public TraceEventArgs(TraceEntry entry)
{
if(entry == null)
throw new ArgumentNullException("entry");
_entry = entry;
}
public override void OnTrace(TraceEntry entry)
{
if(entry == null)
return;
System.Diagnostics.EventLog.WriteEntry(entry.Source, entry.ToString(), GetEventLogEntryType(entry.EntryType));
}
public override void OnTrace(TraceEntry entry)
{
if(entry == null)
return;
ConsoleColor foregroundColor = Console.ForegroundColor;
switch(entry.EntryType)
{
case TraceEntryType.Warning:
Console.ForegroundColor = ConsoleColor.Yellow;
break;
case TraceEntryType.Failure:
Console.ForegroundColor = ConsoleColor.Magenta;
break;
case TraceEntryType.Error:
Console.ForegroundColor = ConsoleColor.Red;
break;
}
try
{
Console.WriteLine(entry.ToString(false));
}
finally
{
Console.ForegroundColor = foregroundColor;
}
}
/// <summary>
/// 将日志记录项追加到指定的日志文件中。
/// </summary>
/// <param name="filePath">要写入的日志文件，如果文件不存在则新建它。</param>
/// <param name="entry">要写入的日志记录项。</param>
/// <exception cref="System.ArgumentNullException">filePath 是空(null)或空字符串("")，entry 是空(null)。</exception>
public void WriteEntry(string filePath, TraceEntry entry)
{
if(string.IsNullOrEmpty(filePath))
throw new ArgumentNullException("filePath");
if(entry == null)
throw new ArgumentNullException("entry");
filePath = this.GetFilePath(filePath);
using(FileStream stream = new FileStream(filePath, FileMode.Append, FileAccess.Write, FileShare.Read, DefaultBufferSize, false))
{
using(var writer = new StreamWriter(stream, Encoding.UTF8, DefaultBufferSize))
{
writer.WriteLine("[{0}] {1}, {2}@{3}", entry.EntryType.ToString(), entry.Timestamp.ToString(), Environment.UserName, Environment.MachineName);
writer.WriteLine("Message: {0}", entry.Message);
if(!string.IsNullOrEmpty(entry.StackTrace))
{
writer.WriteLine("StackTrace:");
writer.WriteLine(entry.StackTrace);
}
if(entry.Data != null)
{
writer.WriteLine(this.GetTypeName(entry.Data.GetType()));
writer.WriteLine("{");
writer.Flush();
//创建文本序列化器
var serializer = this.Serializer;
//将实体的数据对象序列化到日志文件中
if(serializer != null)
serializer.Serialize(stream, entry.Data);
writer.WriteLine("}");
}
}
}
}
public override void OnTrace(TraceEntry entry)
{
if(entry == null)
return;
if(!Directory.Exists(_logsDirectory))
Directory.CreateDirectory(_logsDirectory);
string fileName = (string.IsNullOrWhiteSpace(entry.Source) ? "nosource" : entry.Source) + ".log";
char[] invalidChars = System.IO.Path.GetInvalidFileNameChars();
foreach(char invalidChar in invalidChars)
fileName.Replace(invalidChar.ToString(), string.Empty);
this.WriteEntry(Path.Combine(_logsDirectory, fileName), entry);
}
public abstract void OnTrace(TraceEntry entry);
protected void OnTraced(TraceEntry entry)
{
try
{
TraceEventArgs args = new TraceEventArgs(entry);
this.OnTraced(args);
}
catch(Exception ex)
{
this.OnFailed(new FailureEventArgs(ex, entry));
}
}
protected bool OnTracing(TraceEntry entry)
{
try
{
TracingEventArgs args = new TracingEventArgs(entry);
this.OnTracing(args);
return args.Cancel;
}
catch(Exception ex)
{
this.OnFailed(new FailureEventArgs(ex, entry));
return false;
}
}
public void Trace(TraceEntry entry)
{
if(entry == null)
throw new ArgumentNullException("entry");
//设置跟踪实体对象的StackTrace属性
if(string.IsNullOrEmpty(entry.StackTrace))
entry.StackTrace = this.GetStackTrace();
//激发“Tracing”事件
if(this.OnTracing(entry))
return;
foreach(var listener in _listeners)
{
if(listener != null)
this.DoListen(listener, entry);
}
//激发“Traced”事件
this.OnTraced(entry);
}
public bool Assert(bool condition, TraceEntry entry)
{
if(entry == null)
throw new ArgumentNullException("entry");
if(!condition)
this.Trace(entry);
return !condition;
}
public TracingEventArgs(TraceEntry entry, bool cancel) : base(entry)
{
}
public TracingEventArgs(TraceEntry entry) : this(entry, false)
{
}
private void DoListen(ITraceListener listener, TraceEntry entry)
{
if(listener == null)
return;
bool shouldTrace = true;
try
{
if(listener.Filter != null)
shouldTrace = listener.Filter.ShouldTrace(entry);
}
catch(Exception ex)
{
this.OnFailed(new FailureEventArgs(ex, listener.Filter));
}
try
{
if(shouldTrace)
listener.OnTrace(entry);
}
catch(Exception ex)
{
this.OnFailed(new FailureEventArgs(ex, listener));
}
}
