psphere: how to make thread safe

[Ramchandra Apte]

On Wednesday, 22 August 2012 17:33:48 UTC+5:30, sajuptpm  wrote:
> Hi,
> 
> 
> 
> psphere: Python interface for the VMware vSphere Web Services SDK
> 
> 
> 
> I already developed an app using https://bitbucket.org/jkinred/psphere. But getting lot of errors since psphere is not thread safe (I think). So i wrote couple of scripts to test it (See attached files) and found that caching mechanism used by psphere is not thread safe. Could someone please give me some suggestion to make it thread safe.
> 
> 
> 
> 
> 
> =======Test Code ========
> 
> 
> 
> import psphere
> 
> from psphere.client import Client
> 
> from psphere.managedobjects import HostSystem, VirtualMachine, ComputeResource
> 
> client = Client("192.168.0.114", "root", "vmware1") ##vCenter
> 
> print "\nSucessfully connected to vCenter.\n"
> 
> 
> 
> from threading import Thread
> 
> 
> 
> def myfunc(i):
> 
> 	host1 = HostSystem.get(client, name="192.168.0.134")
> 
> 	host2 = HostSystem.get(client, name="192.168.0.113")
> 
> 	print "----i------",i
> 
> 	while True:
> 
> 		#host1.update(properties=["config", "vm"])
> 
> 		#host2.update(properties=["config", "vm"])
> 
> 		c = type(host1.config.network)
> 
> 		v = type(host2.config.network)
> 
> 		for vm in host1.vm:
> 
> 			k = vm.config.template
> 
> 		for vm in host2.vm:
> 
> 			p = vm.config.template
> 
> 
> 
> 
> 
> for i in range(10):	
> 
>     t = Thread(target=myfunc, args=(i,))
> 
>     t.start()
> 
> 
> 
> 
> 
> """
> 
> OUTPUT 
> 
> =======
> 
> Sucessfully connected to vCenter.
> 
> 
> 
> ----i------ 1
> 
> ----i------ 3
> 
> ----i------ 5
> 
> ----i------ 0
> 
>  ----i------ 4
> 
> ----i------ 2----i------ 7
> 
> ----i------ 
> 
> 9
> 
> ----i------ 6
> 
> ----i------ 8
> 
> Exception in thread Thread-4:
> 
> Traceback (most recent call last):
> 
>   File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
> 
>     self.run()
> 
>   File "/usr/lib/python2.7/threading.py", line 504, in run
> 
>     self.__target(*self.__args, **self.__kwargs)
> 
>   File "vcenter_test1.py", line 19, in myfunc
> 
>     k = vm.config.template
> 
>   File "/home/saju/cvt/trunk/src/cvt/web/cvt/psphere/__init__.py", line 79, in __get__
> 
>     value = self.fget(inst)
> 
>   File "/home/saju/cvt/trunk/src/cvt/web/cvt/psphere/managedobjects.py", line 1236, in config
> 
>     return self._get_dataobject("config", False)
> 
>   File "/home/saju/cvt/trunk/src/cvt/web/cvt/psphere/__init__.py", line 116, in _get_dataobject
> 
>     return self._cache[name][0]
> 
> KeyError: 'config'
> 
> 
> 
> Exception in thread Thread-6:
> 
> Traceback (most recent call last):
> 
>   File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
> 
>     self.run()
> 
>   File "/usr/lib/python2.7/threading.py", line 504, in run
> 
>     self.__target(*self.__args, **self.__kwargs)
> 
>   File "vcenter_test1.py", line 17, in myfunc
> 
>     v = type(host2.config.network)
> 
> AttributeError: VirtualMachineConfigInfo instance has no attribute 'network'
> 
> 
> 
> 
> 
> 
> 
> """

use locks please on the cache