manifold/manifoldapi.py

   1 # Manifold API Python interface
   2 import xmlrpclib
   3
   4 from myslice.config import Config
   5
   6 from manifoldresult import ManifoldResult, ManifoldCode
   7
   8 debug=False
   9 debug=True
  10
  11 class ManifoldAPI:
  12
  13     def __init__(self, auth=None, cainfo=None):
  14
  15         config = Config()
  16         self.auth = auth
  17         self.cainfo = cainfo
  18         self.errors = []
  19         self.trace = []
  20         self.calls = {}
  21         self.multicall = False
  22         self.url = config.manifold_url
  23         self.server = xmlrpclib.Server(self.url, verbose=False, allow_none=True)
  24
  25     def __repr__ (self): return "ManifoldAPI[%s]"%self.url
  26
  27     def __getattr__(self, methodName):
  28         def func(*args, **kwds):
  29             if (debug):
  30                 print "entering ManifoldAPI.%s"%methodName,
  31                 print "args",args,
  32                 print "kwds",kwds
  33             try:
  34                 result=getattr(self.server, methodName)(self.auth, *args, **kwds)
  35                 if debug:
  36                     print '===> backend call',methodName, self.auth, self.url,'->',
  37                     if not result:                        print "[no/empty result]"
  38                     elif isinstance (result,str):         print "result is '%s'"%result
  39                     elif isinstance (result,list):        print "result is a %d-elts list"%len(result)
  40                     else:                                 print "[dont know how to display result]"
  41                 return ManifoldResult (code=ManifoldCode.SUCCESS, value=result)
  42             except xmlrpclib.Fault, error:
  43                 ### xxx this is very rough for now
  44                 # until we have some agreement about how the API calls should return error conditions
  45                 # in some less unpolite way than this anoanymous exception, we assume it's a problem with the session
  46                 # that needs to be refreshed
  47                 if debug: print "Session Expired"
  48                 if error.faultCode == 8002:
  49                     reason="most likely your session has expired"
  50                     reason += " (the manifold API has no unambiguous error reporting mechanism yet)"
  51                     return ManifoldResult (code=ManifoldCode.SESSION_EXPIRED, output=reason)
  52             except Exception,error:
  53                 print "ManifoldAPI: unexpected exception",error
  54                 return ManifoldResult (code=ManifoldResult.UNKNOWN_ERROR, output="%s"%error)
  55         return func
  56
  57     def send_manifold_query (self, manifold_query):
  58         (action,subject)= (manifold_query.action,manifold_query.subject)
  59         if action=='get':
  60             # use self.Get rather than self.server.Get so we catch exceptions as per __getattr__
  61             return self.Get(subject, manifold_query.filters, {}, manifold_query.fields)
  62         # xxx...
  63         else:
  64             print "WARNING: ManifoldAPI.send_manifold_query: only 'get' implemented for now"