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#
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# Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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# All rights reserved.
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# This component and the accompanying materials are made available
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# under the terms of "Eclipse Public License v1.0"
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# which accompanies this distribution, and is available
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# at the URL "http://www.eclipse.org/legal/epl-v10.html".
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#
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# Initial Contributors:
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# Nokia Corporation - initial contribution.
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#
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# Contributors:
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#
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# Description:
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#
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##
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# @author Teemu Rytkonen
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import getpass
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import StringIO
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import os
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import re
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import copy
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import logging
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import httplib
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import urllib, urllib2
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import simplejson
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import posixpath
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from cone.public import *
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from cone.carbon import persistentjson, model
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from cone.storage import authenticate
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class WebStorage(api.Storage):
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"""
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A general base class for all storage type classes
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@param path : the reference to the root of the storage.
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"""
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def __init__(self, path, mode="a", **kwargs):
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api.Storage.__init__(self,path)
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self.mode = mode
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self.extapi = CarbonExtapi(path, **kwargs)
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self.persistentmodule = persistentjson
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# resource cache is a intermediate solution to create a mapping between carbon objects and Configuration project
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self._resource_cache = None
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def _create_resource(self, path, object):
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"""
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Create a new resource (configuration|featurelist) to carbon storage.
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"""
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# Test the path, whether it is a featurelist or configuration
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try:
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object_type = object.meta.get('type')
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except (TypeError,AttributeError):
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logging.getLogger('cone').error('Cannot dump configuration %s to webstorage without a type.' % path)
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return False
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carbonpath = persistentjson.CarbonResourceMapper().map_confml_resource(object_type, path)
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if object_type == 'featurelist':
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# Create a featurelist
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success = self.extapi.create_featurelist(carbonpath, object)
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if success:
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self.resource_cache.add_resource_link(path, carbonpath)
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return success
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else:
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# Create a configuration
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success = self.extapi.create_configuration(carbonpath, object)
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if success:
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self.resource_cache.add_resource_link(path, carbonpath)
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return success
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@classmethod
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def supported_storage(cls,path):
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"""
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Class method for determing if the given clas supports a storage by given path.
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E.g. http://foo.com/
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@param path:
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@return: Boolean value. True if the storage of the path is supported. False if not.
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"""
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if path.startswith('http://'):
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return True
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else:
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return False
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@property
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def resource_cache(self):
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"""
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Returns a resource cache dictionary of all the resources inside the Carbon storage. Works as an intermediate
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solution to link Configuration project concepts to Carbon storage
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"""
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if not self._resource_cache:
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self._resource_cache = ResourceCache()
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reslist = self.extapi.list_resources("/", True)
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# Append all resources to resource cache
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for res in reslist:
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self._resource_cache.add_resource(res)
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# if isinstance(res, model.ConfigurationResource):
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# self._resource_cache.add_configuration(res)
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# elif isinstance(res, model.FeatureListResource):
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# self._resource_cache.add_featurelist(res)
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return self._resource_cache
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def list_resources(self,path, recurse=False, empty_folders=False):
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"""
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find the resources under certain path/path
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@param path : reference to path where resources are searched
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@param recurse : defines whether to return resources directly under the path or does the listing recurse to subfolders.
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Default value is False. Set to True to enable recursion.
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@param empty_folders: parameters that defined whether empty folders are included. This parameter is ignored
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in WebStorage.
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"""
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return self.resource_cache.list_resources(path,recurse)
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def open_resource(self,path,mode="r"):
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path = utils.resourceref.remove_begin_slash(path)
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if self.resource_cache.get_resource_object(path):
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return self.resource_cache.get_resource_object(path)
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elif self.resource_cache.get_resource_link(path):
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path = self.resource_cache.get_resource_link(path)
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# path = path.replace(".confml", ".configuration")
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# path = utils.resourceref.join_refs([self.get_current_path(), path])
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try:
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if self.get_mode(mode) == self.MODE_READ:
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strio = self.extapi._get_stringio_from_path(path)
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elif self.get_mode(mode) == self.MODE_APPEND:
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strio = self.extapi._get_stringio_from_path(path)
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strio.seek(0, os.SEEK_END)
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elif self.get_mode(mode) == self.MODE_WRITE:
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strio = StringIO.StringIO()
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else:
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raise StorageException("Unrecognized mode %s" % mode)
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res = WebResource(self,path,mode,strio)
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self.__opened__(res)
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return res
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except KeyError:
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raise exceptions.NotResource("The given resource is not found %s" % path)
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def is_resource(self,path):
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return self.resource_cache.is_resource(path)
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# path = path.replace(".confml", ".configuration")
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# path = utils.resourceref.join_refs([self.get_current_path(), path])
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# try:
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# query = urllib.quote(self._get_action_url('is_resource', path))
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# self.conn.request("GET", query)
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# resp = self.conn.getresponse()
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# reader = persistentjson.HasResourceReader()
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# return reader.loads(resp.read())
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# except exceptions.NotFound:
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# return False
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def save_resource(self, res):
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"""
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Close resource is no-operation action with webstorage for now
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"""
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return
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def close_resource(self, path):
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"""
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Close resource is no-operation action with webstorage
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"""
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return
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def export_resources(self, paths, storage, empty_folders=False):
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for path in paths:
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if not self.is_resource(path):
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logging.getLogger('cone').warning("The given path is not a Resource in this storage %s! Ignoring from export!" % path)
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continue
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wres = storage.open_resource(path,'wb')
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res = self.open_resource(path,"rb")
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wres.write(res.read())
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wres.close()
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res.close()
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def unload(self, path, object):
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"""
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Dump a given object to the storage (reference is fetched from the object)
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@param object: The object to dump to the storage, which is expected to be an instance
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of Base class.
