5130ca8843
Enable `PRAGMA auto_vacuum = INCREMENTAL`, and perform a `PRAGMA incremental_vacuum` when deleting an offline region.
113 lines
3.3 KiB
C++
113 lines
3.3 KiB
C++
#ifndef MBGL_OFFLINE_DATABASE
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#define MBGL_OFFLINE_DATABASE
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#include <mbgl/storage/resource.hpp>
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#include <mbgl/storage/offline.hpp>
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#include <mbgl/util/noncopyable.hpp>
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#include <mbgl/util/optional.hpp>
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#include <mbgl/util/constants.hpp>
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#include <mbgl/util/mapbox.hpp>
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#include <unordered_map>
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#include <memory>
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#include <string>
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namespace mapbox {
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namespace sqlite {
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class Database;
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class Statement;
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}
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}
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namespace mbgl {
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class Response;
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class TileID;
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class OfflineDatabase : private util::noncopyable {
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public:
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// Limits affect ambient caching (put) only; resources required by offline
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// regions are exempt.
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OfflineDatabase(const std::string& path,
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uint64_t maximumCacheSize = util::DEFAULT_MAX_CACHE_SIZE);
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~OfflineDatabase();
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optional<Response> get(const Resource&);
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// Return value is (inserted, stored size)
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std::pair<bool, uint64_t> put(const Resource&, const Response&);
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std::vector<OfflineRegion> listRegions();
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OfflineRegion createRegion(const OfflineRegionDefinition&,
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const OfflineRegionMetadata&);
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void deleteRegion(OfflineRegion&&);
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// Return value is (response, stored size)
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optional<std::pair<Response, uint64_t>> getRegionResource(int64_t regionID, const Resource&);
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uint64_t putRegionResource(int64_t regionID, const Resource&, const Response&);
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OfflineRegionDefinition getRegionDefinition(int64_t regionID);
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OfflineRegionStatus getRegionCompletedStatus(int64_t regionID);
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void setOfflineMapboxTileCountLimit(uint64_t);
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uint64_t getOfflineMapboxTileCountLimit();
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bool offlineMapboxTileCountLimitExceeded();
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uint64_t getOfflineMapboxTileCount();
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private:
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void connect(int flags);
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int userVersion();
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void ensureSchema();
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void removeExisting();
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void migrateToVersion3();
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class Statement {
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public:
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explicit Statement(mapbox::sqlite::Statement& stmt_) : stmt(stmt_) {}
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Statement(Statement&&) = default;
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Statement(const Statement&) = delete;
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~Statement();
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mapbox::sqlite::Statement* operator->() { return &stmt; };
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private:
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mapbox::sqlite::Statement& stmt;
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};
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Statement getStatement(const char *);
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optional<std::pair<Response, uint64_t>> getTile(const Resource::TileData&);
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bool putTile(const Resource::TileData&, const Response&,
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const std::string&, bool compressed);
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optional<std::pair<Response, uint64_t>> getResource(const Resource&);
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bool putResource(const Resource&, const Response&,
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const std::string&, bool compressed);
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optional<std::pair<Response, uint64_t>> getInternal(const Resource&);
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std::pair<bool, uint64_t> putInternal(const Resource&, const Response&, bool evict);
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// Return value is true iff the resource was previously unused by any other regions.
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bool markUsed(int64_t regionID, const Resource&);
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const std::string path;
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std::unique_ptr<::mapbox::sqlite::Database> db;
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std::unordered_map<const char *, std::unique_ptr<::mapbox::sqlite::Statement>> statements;
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template <class T>
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T getPragma(const char *);
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uint64_t maximumCacheSize;
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uint64_t offlineMapboxTileCountLimit = util::mapbox::DEFAULT_OFFLINE_TILE_COUNT_LIMIT;
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optional<uint64_t> offlineMapboxTileCount;
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bool evict(uint64_t neededFreeSize);
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};
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} // namespace mbgl
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#endif
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