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309 lines
11 KiB
C#
309 lines
11 KiB
C#
using MediaBrowser.Controller;
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using MediaBrowser.Controller.Activity;
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using MediaBrowser.Model.Activity;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.Querying;
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using MediaBrowser.Server.Implementations.Persistence;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Globalization;
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.Activity
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{
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public class ActivityRepository : IActivityRepository, IDisposable
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{
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private IDbConnection _connection;
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private readonly ILogger _logger;
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private readonly SemaphoreSlim _writeLock = new SemaphoreSlim(1, 1);
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private readonly IServerApplicationPaths _appPaths;
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private readonly CultureInfo _usCulture = new CultureInfo("en-US");
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private IDbCommand _saveActivityCommand;
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public ActivityRepository(ILogger logger, IServerApplicationPaths appPaths)
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{
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_logger = logger;
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_appPaths = appPaths;
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}
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public async Task Initialize()
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{
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var dbFile = Path.Combine(_appPaths.DataPath, "activitylog.db");
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_connection = await SqliteExtensions.ConnectToDb(dbFile, _logger).ConfigureAwait(false);
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string[] queries = {
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"create table if not exists ActivityLogEntries (Id GUID PRIMARY KEY, Name TEXT, Overview TEXT, ShortOverview TEXT, Type TEXT, ItemId TEXT, UserId TEXT, DateCreated DATETIME, LogSeverity TEXT)",
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"create index if not exists idx_ActivityLogEntries on ActivityLogEntries(Id)",
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//pragmas
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"pragma temp_store = memory",
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"pragma shrink_memory"
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};
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_connection.RunQueries(queries, _logger);
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PrepareStatements();
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}
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private void PrepareStatements()
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{
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_saveActivityCommand = _connection.CreateCommand();
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_saveActivityCommand.CommandText = "replace into ActivityLogEntries (Id, Name, Overview, ShortOverview, Type, ItemId, UserId, DateCreated, LogSeverity) values (@Id, @Name, @Overview, @ShortOverview, @Type, @ItemId, @UserId, @DateCreated, @LogSeverity)";
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_saveActivityCommand.Parameters.Add(_saveActivityCommand, "@Id");
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_saveActivityCommand.Parameters.Add(_saveActivityCommand, "@Name");
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_saveActivityCommand.Parameters.Add(_saveActivityCommand, "@Overview");
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_saveActivityCommand.Parameters.Add(_saveActivityCommand, "@ShortOverview");
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_saveActivityCommand.Parameters.Add(_saveActivityCommand, "@Type");
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_saveActivityCommand.Parameters.Add(_saveActivityCommand, "@ItemId");
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_saveActivityCommand.Parameters.Add(_saveActivityCommand, "@UserId");
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_saveActivityCommand.Parameters.Add(_saveActivityCommand, "@DateCreated");
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_saveActivityCommand.Parameters.Add(_saveActivityCommand, "@LogSeverity");
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}
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private const string BaseActivitySelectText = "select Id, Name, Overview, ShortOverview, Type, ItemId, UserId, DateCreated, LogSeverity from ActivityLogEntries";
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public Task Create(ActivityLogEntry entry)
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{
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return Update(entry);
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}
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public async Task Update(ActivityLogEntry entry)
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{
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if (entry == null)
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{
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throw new ArgumentNullException("entry");
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}
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await _writeLock.WaitAsync().ConfigureAwait(false);
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IDbTransaction transaction = null;
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try
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{
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transaction = _connection.BeginTransaction();
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var index = 0;
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_saveActivityCommand.GetParameter(index++).Value = new Guid(entry.Id);
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_saveActivityCommand.GetParameter(index++).Value = entry.Name;
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_saveActivityCommand.GetParameter(index++).Value = entry.Overview;
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_saveActivityCommand.GetParameter(index++).Value = entry.ShortOverview;
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_saveActivityCommand.GetParameter(index++).Value = entry.Type;
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_saveActivityCommand.GetParameter(index++).Value = entry.ItemId;
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_saveActivityCommand.GetParameter(index++).Value = entry.UserId;
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_saveActivityCommand.GetParameter(index++).Value = entry.Date;
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_saveActivityCommand.GetParameter(index++).Value = entry.Severity.ToString();
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_saveActivityCommand.Transaction = transaction;
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_saveActivityCommand.ExecuteNonQuery();
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transaction.Commit();
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}
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catch (OperationCanceledException)
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{
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if (transaction != null)
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{
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transaction.Rollback();
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}
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throw;
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}
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catch (Exception e)
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{
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_logger.ErrorException("Failed to save record:", e);
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if (transaction != null)
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{
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transaction.Rollback();
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}
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throw;
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}
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finally
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{
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if (transaction != null)
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{
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transaction.Dispose();
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}
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_writeLock.Release();
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}
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}
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public QueryResult<ActivityLogEntry> GetActivityLogEntries(DateTime? minDate, int? startIndex, int? limit)
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{
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using (var cmd = _connection.CreateCommand())
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{
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cmd.CommandText = BaseActivitySelectText;
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var whereClauses = new List<string>();
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if (minDate.HasValue)
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{
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whereClauses.Add("DateCreated>=@DateCreated");
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cmd.Parameters.Add(cmd, "@DateCreated", DbType.Date).Value = minDate.Value;
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}
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var whereTextWithoutPaging = whereClauses.Count == 0 ?
