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using System;
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using System.Data;
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using Dapper;
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using NLog;
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using NzbDrone.Common.Instrumentation;
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namespace NzbDrone.Core.Datastore
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{
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public interface IDatabase
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{
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IDbConnection OpenConnection();
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Version Version { get; }
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int Migration { get; }
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void Vacuum();
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}
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public class Database : IDatabase
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{
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private readonly string _databaseName;
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private readonly Func<IDbConnection> _datamapperFactory;
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private readonly Logger _logger = NzbDroneLogger.GetLogger(typeof(Database));
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public Database(string databaseName, Func<IDbConnection> datamapperFactory)
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{
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_databaseName = databaseName;
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_datamapperFactory = datamapperFactory;
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}
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public IDbConnection OpenConnection()
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{
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return _datamapperFactory();
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}
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public Version Version
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{
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get
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{
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using (var db = _datamapperFactory())
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{
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var version = db.QueryFirstOrDefault<string>("SELECT sqlite_version()");
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return new Version(version);
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}
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}
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}
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public int Migration
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{
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get
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{
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using (var db = _datamapperFactory())
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{
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return db.QueryFirstOrDefault<int>("SELECT version from VersionInfo ORDER BY version DESC LIMIT 1");
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}
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}
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}
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public void Vacuum()
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{
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try
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{
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_logger.Info("Vacuuming {0} database", _databaseName);
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using (var db = _datamapperFactory())
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{
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db.Execute("Vacuum;");
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}
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_logger.Info("{0} database compressed", _databaseName);
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}
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catch (Exception e)
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{
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_logger.Error(e, "An Error occurred while vacuuming database.");
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}
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}
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}
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}
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