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 package org.rocksdb;
6 
7 /**
8  * MemTableConfig is used to config the internal mem-table of a RocksDB.
9  * It is required for each memtable to have one such sub-class to allow
10  * Java developers to use it.
11  *
12  * To make a RocksDB to use a specific MemTable format, its associated
13  * MemTableConfig should be properly set and passed into Options
14  * via Options.setMemTableFactory() and open the db using that Options.
15  *
16  * @see Options
17  */
18 public abstract class MemTableConfig {
19   /**
20    * This function should only be called by Options.setMemTableConfig(),
21    * which will create a c++ shared-pointer to the c++ MemTableRepFactory
22    * that associated with the Java MemTableConfig.
23    *
24    * @see Options#setMemTableConfig(MemTableConfig)
25    *
26    * @return native handle address to native memory table instance.
27    */
newMemTableFactoryHandle()28   abstract protected long newMemTableFactoryHandle();
29 }
30