TCSystemCS/MetaDataDB/DB2Instance.cs at develop · tgoessler/TCSystemCS · GitHub

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// *******************************************************************************

// ******* *** *** *

// * * * *

// * * * *****

// * * *** * * ** * ** ***

// * * * * * * * **** * * *

// * * * * * * * * * * *

// * *** *** * ** ** ** * *

// *

// *******************************************************************************

// see https://github.com/tgoessler/TCSystemCS for details.

// *******************************************************************************

// TCSystem is the legal property of its developers.

// Please refer to the COPYRIGHT file distributed with this source distribution.

// *******************************************************************************

#region Usings

using System;

using System.Collections.Generic;

using Microsoft.Data.Sqlite;

using TCSystem.MetaData;

#endregion

namespace TCSystem.MetaDataDB;

internal sealed class DB2Instance : DB2Constants

{

#region Public

public DB2Instance(string fileName, bool readOnly)

: this(fileName, readOnly, false)

{

try

{

Log.Instance.Info($"Open Database '{fileName}:readOnly={readOnly}'");

AppContext.SetSwitch("Microsoft.Data.Sqlite.Pre10TimeZoneHandling", isEnabled: true);

_fileName = fileName;

ReadOnly = readOnly;

CreateConnection();

if (readOnly)

{

ReadDbVersion();

}

else

{

CreateTableIndex();

ReadDbVersion();

using (SqliteTransaction transaction = WriteDbVersion())

{

CreateTableFiles(transaction);

CreateTablePersons(transaction);

CreateTableTags(transaction);

CreateTableLocation(transaction);

CreateTableFileData(transaction);

CreateTableFileFaces(transaction);

CreateTableFileTags(transaction);

CreateTableFileLocation(transaction);

CreateTableNotThisPerson(transaction);

transaction.Commit();

}

Log.Instance.Info($"Open Database '{fileName}:readOnly={readOnly}' done.");

}

catch (Exception e)

{

Log.Instance.Fatal($"Failed open DB {fileName}:readOnly={readOnly}", e);

throw;

}

public void Close()

{

DestroyConnection();

}

public DB2Instance Clone()

{

return new(_fileName, ReadOnly, Version, UnsafeModeEnabled);

}

public SqliteTransaction BeginTransaction()

{

_numTransactions++;

if (_numTransactions % 100 == 99 && !UnsafeModeEnabled)

{

Log.Instance.Info("Reopening Database");

DestroyConnection();

CreateConnection();

}

return Connection.BeginTransaction();

}

public void EnableUnsafeMode()

{

if (!UnsafeModeEnabled)

{

UnsafeModeEnabled = true;

DestroyConnection();

CreateConnection();

}

public void EnableDefaultMode()

{

if (UnsafeModeEnabled)

{

UnsafeModeEnabled = false;

DestroyConnection();

CreateConnection();

if (!ReadOnly)

{

VacuumDb();

}

public SqliteConnection Connection { get; private set; }

public string Version { get; private set; }

public bool ReadOnly { get; }

public bool UnsafeModeEnabled { get; private set; }

public DB2Data Data { get; }

public DB2Files Files { get; }

public DB2Locations Locations { get; }

public DB2Persons Persons { get; }

public DB2Tags Tags { get; }

public DB2NotThisPerson NotThisPerson { get; }

#endregion

#region Private

private DB2Instance(string fileName, bool readOnly, bool unsafeModeEnabled)

{

_fileName = fileName;

UnsafeModeEnabled = unsafeModeEnabled;

ReadOnly = readOnly;

Data = new(this);

Files = new(this);

Locations = new(this);

Persons = new(this);

Tags = new(this);

NotThisPerson = new(this);

}

private DB2Instance(string fileName, bool readOnly, string version, bool unsafeModeEnabled)

: this(fileName, readOnly, unsafeModeEnabled)

{

Version = version;

CreateConnection();

}

private void CreateConnection()

{

try

{

var builder = new SqliteConnectionStringBuilder

{

DataSource = _fileName,

Mode = ReadOnly ? SqliteOpenMode.ReadOnly : SqliteOpenMode.ReadWriteCreate

};

Log.Instance.Info($"Creating connection {builder.ConnectionString}");

Connection = new(builder.ConnectionString);

Connection.Open();

ApplyDbSetting();

}

catch (Exception e)

{

Log.Instance.Fatal($"Creating connection {_fileName}' failed", e);

Connection = null;

}

if (Connection == null)

{

Log.Instance.Fatal($"Creating connection {_fileName}' failed");

throw new InvalidProgramException($"Open connection '{_fileName}' failed");

}

Log.Instance.Info("Creating connection done");

}

private void ApplyDbSetting()

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

if (UnsafeModeEnabled)

{

command.CommandText += "PRAGMA synchronous = OFF;";

}

else

{

command.CommandText += "PRAGMA synchronous = NORMAL;";

