68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
#pragma once
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#include "logging/loggable.hpp"
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#include "storage/indexes/index_update.hpp"
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#include "transactions/transaction.hpp"
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class Db;
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class DbAccessor;
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class SnapshotEncoder;
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using index_updates_t = std::vector<IndexUpdate>;
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// Inner structures local to transaction can hold ref to this structure and use
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// its methods.
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// Also serves as a barrier for calling methods defined public but meant for
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// internal use. That kind of method should request DbTransaction&.
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class DbTransaction : public Loggable
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{
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friend DbAccessor;
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public:
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DbTransaction() = delete;
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~DbTransaction() = default;
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DbTransaction(const DbTransaction& other) = delete;
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DbTransaction(DbTransaction&& other) = default;
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DbTransaction &operator=(const DbTransaction &) = delete;
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DbTransaction &operator=(DbTransaction &&) = default;
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DbTransaction(Db &db);
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DbTransaction(Db &db, tx::Transaction &trans)
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: Loggable("DbTransaction"), db(db), trans(trans) {}
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// Global transactional algorithms,operations and general methods meant for
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// internal use should be here or should be routed through this object.
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// This should provide cleaner hierarchy of operations on database.
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// For example cleaner.
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// Cleans edge part of database. MUST be called by one cleaner thread at
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// one time.
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// TODO: Should be exctracted to separate class which can enforce one thread
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// at atime.
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void clean_edge_section();
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// Cleans vertex part of database. MUST be called by one cleaner thread at
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// one time..
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// TODO: Should be exctracted to separate class which can enforce one thread
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// at atime.
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void clean_vertex_section();
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// Updates indexes of Vertex/Edges in index_updates. True if indexes are
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// updated successfully. False means that transaction failed.
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// TODO: Should be moved to Indexes class where it will this DbTransaction
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// as an argument.
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bool update_indexes();
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// Will update indexes for given element TG::record_t. Actual update happens
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// with call update_indexes
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template <class TG>
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void to_update_index(typename TG::vlist_t *vlist,
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typename TG::record_t *record);
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index_updates_t index_updates;
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Db &db;
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tx::Transaction &trans;
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};
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