org.forstdb.Cache Maven / Gradle / Ivy

Go to download

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

ForSt fat jar with modifications specific for Apache Flink 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: 0.1.2-beta

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.forstdb;


public abstract class Cache extends RocksObject {
  protected Cache(final long nativeHandle) {
    super(nativeHandle);
  }

  /**
   * Returns the memory size for the entries
   * residing in cache.
   *
   * @return cache usage size.
   *
   */
  public long getUsage() {
    assert (isOwningHandle());
    return getUsage(this.nativeHandle_);
  }

  /**
   * Returns the memory size for the entries
   * being pinned in cache.
   *
   * @return cache pinned usage size.
   *
   */
  public long getPinnedUsage() {
    assert (isOwningHandle());
    return getPinnedUsage(this.nativeHandle_);
  }

  private static native long getUsage(final long handle);
  private static native long getPinnedUsage(final long handle);
}