pickletest.py :  » Development » Pyro » Pyro-3.10 » examples » pickle » Python Open Source

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Python Open Source » Development » Pyro 
Pyro » Pyro 3.10 » examples » pickle » pickletest.py
import Pyro.core
import Pyro.protocol
import Pyro.errors
import Pyro.naming
import Pyro.EventService.Clients
import Pyro.EventService.Server
import Pyro.configuration

import cPickle as pickle

import sys
if sys.version_info < (2,5):
  raise SystemExit("this test only runs on Python 2.5 or newer")

# a list of all classes to be tested for pickleability
classes=[
  Pyro.configuration.Config,
  Pyro.core.ObjBase,
  Pyro.core.CallbackObjBase,
  
  Pyro.core.PyroURI,
  Pyro.core.DynamicProxy,
  Pyro.core.DynamicProxyWithAttrs,
  
  Pyro.errors.PyroError,
  Pyro.errors.NamingError,
  Pyro.errors.PyroExceptionCapsule,
  
  Pyro.naming.NameServerLocator,
  Pyro.naming.NameServerProxy,
  
  Pyro.protocol.PYROAdapter,
  # Pyro.protocol.PYROSSLAdapter,
  Pyro.protocol.DefaultConnValidator,
  Pyro.protocol.BasicSSLValidator,
  Pyro.protocol.LocalStorage,
  
  Pyro.EventService.Server.Event,
  Pyro.EventService.Server.EventService,
]

# various helper constructors follow
def createConfig(clazz):
  c=clazz()
  c.setup(None)
  return c
  
def createNameserverProxy(clazz):
  locator=Pyro.naming.NameServerLocator(identification="identify")
  ns=locator.getNS()
  if isinstance(ns,clazz):
    return ns
  raise TypeError("wrong class")

def createPyroAdapter(clazz):
  a=clazz()
  a.setOneway(["method"])
  a.setTimeout(42)
  a.setIdentification("identify")
  return a

# A table of object constructors for various types.
# If a type isn't present, its base type is tried.
constructors={
  object: lambda c: c(),
  str: lambda c: c("test"),
  int: lambda c: c(42),
  dict: lambda c: c({"test":42}),
  Exception: lambda c: c("errormessage"),
  Pyro.configuration.Config: createConfig,
  Pyro.core.PyroURI: lambda c: c("PYRO://127.0.0.1:9999/objectid"),
  Pyro.core.DynamicProxy: lambda c: c("PYRO://127.0.0.1:9999/objectid"),
  Pyro.errors.PyroExceptionCapsule: lambda c: c(Exception("errormessage"),"some error"),
  Pyro.naming.NameServerProxy: createNameserverProxy,
  Pyro.naming.NameServerLocator: lambda c: c(identification="identify"),
  Pyro.EventService.Server.Event: lambda c: c("subject","message"),
  Pyro.protocol.PYROAdapter: createPyroAdapter,
}

# check if objects are the same according to various attributes
def compareObjects(obj1,obj2):
  if type(obj1) is type(obj2):
    t=type(obj1)
    if t in (str,int,dict,tuple):
      return obj1==obj2
    if t in (Pyro.configuration.Config, Pyro.core.PyroURI):
      return obj1==obj2
    if t in (Pyro.core.ObjBase, Pyro.core.CallbackObjBase):
      return obj1.objectGUID==obj2.objectGUID and \
           obj1.delegate==obj2.delegate and \
           obj1.lastUsed==obj2.lastUsed
    if isinstance(obj1, Exception):
      return obj1.args==obj2.args
    if t is Pyro.errors.PyroExceptionCapsule or obj1.__class__==Pyro.errors.PyroExceptionCapsule:
      return type(obj1.excObj)==type(obj2.excObj) and \
           obj1.__class__==obj2.__class__ and\
           obj1.excObj.args==obj2.excObj.args and \
           obj1.args==obj2.args
    if t is Pyro.naming.NameServerLocator:
      return obj1.identification==obj2.identification
    if t in (Pyro.naming.NameServerProxy,Pyro.core.DynamicProxy,Pyro.core.DynamicProxyWithAttrs):
      return obj1.URI==obj2.URI and \
           obj1.objectID==obj2.objectID and \
           compareObjects(obj1.adapter,obj2.adapter)
    if t is Pyro.protocol.PYROAdapter:
      return obj1.ident==obj2.ident and \
           obj1.timeout==obj2.timeout and \
           obj1.onewayMethods==obj2.onewayMethods
    if t in (Pyro.protocol.LocalStorage, Pyro.protocol.DefaultConnValidator,
         Pyro.protocol.BasicSSLValidator, Pyro.EventService.Server.Event,
         Pyro.EventService.Server.EventService, Pyro.EventService.Clients.Publisher):
      return obj1.__dict__==obj2.__dict__
    print "NO COMPARE FOR TYPE",t
  return False
    
