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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
/*-
* ============LICENSE_START=======================================================
* ONAP-PDP-REST
* ================================================================================
* Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2019 Nordix Foundation.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.pdp.rest.notifications;
import com.att.nsa.cambria.client.CambriaBatchingPublisher;
import com.att.nsa.cambria.client.CambriaClientBuilders;
import com.att.research.xacml.util.XACMLProperties;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.GeneralSecurityException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.TimeUnit;
import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
import org.onap.policy.api.PolicyEngineException;
import org.onap.policy.common.logging.eelf.MessageCodes;
import org.onap.policy.common.logging.eelf.PolicyLogger;
import org.onap.policy.common.logging.flexlogger.FlexLogger;
import org.onap.policy.common.logging.flexlogger.Logger;
import org.onap.policy.pdp.rest.api.services.NotificationService;
import org.onap.policy.rest.XacmlRestProperties;
import org.onap.policy.utils.BusPublisher;
import org.onap.policy.xacml.api.XACMLErrorConstants;
/**
* The NotificationServer sends the Server Notifications to the Clients once there is any Event. WebSockets is being
* used as a medium for sending Notifications. UEB is being used as a medium for sending Notifications. DMAAP is being
* used as a medium for sending Notifications.
*
* @version 0.2
*
**/
@ServerEndpoint(value = "/notifications")
public class NotificationServer {
private static final Logger LOGGER = FlexLogger.getLogger(NotificationServer.class);
private static Queue<Session> queue = new ConcurrentLinkedQueue<>();
private static String update = null;
@OnOpen
public void openConnection(Session session) {
LOGGER.info("Session Connected: " + session.getId());
queue.add(session);
}
@OnClose
public void closeConnection(Session session) {
queue.remove(session);
}
/**
* Error callback method.
* @param session The session on which the error occurs
* @param throwable exception thrown on the error callback
*/
@OnError
public void error(Session session, Throwable throwable) {
queue.remove(session);
LOGGER.info(XACMLErrorConstants.ERROR_PROCESS_FLOW + "Session Error for : " + session.getId() + " Error: "
+ throwable.getMessage());
}
/**
* Message callback method.
* @param message the message on the callback
* @param session The session on which the error occurs
*/
@OnMessage
public void message(String message, Session session) {
if (message.equalsIgnoreCase("Manual")) {
try {
session.getBasicRemote().sendText(update);
session.close();
} catch (IOException e) {
LOGGER.info(XACMLErrorConstants.ERROR_PROCESS_FLOW + "Error in sending the Event Notification: "
+ e.getMessage() + e);
LOGGER.error(XACMLErrorConstants.ERROR_PROCESS_FLOW + "Error sending Message update");
}
}
}
/**
* Send a notification.
* @param notification The notification type
* @param propNotificationType Notification type properties
* @param pdpUrl URL of the PDP
* @throws PolicyEngineException on errors from the policy engine
* @throws IOException exceptions on IO errors
* @throws InterruptedException interrupts
*/
public static void sendNotification(String notification, String propNotificationType, String pdpUrl)
throws PolicyEngineException, IOException, InterruptedException {
LOGGER.debug("Notification set to " + propNotificationType);
if (propNotificationType.equals("ueb")) {
String topic = null;
try {
URL notificationUrl = new URL(pdpUrl);
topic = notificationUrl.getHost() + notificationUrl.getPort();
} catch (MalformedURLException e1) {
pdpUrl = pdpUrl.replace("/", "");
topic = pdpUrl.replace(":", "");
LOGGER.error(
XACMLErrorConstants.ERROR_PROCESS_FLOW + "Error in parsing out pdpURL for UEB notfication ");
PolicyLogger.error(MessageCodes.ERROR_PROCESS_FLOW, e1,
"Error in parsing out pdpURL for UEB notfication ");
}
