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
|
/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017-2018 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.
*
* ============LICENSE_END=========================================================
*/
package org.onap.appc.listener.impl;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.apache.commons.lang3.concurrent.BasicThreadFactory;
import org.onap.appc.listener.Controller;
import org.onap.appc.listener.Listener;
import org.onap.appc.listener.ListenerProperties;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
/**
* A common implementation of a controller. This controller should not need to be modified to implement new listeners
*
*/
public class ControllerImpl implements Controller {
private final EELFLogger LOG = EELFManager.getInstance().getLogger(ControllerImpl.class);
private int LISTENER_COUNT = 1;
private Map<ListenerProperties, Listener> listeners = null;
private ThreadPoolExecutor executor;
/**
* Creates a Controller with the set of listener properties which will be used to start listener threads.
*
* @param properties
* A non null Set of ListenerProperties
*/
public ControllerImpl(Set<ListenerProperties> properties) {
listeners = new HashMap<ListenerProperties, Listener>();
for (ListenerProperties props : properties) {
if (props.getClass() != null) {
listeners.put(props, null);
} else {
LOG.error(String.format(
"The ListenerProperties %s has no Listener class associated with it and will not run.", props));
properties.remove(props);
}
}
LISTENER_COUNT = properties.size();
// Only create executor if listeners are configured
if (LISTENER_COUNT > 0) {
executor = new ThreadPoolExecutor(LISTENER_COUNT, LISTENER_COUNT, 1, TimeUnit.SECONDS,
new ArrayBlockingQueue<Runnable>(LISTENER_COUNT));
// Custom Named thread factory
BasicThreadFactory threadFactory = new BasicThreadFactory.Builder().namingPattern("Appc-Listener-%d").build();
executor.setThreadFactory(threadFactory);
}
}
@Override
public void start() {
LOG.info("Starting DMaaP Controller.");
for (ListenerProperties props : listeners.keySet()) {
try {
if (props.isDisabled()) {
LOG.warn(String.format("The listener %s is disabled and will not be run", props.getPrefix()));
} else {
Listener l = props.getListenerClass().getConstructor(ListenerProperties.class).newInstance(props);
l.setListenerId(props.getPrefix());
listeners.put(props, l);
executor.execute(l);
}
} catch (Exception e) {
LOG.error(String.format("Exception while starting listener %s.", props), e);
}
}
}
@Override
public void stop(boolean stopNow) {
LOG.info("Stopping DMaaP Controller.");
Iterator<Listener> itr = listeners.values().iterator();
while (itr.hasNext()) {
Listener l = itr.next();
if (stopNow && l != null) {
l.stopNow();
} else if(l!=null){
l.stop();
}
itr.remove();
}
// disable new tasks from being submitted
if(executor != null) {
executor.shutdown();
int timeout=300;
try {
if (!executor.awaitTermination(timeout, TimeUnit.SECONDS)) {
LOG.error("Not all tasks completed execution after " + timeout + " seconds. " +
"Attempting to stop all actively executing tasks.");
executor.shutdownNow();
}
if (!executor.awaitTermination(timeout, TimeUnit.SECONDS)) {
LOG.error("Could not terminate all tasks after " + (timeout*2) + " seconds.");
}
} catch (InterruptedException e) {
executor.shutdownNow();
Thread.currentThread().interrupt();
}
}
}
@Override
public Map<ListenerProperties, Listener> getListeners() {
return listeners;
}
}
|