我有一个
EventWaitHandle
我创建的,然后关闭的。当我尝试用
this ctor
EventWaitHandle
很好。有了下面(由我)发布的答案,我能够成功地打电话给你
EventWaitHandle.OpenExisting
EventWaitHandle
out parameter
,
createdNew
是为了什么?
我在同一台服务器上有以下体系结构,一个windows服务和一个web服务。web服务通过打开并设置windows服务正在等待的等待句柄来告诉windows服务它必须执行工作。
更新:引发异常&发行日志
我在web服务工作时重新启动了windows服务,希望引起这个问题,它确实做到了!一些类名因公司匿名而被审查
12:00:41,250 [7] - Stopping execution due to a ThreadAbortException
System.Threading.ThreadAbortException: Thread was being aborted.
at System.Threading.Thread.SleepInternal(Int32 millisecondsTimeout)
at OurCompany.OurProduct.MyClass.MyClassCore.MonitorRequests()
12:00:41,328 [7] - Closing Event Wait Handle
12:00:41,328 [7] - Finally block reached
12:00:42,781 [6] - Application Start
12:00:43,031 [6] - Creating EventWaitHandle: Global\OurCompany.OurProduct.MyClass.EventWaitHandle
12:00:43,031 [6] - Creating EventWaitHandle with the security entity name of : Everyone
12:00:43,078 [6] - Unhandled Exception
System.UnauthorizedAccessException: Access to the path 'Global\OurCompany.OurProduct.MyClass.EventWaitHandle' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.Threading.EventWaitHandle..ctor(Boolean initialState, EventResetMode mode, String name, Boolean& createdNew, EventWaitHandleSecurity eventSecurity)
at OurCompany.OurProduct.MyClassLibrary.EventWaitHandleFactory.GetNewWaitHandle(String handleName, String securityEntityName, Boolean& created)
at OurCompany.OurProduct.MyClassLibrary.EventWaitHandleFactory.GetNewEventWaitHandle()
at OurCompany.OurProduct.MyClass.MyClassCore..ctor()
-
11:53:09937:web服务上打开现有等待句柄的最后一个线程已完成其工作(与客户端的终止连接相同)
-
-
12:00:41250:windows服务停止
-
12:00:42781:windows服务启动
-
-
-
12:02:00000:我尝试重新启动windows服务,相同的异常
-
12:36:57328:在任意等待36分钟后,我能够在不完全重新启动系统的情况下启动windows服务。
初始化:
// I ran into security issues so I open the global EWH
// and grant access to Everyone
var ewhSecurity = new EventWaitHandleSecurity();
ewhSecurity.AddAccessRule(
new EventWaitHandleAccessRule(
"Everyone",
EventWaitHandleRights.Synchronize | EventWaitHandleRights.Modify,
AccessControlType.Allow));
this.ewh = new EventWaitHandle(
false,
EventResetMode.AutoReset,
@"Global\OurCompany.OurProduct.MyClass.EventWaitHandle",
out created,
ewhSecurity);
// the variable "created" is logged
// wait until the web service tells us to loop again
this.ewh.WaitOne();
处置/关闭:
try
{
while (true)
{
// entire service logic here
}
}
catch (Exception e)
{
// should this be in a finally, instead?
if (this.ewh != null)
{
this.ewh.Close();
}
}
Web服务代码
初始化:
// NOTE: the wait handle is a member variable on the web service
this.existing_ewh = EventWaitHandle.OpenExisting(
@"Global\OurCompany.OurProduct.MyClass.EventWaitHandle");
利用:
// wake up the windows service
this.existing_ewh.Set();
EventWaitHandle
EventWaitHandle
回想起来,我应该把
Close()
那是在
catch
一块,一块
finally
不管怎么说,有人能看出我到底做错了什么吗?将结束语句放在finally块中是否至关重要?我是否需要手动控制系统
关闭()
的
existing_ewh
在web服务上?
标准物质
