fork of https://github.com/rust-rocksdb/rust-rocksdb for nextgraph
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92 lines
3.4 KiB
92 lines
3.4 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// This file implements the callback "bridge" between Java and C++ for
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// ROCKSDB_NAMESPACE::WriteBatch::Handler.
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#ifndef JAVA_ROCKSJNI_WRITEBATCHHANDLERJNICALLBACK_H_
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#define JAVA_ROCKSJNI_WRITEBATCHHANDLERJNICALLBACK_H_
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#include <jni.h>
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#include <functional>
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#include <memory>
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#include "rocksdb/write_batch.h"
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#include "rocksjni/jnicallback.h"
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namespace ROCKSDB_NAMESPACE {
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/**
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* This class acts as a bridge between C++
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* and Java. The methods in this class will be
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* called back from the RocksDB storage engine (C++)
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* which calls the appropriate Java method.
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* This enables Write Batch Handlers to be implemented in Java.
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*/
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class WriteBatchHandlerJniCallback : public JniCallback,
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public WriteBatch::Handler {
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public:
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WriteBatchHandlerJniCallback(JNIEnv* env, jobject jWriteBackHandler);
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Status PutCF(uint32_t column_family_id, const Slice& key, const Slice& value);
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void Put(const Slice& key, const Slice& value);
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Status MergeCF(uint32_t column_family_id, const Slice& key,
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const Slice& value);
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void Merge(const Slice& key, const Slice& value);
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Status DeleteCF(uint32_t column_family_id, const Slice& key);
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void Delete(const Slice& key);
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Status SingleDeleteCF(uint32_t column_family_id, const Slice& key);
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void SingleDelete(const Slice& key);
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Status DeleteRangeCF(uint32_t column_family_id, const Slice& beginKey,
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const Slice& endKey);
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void DeleteRange(const Slice& beginKey, const Slice& endKey);
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void LogData(const Slice& blob);
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Status PutBlobIndexCF(uint32_t column_family_id, const Slice& key,
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const Slice& value);
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Status MarkBeginPrepare(bool);
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Status MarkEndPrepare(const Slice& xid);
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Status MarkNoop(bool empty_batch);
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Status MarkRollback(const Slice& xid);
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Status MarkCommit(const Slice& xid);
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Status MarkCommitWithTimestamp(const Slice& xid, const Slice& commit_ts);
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bool Continue();
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private:
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JNIEnv* m_env;
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jmethodID m_jPutCfMethodId;
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jmethodID m_jPutMethodId;
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jmethodID m_jMergeCfMethodId;
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jmethodID m_jMergeMethodId;
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jmethodID m_jDeleteCfMethodId;
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jmethodID m_jDeleteMethodId;
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jmethodID m_jSingleDeleteCfMethodId;
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jmethodID m_jSingleDeleteMethodId;
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jmethodID m_jDeleteRangeCfMethodId;
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jmethodID m_jDeleteRangeMethodId;
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jmethodID m_jLogDataMethodId;
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jmethodID m_jPutBlobIndexCfMethodId;
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jmethodID m_jMarkBeginPrepareMethodId;
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jmethodID m_jMarkEndPrepareMethodId;
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jmethodID m_jMarkNoopMethodId;
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jmethodID m_jMarkRollbackMethodId;
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jmethodID m_jMarkCommitMethodId;
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jmethodID m_jMarkCommitWithTimestampMethodId;
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jmethodID m_jContinueMethodId;
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/**
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* @return A pointer to a ROCKSDB_NAMESPACE::Status or nullptr if an
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* unexpected exception occurred
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*/
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std::unique_ptr<ROCKSDB_NAMESPACE::Status> kv_op(
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const Slice& key, const Slice& value,
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std::function<void(jbyteArray, jbyteArray)> kvFn);
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/**
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* @return A pointer to a ROCKSDB_NAMESPACE::Status or nullptr if an
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* unexpected exception occurred
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*/
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std::unique_ptr<ROCKSDB_NAMESPACE::Status> k_op(
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const Slice& key, std::function<void(jbyteArray)> kFn);
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};
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} // namespace ROCKSDB_NAMESPACE
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#endif // JAVA_ROCKSJNI_WRITEBATCHHANDLERJNICALLBACK_H_
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