Hi all,
I 'm trying to load my application perfmance counter into
window perfmon. I use example found in Python Programming on Win32 book. I
can install service sucessfully. I can see my service in services list. My
broblem is, I got error below
--- Command ---
C:\PyPerf>python PipeService2.py --perfmonini=perf_install.ini install
--- Error ---
The service was installed OK, but the performance monitor
data could not be loaded. (2001, 'LoadPerfCounterTextStrings', 'The
specified driver is invalid.')
--- Environtment ---
-Window server 2003
-Python 2.4.4
-pywin32-210.win32-py2.4.exe
--- Service script PipeService2.py ---
# PipeService2.py
#
# A sample demonstrating a service which uses a
# named-pipe to accept client connections,
# and writes data to the event log.
import win32serviceutil
import win32service
import win32event
import win32pipe
import win32file
import pywintypes
import winerror
import perfmon
import os
class PipeService(win32serviceutil.ServiceFramework):
_svc_name_ = "PythonPipeService"
_svc_display_name_ = "A sample Python service using named pipes"
def __init__(self, args):
win32serviceutil.ServiceFramework.__init__(self, args)
# Create an event which we will use to wait on.
# The "service stop" request will set this event.
self.hWaitStop = win32event.CreateEvent(None, 0, 0, None)
# We need to use overlapped IO for this, so we dont block when
# waiting for a client to connect. This is the only effective way
# to handle either a client connection, or a service stop request.
self.overlapped = pywintypes.OVERLAPPED()
# And create an event to be used in the OVERLAPPED object.
self.overlapped.hEvent = win32event.CreateEvent(None,0,0,None)
# Finally initialize our Performance Monitor counters
self.InitPerfMon()
def InitPerfMon(self):
# Magic numbers (2 and 4) must match header and ini file used
# at install - could lookup ini, but then Id need it a runtime
# A counter for number of connections per second.
self.counterConnections=perfmon.CounterDefinition(2)
# We arent expecting many, so we set the scale high (ie, x10)
# Note the scale is 10^DefaultScale = ie, to get 10, we use 1!
self.counterConnections.DefaultScale = 1
# Now a counter for the number of bytes received per second.
self.counterBytes=perfmon.CounterDefinition(4)
# A scale of 1 is fine for this counter.
self.counterBytes.DefaultScale = 0
# Now register our counters with the performance monitor
perfObjectType = perfmon.ObjectType( (self.counterConnections,
self.counterBytes) )
self.perfManager = perfmon.PerfMonManager(
self._svc_name_,
(perfObjectType,),
"perfmondata")
def TermPerfMon(self):
self.perfManager.Close()
self.perfManager = None
def SvcStop(self):
# Before we do anything, tell the SCM we are starting the stop
process.
self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
# And set my event.
win32event.SetEvent(self.hWaitStop)
def SvcDoRun(self):
# Log a "started" message to the event log.
import servicemanager
servicemanager.LogMsg(
servicemanager.EVENTLOG_INFORMATION_TYPE,
servicemanager.PYS_SERVICE_STARTED,
(self._svc_name_, ''))
# We create our named pipe.
pipeName = "\\\\.\\pipe\\PyPipeService"
openMode = win32pipe.PIPE_ACCESS_DUPLEX |
win32file.FILE_FLAG_OVERLAPPED
pipeMode = win32pipe.PIPE_TYPE_MESSAGE
# When running as a service, we must use special security for the
pipe
sa = pywintypes.SECURITY_ATTRIBUTES()
# Say we do have a DACL, and it is empty
# (ie, allow full access!)
sa.SetSecurityDescriptorDacl ( 1, None, 0 )
pipeHandle = win32pipe.CreateNamedPipe(pipeName,
openMode,
pipeMode,
win32pipe.PIPE_UNLIMITED_INSTANCES,
0, 0, 6000, # default buffers, and 6 second timeout.
sa)
# Loop accepting and processing connections
while 1:
try:
hr = win32pipe.ConnectNamedPipe(pipeHandle, self.overlapped)
except error, details:
print "Error connecting pipe!", details
pipeHandle.Close()
break
if hr==winerror.ERROR_PIPE_CONNECTED:
# Client is fast, and already connected - signal event
win32event.SetEvent(self.overlapped.hEvent)
# Wait for either a connection, or a service stop request.
timeout = win32event.INFINITE
waitHandles = self.hWaitStop, self.overlapped.hEvent
rc = win32event.WaitForMultipleObjects(waitHandles, 0, timeout)
if rc==win32event.WAIT_OBJECT_0:
# Stop event
break
else:
# Pipe event - read the data, and write it back.
# But first, increment our Performance Monitor data
self.counterConnections.Increment()
# (We only handle a max of 255 characters for this sample)
try:
hr, data = win32file.ReadFile(pipeHandle, 256)
win32file.WriteFile(pipeHandle, "You sent me:" + data)
# And disconnect from the client.
win32pipe.DisconnectNamedPipe(pipeHandle)
# Update our performance monitor "bytes read" counter
self.counterBytes.Increment(len(data))
# Log a message to the event log indicating what we did.
message = "Processed %d bytes for client connection" % \
len(data)
servicemanager.LogInfoMsg(message)
except win32file.error:
# Client disconnected without sending data
# or before reading the response.
# Thats OK - just get the next connection
continue
# cleanup our PerfMon counters.
self.TermPerfMon()
# Now log a "service stopped" message
servicemanager.LogMsg(
servicemanager.EVENTLOG_INFORMATION_TYPE,
servicemanager.PYS_SERVICE_STOPPED,
(self._svc_name_, ''))
if __name__=='__main__':
win32serviceutil.HandleCommandLine(PipeService)
--- ini file ---
; PipeService2_install.ini
; File used at installation time to install
; Performance Monitor Counters for our sample service.
;
[info]
; drivername MUST be the same as the service name
drivername=PythonPipeService
symbolfile=PipeService2_install.h
[languages]
009=English
[text]
SERVICE_009_NAME=Python Demo Service
SERVICE_009_HELP=Shows performance statistics for the sample Python service
CONNECTIONS_009_NAME=Number of connections per second.
CONNECTIONS_009_HELP=Indicates the load on the service.
BYTES_009_NAME=Bytes read/sec
BYTES_009_HELP=Number of bytes read per second by the service.
--- header file ---
// PipeService2_install.h
// File used at installation time to install
// Performance Monitor Counters for our sample service.
//
// All these list the counters in order.
// Important that you add these in this order in
// the Python code.
#define SERVICE 0
#define CONNECTIONS 2 // Number of connections
#define BYTES 4 // Number of bytes received.
Regards
Chatchai
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