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
|
/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.plugins.event.carrier.websocket;
import java.util.EnumMap;
import java.util.Map;
import org.onap.policy.apex.core.infrastructure.messaging.MessagingException;
import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessageClient;
import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessageListener;
import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessageServer;
import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessager;
import org.onap.policy.apex.core.infrastructure.threading.ApplicationThreadFactory;
import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
import org.onap.policy.apex.service.engine.event.ApexEventConsumer;
import org.onap.policy.apex.service.engine.event.ApexEventException;
import org.onap.policy.apex.service.engine.event.ApexEventReceiver;
import org.onap.policy.apex.service.engine.event.PeeredReference;
import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Concrete implementation an Apex event consumer that receives events using Kafka.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class ApexWebSocketConsumer implements ApexEventConsumer, WsStringMessageListener, Runnable {
private static final int WEB_SOCKET_WAIT_SLEEP_TIME = 100;
// Get a reference to the logger
private static final Logger LOGGER = LoggerFactory.getLogger(ApexWebSocketConsumer.class);
// The Web Socket properties
private WEBSOCKETCarrierTechnologyParameters webSocketConsumerProperties;
// The web socket messager, may be WS a server or a client
private WsStringMessager wsStringMessager;
// The event receiver that will receive events from this consumer
private ApexEventReceiver eventReceiver;
// The name for this consumer
private String name = null;
// The peer references for this event handler
private Map<EventHandlerPeeredMode, PeeredReference> peerReferenceMap = new EnumMap<>(EventHandlerPeeredMode.class);
// The consumer thread and stopping flag
private Thread consumerThread;
private boolean stopOrderedFlag = false;
// The number of events read to date
private int eventsRead = 0;
@Override
public void init(final String consumerName, final EventHandlerParameters consumerParameters,
final ApexEventReceiver incomingEventReceiver) throws ApexEventException {
this.eventReceiver = incomingEventReceiver;
this.name = consumerName;
// Check and get the Kafka Properties
if (!(consumerParameters.getCarrierTechnologyParameters() instanceof WEBSOCKETCarrierTechnologyParameters)) {
LOGGER.warn("specified consumer properties are not applicable to a web socket consumer");
throw new ApexEventException("specified consumer properties are not applicable to a web socket consumer");
}
webSocketConsumerProperties =
(WEBSOCKETCarrierTechnologyParameters) consumerParameters.getCarrierTechnologyParameters();
// Check if this is a server or a client Web Socket
if (webSocketConsumerProperties.isWsClient()) {
// Create a WS client
wsStringMessager = new WsStringMessageClient(webSocketConsumerProperties.getHost(),
webSocketConsumerProperties.getPort());
} else {
wsStringMessager = new WsStringMessageServer(webSocketConsumerProperties.getPort());
}
// Start reception of event strings on the web socket
try {
wsStringMessager.start(this);
} catch (final MessagingException e) {
LOGGER.warn("could not start web socket consumer");
}
}
/*
* (non-Javadoc)
*
* @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#start()
*/
@Override
public void start() {
// Configure and start the event reception thread
final String threadName = this.getClass().getName() + ":" + this.name;
consumerThread = new ApplicationThreadFactory(threadName).newThread(this);
consumerThread.setDaemon(true);
consumerThread.start();
}
/*
* (non-Javadoc)
*
* @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#getName()
*/
@Override
public String getName() {
return name;
}
/*
* (non-Javadoc)
*
* @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#getPeeredReference(org.onap.policy.apex.service.
* parameters. eventhandler.EventHandlerPeeredMode)
*/
@Override
public PeeredReference getPeeredReference(final EventHandlerPeeredMode peeredMode) {
return peerReferenceMap.get(peeredMode);
}
/*
* (non-Javadoc)
*
* @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#setPeeredReference(org.onap.policy.apex.service.
* parameters. eventhandler.EventHandlerPeeredMode, org.onap.policy.apex.service.engine.event.PeeredReference)
*/
@Override
public void setPeeredReference(final EventHandlerPeeredMode peeredMode, final PeeredReference peeredReference) {
peerReferenceMap.put(peeredMode, peeredReference);
}
/*
* (non-Javadoc)
*
* @see java.lang.Runnable#run()
*/
@Override
public void run() {
while (consumerThread.isAlive() && !stopOrderedFlag) {
ThreadUtilities.sleep(WEB_SOCKET_WAIT_SLEEP_TIME);
}
}
/*
* (non-Javadoc)
*
* @see org.onap.policy.apex.apps.uservice.producer.ApexEventProducer#stop()
*/
@Override
public void stop() {
if (wsStringMessager != null) {
wsStringMessager.stop();
}
stopOrderedFlag = true;
}
/*
* (non-Javadoc)
*
* @see
* org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageListener#receiveString(java.
* lang. String)
*/
@Override
public void receiveString(final String eventString) {
try {
eventReceiver.receiveEvent(eventString);
eventsRead++;
} catch (final Exception e) {
final String errorMessage = "Error sending event " + name + '_' + eventsRead + ", " + e.getMessage()
+ ", event:\n" + eventString;
LOGGER.warn(errorMessage);
}
}
}
|
