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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.

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// 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;

/**
 * A RocksEnv is an interface used by the rocksdb implementation to access
 * operating system functionality like the filesystem etc.
 *
 * All Env implementations are safe for concurrent access from
 * multiple threads without any external synchronization.
 */
public class RocksEnv extends Env {

  /**
   * Package-private constructor that uses the specified native handle
   * to construct a RocksEnv.
   *
   * Note that the ownership of the input handle
   * belongs to the caller, and the newly created RocksEnv will not take
   * the ownership of the input handle.  As a result, calling
   * {@code dispose()} of the created RocksEnv will be no-op.
   */
  RocksEnv(final long handle) {
    super(handle);
  }

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