from myslice.config import Config
-from manifoldresult import ManifoldResult, ManifoldCode
+from manifoldresult import ManifoldResult, ManifoldCode, ManifoldException
debug=False
debug=True
def __repr__ (self): return "ManifoldAPI[%s]"%self.url
+ # a one-liner to give a hint of what the return value looks like
+ def _print_result (self, result):
+ if not result: print "[no/empty result]"
+ elif isinstance (result,str): print "result is '%s'"%result
+ elif isinstance (result,list): print "result is a %d-elts list"%len(result)
+ else: print "[dont know how to display result]"
+
# xxx temporary code for scaffolding a ManifolResult on top of an API that does not expose error info
# as of march 2013 we work with an API that essentially either returns the value, or raises
# an xmlrpclib.Fault exception with always the same 8002 code
# a SESSION_EXPIRED code
def __getattr__(self, methodName):
def func(*args, **kwds):
- if (debug):
- print "entering ManifoldAPI.%s"%methodName,
- print "args",args,
- print "kwds",kwds
try:
+ if debug: print "====> ManifoldAPI.%s"%methodName,"auth",self.auth,"args",args,"kwds",kwds
result=getattr(self.server, methodName)(self.auth, *args, **kwds)
if debug:
- print '===> backend call',methodName, self.auth, self.url,'->',
- if not result: print "[no/empty result]"
- elif isinstance (result,str): print "result is '%s'"%result
- elif isinstance (result,list): print "result is a %d-elts list"%len(result)
- else: print "[dont know how to display result]"
- return ManifoldResult (code=ManifoldCode.SUCCESS, value=result)
+ print '<==== backend call %s(*%s,**%s) returned'%(methodName,args,kwds),
+ print '.ctd. Authmethod=',self.auth['AuthMethod'], self.url,'->',
+ self._print_result(result)
+ ### attempt to cope with old APIs and new APIs
+ if isinstance (result, dict) and 'code' in result:
+ if debug: print "taken as new API"
+ # this sounds like a result from a new API
+ # minimal treatment is required, but we do want to turn this into a
+ # class instance
+ if result['code'] != 2: # in the manifold world, this can be either
+ # 0 (ok) 1 (partial result) or 2 (which means error)
+ if debug: print "OK (new API)"
+ return ManifoldResult(code=result['code'], value=result['value'])
+ else:
+ if debug: print "KO (new API) - raising ManifoldException"
+ raise ManifoldException(ManifoldResult(code=result['code'], output=result['description']))
+ else:
+ if debug: print "taken as old API"
+ # we're talking to an old API
+ # so if we make it here it should mean success
+ return ManifoldResult (code=ManifoldCode.SUCCESS, value=result)
except xmlrpclib.Fault, error:
### xxx this is very rough for now
# until we have some agreement about how the API calls should return error conditions
- # in some less unpolite way than this anoanymous exception, we assume it's a problem with the session
+ # in some less unpolite way than this anonymous exception, we assume it's a problem with the session
# that needs to be refreshed
- if debug: print "Session Expired"
if error.faultCode == 8002:
+ if debug: print "KO (old API - 8002) - raising ManifoldException"
reason="most likely your session has expired"
reason += " (the manifold API has no unambiguous error reporting mechanism yet)"
- return ManifoldResult (code=ManifoldCode.SESSION_EXPIRED, output=reason)
+ import traceback
+ traceback.print_exc()
+ raise ManifoldException ( ManifoldResult (code=ManifoldCode.SESSION_EXPIRED, output=reason))
+ else:
+ if debug: print "KO (old API - other) - raising ManifoldException"
+ reason="xmlrpclib.Fault with faultCode = %s (not taken as session expired)"%error.faultCode
+ raise ManifoldException ( ManifoldResult (code=ManifoldCode.UNKNOWN_ERROR, output=reason))
except Exception,error:
- print "ManifoldAPI: unexpected exception",error
- return ManifoldResult (code=ManifoldResult.UNKNOWN_ERROR, output="%s"%error)
+ if debug: print "KO (unexpected exception)",error
+ raise ManifoldException ( ManifoldResult (code=ManifoldCode.UNKNOWN_ERROR, output="%s"%error) )
return func
def send_manifold_query (self, query):
- (action,subject)= (query.action,query.subject)
- # use e.g. self.Get rather than self.server.Get so we catch exceptions as per __getattr__
- if action=='get':
-# this makes the backend to squeak and one can't login anymore...
-# return self.Get(subject, query.filters, query.timestamp, query.fields)
- return self.Get(subject, query.filters, {}, query.fields)
- if action=='update':
- return self.Update(subject, query.filters, query.params, query.fields)
- else:
- warning="WARNING: ManifoldAPI.send_manifold_query: %s not implemented for now"%action
- print warning
- return ManifoldResult(code=ManifoldCode.NOT_IMPLEMENTED, output=warning)
+ # We use a dictionary representation of the query for forwarding it to the API
+ ret = self.forward(query.to_dict())
+ if debug:
+ print "="*80
+ print "Result:"
+ print ret
+ print "="*80
+ return ret