from myslice.config import Config
-from manifoldresult import ManifoldResult, ManifoldCode
+from django.contrib import messages
+from manifoldresult import ManifoldResult, ManifoldCode, ManifoldException
+from manifold.core.result_value import ResultValue
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)
- ### attempt to cope with old APIs and new APIs
- if isinstance (result, dict) and 'code' in result:
- # this sounds like a result from a new API, leave it untouched
- return result # jordan
- else:
- if debug:
- print '<=== backend call', methodName, args, kwds
- print '.... ctd', 'Authmethod=',self.auth['AuthMethod'], 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)
- 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 anonymous exception, we assume it's a problem with the session
- # that needs to be refreshed
- if error.faultCode == 8002:
- 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)
- else:
- reason="xmlrpclib.Fault with faultCode = %s (not taken as session expired)"%error.faultCode
- return ManifoldResult (code=ManifoldCode.UNKNOWN_ERROR, output=reason)
+ if debug:
+ print '<==== backend call %s(*%s,**%s) returned'%(methodName,args,kwds),
+ print '.ctd. Authmethod=',self.auth['AuthMethod'], self.url,'->',
+ self._print_result(result)
+
+ return ResultValue(**result)
+
except Exception,error:
- print "ManifoldAPI: unexpected exception",error
- return ManifoldResult (code=ManifoldCode.UNKNOWN_ERROR, output="%s"%error)
- return func
+ # XXX Connection refused for example
+ print "** API ERROR **"
+ import traceback
+ traceback.print_exc()
+ if debug: print "KO (unexpected exception)",error
+ raise ManifoldException ( ManifoldResult (code=ManifoldCode.UNKNOWN_ERROR, output="%s"%error) )
- def send_manifold_query (self, query):
- # We use a dictionary representation of the query for forwarding it to the API
- ret = self.forward(query.to_dict())
- print "="*80
- print "Result:"
- print ret
- print "="*80
- print ret
- return ret
+ return func
-#old# (action,subject)= (query.action,query.subject)
-#old# # use e.g. self.Get rather than self.server.Get so we use the __getattr__ code
-#old# if action=='get':
-#old## this makes the backend to squeak and one can't login anymore...
-#old## return self.Get(subject, query.filters, query.timestamp, query.fields)
-#old# return self.Get(subject, query.filters, {}, query.fields)
-#old# elif action=='update':
-#old# answer=self.Update(subject, query.filters, query.params, query.fields)
-#old# if not isinstance (answer, ManifoldResult): print "UNEXECPECTED answer", answer
-#old# return answer
-#old# else:
-#old# warning="WARNING: ManifoldAPI.send_manifold_query: %s not implemented for now"%action
-#old# print warning
-#old# print 3
-#old# return ManifoldResult(code=ManifoldCode.NOT_IMPLEMENTED, output=warning)