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
|
/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2022 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.clamp.acm.element.handler;
import java.io.IOException;
import java.util.List;
import org.onap.policy.clamp.models.acm.messages.dmaap.element.ElementMessageType;
import org.onap.policy.common.endpoints.event.comm.TopicEndpointManager;
import org.onap.policy.common.endpoints.event.comm.TopicSink;
import org.onap.policy.common.endpoints.event.comm.TopicSource;
import org.onap.policy.common.endpoints.listeners.MessageTypeDispatcher;
import org.onap.policy.common.endpoints.parameters.TopicParameterGroup;
import org.onap.policy.common.utils.services.ServiceManagerContainer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.event.ContextClosedEvent;
import org.springframework.context.event.EventListener;
import org.springframework.stereotype.Component;
/**
* This class activates the Kafka together with all its handlers.
*/
@Component
public class MessageActivator extends ServiceManagerContainer implements AutoCloseable {
private static final Logger LOGGER = LoggerFactory.getLogger(MessageActivator.class);
private static final String[] MSG_TYPE_NAMES = { "messageType" };
// Topics from which the AC element receives and sends messages
private List<TopicSink> topicSinks;
private List<TopicSource> topicSources;
private final MessageListener listener;
private final MessagePublisher publisher;
private MessageTypeDispatcher msgDispatcher;
/**
* Constructor.
*
* @param listener MessageListener
* @param publisher MessagePublisher
*/
public MessageActivator(MessageListener listener, MessagePublisher publisher) {
super();
this.listener = listener;
this.publisher = publisher;
msgDispatcher = new MessageTypeDispatcher(MSG_TYPE_NAMES);
}
/**
* Activate publisher and listener messages.
*
* @param parameters TopicParameterGroup
*/
public void activate(final TopicParameterGroup parameters) {
topicSinks = TopicEndpointManager.getManager().addTopicSinks(parameters.getTopicSinks());
topicSources = TopicEndpointManager.getManager().addTopicSources(parameters.getTopicSources());
// @formatter:off
addAction("Topic endpoint management",
() -> TopicEndpointManager.getManager().start(),
() -> TopicEndpointManager.getManager().shutdown());
addAction("Message Publisher",
() -> publisher.active(topicSinks), publisher::stop);
addAction("Message Listener",
() -> msgDispatcher.register(ElementMessageType.STATUS.name(), listener),
() -> msgDispatcher.unregister(ElementMessageType.STATUS.name()));
addAction("Topic Message Dispatcher", this::registerMsgDispatcher, this::unregisterMsgDispatcher);
// @formatter:on
start();
LOGGER.info("Kafka configuration initialised successfully");
}
/**
* Handle ContextClosedEvent.
*
* @param ctxClosedEvent ContextClosedEvent
*/
@EventListener
public void handleContextClosedEvent(ContextClosedEvent ctxClosedEvent) {
deactivate();
}
/**
* Deactivate publisher and listener messages.
*/
public void deactivate() {
if (isAlive()) {
stop();
}
}
/**
* Registers the dispatcher with the topic source(s).
*/
private void registerMsgDispatcher() {
for (final TopicSource source : topicSources) {
source.register(msgDispatcher);
}
}
/**
* Unregisters the dispatcher from the topic source(s).
*/
private void unregisterMsgDispatcher() {
for (final TopicSource source : topicSources) {
source.unregister(msgDispatcher);
}
}
@Override
public void close() throws IOException {
if (isAlive()) {
super.shutdown();
LOGGER.info("Kafka configuration is uninitialised.");
}
}
}
|
