ceph/src/rocksdb/java/src/main/java/org/rocksdb/Snapshot.java

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5
   6 package org.rocksdb;
   7
   8 /**
   9  * Snapshot of database
  10  */
  11 public class Snapshot extends RocksObject {
  12   Snapshot(final long nativeHandle) {
  13     super(nativeHandle);
  14
  15     // The pointer to the snapshot is always released
  16     // by the database instance.
  17     disOwnNativeHandle();
  18   }
  19
  20   /**
  21    * Return the associated sequence number;
  22    *
  23    * @return the associated sequence number of
  24    *     this snapshot.
  25    */
  26   public long getSequenceNumber() {
  27     return getSequenceNumber(nativeHandle_);
  28   }
  29
  30   @Override
  31   protected final void disposeInternal(final long handle) {
  32     /**
  33      * Nothing to release, we never own the pointer for a
  34      * Snapshot. The pointer
  35      * to the snapshot is released by the database
  36      * instance.
  37      */
  38   }
  39
  40   private native long getSequenceNumber(long handle);
  41 }