}

const int size = 1024 * 1024 * 100;

command.CommandText += $"PRAGMA cache_size = {size};";

command.CommandText += "PRAGMA temp_store = MEMORY;";

command.CommandText += "PRAGMA locking_mode = NORMAL;";

if (!ReadOnly)

{

command.CommandText += "PRAGMA journal_mode = WAL;";

}

command.ExecuteNonQuery();

}

private void DestroyConnection()

{

if (Connection != null)

{

Log.Instance.Info("Destroying connection");

SqliteConnection.ClearPool(Connection);

Connection.Close();

Connection.Dispose();

Connection = null;

Log.Instance.Info("Destroying connection done");

}

private void CreateTableFileTags(SqliteTransaction transaction)

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE TABLE IF NOT EXISTS {TableFileTags}" +

"( " +

$"{IdFileId} REFERENCES {TableFiles}({IdFileId}) ON DELETE CASCADE, " +

$"{IdTagId} INTEGER NOT NULL REFERENCES {TableTags}({IdTagId}) ON DELETE CASCADE" +

");";

command.ExecuteNonQuery();

}

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE INDEX IF NOT EXISTS index_fileid_to_tags ON {TableFileTags}({IdFileId});";

command.ExecuteNonQuery();

}

private void CreateTableFileLocation(SqliteTransaction transaction)

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE TABLE IF NOT EXISTS {TableFileLocations}" +

"( " +

$"{IdFileId} REFERENCES {TableFiles}({IdFileId}) ON DELETE CASCADE, " +

$"{IdLocationId} INTEGER NOT NULL, " +

$"{IdLatitude} TEXT, " +

$"{IdLongitude} TEXT, " +

$"{IdAltitude} TEXT " +

");";

command.ExecuteNonQuery();

}

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE INDEX IF NOT EXISTS index_fileid_to_locations ON {TableFileLocations}({IdFileId});";

command.ExecuteNonQuery();

}

private void CreateTableNotThisPerson(SqliteTransaction transaction)

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE TABLE IF NOT EXISTS {TableNotThisPerson} " +

"( " +

$"{IdFaceId} REFERENCES {TableFileFaces}({IdFaceId}) ON DELETE CASCADE, " +

$"{IdPersonId} REFERENCES {TablePersons}({IdPersonId}) ON DELETE CASCADE" +

");";

command.ExecuteNonQuery();

}

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE INDEX IF NOT EXISTS index_fileid_to_tags ON {TableFileTags}({IdFileId});";

command.ExecuteNonQuery();

}

private void ReadDbVersion()

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.CommandText = $"SELECT {IdValue} FROM {TableKeyValues} WHERE {IdKey}='Version';";

Version = null;

try

{

Version = command.ExecuteScalar() as string;

}

catch (Exception)

{

// no version until now written

}

private void CreateTableIndex()

{

using (SqliteTransaction transaction = BeginTransaction())

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText =

$"CREATE TABLE IF NOT EXISTS {TableKeyValues}({IdKey} TEXT NOT NULL UNIQUE, {IdValue} TEXT NOT NULL);";

command.ExecuteNonQuery();

}

transaction.Commit();

}

private void CreateTableFiles(SqliteTransaction transaction)

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE TABLE IF NOT EXISTS {TableFiles}" +

"( " +

$"{IdFileId} INTEGER PRIMARY KEY, " +

$"{IdFileName} TEXT NOT NULL UNIQUE, " +

$"{IdDateModified} TEXT, " +

$"{IdProcessingInfo} INTEGER" +

");";

command.ExecuteNonQuery();

}

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE UNIQUE INDEX IF NOT EXISTS index_filename_to_fileid ON {TableFiles} ({IdFileName});";

command.ExecuteNonQuery();

}

private void CreateTableFileData(SqliteTransaction transaction)

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE TABLE IF NOT EXISTS {TableFileData} " +

"( " +

$"{IdFileId} REFERENCES {TableFiles}({IdFileId}) ON DELETE CASCADE, " +

$"{IdWidth} INTEGER, " +

$"{IdHeight} INTEGER, " +

$"{IdOrientation} INTEGER, " +

$"{IdDateTaken} TEXT" +

");";

command.ExecuteNonQuery();

}

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE UNIQUE INDEX IF NOT EXISTS index_fileid_to_data ON {TableFileData}({IdFileId});";

command.ExecuteNonQuery();

}

private void CreateTablePersons(SqliteTransaction transaction)

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE TABLE IF NOT EXISTS {TablePersons}" +

"( " +

$"{IdPersonId} INTEGER PRIMARY KEY, " +

$"{IdName} TEXT NOT NULL UNIQUE, " +

$"{IdEmailDigest} TEXT, " +

$"{IdLiveId} TEXT, " +

$"{IdSourceId} TEXT " +

");";

command.ExecuteNonQuery();

}

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = "CREATE UNIQUE INDEX IF NOT EXISTS index_name_to_person_id ON " + TablePersons + "(Name);";

command.ExecuteNonQuery();

