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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).
+//
+// This file implements the callback "bridge" between Java and C++ for
+// ROCKSDB_NAMESPACE::WriteBatch::Handler.
+
+#ifndef JAVA_ROCKSJNI_WRITEBATCHHANDLERJNICALLBACK_H_
+#define JAVA_ROCKSJNI_WRITEBATCHHANDLERJNICALLBACK_H_
+
+#include <functional>
+#include <jni.h>
+#include <memory>
+#include "rocksjni/jnicallback.h"
+#include "rocksdb/write_batch.h"
+
+namespace ROCKSDB_NAMESPACE {
+/**
+ * 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);
+ Status PutCF(uint32_t column_family_id, const Slice& key,
+ const Slice& value);
+ void Put(const Slice& key, const Slice& value);
+ Status MergeCF(uint32_t column_family_id, const Slice& key,
+ const Slice& value);
+ void Merge(const Slice& key, const Slice& value);
+ Status DeleteCF(uint32_t column_family_id, const Slice& key);
+ void Delete(const Slice& key);
+ Status SingleDeleteCF(uint32_t column_family_id, const Slice& key);
+ void SingleDelete(const Slice& key);
+ Status DeleteRangeCF(uint32_t column_family_id, const Slice& beginKey,
+ const Slice& endKey);
+ void DeleteRange(const Slice& beginKey, const Slice& endKey);
+ void LogData(const Slice& blob);
+ Status PutBlobIndexCF(uint32_t column_family_id, const Slice& key,
+ const Slice& value);
+ Status MarkBeginPrepare(bool);
+ Status MarkEndPrepare(const Slice& xid);
+ Status MarkNoop(bool empty_batch);
+ Status MarkRollback(const Slice& xid);
+ Status MarkCommit(const Slice& xid);
+ bool Continue();
+
+ private:
+ JNIEnv* m_env;
+ jmethodID m_jPutCfMethodId;
+ jmethodID m_jPutMethodId;
+ jmethodID m_jMergeCfMethodId;
+ jmethodID m_jMergeMethodId;
+ jmethodID m_jDeleteCfMethodId;
+ jmethodID m_jDeleteMethodId;
+ jmethodID m_jSingleDeleteCfMethodId;
+ jmethodID m_jSingleDeleteMethodId;
+ jmethodID m_jDeleteRangeCfMethodId;
+ jmethodID m_jDeleteRangeMethodId;
+ jmethodID m_jLogDataMethodId;
+ jmethodID m_jPutBlobIndexCfMethodId;
+ jmethodID m_jMarkBeginPrepareMethodId;
+ jmethodID m_jMarkEndPrepareMethodId;
+ jmethodID m_jMarkNoopMethodId;
+ jmethodID m_jMarkRollbackMethodId;
+ jmethodID m_jMarkCommitMethodId;
+ jmethodID m_jContinueMethodId;
+ /**
+ * @return A pointer to a ROCKSDB_NAMESPACE::Status or nullptr if an
+ * unexpected exception occurred
+ */
+ std::unique_ptr<ROCKSDB_NAMESPACE::Status> kv_op(
+ const Slice& key, const Slice& value,
+ std::function<void(jbyteArray, jbyteArray)> kvFn);
+ /**
+ * @return A pointer to a ROCKSDB_NAMESPACE::Status or nullptr if an
+ * unexpected exception occurred
+ */
+ std::unique_ptr<ROCKSDB_NAMESPACE::Status> k_op(
+ const Slice& key, std::function<void(jbyteArray)> kFn);
+};
+} // namespace ROCKSDB_NAMESPACE
+
+#endif // JAVA_ROCKSJNI_WRITEBATCHHANDLERJNICALLBACK_H_