public virtual void Initialize(ComponentModel.ApplicationContextBase context)
{
if (context == null)
{
return;
}
//从当前应用的主配置文件中获取日志器的主配置节
var loggerElement = context.Configuration.GetOptionObject(@"/Diagnostics/Logger") as Configuration.LoggerElement;
if (loggerElement == null)
{
return;
}
foreach (Configuration.LoggerHandlerElement handlerElement in loggerElement.Handlers)
{
var type = Type.GetType(handlerElement.TypeName, true, true);
//如果当前处理节配置的日志处理器类型不是一个记录器则抛出异常
if (!typeof(ILogger).IsAssignableFrom(type))
{
throw new Options.Configuration.OptionConfigurationException(string.Format("The '{0}' type isn't a Logger.", type.FullName));
}
//获取日志记录器实现类的带参构造函数
var constructor = type.GetConstructor(new Type[] { typeof(Configuration.LoggerHandlerElement) });
ILogger instance;
//试图创建日志记录器实例
if (constructor == null)
{
instance = (ILogger)Activator.CreateInstance(type);
}
else
{
instance = (ILogger)Activator.CreateInstance(type, handlerElement);
}
//如果日志记录器实例创建失败则抛出异常
if (instance == null)
{
throw new Options.Configuration.OptionConfigurationException(string.Format("Can not create instance of '{0}' type.", type));
}
//如果日志记录器配置节含有扩展属性，则设置日志记录器实例的扩展属性
if (handlerElement.HasExtendedProperties)
{
foreach (var property in handlerElement.ExtendedProperties)
{
Common.Converter.SetValue(instance, property.Key, property.Value);
}
}
LoggerHandlerPredication predication = null;
if (handlerElement.Predication != null)
{
predication = new LoggerHandlerPredication()
{
Source = handlerElement.Predication.Source,
ExceptionType = handlerElement.Predication.ExceptionType,
MaxLevel = handlerElement.Predication.MaxLevel,
MinLevel = handlerElement.Predication.MinLevel,
};
}
Logger.Handlers.Add(new LoggerHandler(handlerElement.Name, instance, predication));
}
}
public LoggerHandler(string name, ILogger logger = null, LoggerHandlerPredication predication = null) : base(name)
{
_logger = logger;
this.Predication = predication ?? new LoggerHandlerPredication();
}