jdk/test/java/awt/datatransfer/Clipboard/GetContentsInterruptedTest.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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import java.awt.*;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;

/*
 * @test
 * @bug 4532299 4648733
 * @summary Tests that getting clipboard contents on the interrupted thread will
 *          not cause deadlock.Also check that lostOwnership event occurs while
 *          cross-JVM interaction
 * @author Kanishk Jethi
 * @run main GetContentsInterruptedTest
 */

public class GetContentsInterruptedTest implements ClipboardOwner {

    final Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
    final Transferable transferable = new StringSelection("TEXT");
    private final Object o = new Object();

    public static void main(String args[]) throws Exception {
        if (System.getProperty("os.name").startsWith("Mac")) {
            System.out.println("This tests should not be run on OS X. " +
                    "See CR 7124344 for more info");
        } else {
            boolean subTestFlag = false;
            for (String arg : args) {
                if (arg.indexOf("SubTest") != -1)
                    subTestFlag = true;
            }

            if (!subTestFlag) {
                new GetContentsInterruptedTest().performTest();
            } else {
                new GetContentsInterruptedTest().execute();
            }
        }
    }

    private void performTest() throws Exception {
        int retCode;
        String javaPath = System.getProperty("java.home", "");
        String javaClasspath = System.getProperty("java.class.path", ".");
        String command = javaPath + File.separator + "bin" +
            File.separator + "java -classpath " + javaClasspath +
            " GetContentsInterruptedTest SubTest";
        System.out.println(command);
        boolean processExit = false;

        clipboard.setContents(transferable, this);
        Process process = Runtime.getRuntime().exec(command);
        synchronized (o) {
            o.wait(10000);
        }

        try {
            retCode = process.exitValue();
            processExit = true;
        }catch (IllegalThreadStateException e){
            throw new RuntimeException(e);
        }
        System.out.println("[RESULT] : " +
                "The sub process has cleanly exited : PASS");

        System.out.println("[RESULT] : Child returned: " + retCode );

        InputStream errorStream = process.getErrorStream();
        System.out.println("========= Child process stderr ========");
        dumpStream(errorStream);
        System.out.println("=======================================");

        InputStream processInputStream = process.getInputStream();
        System.out.println("========= Child process output ========");
        dumpStream(processInputStream);
        System.out.println("=======================================");

        if (!processExit) {
            process.destroy();
            throw new RuntimeException("[RESULT] : " +
                    "The sub process has not exited : FAIL");
        }
    }

    /*
     * execute is run through another instance of this class.
     * it acquires the systemClipboard through another JVM.
     */
    public void execute() {
        System.out.println("Hello world");
        final ClipboardOwner clipboardOwner = new ClipboardOwner() {
            public void lostOwnership(Clipboard clipboard, Transferable contents) {
                System.exit(0);
            }
        };
        clipboard.setContents(transferable, clipboardOwner);
        synchronized (o) {
            try {
                o.wait();
            } catch (InterruptedException ie) {
                ie.printStackTrace();
            }
        }
    }

    public void dumpStream(InputStream in) throws IOException {
        String tempString;
        int count = in.available();
        while (count > 0) {
            byte[] b = new byte[count];
            in.read(b);
            tempString = new String(b);
            if (tempString.indexOf("Exception") != -1 )
                throw new RuntimeException("[RESULT] :" +
                        " Exception in child process : FAIL");
            System.out.println(tempString);
            count = in.available();
        }
    }

    public void lostOwnership(Clipboard clip, Transferable contents) {
        new Thread(() -> {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
            clipboard.getContents(null);
            Thread.currentThread().interrupt();
            clipboard.getContents(null);
            clipboard.setContents(transferable, null);
        }).start();
    }
}