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
|
/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* * Modifications Copyright (C) 2020 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.plugins.event.carrier.websocket;
import java.util.Properties;
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.ThreadUtilities;
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.ApexPluginsEventConsumer;
import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
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 extends ApexPluginsEventConsumer implements WsStringMessageListener {
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 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 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");
}
// The Web Socket properties
WebSocketCarrierTechnologyParameters 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", e);
}
}
/**
* {@inheritDoc}.
*/
@Override
public void run() {
while (consumerThread.isAlive() && !stopOrderedFlag) {
ThreadUtilities.sleep(WEB_SOCKET_WAIT_SLEEP_TIME);
}
}
/**
* {@inheritDoc}.
*/
@Override
public void stop() {
if (wsStringMessager != null) {
wsStringMessager.stop();
}
stopOrderedFlag = true;
}
/**
* {@inheritDoc}.
*/
@Override
public void receiveString(final String eventString) {
try {
eventReceiver.receiveEvent(new Properties(), eventString);
eventsRead++;
} catch (final Exception e) {
final String errorMessage = "Error sending event " + name + '_' + eventsRead + ", " + e.getMessage()
+ ", event:\n" + eventString;
LOGGER.warn(errorMessage, e);
}
}
}
|
