/*

 * Copyright 1997 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/* @test

   @bug 4094889

   @summary rmid can have a corrupted log

 */

/* Fault: ReliableLog used RandomAccessFile.skipBytes() to seek past the end

 * of a file.  Unfortunately, skipBytes() doesn't do that, so the file was

 * being misaligned.

 *

 * Reproduced by writing an odd number of bytes into an update, and then

 * reloading.

 */

import java.io.File;

import java.io.PrintStream;

import java.io.Serializable;

import sun.rmi.log.LogHandler;

import sun.rmi.log.ReliableLog;

//import javasoft.sqe.harness.Status;

//import javasoft.sqe.harness.Test;

public class LogAlignmentTest

    extends LogHandler

    implements Serializable //, Test

{

    static public void main (String[] argv)

    {

        LogAlignmentTest test = new LogAlignmentTest();

        //Status status = test.run (argv, System.err, System.out);

        //status.exit();

        test.run (argv, System.err, System.out);

    }

    //public Status run (String argv[], PrintStream log, PrintStream out)

    public void run (String argv[], PrintStream log, PrintStream out)

    {

        try {

            regtest(130, "./logalign_tmp", log, out);

            regtest(131, "./logalign_tmp", log, out);

        } catch (Exception e) {

            e.printStackTrace (log);

            //return (Status.failed

            throw (new RuntimeException

                    ("Exception in regression test for bugid 4094889"));

        }

        //return (Status.passed ("OKAY"));

    }

    static private void regtest(int updatesz, String dir, PrintStream lg, PrintStream out)

        throws Exception

    {

        try {

            LogAlignmentTest handler = new LogAlignmentTest();

            ReliableLog log = new ReliableLog (dir, handler, false);

            // Write a preamble update

            String c = "[";

            handler.basicUpdate (c);

            log.update (c, true);

            // Generate the requested size update (single chars)

            char[] up = new char[updatesz];

            int i;

            for (i = 0; i < updatesz; i++) {

                up[i] = (char)(65 + (i % 26));

            }

            c = new String (up);

            handler.basicUpdate (c);

            log.update (c, true);

            // Write it again, so we can misalign

            handler.basicUpdate (c);

            log.update (c, true);

            // Write the suffix

            c = "]";

            handler.basicUpdate (c);

            log.update (c, true);

            // Read it back using a new context.

            LogAlignmentTest handler2 = new LogAlignmentTest();

            ReliableLog carbon = new ReliableLog (dir, handler2, false);

            Object thingy = carbon.recover();

            // The report bit

            String orig = handler.contents;

            String news = ((LogAlignmentTest)thingy).contents;

            lg.println ("Original as saved: " + orig);

            lg.println ("As restored      : " + news);

            if (orig.compareTo (news) != 0) {

                throw new RuntimeException ("Restored string was different from saved string");

            } else {

                lg.println ("Matched OK.  Test element passed.");

            }

        } finally {

            // Trash the log directory, so a new snap will be taken in the next test

            try {

                File vs = new File (dir, "Version_Number");

                vs.delete();

            } catch (Exception e) {

            }

            try {

                File vs = new File (dir, "New_Version_Number");

                vs.delete();

            } catch (Exception e) {

            }

        }

    }

    private String contents;

    public LogAlignmentTest()

    {

        super();

        this.contents = "?";

    }

    // implements LogHandler.initialSnapshot()

    public Object initialSnapshot()

        throws Exception

    {

        this.contents = "";

        return (this);

    }

    // implements LogHandler.applyUpdate()

    public Object applyUpdate (Object update, Object state)

        throws Exception

    {

        // basicUpdate appends the string

        ((LogAlignmentTest)state).basicUpdate ((String)update);

        return (state);

    }

    // an "update" is a short string to append to this.contents (must ignore state)

    public void basicUpdate (String extra)

    {

        this.contents = this.contents + extra;

    }

}