1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Copyright (C) 2017 Amdocs
* =============================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
* ============LICENSE_END=========================================================
*/
package org.onap.appc.adapter.messaging.dmaap.http;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.onap.appc.adapter.message.Consumer;
public class HttpDmaapConsumerImpl extends CommonHttpClient implements Consumer {
private final EELFLogger LOG = EELFManager.getInstance().getLogger(HttpDmaapConsumerImpl.class);
// Default values
private static final int DEFAULT_TIMEOUT_MS = 15000;
private static final int DEFAULT_LIMIT = 1000;
private static final String URL_TEMPLATE = "%s/events/%s/%s/%s";
private List<String> urls;
private String filter;
private boolean useHttps = false;
public HttpDmaapConsumerImpl(Collection<String> hosts, String topicName, String consumerName, String consumerId,
String filter) {
this(hosts, topicName, consumerName, consumerId, filter, null, null);
}
public HttpDmaapConsumerImpl(Collection<String> hosts, String topicName, String consumerName, String consumerId,
String filter, String user, String password) {
urls = new ArrayList<String>();
for (String host : hosts) {
urls.add(String.format(URL_TEMPLATE, formatHostString(host), topicName, consumerName, consumerId));
}
this.filter = filter;
updateCredentials(user, password);
}
@Override
public void updateCredentials(String user, String pass) {
LOG.debug(String.format("Setting auth to %s for %s", user, this.toString()));
this.setBasicAuth(user, pass);
}
@Override
public List<String> fetch(int waitMs, int limit) {
LOG.debug(String.format("Fetching up to %d records with %dms wait on %s", limit, waitMs, this.toString()));
List<String> out = new ArrayList<>();
try {
List<NameValuePair> urlParams = new ArrayList<>();
urlParams.add(new BasicNameValuePair("timeout", String.valueOf(waitMs)));
urlParams.add(new BasicNameValuePair("limit", String.valueOf(limit)));
if (filter != null) {
urlParams.add(new BasicNameValuePair("filter", filter));
}
URIBuilder builder = new URIBuilder(urls.get(0));
builder.setParameters(urlParams);
URI uri = builder.build();
LOG.info(String.format("GET %s", uri));
HttpGet request = getReq(uri, waitMs);
CloseableHttpResponse response = getClient().execute(request);
int httpStatus = response.getStatusLine().getStatusCode();
HttpEntity entity = response.getEntity();
String body = (entity != null) ? EntityUtils.toString(entity) : null;
LOG.debug(String.format("Request to %s completed with status %d and a body size of %s", uri, httpStatus,
(body != null ? body.length() : "null")));
response.close();
if (httpStatus == 200 && body != null) {
JSONArray json = new JSONArray(body);
LOG.info(String.format("Got %d messages from DMaaP", json.length()));
for (int i = 0; i < json.length(); i++) {
out.add(json.getString(i));
}
} else {
LOG.error(String.format("Did not get 200 from DMaaP. Got %d - %s", httpStatus, body));
sleep(waitMs);
}
} catch (Exception e) {
if (urls.size() > 1) {
String failedUrl = urls.remove(0);
urls.add(failedUrl);
LOG.debug(String.format("Moving host %s to the end of the pool. New primary host is %s", failedUrl,
urls.get(0)));
}
LOG.error(String.format("Got exception while querying DMaaP. Message: %s", e.getMessage()), e);
sleep(waitMs);
}
return out;
}
@Override
public List<String> fetch() {
return fetch(DEFAULT_TIMEOUT_MS, DEFAULT_LIMIT);
}
@Override
public String toString() {
String hostStr = (urls == null && !urls.isEmpty()) ? "N/A" : urls.get(0);
return String.format("Consumer listening to [%s]", hostStr);
}
@Override
public void useHttps(boolean yes) {
useHttps = yes;
}
private void sleep(int ms) {
LOG.info(String.format("Sleeping for %ds after failed request", ms / 1000));
try {
Thread.sleep(ms);
} catch (InterruptedException e1) {
LOG.error("Interrupted while sleeping");
}
}
@Override
public void close() {
// Nothing to do
}
}
|