132 lines
4.1 KiB
C++
132 lines
4.1 KiB
C++
#include "rocksdb/merge_operator.h"
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using std::string;
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using std::deque;
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using rocksdb::Slice;
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using rocksdb::Logger;
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using rocksdb::MergeOperator;
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using rocksdb::AssociativeMergeOperator;
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namespace py_rocks {
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class AssociativeMergeOperatorWrapper: public AssociativeMergeOperator {
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public:
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typedef bool (*merge_func)(
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void*,
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const Slice& key,
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const Slice* existing_value,
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const Slice& value,
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std::string* new_value,
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Logger* logger);
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AssociativeMergeOperatorWrapper(
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string name,
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void* merge_context,
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merge_func merge_callback):
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name(name),
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merge_context(merge_context),
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merge_callback(merge_callback)
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{}
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virtual bool Merge(
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const Slice& key,
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const Slice* existing_value,
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const Slice& value,
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std::string* new_value,
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Logger* logger) const
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{
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return this->merge_callback(
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this->merge_context,
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key,
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existing_value,
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value,
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new_value,
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logger);
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}
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virtual const char* Name() const {
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return this->name.c_str();
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}
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private:
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string name;
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void* merge_context;
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merge_func merge_callback;
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};
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class MergeOperatorWrapper: public MergeOperator {
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public:
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typedef bool (*full_merge_func)(
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void* ctx,
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const Slice& key,
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const Slice* existing_value,
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const deque<string>& operand_list,
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string* new_value,
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Logger* logger);
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typedef bool (*partial_merge_func)(
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void* ctx,
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const Slice& key,
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const Slice& left_op,
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const Slice& right_op,
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string* new_value,
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Logger* logger);
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MergeOperatorWrapper(
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string name,
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void* full_merge_context,
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void* partial_merge_context,
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full_merge_func full_merge_callback,
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partial_merge_func partial_merge_callback):
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name(name),
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full_merge_context(full_merge_context),
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partial_merge_context(partial_merge_context),
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full_merge_callback(full_merge_callback),
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partial_merge_callback(partial_merge_callback)
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{}
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virtual bool FullMerge(
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const Slice& key,
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const Slice* existing_value,
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const deque<string>& operand_list,
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string* new_value,
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Logger* logger) const
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{
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return this->full_merge_callback(
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this->full_merge_context,
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key,
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existing_value,
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operand_list,
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new_value,
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logger);
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}
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virtual bool PartialMerge (
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const Slice& key,
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const Slice& left_operand,
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const Slice& right_operand,
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string* new_value,
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Logger* logger) const
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{
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return this->partial_merge_callback(
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this->partial_merge_context,
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key,
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left_operand,
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right_operand,
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new_value,
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logger);
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}
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virtual const char* Name() const {
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return this->name.c_str();
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}
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private:
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string name;
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void* full_merge_context;
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void* partial_merge_context;
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full_merge_func full_merge_callback;
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partial_merge_func partial_merge_callback;
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};
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}
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