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.HashMap;
22 import java.util.List;
23 import java.util.UUID;
27 import org.apache.http.HttpResponse;
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;
31 import org.onap.holmes.common.utils.GsonUtil;
32 import org.onap.holmes.common.utils.HttpsUtils;
36 public class Subscriber {
38 private DMaaPResponseUtil dMaaPResponseUtil = ServiceLocatorHolder.getLocator()
39 .getService(DMaaPResponseUtil.class);
42 * The number of milliseconds to wait for messages if none are immediately available. This
43 * should normally be used, and set at 15000 or higher.
45 private int timeout = 15000;
48 * The maximum number of messages to return
50 private int limit = 100;
53 * The number of milliseconds to poll interval time. This should normally be used, and set at
56 private int period = 15000;
58 private boolean secure;
61 private String uuid = UUID.randomUUID() + "";
62 private String consumerGroup = "homlesGroup" + uuid;
63 private String consumer = "homles" + uuid;
64 private String authInfo;
65 private String authExpDate;
67 public List<VesAlarm> subscribe() throws CorrelationException {
68 List<String> response;
70 response = getDMaaPData();
71 } catch (Exception e) {
72 throw new CorrelationException("Failed to get data from DMaaP.", e);
75 return extractVesAlarm(response);
76 } catch (Exception e) {
77 throw new CorrelationException("Failed to convert the response data to VES alarms.", e);
81 private List<String> getDMaaPData() throws Exception {
84 HttpResponse httpResponse = HttpsUtils
85 .get(url + "/" + consumerGroup + "/" + consumer, new HashMap<>(), timeout);
86 response = HttpsUtils.extractResponseEntity(httpResponse);
87 } catch (Exception e) {
90 return GsonUtil.jsonToBean(response, List.class);
93 private List<VesAlarm> extractVesAlarm(List<String> responseEntity) throws IOException {
94 List<VesAlarm> vesAlarmList = new ArrayList<>();
95 for (String entity : responseEntity) {
96 vesAlarmList.add(dMaaPResponseUtil.convertJsonToVesAlarm(entity));