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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;
import java.nio.ByteBuffer;
/**
* SstFileWriter is used to create sst files that can be added to the
* database later. All keys in files generated by SstFileWriter will have
* sequence number = 0.
*/
public class SstFileWriter extends RocksObject {
/**
* SstFileWriter Constructor.
*
* @param envOptions {@link org.rocksdb.EnvOptions} instance.
* @param options {@link org.rocksdb.Options} instance.
*/
public SstFileWriter(final EnvOptions envOptions, final Options options) {
super(newSstFileWriter(
envOptions.nativeHandle_, options.nativeHandle_));
}
/**
* Prepare SstFileWriter to write to a file.
*
* @param filePath the location of file
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void open(final String filePath) throws RocksDBException {
open(nativeHandle_, filePath);
}
/**
* Add a Put key with value to currently opened file.
*
* @param key the specified key to be inserted.
* @param value the value associated with the specified key.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void put(final Slice key, final Slice value) throws RocksDBException {
put(nativeHandle_, key.getNativeHandle(), value.getNativeHandle());
}
/**
* Add a Put key with value to currently opened file.
*
* @param key the specified key to be inserted.
* @param value the value associated with the specified key.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void put(final DirectSlice key, final DirectSlice value)
throws RocksDBException {
put(nativeHandle_, key.getNativeHandle(), value.getNativeHandle());
}
/**
* Add a Put key with value to currently opened file.
*
* @param key the specified key to be inserted.
* @param value the value associated with the specified key.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void put(final ByteBuffer key, final ByteBuffer value) throws RocksDBException {
assert key.isDirect() && value.isDirect();
putDirect(nativeHandle_, key, key.position(), key.remaining(), value, value.position(),
value.remaining());
key.position(key.limit());
value.position(value.limit());
}
/**
* Add a Put key with value to currently opened file.
*
* @param key the specified key to be inserted.
* @param value the value associated with the specified key.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void put(final byte[] key, final byte[] value) throws RocksDBException {
put(nativeHandle_, key, value);
}
/**
* Add a Merge key with value to currently opened file.
*
* @param key the specified key to be merged.
* @param value the value to be merged with the current value for
* the specified key.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void merge(final Slice key, final Slice value)
throws RocksDBException {
merge(nativeHandle_, key.getNativeHandle(), value.getNativeHandle());
}
/**
* Add a Merge key with value to currently opened file.
*
* @param key the specified key to be merged.
* @param value the value to be merged with the current value for
* the specified key.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void merge(final byte[] key, final byte[] value)
throws RocksDBException {
merge(nativeHandle_, key, value);
}
/**
* Add a Merge key with value to currently opened file.
*
* @param key the specified key to be merged.
* @param value the value to be merged with the current value for
* the specified key.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void merge(final DirectSlice key, final DirectSlice value)
throws RocksDBException {
merge(nativeHandle_, key.getNativeHandle(), value.getNativeHandle());
}
/**
* Add a deletion key to currently opened file.
*
* @param key the specified key to be deleted.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void delete(final Slice key) throws RocksDBException {
delete(nativeHandle_, key.getNativeHandle());
}
/**
* Add a deletion key to currently opened file.
*
* @param key the specified key to be deleted.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void delete(final DirectSlice key) throws RocksDBException {
delete(nativeHandle_, key.getNativeHandle());
}
/**
* Add a deletion key to currently opened file.
*
* @param key the specified key to be deleted.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void delete(final byte[] key) throws RocksDBException {
delete(nativeHandle_, key);
}
/**
* Finish the process and close the sst file.
*
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public void finish() throws RocksDBException {
finish(nativeHandle_);
}
/**
* Return the current file size.
*
* @return the current file size.
* @throws RocksDBException thrown if error happens in underlying
* native library.
*/
public long fileSize() throws RocksDBException {
return fileSize(nativeHandle_);
}
// (AP) Should we expose a constructor wrapping this ?
private static native long newSstFileWriter(final long envOptionsHandle, final long optionsHandle,
final long userComparatorHandle, final byte comparatorType);
private static native long newSstFileWriter(
final long envOptionsHandle, final long optionsHandle);
private static native void open(final long handle, final String filePath) throws RocksDBException;
private static native void put(final long handle, final long keyHandle, final long valueHandle)
throws RocksDBException;
private static native void put(final long handle, final byte[] key, final byte[] value)
throws RocksDBException;
private static native void putDirect(long handle, ByteBuffer key, int keyOffset, int keyLength,
ByteBuffer value, int valueOffset, int valueLength) throws RocksDBException;
private static native long fileSize(long handle) throws RocksDBException;
private static native void merge(final long handle, final long keyHandle, final long valueHandle)
throws RocksDBException;
private static native void merge(final long handle, final byte[] key, final byte[] value)
throws RocksDBException;
private static native void delete(final long handle, final long keyHandle)
throws RocksDBException;
private static native void delete(final long handle, final byte[] key) throws RocksDBException;
private static native void finish(final long handle) throws RocksDBException;
@Override
protected final void disposeInternal(final long handle) {
disposeInternalJni(handle);
}
private static native void disposeInternalJni(final long handle);
}
