = HttpClientBuilder.create().build();
72 pnfCorrelationIdToThreadMap = new ConcurrentHashMap<>();
73 dmaapHost = env.getProperty("pnf.dmaap.host");
74 dmaapPort = env.getProperty("pnf.dmaap.port", Integer.class);
76 getRequest = new HttpGet(buildURI());
80 public synchronized void registerForUpdate(String correlationId, Runnable informConsumer) {
81 LOGGER.debug("registering for pnf ready dmaap event for correlation id: " + correlationId);
82 pnfCorrelationIdToThreadMap.put(correlationId, informConsumer);
83 if (!dmaapThreadListenerIsRunning) {
84 startDmaapThreadListener();
89 public synchronized Runnable unregister(String correlationId) {
90 LOGGER.debug("unregistering from pnf ready dmaap event for correlation id: " + 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(new DmaapTopicListenerThread(), 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 public void setDmaapProtocol(String dmaapProtocol) {
124 this.dmaapProtocol = dmaapProtocol;
127 public void setDmaapUriPathPrefix(String dmaapUriPathPrefix) {
128 this.dmaapUriPathPrefix = dmaapUriPathPrefix;
131 public void setDmaapTopicName(String dmaapTopicName) {
132 this.dmaapTopicName = dmaapTopicName;
135 public void setConsumerId(String consumerId) {
136 this.consumerId = consumerId;
139 public void setConsumerGroup(String consumerGroup) {
140 this.consumerGroup = consumerGroup;
143 public void setDmaapClientDelayInSeconds(int dmaapClientDelayInSeconds) {
144 this.dmaapClientDelayInSeconds = dmaapClientDelayInSeconds;
147 class DmaapTopicListenerThread implements Runnable {
152 HttpResponse response = httpClient.execute(getRequest);
153 getCorrelationIdListFromResponse(response).forEach(this::informAboutPnfReadyIfCorrelationIdFound);
154 } catch (IOException e) {
155 LOGGER.error("Exception caught during sending rest request to dmaap for listening event topic", e);
159 private List<String> getCorrelationIdListFromResponse(HttpResponse response) throws IOException {
160 if (response.getStatusLine().getStatusCode() == 200) {
161 String responseString = EntityUtils.toString(response.getEntity(), "UTF-8");
162 if (responseString != null) {
163 return JsonUtilForCorrelationId.parseJsonToGelAllCorrelationId(responseString);
166 return Collections.emptyList();
169 private synchronized void informAboutPnfReadyIfCorrelationIdFound(String correlationId) {
170 Runnable runnable = unregister(correlationId);
171 if (runnable != null) {
172 LOGGER.debug("pnf ready event got from dmaap for correlationId: " + correlationId);