String hosts = XACMLProperties.getProperty(XacmlRestProperties.PROP_NOTIFICATION_SERVERS);
String apiKey = XACMLProperties.getProperty(XacmlRestProperties.PROP_UEB_API_KEY);
String apiSecret = XACMLProperties.getProperty(XacmlRestProperties.PROP_UEB_API_SECRET);
LOGGER.debug("Creating Publisher for host: " + hosts + " with topic: " + topic);
CambriaBatchingPublisher pub = null;
try {
if (hosts == null || topic == null || apiKey == null || apiSecret == null) {
LOGGER.error(XACMLErrorConstants.ERROR_DATA_ISSUE
+ "UEB properties are missing from the property file ");
throw new PolicyEngineException(XACMLErrorConstants.ERROR_DATA_ISSUE
+ "UEB properties are missing from the property file ");
}
hosts = hosts.trim();
topic = topic.trim();
apiKey = apiKey.trim();
apiSecret = apiSecret.trim();
pub = new CambriaClientBuilders.PublisherBuilder().usingHosts(hosts).onTopic(topic)
.authenticatedBy(apiKey, apiSecret).build();
} catch (MalformedURLException e1) {
LOGGER.error(
XACMLErrorConstants.ERROR_PROCESS_FLOW + "Error creating the UEB publisher" + e1.getMessage());
} catch (GeneralSecurityException e1) {
LOGGER.error(XACMLErrorConstants.ERROR_PROCESS_FLOW + "Error creating the UEB publisher"
+ e1.getMessage() + e1);
}
if (pub != null) {
try {
pub.send("MyPartitionKey", notification);
} catch (IOException e) {
LOGGER.error(XACMLErrorConstants.ERROR_PROCESS_FLOW + "Error sending notification update"
+ e.getMessage() + e);
}
// close the publisher. The batching publisher does not send events
// immediately, so you MUST use close to send any remaining messages.
// You provide the amount of time you're willing to wait for the sends
// to succeed before giving up. If any messages are unsent after that time,
// they're returned to your app. You could, for example, persist to disk
// and try again later.
final List<?> stuck = pub.close(20, TimeUnit.SECONDS);
if (!stuck.isEmpty()) {
LOGGER.error(stuck.size() + " messages unsent");
} else {
LOGGER.info("Clean exit; all messages sent: " + notification);
}
}
} else if (propNotificationType.equals("dmaap")) {
// Setting up the Publisher for DMaaP MR
String dmaapServers = XACMLProperties.getProperty(XacmlRestProperties.PROP_NOTIFICATION_SERVERS);
String topic = XACMLProperties.getProperty(XacmlRestProperties.PROP_NOTIFICATION_TOPIC);
String aafLogin = XACMLProperties.getProperty("DMAAP_AAF_LOGIN");
String aafPassword = XACMLProperties.getProperty("DMAAP_AAF_PASSWORD");
try {
if (dmaapServers == null || topic == null) {
LOGGER.error(XACMLErrorConstants.ERROR_DATA_ISSUE
+ "DMaaP properties are missing from the property file ");
throw new PolicyEngineException(XACMLErrorConstants.ERROR_DATA_ISSUE
+ "DMaaP properties are missing from the property file ");
}
dmaapServers = dmaapServers.trim();
topic = topic.trim();
aafLogin = aafLogin.trim();
aafPassword = aafPassword.trim();
List<String> dmaapList = null;
if (dmaapServers.contains(",")) {
dmaapList = new ArrayList<>(Arrays.asList(dmaapServers.split("\\s*,\\s*")));
} else {
dmaapList = new ArrayList<>();
dmaapList.add(dmaapServers);
}
BusPublisher publisher =
new BusPublisher.DmaapPublisherWrapper(dmaapList, topic, aafLogin, aafPassword);
// Sending notification through DMaaP Message Router
publisher.send("MyPartitionKey", notification);
LOGGER.debug("Message Published on DMaaP :" + dmaapList.get(0) + "for Topic: " + topic);
publisher.close();
} catch (Exception e) {
LOGGER.error(XACMLErrorConstants.ERROR_PROCESS_FLOW + "Error sending notification update"
+ e.getMessage() + e);
}
}
for (Session session : queue) {
try {
LOGGER.info("\n Sending Notification: " + notification + " for client session id: " + session.getId()
+ "\n " + "PDPUrl is " + pdpUrl);
LOGGER.info("NotificationServer: sending text message");
session.getBasicRemote().sendText(notification);
} catch (IOException e) {
LOGGER.info(XACMLErrorConstants.ERROR_PROCESS_FLOW + "Error in sending the Event Notification: "
+ e.getMessage() + e);
}
}
NotificationService.sendNotification(notification);
}
public static void setUpdate(String update) {
NotificationServer.update = update;
}
}
|
