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products/Sources/formale Sprachen/Java/Openjdk/test/jdk/java/io/PipedInputStream/ (Sun/Oracle ^©) Datei vom 13.11.2022 mit Größe 2 kB

Quelle WriterLoop.java Sprache: JAVA

/*
* Copyright (c) 2005, 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  6219755
* @summary Write end loops infinitely when the
*          buffer is full and the read end has closed.
*/

import java.io.*;

public class WriterLoop extends Thread {

    static PipedOutputStream out;
    static PipedInputStream  in;

    public void run() {
        try {
            System.out.println("Writer started.");

            // without the fix, this test will hang at this point,
            // i.e inside the call to write()
            out.write(new byte[64*1024]);
        } catch (Throwable e) {

            // with the fix an IOException is caught
            System.out.println("Writer exception:");
            e.printStackTrace();
        } finally {
            System.out.println("Writer done.");
        }
    }

    public static void main(String args[]) throws Exception {
        in = new PipedInputStream();
        out = new PipedOutputStream(in);
        WriterLoop writer = new WriterLoop();
        writer.start();

        try {
            System.out.println("Reader reading...");
            in.read(new byte[2048]);

            System.out.println("Reader closing stream...");
            in.close();

            System.out.println("Reader sleeping 3 seconds...");
            Thread.sleep(3000);
        } catch (Throwable e) {
            System.out.println("Reader exception:");
            e.printStackTrace();
        } finally {
            System.out.println("Active threads:");
            Thread[] threads = new Thread[Thread.activeCount()];
            Thread.enumerate(threads);
            for (int i = 0; i < threads.length; i++) {
                System.out.println(" " + threads[i]);
            }
            System.out.println("Waiting for writer...");
            writer.join();
            System.out.println("Done.");
        }
    }
}

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