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137 lines
3.8 KiB
C++
137 lines
3.8 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef RIPPLE_NODESTORE_DATABASEROTATINGIMP_H_INCLUDED
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#define RIPPLE_NODESTORE_DATABASEROTATINGIMP_H_INCLUDED
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#include <ripple/nodestore/DatabaseRotating.h>
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namespace ripple {
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namespace 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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std::string const& name,
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Scheduler& scheduler,
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int readThreads,
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Stoppable& parent,
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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 threads before data members are destroyed.
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stopThreads();
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}
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void
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rotateWithLock(
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std::function<std::unique_ptr<NodeStore::Backend>(
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std::string const& writableBackendName)> const& 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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import(Database& source) override;
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void
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store(
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NodeObjectType type,
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Blob&& data,
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uint256 const& hash,
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std::uint32_t seq) override;
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std::shared_ptr<NodeObject>
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fetch(uint256 const& hash, std::uint32_t seq) override
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{
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return doFetch(hash, seq, *pCache_, *nCache_, false);
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}
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bool
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asyncFetch(
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uint256 const& hash,
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std::uint32_t seq,
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std::shared_ptr<NodeObject>& object) override;
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bool
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storeLedger(std::shared_ptr<Ledger const> const& srcLedger) override;
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int
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getDesiredAsyncReadCount(std::uint32_t seq) override
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{
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// We prefer a client not fill our cache
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// We don't want to push data out of the cache
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// before it's retrieved
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return pCache_->getTargetSize() / asyncDivider;
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}
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float
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getCacheHitRate() override
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{
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return pCache_->getHitRate();
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}
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void
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tune(int size, std::chrono::seconds age) override;
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void
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sweep() override;
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TaggedCache<uint256, NodeObject> const&
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getPositiveCache() override
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{
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return *pCache_;
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}
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private:
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// Positive cache
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std::shared_ptr<TaggedCache<uint256, NodeObject>> pCache_;
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// Negative cache
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std::shared_ptr<KeyCache<uint256>> nCache_;
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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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std::shared_ptr<NodeObject>
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fetchFrom(uint256 const& hash, std::uint32_t seq) override;
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void
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for_each(std::function<void(std::shared_ptr<NodeObject>)> f) override;
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};
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} // namespace NodeStore
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} // namespace ripple
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#endif
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