public FileLogger(string categoryName, IFileLoggerProcessor processor, IFileLoggerSettings settings, IExternalScopeProvider scopeProvider = null,
Func <DateTimeOffset> timestampGetter = null)
{
if (categoryName == null)
{
throw new ArgumentNullException(nameof(categoryName));
}
if (processor == null)
{
throw new ArgumentNullException(nameof(processor));
}
if (settings == null)
{
throw new ArgumentNullException(nameof(settings));
}
CategoryName = categoryName;
_processor = processor;
UpdatableState state = CreateState(null, settings);
state.Settings = settings;
state.FileGroups = GetFileGroups(settings);
state.ScopeProvider = scopeProvider;
_state = state;
_timestampGetter = timestampGetter ?? (() => DateTimeOffset.UtcNow);
}
public void Log <TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func <TState, Exception, string> formatter)
{
if (!IsEnabled(logLevel))
{
return;
}
if (formatter == null)
{
throw new ArgumentNullException(nameof(formatter));
}
UpdatableState currentState = _state;
DateTimeOffset timestamp = _timestampGetter();
var message = FormatState(state, exception, formatter);
StringBuilder sb = s_stringBuilder;
s_stringBuilder = null;
if (sb == null)
{
sb = new StringBuilder();
}
foreach (KeyValuePair <(Type, bool), (ILogFileSettings, LogLevel, IFileLogEntryTextBuilder)[]> fileGroup in currentState.FileGroups)
public FileLogger(string categoryName, string fileName, IFileLoggerProcessor processor, Func <string, LogLevel, bool> filter = null, bool includeScopes = false,
IFileLogEntryTextBuilder textBuilder = null, Func <DateTimeOffset> timestampGetter = null)
{
if (categoryName == null)
{
throw new ArgumentNullException(nameof(categoryName));
}
if (fileName == null)
{
throw new ArgumentNullException(nameof(fileName));
}
if (processor == null)
{
throw new ArgumentNullException(nameof(processor));
}
CategoryName = categoryName;
_processor = processor;
_state = new UpdatableState
{
FileName = fileName,
Filter = filter ?? ((c, l) => true),
IncludeScopes = includeScopes,
TextBuilder = textBuilder ?? FileLogEntryTextBuilder.Instance,
};
_timestampGetter = timestampGetter ?? (() => DateTimeOffset.UtcNow);
}
public void Update(IExternalScopeProvider scopeProvider)
{
UpdatableState currentState = _state;
for (; ;)
{
UpdatableState newState = CreateState(currentState, null);
newState.Settings = currentState.Settings;
newState.FileGroups = currentState.FileGroups;
newState.ScopeProvider = scopeProvider;
UpdatableState originalState = Interlocked.CompareExchange(ref _state, newState, currentState);
if (currentState == originalState)
{
return;
}
currentState = originalState;
}
}
public void Update(IFileLoggerSettings settings)
{
FileGroupsDictionary fileGroups = GetFileGroups(settings);
UpdatableState currentState = _state;
for (; ;)
{
UpdatableState newState = CreateState(currentState, settings);
newState.Settings = settings;
newState.FileGroups = fileGroups;
newState.ScopeProvider = currentState.ScopeProvider;
UpdatableState originalState = Interlocked.CompareExchange(ref _state, newState, currentState);
if (currentState == originalState)
{
return;
}
currentState = originalState;
}
}
protected virtual UpdatableState CreateState(UpdatableState currentState, IFileLoggerSettings settings)
{
return(new UpdatableState());
}
protected virtual bool IsEnabled(UpdatableState state, LogLevel logLevel)
{
return(state.Filter(CategoryName, logLevel));
}
protected override bool IsEnabled(UpdatableState state, LogLevel logLevel)
{
return
(logLevel <= LogLevel.Information && // don't allow messages more severe than information to pass through
base.IsEnabled(state, logLevel));
}
