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
|
/*
* Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 4607272 6842687
* @summary Unit test for AsynchronousChannelGroup
*/
import java.nio.ByteBuffer;
import java.nio.channels.*;
import java.net.*;
import java.util.*;
import java.util.concurrent.*;
import java.io.IOException;
/**
* This test verifies that a channel or channel group can be closed from a
* completion handler when there are no threads available to handle I/O events.
*/
public class GroupOfOne {
public static void main(String[] args) throws Exception {
final List<AsynchronousSocketChannel> accepted = new ArrayList<>();
// create listener to accept connections
try (final AsynchronousServerSocketChannel listener =
AsynchronousServerSocketChannel.open()) {
listener.bind(new InetSocketAddress(0));
listener.accept((Void)null, new CompletionHandler<AsynchronousSocketChannel,Void>() {
public void completed(AsynchronousSocketChannel ch, Void att) {
synchronized (accepted) {
accepted.add(ch);
}
listener.accept((Void)null, this);
}
public void failed(Throwable exc, Void att) {
}
});
int port = ((InetSocketAddress)(listener.getLocalAddress())).getPort();
SocketAddress sa = new InetSocketAddress(InetAddress.getLocalHost(), port);
test(sa, true, false);
test(sa, false, true);
test(sa, true, true);
} finally {
// clean-up
synchronized (accepted) {
for (AsynchronousSocketChannel ch: accepted) {
ch.close();
}
}
}
}
static void test(SocketAddress sa,
final boolean closeChannel,
final boolean shutdownGroup)
throws Exception
{
// group with 1 thread
final AsynchronousChannelGroup group = AsynchronousChannelGroup
.withFixedThreadPool(1, new ThreadFactory() {
@Override
public Thread newThread(final Runnable r) {
return new Thread(r);
}});
final AsynchronousSocketChannel ch = AsynchronousSocketChannel.open(group);
try {
// the latch counts down when:
// 1. The read operation fails (expected)
// 2. the close/shutdown completes
final CountDownLatch latch = new CountDownLatch(2);
ch.connect(sa, (Void)null, new CompletionHandler<Void,Void>() {
public void completed(Void result, Void att) {
System.out.println("Connected");
// initiate I/O operation that does not complete (successfully)
ByteBuffer buf = ByteBuffer.allocate(100);
ch.read(buf, (Void)null, new CompletionHandler<Integer,Void>() {
public void completed(Integer bytesRead, Void att) {
throw new RuntimeException();
}
public void failed(Throwable exc, Void att) {
if (!(exc instanceof AsynchronousCloseException))
throw new RuntimeException(exc);
System.out.println("Read failed (expected)");
latch.countDown();
}
});
// close channel or shutdown group
try {
if (closeChannel) {
System.out.print("Close channel ...");
ch.close();
System.out.println(" done.");
}
if (shutdownGroup) {
System.out.print("Shutdown group ...");
group.shutdownNow();
System.out.println(" done.");
}
latch.countDown();
} catch (IOException e) {
throw new RuntimeException();
}
}
public void failed(Throwable exc, Void att) {
throw new RuntimeException(exc);
}
});
latch.await();
} finally {
// clean-up
group.shutdown();
boolean terminated = group.awaitTermination(20, TimeUnit.SECONDS);
if (!terminated)
throw new RuntimeException("Group did not terminate");
}
System.out.println("TEST OKAY");
}
}
|
