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c7e31aff56
* Adds a cache for the most recently validated ledger state * Replaces the keys table with successor table * Adds support for ledger diffs in the database * Removes BackendIndexer
61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
#ifndef CLIO_SIMPLECACHE_H_INCLUDED
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#define CLIO_SIMPLECACHE_H_INCLUDED
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#include <ripple/basics/base_uint.h>
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#include <ripple/basics/hardened_hash.h>
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#include <backend/Types.h>
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#include <map>
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#include <mutex>
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#include <shared_mutex>
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#include <utility>
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#include <vector>
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namespace Backend {
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class SimpleCache
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{
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struct CacheEntry
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{
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uint32_t seq = 0;
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Blob blob;
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};
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std::map<ripple::uint256, CacheEntry> map_;
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mutable std::shared_mutex mtx_;
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uint32_t latestSeq_ = 0;
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std::atomic_bool full_ = false;
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// temporary set to prevent background thread from writing already deleted
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// data. not used when cache is full
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std::unordered_set<ripple::uint256, ripple::hardened_hash<>> deletes_;
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public:
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// Update the cache with new ledger objects
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// set isBackground to true when writing old data from a background thread
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void
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update(
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std::vector<LedgerObject> const& blobs,
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uint32_t seq,
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bool isBackground = false);
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std::optional<Blob>
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get(ripple::uint256 const& key, uint32_t seq) const;
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// always returns empty optional if isFull() is false
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std::optional<LedgerObject>
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getSuccessor(ripple::uint256 const& key, uint32_t seq) const;
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// always returns empty optional if isFull() is false
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std::optional<LedgerObject>
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getPredecessor(ripple::uint256 const& key, uint32_t seq) const;
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void
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setFull();
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// whether the cache has all data for the most recent ledger
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bool
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isFull();
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size_t
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size();
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};
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} // namespace Backend
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#endif
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