org.rocksdb.WriteBufferManager Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of rocksdbjni Show documentation

RocksDB fat jar that contains .so files for linux32 and linux64 (glibc and musl-libc), jnilib files for Mac OSX, and a .dll for Windows x64.

There is a newer version: 9.7.3

Show newest version

// Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
//  This source code is licensed under both the GPLv2 (found in the
//  COPYING file in the root directory) and Apache 2.0 License
//  (found in the LICENSE.Apache file in the root directory).

package org.rocksdb;

/**
 * Java wrapper over native write_buffer_manager class
 */
public class WriteBufferManager extends RocksObject {
  static {
    RocksDB.loadLibrary();
  }

  /**
   * Construct a new instance of WriteBufferManager.
   *
   * Check 
   *     https://github.com/facebook/rocksdb/wiki/Write-Buffer-Manager
   * for more details on when to use it
   *
   * @param bufferSizeBytes buffer size(in bytes) to use for native write_buffer_manager
   * @param cache cache whose memory should be bounded by this write buffer manager
   * @param allowStall if set true, it will enable stalling of writes when memory_usage() exceeds
   *     buffer_size.
   *        It will wait for flush to complete and memory usage to drop down.
   */
  public WriteBufferManager(
      final long bufferSizeBytes, final Cache cache, final boolean allowStall) {
    super(newWriteBufferManager(bufferSizeBytes, cache.nativeHandle_, allowStall));
    this.allowStall_ = allowStall;
  }

  public WriteBufferManager(final long bufferSizeBytes, final Cache cache){
    this(bufferSizeBytes, cache, false);
  }

  public boolean allowStall() {
    return allowStall_;
  }

  private native static long newWriteBufferManager(
      final long bufferSizeBytes, final long cacheHandle, final boolean allowStall);

  @Override
  protected native void disposeInternal(final long handle);

  private boolean allowStall_;
}