/*

 * 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

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 */

/* @test

 * @bug 4319866

 * @summary Verify that ReliableLog.snapshotSize() returns correct snapshot

 *          file size even if LogHandler doesn't flush.

 *

 * @run main/othervm SnapshotSize

 */

import java.io.ByteArrayOutputStream;

import java.io.OutputStream;

import java.io.ObjectOutputStream;

import java.io.IOException;

import sun.rmi.log.LogHandler;

import sun.rmi.log.ReliableLog;

public class SnapshotSize extends LogHandler {

    int lastSnapshotSize = -1;

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

        SnapshotSize handler = new SnapshotSize();

        ReliableLog log = new ReliableLog(".", handler);

        if (log.snapshotSize() != handler.lastSnapshotSize) {

            throw new Error();

        }

        String[] snapshots = { "some", "sample", "objects", "to", "snapshot" };

        for (int i = 0; i < snapshots.length; i++) {

            log.snapshot(snapshots[i]);

            if (log.snapshotSize() != handler.lastSnapshotSize) {

                throw new Error();

            }

        }

    }

    public Object initialSnapshot() {

        return "initial snapshot";

    }

    public void snapshot(OutputStream out, Object value) throws IOException {

        ByteArrayOutputStream bout = new ByteArrayOutputStream();

        ObjectOutputStream oout = new ObjectOutputStream(bout);

        oout.writeObject(value);

        oout.close();

        byte[] buf = bout.toByteArray();

        out.write(buf);         // leave unflushed

        lastSnapshotSize = buf.length;

    }

    public Object applyUpdate(Object update, Object state) {

        return state;

    }

}