}

private void CreateTableFileFaces(SqliteTransaction transaction)

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE TABLE IF NOT EXISTS {TableFileFaces}" +

"( " +

$"{IdFaceId} INTEGER PRIMARY KEY, " +

$"{IdFileId} REFERENCES {TableFiles}({IdFileId}) ON DELETE CASCADE, " +

$"{IdPersonId} INTEGER, " +

$"{IdRectangleX} INTEGER, " +

$"{IdRectangleY} INTEGER, " +

$"{IdRectangleW} INTEGER, " +

$"{IdRectangleH} INTEGER, " +

$"{IdFaceMode} INTEGER DEFAULT {(int)FaceMode.Undefined}, " +

$"{IdFaceQuality} INTEGER DEFAULT {(int)FaceQuality.Normal}, " +

$"{IdVisible} INTEGER DEFAULT 1, " +

$"{IdFaceDescriptor} BLOB " +

");";

command.ExecuteNonQuery();

}

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE INDEX IF NOT EXISTS index_fileid_to_faces ON {TableFileFaces}({IdFileId});";

command.ExecuteNonQuery();

}

private void CreateTableTags(SqliteTransaction transaction)

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE TABLE IF NOT EXISTS {TableTags}" +

"(" +

$"{IdTagId} INTEGER PRIMARY KEY, " +

$"{IdTag} TEXT" +

");";

command.ExecuteNonQuery();

}

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE UNIQUE INDEX IF NOT EXISTS index_tag_to_tag_id ON {TableTags}({IdTag});";

command.ExecuteNonQuery();

}

private void CreateTableLocation(SqliteTransaction transaction)

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = $"CREATE TABLE IF NOT EXISTS {TableLocations} " +

"( " +

$"{IdLocationId} INTEGER PRIMARY KEY, " +

$"{IdCountry} TEXT, " +

$"{IdProvince} TEXT, " +

$"{IdCity} TEXT, " +

$"{IdStreet} TEXT " +

");";

command.ExecuteNonQuery();

}

private void VacuumDb()

{

Log.Instance.Info("Optimizing database");

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.CommandText = "VACUUM;";

command.ExecuteNonQuery();

}

Log.Instance.Info("Optimizing database done");

}

private SqliteTransaction WriteDbVersion()

{

SqliteTransaction transaction = null;

if (Version == null)

{

transaction = BeginTransaction();

ExecuteNonQuery($"INSERT INTO {TableKeyValues}({IdKey}, {IdValue}) VALUES('Version', '{CurrentVersion}');", transaction);

Version = CurrentVersion;

}

if (Version == Version10)

{

transaction ??= BeginTransaction();

ExecuteNonQuery($"ALTER TABLE {TableFileFaces} ADD {IdFaceMode} INTEGER DEFAULT {(int)FaceMode.Undefined};", transaction);

ExecuteNonQuery($"UPDATE {TableFiles} SET {IdProcessingInfo}={(long)ProcessingInfos.None};", transaction);

UpdateDbVersion(transaction, Version11);

}

if (Version == Version11)

{

transaction ??= BeginTransaction();

ExecuteNonQuery($"ALTER TABLE {TableFileFaces} ADD {IdVisible} INTEGER DEFAULT 1;", transaction);

UpdateDbVersion(transaction, Version12);

}

if (Version == Version12)

{

transaction ??= BeginTransaction();

ExecuteNonQuery($"ALTER TABLE {TableFileFaces} ADD {IdFaceQuality} INTEGER DEFAULT {(int)FaceQuality.Normal};", transaction);

UpdateDbVersion(transaction, Version13);

}

if (Version != CurrentVersion)

{

transaction?.Dispose();

DestroyConnection();

CreateConnection();

transaction = BeginTransaction();

foreach (string tableName in _dataTableNames)

{

ExecuteNonQuery($"DROP TABLE IF EXISTS {tableName};", transaction);

}

UpdateDbVersion(transaction, CurrentVersion);

}

return transaction ?? BeginTransaction();

}

private void UpdateDbVersion(SqliteTransaction transaction, string version)

{

Version = version;

ExecuteNonQuery($"UPDATE {TableKeyValues} SET {IdValue}='{Version}' WHERE {IdKey}='Version';", transaction);

}

private void ExecuteNonQuery(string commandText, SqliteTransaction transaction = null)

{

using (var command = new SqliteCommand())

{

command.Connection = Connection;

command.Transaction = transaction;

command.CommandText = commandText;

command.ExecuteNonQuery();

}

private readonly IReadOnlyList<string> _dataTableNames = new[]

{

TableFiles,

TablePersons,

TableTags,

TableLocations,

TableFileData,

TableFileFaces,

TableFileTags,

TableFileLocations

};

private int _numTransactions;

private readonly string _fileName;

#endregion

}

TCSystemCS/MetaDataDB/DB2Instance.cs at develop · tgoessler/TCSystemCS · GitHub

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