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string.Empty :
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" where " + string.Join(" AND ", whereClauses.ToArray());
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if (startIndex.HasValue && startIndex.Value > 0)
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{
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var pagingWhereText = whereClauses.Count == 0 ?
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string.Empty :
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" where " + string.Join(" AND ", whereClauses.ToArray());
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whereClauses.Add(string.Format("Id NOT IN (SELECT Id FROM ActivityLogEntries {0} ORDER BY DateCreated DESC LIMIT {1})",
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pagingWhereText,
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startIndex.Value.ToString(_usCulture)));
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}
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var whereText = whereClauses.Count == 0 ?
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string.Empty :
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" where " + string.Join(" AND ", whereClauses.ToArray());
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cmd.CommandText += whereText;
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cmd.CommandText += " ORDER BY DateCreated DESC";
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if (limit.HasValue)
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{
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cmd.CommandText += " LIMIT " + limit.Value.ToString(_usCulture);
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}
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cmd.CommandText += "; select count (Id) from ActivityLogEntries" + whereTextWithoutPaging;
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var list = new List<ActivityLogEntry>();
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var count = 0;
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using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess))
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{
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while (reader.Read())
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{
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list.Add(GetEntry(reader));
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}
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if (reader.NextResult() && reader.Read())
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{
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count = reader.GetInt32(0);
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}
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}
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return new QueryResult<ActivityLogEntry>()
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{
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Items = list.ToArray(),
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TotalRecordCount = count
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};
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}
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}
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private ActivityLogEntry GetEntry(IDataReader reader)
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{
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var index = 0;
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var info = new ActivityLogEntry
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{
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Id = reader.GetGuid(index).ToString("N")
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};
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index++;
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if (!reader.IsDBNull(index))
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{
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info.Name = reader.GetString(index);
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}
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index++;
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if (!reader.IsDBNull(index))
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{
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info.Overview = reader.GetString(index);
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}
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index++;
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if (!reader.IsDBNull(index))
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{
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info.ShortOverview = reader.GetString(index);
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}
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index++;
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if (!reader.IsDBNull(index))
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{
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info.Type = reader.GetString(index);
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}
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index++;
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if (!reader.IsDBNull(index))
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{
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info.ItemId = reader.GetString(index);
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}
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index++;
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if (!reader.IsDBNull(index))
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{
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info.UserId = reader.GetString(index);
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}
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index++;
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info.Date = reader.GetDateTime(index).ToUniversalTime();
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index++;
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if (!reader.IsDBNull(index))
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{
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info.Severity = (LogSeverity)Enum.Parse(typeof(LogSeverity), reader.GetString(index), true);
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}
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return info;
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}
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/// <summary>
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/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
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/// </summary>
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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private readonly object _disposeLock = new object();
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/// <summary>
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/// Releases unmanaged and - optionally - managed resources.
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/// </summary>
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/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
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protected virtual void Dispose(bool dispose)
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{
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if (dispose)
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{
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try
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{
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lock (_disposeLock)
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{
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if (_connection != null)
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{
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if (_connection.IsOpen())
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{
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_connection.Close();
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}
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_connection.Dispose();
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_connection = null;
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}
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}
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error disposing database", ex);
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}
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}
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}
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}
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}
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