1/*
2 * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/* @test
25 * @bug 4521942
26 * @summary Ensure that InputStreamReaders work properly
27 *          when the underlying byte stream times out
28 */
29
30import java.io.Closeable;
31import java.io.IOException;
32import java.io.InputStream;
33import java.io.InputStreamReader;
34import java.io.InterruptedIOException;
35import java.io.OutputStreamWriter;
36import java.io.PrintStream;
37import java.io.Reader;
38import java.io.Writer;
39import java.net.ServerSocket;
40import java.net.Socket;
41
42public class StreamTimeout {
43    static final PrintStream log = System.err;
44    static String charset = "US-ASCII";
45
46    private static class Client extends Thread implements Closeable {
47        private final Socket so;
48
49        Client(int port) throws IOException {
50            so = new Socket("127.0.0.1", port);
51        }
52
53        @Override
54        public void run() {
55            try {
56                Writer wr = new OutputStreamWriter(so.getOutputStream(),
57                        charset);
58                wr.write("ab");
59                wr.flush();
60            } catch (IOException x) {
61                log.print("Unexpected exception in writer: ");
62                x.printStackTrace();
63            }
64        }
65
66        @Override
67        public void close() throws IOException {
68            so.close();
69        }
70    }
71
72    private static void gobble(InputStream is, Reader rd,
73            int ec, boolean force)
74                    throws Exception
75                    {
76        int a = is.available();
77        boolean r = rd.ready();
78        log.print("" + a + " bytes available, "
79                + "reader " + (r ? "" : "not ") + "ready");
80        if (!r && !force) {
81            log.println();
82            return;
83        }
84        int c;
85        try {
86            c = rd.read();
87        } catch (InterruptedIOException x) {
88            log.println();
89            throw x;
90        }
91        log.println(", read() ==> "
92                + (c >= 0 ? ("'" + (char)c + "'" ): "EOF"));
93        if (c != ec)
94            throw new Exception("Incorrect value read: Expected "
95                    + ec + ", read " + (char)c);
96    }
97
98    public static void main(String[] args) throws Exception {
99
100        if (args.length > 0)
101            charset = args[0];
102
103        try(ServerSocket ss = new ServerSocket(0);
104            Client cl = new Client(ss.getLocalPort())) {
105
106            cl.start();
107
108            try(Socket s = ss.accept()) {
109                s.setSoTimeout(150);
110
111                try(InputStream is = s.getInputStream();
112                    Reader rd = new InputStreamReader(is, charset)) {
113
114                    while (is.available() <= 0)
115                        Thread.yield();
116
117                    gobble(is, rd, 'a', false);
118                    gobble(is, rd, 'b', false);
119                    gobble(is, rd, -1, false);
120
121                    boolean caught = false;
122                    try {
123                        gobble(is, rd, -1, true);
124                    } catch (InterruptedIOException e) {
125                        log.println("Read timed out, as expected");
126                        caught = true;
127                    }
128                    if (!caught) {
129                        log.println("Read did not time out, test inapplicable");
130                        return;
131                    }
132
133                    caught = false;
134                    try {
135                        gobble(is, rd, -1, true);
136                    } catch (InterruptedIOException x) {
137                        log.println("Second read timed out, as expected");
138                        caught = true;
139                    }
140                    if (!caught)
141                        throw new Exception("Second read completed");
142                }
143            }
144
145            cl.join();
146        }
147    }
148}
149