/*

 * Copyright (c) 2010, 2012, 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 4521942

 * @summary Ensure that InputStreamReaders work properly

 *          when the underlying byte stream times out

 */

import java.io.Closeable;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.InterruptedIOException;

import java.io.OutputStreamWriter;

import java.io.PrintStream;

import java.io.Reader;

import java.io.Writer;

import java.net.ServerSocket;

import java.net.Socket;

public class StreamTimeout {

    static final PrintStream log = System.err;

    static String charset = "US-ASCII";

    private static class Client extends Thread implements Closeable {

        private final Socket so;

        Client(int port) throws IOException {

            so = new Socket("127.0.0.1", port);

        }

        @Override

        public void run() {

            try {

                Writer wr = new OutputStreamWriter(so.getOutputStream(),

                        charset);

                wr.write("ab");

                wr.flush();

            } catch (IOException x) {

                log.print("Unexpected exception in writer: ");

                x.printStackTrace();

            }

        }

        @Override

        public void close() throws IOException {

            so.close();

        }

    }

    private static void gobble(InputStream is, Reader rd,

            int ec, boolean force)

                    throws Exception

                    {

        int a = is.available();

        boolean r = rd.ready();

        log.print("" + a + " bytes available, "

                + "reader " + (r ? "" : "not ") + "ready");

        if (!r && !force) {

            log.println();

            return;

        }

        int c;

        try {

            c = rd.read();

        } catch (InterruptedIOException x) {

            log.println();

            throw x;

        }

        log.println(", read() ==> "

                + (c >= 0 ? ("'" + (char)c + "'" ): "EOF"));

        if (c != ec)

            throw new Exception("Incorrect value read: Expected "

                    + ec + ", read " + (char)c);

    }

    public static void main(String[] args) throws Exception {

        if (args.length > 0)

            charset = args[0];

        try(ServerSocket ss = new ServerSocket(0);

            Client cl = new Client(ss.getLocalPort())) {

            cl.start();

            try(Socket s = ss.accept()) {

                s.setSoTimeout(150);

                try(InputStream is = s.getInputStream();

                    Reader rd = new InputStreamReader(is, charset)) {

                    while (is.available() <= 0)

                        Thread.yield();

                    gobble(is, rd, 'a', false);

                    gobble(is, rd, 'b', false);

                    gobble(is, rd, -1, false);

                    boolean caught = false;

                    try {

                        gobble(is, rd, -1, true);

                    } catch (InterruptedIOException e) {

                        log.println("Read timed out, as expected");

                        caught = true;

                    }

                    if (!caught) {

                        log.println("Read did not time out, test inapplicable");

                        return;

                    }

                    caught = false;

                    try {

                        gobble(is, rd, -1, true);

                    } catch (InterruptedIOException x) {

                        log.println("Second read timed out, as expected");

                        caught = true;

                    }

                    if (!caught)

                        throw new Exception("Second read completed");

                }

            }

            cl.join();

        }

    }

}