1

我有一个服务,如下:

"""
The most basic (working) CherryPy 3.1 Windows service possible.
Requires Mark Hammond's pywin32 package.
"""

import cherrypy
import win32serviceutil
import win32service
import sys
import __builtin__

__builtin__.theService = None

class HelloWorld:
    """ Sample request handler class. """

    def __init__(self):
        self.iVal = 0

    @cherrypy.expose
    def index(self):

        try:

            self.iVal += 1 

            if self.iVal == 5:
                sys.exit()
            return "Hello world! " + str(self.iVal) 

        except SystemExit:
            StopServiceError(__builtin__.theService)


class MyService(win32serviceutil.ServiceFramework):
    """NT Service."""

    _svc_name_ = "CherryPyService"
    _svc_display_name_ = "CherryPy Service"
    _svc_description_ = "Some description for this service"

    def SvcDoRun(self):
        __builtin__.theService = self
        StartService()


    def SvcStop(self):
        StopService(__builtin__.theService)


def StartService():

    cherrypy.tree.mount(HelloWorld(), '/')

    cherrypy.config.update({
        'global':{
            'tools.log_tracebacks.on': True,
            'log.error_file': '\\Error_File.txt',
            'log.screen': True,
            'engine.autoreload.on': False,
            'engine.SIGHUP': None,
            'engine.SIGTERM': None
            }
        })

    cherrypy.engine.start()
    cherrypy.engine.block()


def StopService(classObject):
    classObject.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
    cherrypy.engine.exit()
    classObject.ReportServiceStatus(win32service.SERVICE_STOPPED)


def StopServiceError(classObject):
    classObject.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
    cherrypy.engine.exit()
    classObject.ReportServiceStatus(serviceStatus=win32service.SERVICE_STOPPED, win32ExitCode=1, svcExitCode=1)

if __name__ == '__main__':
    win32serviceutil.HandleCommandLine(MyService)

当 sys.ext() 导致服务退出时,我希望 Windows 重新启动服务。有谁知道如何让它做到这一点?

4

2 回答 2

4

与编程无关的选项:

可以配置 Windows 服务以进行恢复。选择窗口的recovery标签。service properties您可以选择Restart the Service在第一次、第二次或后续失败之后。

一个简单的想法 - 你为什么不挂断sys.exit()电话?这样服务就可以继续运行,而您不必重新启动它。如果你真的需要知道什么时候self.iVal到达5,你可以向事件记录器报告(也许重置计数器)。

于 2009-06-23T10:35:25.783 回答
2

我遇到了完全相同的问题:尝试使用错误代码使基于 Python 的服务退出,以便服务框架可以重新启动它。我尝试了这种方法,ReportServiceStatus(win32service.SERVICE_STOP_PENDING, win32ExitCode=1, svcExitCode=1)sys.exit(1)没有一个提示 Windows 重新启动服务,尽管后者在事件日志中显示为错误。我最终不依赖服务框架而只是这样做:

def SvcDoRun(self):
    restart_required = run_service() # will return True if the service needs
                                     # to be restarted
    if restart_required:
        subprocess.Popen('sleep 5 & sc start %s' % self._svc_name_, shell=True)
于 2010-11-09T11:35:18.640 回答