mirror of https://github.com/facebook/rocksdb.git
96 lines
3.2 KiB
C++
96 lines
3.2 KiB
C++
// 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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#pragma once
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#include <string>
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#include "db/table_properties_collector.h"
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#include "rocksdb/types.h"
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#include "util/coding.h"
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#include "util/string_util.h"
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namespace ROCKSDB_NAMESPACE {
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// Table Properties that are specific to tables created by SstFileWriter.
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struct ExternalSstFilePropertyNames {
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// value of this property is a fixed uint32 number.
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static const std::string kVersion;
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// value of this property is a fixed uint64 number.
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static const std::string kGlobalSeqno;
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};
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// PropertiesCollector used to add properties specific to tables
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// generated by SstFileWriter
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class SstFileWriterPropertiesCollector : public IntTblPropCollector {
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public:
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explicit SstFileWriterPropertiesCollector(int32_t version,
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SequenceNumber global_seqno)
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: version_(version), global_seqno_(global_seqno) {}
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virtual Status InternalAdd(const Slice& /*key*/, const Slice& /*value*/,
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uint64_t /*file_size*/) override {
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// Intentionally left blank. Have no interest in collecting stats for
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// individual key/value pairs.
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return Status::OK();
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}
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virtual void BlockAdd(uint64_t /* block_raw_bytes */,
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uint64_t /* block_compressed_bytes_fast */,
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uint64_t /* block_compressed_bytes_slow */) override {
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// Intentionally left blank. No interest in collecting stats for
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// blocks.
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return;
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}
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virtual Status Finish(UserCollectedProperties* properties) override {
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// File version
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std::string version_val;
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PutFixed32(&version_val, static_cast<uint32_t>(version_));
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properties->insert({ExternalSstFilePropertyNames::kVersion, version_val});
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// Global Sequence number
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std::string seqno_val;
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PutFixed64(&seqno_val, static_cast<uint64_t>(global_seqno_));
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properties->insert({ExternalSstFilePropertyNames::kGlobalSeqno, seqno_val});
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return Status::OK();
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}
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virtual const char* Name() const override {
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return "SstFileWriterPropertiesCollector";
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}
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virtual UserCollectedProperties GetReadableProperties() const override {
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return {{ExternalSstFilePropertyNames::kVersion, ToString(version_)}};
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}
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private:
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int32_t version_;
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SequenceNumber global_seqno_;
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};
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class SstFileWriterPropertiesCollectorFactory
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: public IntTblPropCollectorFactory {
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public:
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explicit SstFileWriterPropertiesCollectorFactory(int32_t version,
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SequenceNumber global_seqno)
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: version_(version), global_seqno_(global_seqno) {}
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virtual IntTblPropCollector* CreateIntTblPropCollector(
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uint32_t /*column_family_id*/, int /* level_at_creation */) override {
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return new SstFileWriterPropertiesCollector(version_, global_seqno_);
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}
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virtual const char* Name() const override {
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return "SstFileWriterPropertiesCollector";
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}
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private:
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int32_t version_;
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SequenceNumber global_seqno_;
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};
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} // namespace ROCKSDB_NAMESPACE
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