75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
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// Copyright 2022, Roman Gershman. All rights reserved.
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// See LICENSE for licensing terms.
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//
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#pragma once
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extern "C" {
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#include "redis/lzfP.h"
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}
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#include "base/io_buf.h"
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#include "io/io.h"
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namespace dfly {
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class EngineShardSet;
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class EngineShard;
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class RdbSerializer {
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public:
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RdbSerializer(::io::Sink* s = nullptr);
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~RdbSerializer();
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// The ownership stays with the caller.
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void set_sink(::io::Sink* s) {
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sink_ = s;
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}
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std::error_code WriteOpcode(uint8_t opcode) {
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return WriteRaw(::io::Bytes{&opcode, 1});
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}
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std::error_code SaveKeyVal(std::string_view key, std::string_view value, uint64_t expire_ms);
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std::error_code WriteRaw(const ::io::Bytes& buf);
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std::error_code SaveString(std::string_view val);
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std::error_code SaveString(const uint8_t* buf, size_t len) {
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return SaveString(std::string_view{reinterpret_cast<const char*>(buf), len});
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}
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std::error_code SaveLen(size_t len);
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std::error_code FlushMem();
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private:
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std::error_code SaveLzfBlob(const ::io::Bytes& src, size_t uncompressed_len);
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::io::Sink* sink_ = nullptr;
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std::unique_ptr<LZF_HSLOT[]> lzf_;
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base::IoBuf mem_buf_;
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base::PODArray<uint8_t> tmp_buf_;
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};
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class RdbSaver {
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public:
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RdbSaver(EngineShardSet* ess, ::io::Sink* sink);
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~RdbSaver();
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std::error_code SaveHeader();
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std::error_code SaveEpilog();
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private:
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std::error_code SaveAux();
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std::error_code SaveAuxFieldStrStr(std::string_view key, std::string_view val);
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std::error_code SaveAuxFieldStrInt(std::string_view key, int64_t val);
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EngineShardSet* ess_;
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::io::Sink* sink_;
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RdbSerializer serializer_;
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};
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} // namespace dfly
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