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Config.cs
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Config.cs
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using System;
using System.IO;
using System.Reflection;
using Config4Net.Core.Adapter;
using Config4Net.Core.Manager;
using Config4Net.Core.StoreService;
using Config4Net.Utils;
using Newtonsoft.Json;
namespace Config4Net.Core
{
/// <summary>
/// Manages configurations.
/// </summary>
public sealed partial class Config
{
private readonly IConfigDataFactoryManager _configDataFactoryManager;
private readonly IConfigDataManager _configDataManager;
private volatile bool _loaded;
private Settings _settings;
private Config()
{
_configDataManager = new ConfigDataManagerImpl();
_configDataFactoryManager = new ConfigDataFactoryManagerImpl();
InitializeSettings();
}
/// <summary>
/// Default instance of <see cref="Config" />.
/// </summary>
public static Config Default { get; } = Create();
/// <summary>
/// Settings for <see cref="Config" />. Can not be null.
/// </summary>
public Settings Settings
{
get => _settings;
set
{
Precondition.ArgumentNotNull(value, nameof(Settings));
_settings?.Release();
_settings = value;
_settings.SetOnApplicationClosing(OnApplicationClosing);
_configDataManager.Settings = value;
}
}
/// <summary>
/// Gets a confiuration by a specific config key.
/// </summary>
/// <exception cref="ConfigException">
/// Occurs when the config key does not exist.
/// </exception>
/// <remarks>
/// If the specific configuration does not exist, an exception will be thrown.
/// </remarks>
public dynamic this[string key]
{
get
{
EnsureLoaded();
lock (this)
{
if (_configDataManager.Has(key))
return _configDataManager.Get(key);
throw new ConfigException($"Config key {key} does not exist");
}
}
}
/// <summary>
/// Creates new <see cref="Config" /> instance.
/// </summary>
/// <returns></returns>
public static Config Create()
{
return new Config();
}
private void Load()
{
lock (this)
{
_configDataManager.Load();
_loaded = true;
}
}
private void Save()
{
_configDataManager.Save();
}
private void EnsureLoaded()
{
if (!_loaded)
Load();
}
private string GetConfigKeyByType(Type type)
{
var configAttribute = type.GetCustomAttribute<ConfigAttribute>();
if (!string.IsNullOrEmpty(configAttribute?.Key))
return configAttribute.Key;
if (Settings.PreferAppNameAsKey)
{
if (string.IsNullOrEmpty(Settings.AppName))
{
var assembly = Assembly.GetEntryAssembly() ?? type.Assembly;
return Path.GetFileNameWithoutExtension(assembly.Location);
}
return Settings.AppName;
}
return type.Name;
}
private object GetConfigDataByType(Type type)
{
var configDataFactory = _configDataFactoryManager.Get(type, Settings.PreventNullReference);
return configDataFactory.Create();
}
private T RegisterWithResult<T>(string configKey)
{
var configData = GetConfigDataByType(typeof(T));
_configDataManager.Add(configKey, configData);
return (T) configData;
}
private void InitializeSettings()
{
Settings = new Settings
{
StoreService = new PlainTextStoreService(),
ApplicationClosingEvent = new DefaultApplicationClosingEvent(),
ConfigFileAdapter = new JsonConfigFileAdapter(JsonSerializer.CreateDefault()),
ConfigFileFactory = new DefaultConfigFileFactory(),
ConfigFileNameFactory = new DefaultConfigFileNameFactory(),
ConfigFileExtension = "json",
ConfigDir = Environment.CurrentDirectory,
PreventNullReference = false,
WriteFileTimeout = 5000,
AutoRegisterConfigType = true,
SaveWhenApplicationClosing = true,
IgnoreLoadingFailure = true,
PreferAppNameAsKey = false
};
}
private void OnApplicationClosing()
{
if (!Settings.SaveWhenApplicationClosing) return;
SaveAsync().Wait(Settings.WriteFileTimeout);
}
}
}