1 /*
   2  * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /* @test
  25  * @bug 4319866
  26  * @summary Verify that ReliableLog.snapshotSize() returns correct snapshot
  27  *          file size even if LogHandler doesn't flush.
  28  *
  29  * @run main SnapshotSize
  30  */
  31 
  32 import java.io.ByteArrayOutputStream;
  33 import java.io.OutputStream;
  34 import java.io.ObjectOutputStream;
  35 import java.io.IOException;
  36 import sun.rmi.log.LogHandler;
  37 import sun.rmi.log.ReliableLog;
  38 
  39 public class SnapshotSize extends LogHandler {
  40 
  41     int lastSnapshotSize = -1;
  42 
  43     public static void main(String[] args) throws Exception {
  44         SnapshotSize handler = new SnapshotSize();
  45         ReliableLog log = new ReliableLog(".", handler);
  46         if (log.snapshotSize() != handler.lastSnapshotSize) {
  47             throw new Error();
  48         }
  49 
  50         String[] snapshots = { "some", "sample", "objects", "to", "snapshot" };
  51         for (int i = 0; i < snapshots.length; i++) {
  52             log.snapshot(snapshots[i]);
  53             if (log.snapshotSize() != handler.lastSnapshotSize) {
  54                 throw new Error();
  55             }
  56         }
  57     }
  58 
  59     public Object initialSnapshot() {
  60         return "initial snapshot";
  61     }
  62 
  63     public void snapshot(OutputStream out, Object value) throws IOException {
  64         ByteArrayOutputStream bout = new ByteArrayOutputStream();
  65         ObjectOutputStream oout = new ObjectOutputStream(bout);
  66         oout.writeObject(value);
  67         oout.close();
  68 
  69         byte[] buf = bout.toByteArray();
  70         out.write(buf);         // leave unflushed
  71         lastSnapshotSize = buf.length;
  72     }
  73 
  74     public Object applyUpdate(Object update, Object state) {
  75         return state;
  76     }
  77 }