AbstractDocumentUndoConcurrentTest.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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 *
 * 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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/* @test
   @bug 8030702
   @summary Deadlock between subclass of AbstractDocument and UndoManager
   @author Semyon Sadetsky
  */

import javax.swing.text.PlainDocument;
import javax.swing.text.StringContent;
import javax.swing.undo.UndoManager;
import java.text.DecimalFormat;
import java.text.Format;
import java.util.concurrent.CyclicBarrier;

public class AbstractDocumentUndoConcurrentTest {
    static  CyclicBarrier barrier = new CyclicBarrier(3);

    private static PlainDocument doc1;
    private static PlainDocument doc2;
    private static Format format1 = new DecimalFormat("<Test1 0000>");
    private static Format format2 = new DecimalFormat("<Test22 0000>");

    public static void main(String[] args) throws Exception {
        test();
        System.out.println(doc1.getText(0, doc1.getLength()));
        System.out.println(doc2.getText(0, doc2.getLength()));
        System.out.println("ok");
    }

    private static void test() throws Exception {
        doc1 = new PlainDocument(new StringContent());
        final UndoManager undoManager = new UndoManager();

        doc1.addUndoableEditListener(undoManager);
        doc1.insertString(0, "<Test1 XXXX>", null);

        doc2 = new PlainDocument(new StringContent());

        doc2.addUndoableEditListener(undoManager);
        doc2.insertString(0, "<Test22 XXXX>", null);

        Thread t1 = new Thread("Thread doc1") {
            @Override
            public void run() {
                try {
                    barrier.await();
                    for (int i = 0; i < 1000; i++) {
                        doc1.insertString(0, format1.format(i), null);
                        if(doc1.getLength() > 100) doc1.remove(0, 12);
                    }

                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
                System.out.println("t1 done");
            }
        };

        Thread t2 = new Thread("Thread doc2") {
            @Override
            public void run() {
                try {
                    barrier.await();
                    for (int i = 0; i < 1000; i++) {
                        doc2.insertString(0, format2.format(i), null);
                        if(doc2.getLength() > 100) doc2.remove(0, 13);
                    }

                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
                System.out.println("t2 done");
            }
        };

        Thread t3 = new Thread("Undo/Redo Thread") {
            @Override
            public void run() {
                try {
                    barrier.await();
                } catch (Exception e) {
                    e.printStackTrace();
                }
                for (int i = 0; i < 1000; i++) {
                    if(undoManager.canUndoOrRedo()) {
                        undoManager.undoOrRedo();
                    }
                    if(undoManager.canUndo()) {
                        undoManager.undo();
                    }
                }
                System.out.println("t3 done");
            }
        };

        t1.start();
        t2.start();
        t3.start();

        t1.join();
        t2.join();
        t3.join();
    }
}