2 * Copyright 2017 ZTE Corporation.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.onap.holmes.dsa.dmaappolling;
19 import java.io.IOException;
20 import java.util.ArrayList;
21 import java.util.List;
22 import javax.ws.rs.client.Client;
23 import javax.ws.rs.client.ClientBuilder;
24 import javax.ws.rs.client.WebTarget;
25 import javax.ws.rs.core.Response;
28 import org.onap.holmes.common.api.stat.VesAlarm;
29 import org.onap.holmes.common.dropwizard.ioc.utils.ServiceLocatorHolder;
30 import org.onap.holmes.common.exception.CorrelationException;
34 public class Subscriber {
36 private DMaaPResponseUtil dMaaPResponseUtil = ServiceLocatorHolder.getLocator()
37 .getService(DMaaPResponseUtil.class);
40 * The number of milliseconds to wait for messages if none are immediately available. This
41 * should normally be used, and set at 15000 or higher.
43 private int timeout = 15000;
46 * The maximum number of messages to return
48 private int limit = 100;
51 * The number of milliseconds to poll interval time. This should normally be used, and set at
54 private int period = 15000;
56 private boolean secure;
59 private String consumerGroup = "homlesGroup1";
60 private String consumer = "homles1";
61 private String authInfo;
62 private String authExpDate;
64 public List<VesAlarm> subscribe() throws CorrelationException {
65 List<String> response;
67 response = getDMaaPData();
68 } catch (Exception e) {
69 throw new CorrelationException("Failed to get data from DMaaP.", e);
72 return extractVesAlarm(response);
73 } catch (Exception e) {
74 throw new CorrelationException("Failed to convert the response data to VES alarms.", e);
78 private List<String> getDMaaPData() {
79 Client client = ClientBuilder.newClient();
80 WebTarget webTarget = client.target(url + "/" + consumerGroup + "/" + consumer);
81 Response response = webTarget.queryParam("timeout", timeout).request().get();
82 return response.readEntity(List.class);
85 private List<VesAlarm> extractVesAlarm(List<String> responseEntity) throws IOException {
86 List<VesAlarm> vesAlarmList = new ArrayList<>();
87 for (String entity : responseEntity) {
88 vesAlarmList.add(dMaaPResponseUtil.convertJsonToVesAlarm(entity));