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rocksdb/java/org/rocksdb/MemTableConfig.java

33 lines
1.3 KiB

// Copyright (c) 2014, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
package org.rocksdb;
/**
* MemTableConfig is used to config the internal mem-table of a RocksDB.
* It is required for each memtable to have one such sub-class to allow
* Java developers to use it.
*
* To make a RocksDB to use a specific MemTable format, its associated
* MemTableConfig should be properly set and passed into Options
* via Options.setMemTableFactory() and open the db using that Options.
*
* @see Options
*/
public abstract class MemTableConfig {
/**
* This function should only be called by Options.setMemTableConfig(),
* which will create a c++ shared-pointer to the c++ MemTableRepFactory
* that associated with the Java MemTableConfig.
*
* @see Options#setMemTableConfig(MemTableConfig)
*
* @return native handle address to native memory table instance.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
abstract protected long newMemTableFactoryHandle()
throws RocksDBException;
}