rocksdb/java/rocksjni/writebatchhandlerjnicallback.h
Adam Retter 560e984995 Added CompactionFilterFactory support to RocksJava
Summary:
This PR also includes some cleanup, bugfixes and refactoring of the Java API. However these are really pre-cursors on the road to CompactionFilterFactory support.
Closes https://github.com/facebook/rocksdb/pull/1241

Differential Revision: D6012778

Pulled By: sagar0

fbshipit-source-id: 0774465940ee99001a78906e4fed4ef57068ad5c
2017-10-12 11:12:16 -07:00

48 lines
1.6 KiB
C++

// 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).
//
// This file implements the callback "bridge" between Java and C++ for
// rocksdb::WriteBatch::Handler.
#ifndef JAVA_ROCKSJNI_WRITEBATCHHANDLERJNICALLBACK_H_
#define JAVA_ROCKSJNI_WRITEBATCHHANDLERJNICALLBACK_H_
#include <jni.h>
#include "rocksjni/jnicallback.h"
#include "rocksdb/write_batch.h"
namespace rocksdb {
/**
* This class acts as a bridge between C++
* and Java. The methods in this class will be
* called back from the RocksDB storage engine (C++)
* which calls the appropriate Java method.
* This enables Write Batch Handlers to be implemented in Java.
*/
class WriteBatchHandlerJniCallback : public JniCallback, public WriteBatch::Handler {
public:
WriteBatchHandlerJniCallback(
JNIEnv* env, jobject jWriteBackHandler);
void Put(const Slice& key, const Slice& value);
void Merge(const Slice& key, const Slice& value);
void Delete(const Slice& key);
void DeleteRange(const Slice& beginKey, const Slice& endKey);
void LogData(const Slice& blob);
bool Continue();
private:
JNIEnv* m_env;
jbyteArray sliceToJArray(const Slice& s);
jmethodID m_jPutMethodId;
jmethodID m_jMergeMethodId;
jmethodID m_jDeleteMethodId;
jmethodID m_jDeleteRangeMethodId;
jmethodID m_jLogDataMethodId;
jmethodID m_jContinueMethodId;
};
} // namespace rocksdb
#endif // JAVA_ROCKSJNI_WRITEBATCHHANDLERJNICALLBACK_H_