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
|
/*-
* ============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.core.infrastructure.threading;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;
/**
* This class provides a thread factory for use by classes that require thread factories to handle concurrent operation.
*
* @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
*/
public class ApplicationThreadFactory implements ThreadFactory {
private static final String HYPHEN = "-";
private static final String APPLICATION_NAME = "Apex-";
private static final AtomicInteger NEXT_POOL_NUMBER = new AtomicInteger();
private final ThreadGroup group;
private final AtomicInteger nextThreadNumber = new AtomicInteger();
private final String name;
private final long stackSize;
private final int threadPriority;
/**
* Instantiates a new application thread factory with a default stack size and normal thread priority.
*
* @param nameLocal the name local
*/
public ApplicationThreadFactory(final String nameLocal) {
this(nameLocal, 0);
}
/**
* Instantiates a new application thread factory with a default normal thread priority.
*
* @param nameLocal the name local
* @param stackSize the stack size
*/
public ApplicationThreadFactory(final String nameLocal, final long stackSize) {
this(nameLocal, stackSize, Thread.NORM_PRIORITY);
}
/**
* Instantiates a new application thread factory with a specified thread priority.
*
* @param nameLocal the name local
* @param stackSize the stack size
* @param threadPriority the thread priority
*/
public ApplicationThreadFactory(final String nameLocal, final long stackSize, final int threadPriority) {
final SecurityManager s = System.getSecurityManager();
group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
name = APPLICATION_NAME + nameLocal + HYPHEN + NEXT_POOL_NUMBER.getAndIncrement();
this.stackSize = stackSize;
this.threadPriority = threadPriority;
}
/*
* (non-Javadoc)
*
* @see java.util.concurrent.ThreadFactory#newThread(java.lang.Runnable)
*/
@Override
public Thread newThread(final Runnable r) {
final Thread thisThread;
if (stackSize > 0) {
thisThread = new Thread(group, r, name + ':' + nextThreadNumber.getAndIncrement(), stackSize);
} else {
thisThread = new Thread(group, r, name + ':' + nextThreadNumber.getAndIncrement());
}
if (thisThread.isDaemon()) {
thisThread.setDaemon(false);
}
thisThread.setPriority(threadPriority);
return thisThread;
}
/**
* Stop group threads.
*/
public void stopGroupThreads() {
group.interrupt();
group.list();
}
/**
* Gets the name of the thread factory.
*
* @return the name
*/
public String getName() {
return name;
}
/**
* Gets the stack size of the threads created by this thread factory.
*
* @return the stack size
*/
public long getStackSize() {
return stackSize;
}
/**
* Gets the thread priority of the threads created by this thread factory.
*
* @return the thread priority
*/
public int getThreadPriority() {
return threadPriority;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "ApplicationThreadFactory [nextPollNumber=" + NEXT_POOL_NUMBER + ",nextThreadNumber=" + nextThreadNumber
+ ", name=" + name + ", stackSize=" + stackSize + ", threadPriority=" + threadPriority + "]";
}
}
|