# Create a list of objects to be tested for pickleability. 
# An object is created for every class in the class list.
def createTestObjects(classes, verbose=False):
  def createObject(clazz):
    def findConstructor(clazz):
      if not clazz:
        return None,None
      if clazz in constructors:
        return constructors[clazz],clazz
      return findConstructor(clazz.__base__)
    constr,clazz2=findConstructor(clazz)
    return constr(clazz),clazz in constructors,clazz2
  objects=[]
  for clazz in classes:
    obj,specified,clazz2=createObject(clazz)
    objects.append(obj)
    if not specified and verbose:
      print "Warning, no specific constructor for",clazz.__name__,", used:",clazz2.__name__
  return objects

# Do the pickle test!
def pickletest(objects, protocol):
  print "----------------------------"
  print "Pickle test with protocol",protocol
  goodcount=0
  for obj in objects:
    print obj.__class__.__name__,":",
    try:
      p=pickle.dumps(obj,protocol=protocol)
      try:
        obj2=pickle.loads(p)
        try:
          if compareObjects(obj,obj2):
            print "OK"
            goodcount+=1
          else:
            print "COMPARE FAIL, DICT=",obj.__dict__
        except Exception,x:
          print "COMPARE FAIL:",x
      except Exception,x:
        print "LOADS FAIL:",x
    except Exception,x:
      print "DUMPS FAIL:",x
  print
  errorcount=len(objects)-goodcount
  print "FAILURES:",errorcount, "   OK:",goodcount
  print
  return errorcount
  
# We need to check some special cases more thorougly.
def specialcases(protocol):
  print "SPECIAL CASES"
  errorcount=0
  locator=Pyro.naming.NameServerLocator()
  ns=locator.getNS()
  print "PyroAdapter bound to URI:",
  a=createPyroAdapter(Pyro.protocol.PYROAdapter)
  assert not hasattr(a,"URI")
  assert not hasattr(a,"conn")
  a.bindToURI(ns.URI)
  assert isinstance(a.conn, Pyro.protocol.TCPConnection)
  assert isinstance(a.URI, Pyro.core.PyroURI)
  try:
    s=pickle.dumps(a,protocol=protocol)
    a2=pickle.loads(s)
    assert not hasattr(a,"conn"), "original cannot have conn because of release"
    assert not hasattr(a2,"conn"), "pickled obj cannot have conn"
    if compareObjects(a,a2):
      print "OK"
    else:
      errorcount+=1
      print "COMPARE FAIL, DICT=",a.__dict__
  except Exception,x:
    errorcount+=1
    print "ERROR",x
  print "DynamicProxy bound to URI:",
  p=Pyro.core.getProxyForURI(ns.URI)
  assert not hasattr(p.adapter,"conn")
  p.ping()
  assert isinstance(p.adapter.conn, Pyro.protocol.TCPConnection)
  try:
    s=pickle.dumps(p,protocol=protocol)
    p2=pickle.loads(s)
    assert not hasattr(p2.adapter,"conn"), "pickled obj cannot have conn"
    assert p.adapter is not None, "original must still have conn"
    if compareObjects(p,p2):
      print "OK"
    else:
      errorcount+=1
      print "COMPARE FAIL, DICT=",p.__dict__
  except Exception,x:
    errorcount+=1
    print "ERROR",x
  print "DynamicAttrProxy bound to URI:",
  p=Pyro.core.getAttrProxyForURI(ns.URI)
  assert not hasattr(p.adapter,"conn")
  p.ping()
  assert isinstance(p.adapter.conn, Pyro.protocol.TCPConnection)
  try:
    s=pickle.dumps(p,protocol=protocol)
    p2=pickle.loads(s)
    assert not hasattr(p2.adapter,"conn"), "pickled obj cannot have conn"
    assert p.adapter is not None, "original must still have conn"
    if compareObjects(p,p2):
      print "OK"
    else:
      errorcount+=1
      print "COMPARE FAIL, DICT=",p.__dict__
  except Exception,x:
    errorcount+=1
    print "ERROR",x
  return errorcount

# let's go
def main():
  #initNameServer()
  errorcount=0
  objects=createTestObjects(classes, verbose=True)
  for protocol in range(pickle.HIGHEST_PROTOCOL+1):
    errorcount+=pickletest(objects,protocol)
    errorcount+=specialcases(protocol)  
    objects=createTestObjects(classes, verbose=False)  # new set of objects for next cycle
  print
  print "TOTAL ERRORS:",errorcount   # must be zero!
  
if __name__=="__main__":
  main()
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