4.9. Sample Client using an EndpointReference
We will try out our service first with a simple client that creates a new resource and performs a couple operations on it. Starting from the client.py that was generated by wsdl2web.py all that's needed are a few rpc calls to demonstrate WSRF resource's behavior.
#!/usr/bin/env python
############################################################################
# Automatically generated by wsdl2web.py
# See LBNLCopyright for copyright notice!
###########################################################################
from twisted.python import log
from twisted.internet import reactor
import ZSI
from pyGridWare.utility.scripts.client import GetBasicOptParser, GetPortKWArgs, SetUp
from generated.MathService.stubs import MathService as CLIENT
def main(**kw):
locator = CLIENT.MathServiceLocator()
port = locator.getMathPortType(**kw) 
msg = port.createResource(CLIENT.CreateInputMessage()) 
iport = locator.getMathPortType(endPointReference=msg.EndpointReference, **kw) 
for i in range(10):
iport.add(CLIENT.AddInputMessage(i)) 
msg = iport.subtract(CLIENT.SubtractInputMessage(10))
msg = iport.getValueRP(CLIENT.GetValueRPInputMessage())
# Factory METHOD Just guessing here
#response = port.create(CLIENT.CreateRequest())
#kw['endPointReference'] = response._EndpointReference
#iport = locator.getMathPortType(**kw)
reactor.stop()
print "MSG: ", msg
print "CORRECT: ", msg == sum(range(10)) - 10
if __name__ == '__main__':
op = GetBasicOptParser()
(options, args) = op.parse_args()
SetUp(options)
kw = GetPortKWArgs(options)
reactor.callWhenRunning(main, **kw)
reactor.run()
 | Copy & Paste example.. |
- Here we obtain a reference to a MathPortType instance.
- Once we have the MathPortType, we use it to invoke the createResource operation. This operation returns an endpoint reference, inside a CreateResourceResponse object. This endpoint reference includes both the instance service's URI and the new resource's identifier. In the next client we will take a peek inside the endpoint reference.
- Using the instance EPR, we obtain a new MathPortType which will now refer to the instance service.
- We now use the MathPortType to invoke add, subtract, and getValueRP.
run the client:
./client.py -u http://127.0.0.1:9080/wsrf/services/MathService -d 0
If all goes well, you should see the following:
MSG: 35 CORRECT: True
If you run it again, you will get the exact same result. This is because we are creating a new resource every time we run the client.
MSG: 35 CORRECT: True