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#!/usr/bin/env python
# **********************************************************************
#
# Copyright (c) 2003-2011 ZeroC, Inc. All rights reserved.
#
# This copy of Ice is licensed to you under the terms described in the
# ICE_LICENSE file included in this distribution.
#
# **********************************************************************
import sys, traceback, Ice
Ice.loadSlice('Value.ice')
import Demo, Printer
class ObjectFactory(Ice.ObjectFactory):
def create(self, type):
if type == Demo.Printer.ice_staticId():
return Printer.PrinterI()
if type == Demo.DerivedPrinter.ice_staticId():
return Printer.DerivedPrinterI()
assert(False)
def destroy(self):
# Nothing to do
pass
class Client(Ice.Application):
def run(self, args):
if len(args) > 1:
print(self.appName() + ": too many arguments")
return 1
initial = Demo.InitialPrx.checkedCast(self.communicator().propertyToProxy('Initial.Proxy'))
if not initial:
print(args[0] + ": invalid proxy")
return 1
print('\n'\
"Let's first transfer a simple object, for a class without\n"\
"operations, and print its contents. No factory is required\n"\
"for this.\n"\
"[press enter]")
sys.stdin.readline()
simple = initial.getSimple()
print("==> " + simple.message)
print('\n'\
"Yes, this worked. Now let's try to transfer an object for a class\n"\
"with operations as type ::Demo::Printer, without installing a factory\n"\
"first. This should give us a `no factory' exception.\n"\
"[press enter]")
sys.stdin.readline()
try:
printer, printerProxy = initial.getPrinter()
print(args[0] + ": Did not get the expected NoObjectFactoryException!")
sys.exit(false)
except Ice.NoObjectFactoryException as ex:
print("==>", ex)
print('\n'\
"Yep, that's what we expected. Now let's try again, but with\n"\
"installing an appropriate factory first. If successful, we print\n"\
"the object's content.\n"\
"[press enter]")
sys.stdin.readline()
factory = ObjectFactory()
self.communicator().addObjectFactory(factory, Demo.Printer.ice_staticId())
printer, printerProxy = initial.getPrinter()
print("==> " + printer.message)
print('\n'\
"Cool, it worked! Let's try calling the printBackwards() method\n"\
"on the object we just received locally.\n"\
"[press enter]")
sys.stdin.readline()
sys.stdout.write("==> ")
sys.stdout.flush()
printer.printBackwards()
print('\n'\
"Now we call the same method, but on the remote object. Watch the\n"\
"server's output.\n"\
"[press enter]")
sys.stdin.readline()
printerProxy.printBackwards()
print('\n'\
"Next, we transfer a derived object from the server as a base\n"\
"object. Since we haven't yet installed a factory for the derived\n"\
"class, the derived class (::Demo::DerivedPrinter) is sliced\n"\
"to its base class (::Demo::Printer).\n"\
"[press enter]")
sys.stdin.readline()
derivedAsBase = initial.getDerivedPrinter()
print("==> The type ID of the received object is \"" + derivedAsBase.ice_id() + "\"")
assert(derivedAsBase.ice_id() == Demo.Printer.ice_staticId())
print('\n'\
"Now we install a factory for the derived class, and try again.\n"\
"Because we receive the derived object as a base object, we\n"\
"we need to do a dynamic_cast<> to get from the base to the derived object.\n"\
"[press enter]")
sys.stdin.readline()
self.communicator().addObjectFactory(factory, Demo.DerivedPrinter.ice_staticId())
derived = initial.getDerivedPrinter()
print("==> The type ID of the received object is \"" + derived.ice_id() + "\"")
print('\n'\
"Let's print the message contained in the derived object, and\n"\
"call the operation printUppercase() on the derived object\n"\
"locally.\n"\
"[press enter]")
sys.stdin.readline()
print("==> " + derived.derivedMessage)
sys.stdout.write("==> ")
sys.stdout.flush()
derived.printUppercase()
print('\n'\
"Finally, we try the same again, but instead of returning the\n"\
"derived object, we throw an exception containing the derived\n"\
"object.\n"\
"[press enter]")
sys.stdin.readline()
try:
initial.throwDerivedPrinter()
print(args[0] + "Did not get the expected DerivedPrinterException!")
sys.exit(false)
except Demo.DerivedPrinterException as ex:
derived = ex.derived
assert(derived)
print("==> " + derived.derivedMessage)
sys.stdout.write("==> ")
sys.stdout.flush()
derived.printUppercase()
print('\n'\
"That's it for this demo. Have fun with Ice!")
initial.shutdown()
return 0
app = Client()
sys.exit(app.main(sys.argv, "config.client"))
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