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98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
#pragma once
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#include <xrpl/basics/Blob.h>
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#include <xrpl/basics/base_uint.h>
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#include <xrpl/beast/utility/Journal.h>
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#include <xrpl/nodestore/Backend.h>
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#include <xrpl/nodestore/Database.h>
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#include <xrpl/nodestore/DatabaseRotating.h>
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#include <xrpl/nodestore/NodeObject.h>
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#include <xrpl/nodestore/Scheduler.h>
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#include <atomic>
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#include <cstdint>
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#include <functional>
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#include <memory>
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#include <mutex>
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#include <string>
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namespace xrpl::NodeStore {
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class DatabaseRotatingImp : public DatabaseRotating
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{
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public:
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DatabaseRotatingImp() = delete;
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DatabaseRotatingImp(DatabaseRotatingImp const&) = delete;
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DatabaseRotatingImp&
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operator=(DatabaseRotatingImp const&) = delete;
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DatabaseRotatingImp(
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Scheduler& scheduler,
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int readThreads,
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std::shared_ptr<Backend> writableBackend,
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std::shared_ptr<Backend> archiveBackend,
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Section const& config,
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beast::Journal j);
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~DatabaseRotatingImp() override
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{
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stop();
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}
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void
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rotate(
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std::unique_ptr<NodeStore::Backend>&& newBackend,
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std::function<void(std::string const& writableName, std::string const& archiveName)> const&
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f) override;
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std::string
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getName() const override;
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std::int32_t
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getWriteLoad() const override;
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void
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importDatabase(Database& source) override;
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bool
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isSameDB(std::uint32_t, std::uint32_t) override
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{
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// rotating store acts as one logical database
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return true;
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}
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void
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store(NodeObjectType type, Blob&& data, uint256 const& hash, std::uint32_t) override;
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void
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sync() override;
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void
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sweep() override;
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void
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setRotationInFlight(bool inFlight) override;
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private:
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std::shared_ptr<Backend> writableBackend_;
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std::shared_ptr<Backend> archiveBackend_;
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mutable std::mutex mutex_;
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// True between SHAMapStore starting the cache-freshen phase and the
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// completion of rotate(). While true, archive hits on ordinary
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// (duplicate == false) fetches are copied forward into the writable
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// backend; copyForwardCount_ tallies them per rotation for the
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// summary line logged at swap.
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std::atomic<bool> rotationInFlight_{false};
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std::atomic<std::uint64_t> copyForwardCount_{0};
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std::shared_ptr<NodeObject>
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fetchNodeObject(uint256 const& hash, std::uint32_t, FetchReport& fetchReport, bool duplicate)
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override;
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void
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forEach(std::function<void(std::shared_ptr<NodeObject>)> f) override;
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};
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} // namespace xrpl::NodeStore
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