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85a84b0794
Classes reading and writing to the data heap would communicate directly with the Heap object, and transfer ByteBuffers back and forth with it. This makes things like caching and locking hard. Therefore all data persistence activity will be funneled through a Serializer object which in turn submits it to the Heap. Introducing this unfortunately resulted in a huge amount of churn, in which a number of smaller refactorings got caught up as well.
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
/*
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* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/RefPtr.h>
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#include <AK/String.h>
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#include <LibCore/Object.h>
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#include <LibSQL/Forward.h>
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#include <LibSQL/Heap.h>
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#include <LibSQL/Meta.h>
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namespace SQL {
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/**
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* A Database object logically connects a Heap with the SQL data we want
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* to store in it. It has BTree pointers for B-Trees holding the definitions
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* of tables, columns, indexes, and other SQL objects.
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*/
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class Database : public Core::Object {
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C_OBJECT(Database);
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public:
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explicit Database(String);
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~Database() override = default;
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void commit() { m_heap->flush(); }
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void add_schema(SchemaDef const&);
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static Key get_schema_key(String const&);
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RefPtr<SchemaDef> get_schema(String const&);
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void add_table(TableDef& table);
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static Key get_table_key(String const&, String const&);
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RefPtr<TableDef> get_table(String const&, String const&);
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Vector<Row> select_all(TableDef const&);
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Vector<Row> match(TableDef const&, Key const&);
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bool insert(Row&);
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bool update(Row&);
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private:
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NonnullRefPtr<Heap> m_heap;
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Serializer m_serializer;
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RefPtr<BTree> m_schemas;
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RefPtr<BTree> m_tables;
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RefPtr<BTree> m_table_columns;
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HashMap<u32, RefPtr<SchemaDef>> m_schema_cache;
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HashMap<u32, RefPtr<TableDef>> m_table_cache;
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};
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}
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