在NServiceBus初始化中为Log4Net设置缓冲区大小
在我的应用程序中配置NServiceBus时,我将Log4Net设置为使用在NServiceBus初始化中为Log4Net设置缓冲区大小,log4net,nservicebus,Log4net,Nservicebus,在我的应用程序中配置NServiceBus时,我将Log4Net设置为使用RollingFileAppender: .Log4Net<RollingFileAppender>(x=> { x.AppendToFile = true; x.Threshold = Level.Debug; x.MaxSizeRollBackups = 10; x.Ro
RollingFileAppender
:
.Log4Net<RollingFileAppender>(x=>
{
x.AppendToFile = true;
x.Threshold = Level.Debug;
x.MaxSizeRollBackups = 10;
x.RollingStyle = RollingFileAppender.RollingMode.Size;
x.File = "c:\\Logs\\log.txt";
})
.Log4Net(x=>
{
x、 AppendToFile=true;
x、 阈值=Level.Debug;
x、 MaxSizerollBackup=10;
x、 RollingStyle=RollingFileAppender.RollingMode.Size;
x、 File=“c:\\Logs\\log.txt”;
})
我想删除用于测试的缓冲(通过设置BufferSize=1
)
当使用
.Log4Net()
扩展时,这可能吗?Log4NetFileAppender
类不提供BufferSize
属性,因此您无法直接在配置中或使用该扩展方法设置它。(此属性仅由BufferingAppenderSkeleton
基类公开,但它不是FileAppender
类的基类)
实际上,在log4net代码库中,似乎控制FileAppender
使用的缓冲区大小的唯一方法是编写自己的LockingModelBase
实现。log4net附带的那些实现,即ExclusiveLock
或MinimalLock
,在内部使用FileStream
构造函数,该构造函数使用默认缓冲区大小0x1000,即4096
话虽如此,您或许可以这样做:
.Log4Net<RollingFileAppender>(x=>
{
x.AppendToFile = true;
x.Threshold = Level.Debug;
x.MaxSizeRollBackups = 10;
x.RollingStyle = RollingFileAppender.RollingMode.Size;
x.File = "c:\\Logs\\log.txt";
x.LockingModel = new MyUnbufferedLockingModel();
})
public class MyUnbufferedLockingModel : log4net.FileAppender.LockingModelBase
{
// This is essentially a rip-off of the default 'ExclusiveLock' class,
// but when creating the "m_stream", using an explicit buffer size of 1.
// Depending on your needs you may want to use the 'MinimalLock' class
// instead.
private Stream m_stream = null;
public override Stream AcquireLock()
{
return m_stream;
}
public override void CloseFile()
{
using (CurrentAppender.SecurityContext.Impersonate(this))
{
m_stream.Close();
}
}
public override void OpenFile(string filename, bool append, Encoding encoding)
{
try
{
using (CurrentAppender.SecurityContext.Impersonate(this))
{
string directoryName = Path.GetDirectoryName(filename);
if (!Directory.Exists(directoryName))
{
Directory.CreateDirectory(directoryName);
}
FileMode mode = append ? FileMode.Append : FileMode.Create;
m_stream = new FileStream(filename, mode, FileAccess.Write,
FileShare.Read,
1 /*BufferSize*/);
}
}
catch (Exception exception)
{
CurrentAppender.ErrorHandler.Error("Unable to acquire lock on file " + filename + ". " + exception.Message);
}
}
public override void ReleaseLock()
{
}
}
.Log4Net<RollingFileAppender>(x=>
{
x.LockingModel = new FileAppender.MinimalLock();
x.Threshold = Level.Debug;
x.MaxSizeRollBackups = 10;
x.RollingStyle = RollingFileAppender.RollingMode.Size;
x.File = "c:\\Logs\\log.txt";
})
最后,缓冲不是问题所在,解决方案非常简单。看起来RollingFileAppender在默认情况下使用独占锁,因此在应用程序运行时日志文件被锁定 此实例中的修复是设置:
LockingModel=newfileappender.MinimalLock()代码>
更新后的init如下所示:
.Log4Net<RollingFileAppender>(x=>
{
x.AppendToFile = true;
x.Threshold = Level.Debug;
x.MaxSizeRollBackups = 10;
x.RollingStyle = RollingFileAppender.RollingMode.Size;
x.File = "c:\\Logs\\log.txt";
x.LockingModel = new MyUnbufferedLockingModel();
})
public class MyUnbufferedLockingModel : log4net.FileAppender.LockingModelBase
{
// This is essentially a rip-off of the default 'ExclusiveLock' class,
// but when creating the "m_stream", using an explicit buffer size of 1.
// Depending on your needs you may want to use the 'MinimalLock' class
// instead.
private Stream m_stream = null;
public override Stream AcquireLock()
{
return m_stream;
}
public override void CloseFile()
{
using (CurrentAppender.SecurityContext.Impersonate(this))
{
m_stream.Close();
}
}
public override void OpenFile(string filename, bool append, Encoding encoding)
{
try
{
using (CurrentAppender.SecurityContext.Impersonate(this))
{
string directoryName = Path.GetDirectoryName(filename);
if (!Directory.Exists(directoryName))
{
Directory.CreateDirectory(directoryName);
}
FileMode mode = append ? FileMode.Append : FileMode.Create;
m_stream = new FileStream(filename, mode, FileAccess.Write,
FileShare.Read,
1 /*BufferSize*/);
}
}
catch (Exception exception)
{
CurrentAppender.ErrorHandler.Error("Unable to acquire lock on file " + filename + ". " + exception.Message);
}
}
public override void ReleaseLock()
{
}
}
.Log4Net<RollingFileAppender>(x=>
{
x.LockingModel = new FileAppender.MinimalLock();
x.Threshold = Level.Debug;
x.MaxSizeRollBackups = 10;
x.RollingStyle = RollingFileAppender.RollingMode.Size;
x.File = "c:\\Logs\\log.txt";
})
.Log4Net(x=>
{
x、 LockingModel=newFileAppender.MinimalLock();
x、 阈值=Level.Debug;
x、 MaxSizerollBackup=10;
x、 RollingStyle=RollingFileAppender.RollingMode.Size;
x、 File=“c:\\Logs\\log.txt”;
})
当我在Log4Net文档中搜索缓冲解决方案时,我偶然发现了。此附加器包装提供缓冲服务的非缓冲附加器
如果我想向RollingFileAppender添加缓冲,那么配置将是这样的:
.Log4Net<BufferingForwardingAppender>
(x =>
{
x.BufferSize = 50; // number of events to buffer
x.AddAppender(new RollingFileAppender()
{
LockingModel = new FileAppender.MinimalLock(),
Layout = new SimpleLayout(),
Threshold = Level.Debug,
MaxSizeRollBackups = 10,
RollingStyle = RollingFileAppender.RollingMode.Size,
File = "c:\\Logs\\log.txt",
SecurityContext = NullSecurityContext.Instance
});
})
.Log4Net
(x=>
{
x、 BufferSize=50;//要缓冲的事件数
x、 AddAppender(新的RollingFileAppender()
{
LockingModel=new FileAppender.MinimalLock(),
布局=新的SimpleLayout(),
阈值=Level.Debug,
MaxSizerollBackup=10,
RollingStyle=RollingFileAppender.RollingMode.Size,
File=“c:\\Logs\\log.txt”,
SecurityContext=NullSecurityContext.Instance
});
})
帕特里克。谢谢你创造性的回答。你最终让我找到了答案,所以我会相信你。我还将用我的工作解决方案为这个问题创建另一个答案。谢谢:-)然后你也应该接受你自己的答案作为正确答案。