root / kamaki / clients / commissioning / callpoint.py @ b4368e33
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# Copyright 2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from kamaki.clients.commissioning.specificator import CanonifyException |
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from kamaki.clients.commissioning.exception import CorruptedError |
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from kamaki.clients.commissioning.exception import InvalidDataError |
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from kamaki.clients.commissioning.exception import ReturnButFail |
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from kamaki.clients.commissioning.importing import imp_module |
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from re import compile as re_compile, sub as re_sub |
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class Callpoint(object): |
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api_spec = None
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CorruptedError = CorruptedError |
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InvalidDataError = InvalidDataError |
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original_calls = None
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def __init__(self, connection=None): |
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from json import loads, dumps |
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self.json_loads = loads
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self.json_dumps = dumps
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self.init_connection(connection)
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original_calls = {} |
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self.original_calls = original_calls
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canonifier = self.api_spec
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if canonifier is None: |
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m = "No api spec given to '%s'" % (type(self).__name__,) |
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raise NotImplementedError(m) |
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for call_name, call_doc in canonifier.call_docs(): |
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if hasattr(self, call_name): |
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# don't crash: wrap the function instead
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#m = ( "Method '%s' defined both in natively "
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# "in callpoint '%s' and in api spec '%s'" %
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# (call_name,
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# type(self).__name__,
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# type(canonifier).__name__) )
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#raise ValueError(m)
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call_func = getattr(self, call_name) |
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if not callable(call_func): |
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m = ( "api spec '%s', method '%s' is not a "
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"callable attribute in callpoint '%s'" %
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( type(canonifier).__name__,
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call_name, |
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type(self).__name ) ) |
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raise ValueError(m) |
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original_calls[call_name] = call_func |
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def mk_call_func(): |
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local_call_name = call_name |
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def call_func(**data): |
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return self.make_call(local_call_name, data) |
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call_func.__name__ = call_name |
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call_func.__doc__ = call_doc |
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return call_func
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setattr(self, call_name, mk_call_func()) |
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def init_connection(self, connection): |
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pass
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def commit(self): |
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pass
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def rollback(self): |
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pass
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def do_make_call(self, call_name, data): |
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raise NotImplementedError |
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def validate_call(self, call_name): |
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return hasattr(self, call_name) |
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def make_call_from_json_description(self, json_description): |
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try:
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description = self.json_loads(json_description)
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except ValueError, e: |
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m = "Cannot load json description"
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raise self.InvalidDataError(m) |
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data = self.make_call_from_description(description)
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json_data = self.json_dumps(data) if data is not None else None |
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return json_data
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def make_call_from_description(self, description): |
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try:
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call_name = description['call_name']
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call_data = description['call_data']
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except (TypeError, KeyError), e: |
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m = "Invalid description"
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raise self.InvalidDataError(m, e) |
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return self.make_call(call_name, call_data) |
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def make_call_from_json(self, call_name, json_data): |
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if json_data:
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try:
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data = self.json_loads(json_data)
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except ValueError, e: |
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m = "Cannot load json data"
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raise self.InvalidDataError(m, e) |
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else:
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data = None
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data = self.make_call(call_name, data)
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json_data = self.json_dumps(data)
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return json_data
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def make_call(self, call_name, data): |
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if call_name.startswith('_'): |
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m = "Invalid call '%s'" % (call_name,)
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raise self.InvalidDataError(m) |
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canonifier = self.api_spec
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try:
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data = canonifier.canonify_input(call_name, data) |
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except CanonifyException, e:
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m = "Invalid input to call '%s'" % (call_name,)
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raise self.InvalidDataError(m, e) |
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if not self.validate_call(call_name): |
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m = "Cannot find specified call '%s'" % (call_name,)
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raise self.CorruptedError(m) |
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call_func = self.original_calls.get(call_name, None) |
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try:
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if call_func is None: |
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data = self.do_make_call(call_name, data)
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else:
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data = call_func(**data) |
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self.commit()
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except ReturnButFail, e:
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self.rollback()
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data = e.data |
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except Exception, e: |
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self.rollback()
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raise
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try:
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data = canonifier.canonify_output(call_name, data) |
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except CanonifyException, e:
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m = "Invalid output from call '%s'" % (call_name,)
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raise self.CorruptedError(m, e) |
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return data
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def mkcallargs(**kw): |
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return kw
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versiontag_pattern = re_compile('[^a-zA-Z0-9_-]')
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def mk_versiontag(version): |
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if not version or version == 'v': |
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return '' |
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return '_' + re_sub(versiontag_pattern, '_', version) |
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def get_callpoint(pointname, version=None, automake=None, **kw): |
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versiontag = mk_versiontag(version) |
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components = pointname.split('.')
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appname = components[0]
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if len(components) < 2: |
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raise ValueError("invalid pointname '%s'" % (pointname,)) |
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category = components[1]
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if not category or category not in ['clients', 'servers']: |
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raise ValueError("invalid pointname '%s'" % (pointname,)) |
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modname = ('%s.callpoint.API_Callpoint%s'
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% (pointname, versiontag)) |
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try:
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API_Callpoint = imp_module(modname) |
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return API_Callpoint
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except ImportError: |
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if not automake: |
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raise
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if category != 'clients': |
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m = ("Can only auto-make callpoint in 'clients' not '%s'" % (category,))
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raise ValueError(m) |
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components = components[1:]
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if not components: |
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raise ValueError("invalid pointname '%s'" % (pointname)) |
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pointname = '.'.join(components)
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if pointname == 'quotaholder': |
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apiname = 'quotaholder.api.QuotaholderAPI'
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else:
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apiname = '%s.api.API_Spec%s' % (pointname, versiontag)
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API_Spec = imp_module(apiname) |
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basename = 'commissioning.clients.%s.API_Callpoint' % (automake,)
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BaseCallpoint = imp_module(basename) |
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stupidpython = (appname, |
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version if version is not None else 'v', |
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pointname, |
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automake) |
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class AutoCallpoint(BaseCallpoint): |
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appname, version, pointname, automake = stupidpython |
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api_spec = API_Spec() |
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return AutoCallpoint
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