private static bool Initialize()
{
try
{
var logEventLevelType = FindType("NLog.LogLevel", "NLog");
if (logEventLevelType == null)
{
throw new LibLogException("Type NLog.LogLevel was not found.");
}
var levelFields = logEventLevelType.GetFields().ToList();
s_levelTrace = levelFields.First(x => x.Name == "Trace").GetValue(null);
s_levelDebug = levelFields.First(x => x.Name == "Debug").GetValue(null);
s_levelInfo = levelFields.First(x => x.Name == "Info").GetValue(null);
s_levelWarn = levelFields.First(x => x.Name == "Warn").GetValue(null);
s_levelError = levelFields.First(x => x.Name == "Error").GetValue(null);
s_levelFatal = levelFields.First(x => x.Name == "Fatal").GetValue(null);
var logEventInfoType = FindType("NLog.LogEventInfo", "NLog");
if (logEventInfoType == null)
{
throw new LibLogException("Type NLog.LogEventInfo was not found.");
}
var loggingEventConstructor =
logEventInfoType.GetConstructorPortable(logEventLevelType, typeof(string),
typeof(IFormatProvider), typeof(string), typeof(object[]), typeof(Exception));
var loggerNameParam = Expression.Parameter(typeof(string));
var levelParam = Expression.Parameter(typeof(object));
var messageParam = Expression.Parameter(typeof(string));
var messageArgsParam = Expression.Parameter(typeof(object[]));
var exceptionParam = Expression.Parameter(typeof(Exception));
var levelCast = Expression.Convert(levelParam, logEventLevelType);
var newLoggingEventExpression =
Expression.New(loggingEventConstructor,
levelCast,
loggerNameParam,
Expression.Constant(null, typeof(IFormatProvider)),
messageParam,
messageArgsParam,
exceptionParam
);
s_logEventInfoFact = Expression.Lambda <Func <string, object, string, object[], Exception, object> >(
newLoggingEventExpression,
loggerNameParam, levelParam, messageParam, messageArgsParam, exceptionParam).Compile();
var loggerType = FindType("NLog.Logger", "NLog");
s_loggerNameDelegate = GetLoggerNameDelegate(loggerType);
s_logEventDelegate = GetLogEventDelegate(loggerType, logEventInfoType);
s_isTraceEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsTraceEnabled");
s_isDebugEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsDebugEnabled");
s_isInfoEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsInfoEnabled");
s_isWarnEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsWarnEnabled");
s_isErrorEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsErrorEnabled");
s_isFatalEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsFatalEnabled");
s_traceDelegate = GetLogDelegate(loggerType, "Trace");
s_debugDelegate = GetLogDelegate(loggerType, "Debug");
s_infoDelegate = GetLogDelegate(loggerType, "Info");
s_warnDelegate = GetLogDelegate(loggerType, "Warn");
s_errorDelegate = GetLogDelegate(loggerType, "Error");
s_fatalDelegate = GetLogDelegate(loggerType, "Fatal");
s_traceExceptionDelegate = GetLogExceptionDelegate(loggerType, "TraceException");
s_debugExceptionDelegate = GetLogExceptionDelegate(loggerType, "DebugException");
s_infoExceptionDelegate = GetLogExceptionDelegate(loggerType, "InfoException");
s_warnExceptionDelegate = GetLogExceptionDelegate(loggerType, "WarnException");
s_errorExceptionDelegate = GetLogExceptionDelegate(loggerType, "ErrorException");
s_fatalExceptionDelegate = GetLogExceptionDelegate(loggerType, "FatalException");
s_structuredLoggingEnabled = IsStructuredLoggingEnabled();
}
catch (Exception ex)
{
s_initializeException = ex;
return(false);
}
return(true);
}
static NLogLogger()
{
try
{
var logEventLevelType = Type.GetType("NLog.LogLevel, NLog");
if (logEventLevelType == null)
{
throw new InvalidOperationException("Type NLog.LogLevel was not found.");
}
var levelFields = logEventLevelType.GetFields().ToList();
_levelTrace = levelFields.First(x => x.Name == "Trace").GetValue(null);
_levelDebug = levelFields.First(x => x.Name == "Debug").GetValue(null);
_levelInfo = levelFields.First(x => x.Name == "Info").GetValue(null);
_levelWarn = levelFields.First(x => x.Name == "Warn").GetValue(null);
_levelError = levelFields.First(x => x.Name == "Error").GetValue(null);
_levelFatal = levelFields.First(x => x.Name == "Fatal").GetValue(null);
var logEventInfoType = Type.GetType("NLog.LogEventInfo, NLog");
if (logEventInfoType == null)
{
throw new InvalidOperationException("Type NLog.LogEventInfo was not found.");
}
var loggingEventConstructor = logEventInfoType.GetConstructor(new []
{
logEventLevelType,
typeof(string),
typeof(IFormatProvider),
typeof(string),
typeof(object[]),
typeof(Exception),
});
ParameterExpression loggerNameParam = Expression.Parameter(typeof(string));
ParameterExpression levelParam = Expression.Parameter(typeof(object));
ParameterExpression messageParam = Expression.Parameter(typeof(string));
ParameterExpression messageArgsParam = Expression.Parameter(typeof(object[]));
ParameterExpression exceptionParam = Expression.Parameter(typeof(Exception));
UnaryExpression levelCast = Expression.Convert(levelParam, logEventLevelType);
NewExpression newLoggingEventExpression =
Expression.New(loggingEventConstructor,
levelCast,
loggerNameParam,
Expression.Constant(null, typeof(IFormatProvider)),
messageParam,
messageArgsParam,
exceptionParam
);
_logEventInfoFact = Expression.Lambda <Func <string, object, string, object[], Exception, object> >(
newLoggingEventExpression,
loggerNameParam, levelParam, messageParam, messageArgsParam, exceptionParam).Compile();
Type loggerType = Type.GetType("NLog.Logger, NLog");
_loggerNameDelegate = GetLoggerNameDelegate(loggerType);
_logEventDelegate = GetLogEventDelegate(loggerType, logEventInfoType);
_isTraceEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsTraceEnabled");
_isDebugEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsDebugEnabled");
_isInfoEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsInfoEnabled");
_isWarnEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsWarnEnabled");
_isErrorEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsErrorEnabled");
_isFatalEnabledDelegate = GetIsEnabledDelegate(loggerType, "IsFatalEnabled");
_traceDelegate = GetLogDelegate(loggerType, "Trace");
_debugDelegate = GetLogDelegate(loggerType, "Debug");
_infoDelegate = GetLogDelegate(loggerType, "Info");
_warnDelegate = GetLogDelegate(loggerType, "Warn");
_errorDelegate = GetLogDelegate(loggerType, "Error");
_fatalDelegate = GetLogDelegate(loggerType, "Fatal");
_traceExceptionDelegate = GetLogExceptionDelegate(loggerType, "TraceException");
_debugExceptionDelegate = GetLogExceptionDelegate(loggerType, "DebugException");
_infoExceptionDelegate = GetLogExceptionDelegate(loggerType, "InfoException");
_warnExceptionDelegate = GetLogExceptionDelegate(loggerType, "WarnException");
_errorExceptionDelegate = GetLogExceptionDelegate(loggerType, "ErrorException");
_fatalExceptionDelegate = GetLogExceptionDelegate(loggerType, "FatalException");
_structuredLoggingEnabled = IsStructuredLoggingEnabled();
}
catch { }
}