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"""
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# Add the current path in front of the given path
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path = utils.resourceref.join_refs([self.get_current_path(), path])
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print "unload %s" % path
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if not isinstance(object, api.Configuration):
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raise exceptions.StorageException("Cannot dump object type %s" % object.__class__)
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# Skip the unload storing to storage if the storage is opened in read mode
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if self.get_mode(self.mode) != api.Storage.MODE_READ:
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if self.resource_cache.get_resource_link(path):
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path = self.resource_cache.get_resource_link(path)
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else:
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""" otherwise create the new resource first before update"""
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if self._create_resource(path, object):
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path = self.resource_cache.get_resource_link(path)
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else:
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# Creation failed
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logging.getLogger('cone').error('Creation of %s resource failed' % path)
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return
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data = persistentjson.dumps(object)
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self.extapi.update_resource(path, data)
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else:
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raise exceptions.StorageException("Cannot dump object to readonly storage")
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return
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def load(self, path):
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"""
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Load resource from a path.
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"""
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# Check if the object is already cached or has a cached link to another resource to load
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path = utils.resourceref.remove_begin_slash(path)
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print "load %s" % path
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if self.resource_cache.get_resource_link(path):
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path = self.resource_cache.get_resource_link(path)
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elif self.resource_cache.get_mapped_resource(path):
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path = self.resource_cache.get_mapped_resource(path)
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elif not utils.resourceref.get_ext(path) == "confml":
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raise exceptions.StorageException("Cannot load reference type %s" % utils.resourceref.get_ext(path))
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else:
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# Add the current path in front of the given path
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path = utils.resourceref.join_refs([self.get_current_path(), path])
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if not self.is_resource(path):
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raise exceptions.NotResource("No such %s resource!" % path)
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res = self.open_resource(path,"r")
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# read the resource with persistentmodule
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try:
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obj = self.persistentmodule.loads(res.read())
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#obj.set_path(path)
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res.close()
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return obj
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except exceptions.ParseError,e:
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logging.getLogger('cone').error("Resource %s parsing failed with exception: %s" % (path,e))
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# returning an empty config in case of xml parsing failure.
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return api.Configuration(path)
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def close(self):
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""" No operation in web storage close """
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pass
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class WebResource(api.Resource):
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def __init__(self,storage,path,mode,handle):
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api.Resource.__init__(self,storage,path,mode)
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self.handle = handle
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def read(self,bytes=0):
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if bytes == 0:
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return self.handle.read()
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else:
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return self.handle.read(bytes)
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def write(self,string):
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if self.get_mode() == api.Storage.MODE_READ:
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raise exceptions.StorageException("Writing attempted to %s in read-only mode." % self.path)
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else:
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self.handle.write(string)
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def truncate(self,size=0):
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raise exceptions.NotSupportedException()
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def flush(self):
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self.storage.flush_resource(self)
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def close(self):
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self.storage.close_resource(self)
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self.handle.close()
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def get_size(self):
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if self.get_mode() == api.Storage.MODE_WRITE:
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raise exceptions.StorageException("Reading resource size attempted to %s in write-only mode." % self.path)
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return len(self.handle.getvalue())
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def getvalue(self):
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return self.handle.getvalue()
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class CarbonExtapi(object):
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ACTIONS = { 'open_resource' : 'get_resource',
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'list_resources' : 'list_resources',
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'is_resource' : 'has_resource',
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'put_resource' : 'put_resource',
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'update_resource' : 'update_resource' }
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"""
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A general container for Carbon extapi action
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"""
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def __init__(self, path, **kwargs):
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self.path = path
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self.server_path = ''
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self.service_path = ''
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if path.startswith('http://'):
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path = path.replace('http://','',1)
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pathelems = path.split('/',1)
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self.server_path = pathelems[0]
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if len(pathelems) > 1:
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self.service_path = pathelems[1]
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self._username = kwargs.get('username', None)
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self._password = kwargs.get('password', None)
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authhandler = authenticate.CarbonAuthHandler()
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authhandler.add_password(self.username, self.password)
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self.conn = urllib2.build_opener(urllib2.HTTPCookieProcessor, authhandler, urllib2.ProxyHandler({}))
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@property
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def username(self):
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if self._username == None:
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self._username = getpass.getuser()
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return self._username
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@property
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def password(self):
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if self._password == None:
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self._password = getpass.getpass()
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return self._password
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def checklogin(self):
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"""
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Checks that we are logged in by loading the main page.
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If we are not logged in it will redirect us to login page.
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"""
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loginurl = "http://%(host)s/" % dict(host=self.server_path)
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loginreq = urllib2.Request(loginurl)
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print 'Checking login by opening URL %s ...' % loginurl
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try:
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resp = self.conn.open(loginreq)
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except urllib2.URLError, e:
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print str(e)
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return False
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return True
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def _get_stringio_from_path(self,path):
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"""
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return a StringIO object containing the data under a given path.
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@return: StringIO buffer
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@raise exception.NotResource: if the resource under path is not found
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"""
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path = utils.resourceref.remove_begin_slash(path)
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action_url = self._get_action_url('open_resource', path)
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req = urllib2.Request(action_url)
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try:
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resp = self.conn.open(req)
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bytes = resp.read()
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strio = StringIO.StringIO(bytes)
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return strio
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except urllib2.HTTPError,e:
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raise exceptions.NotResource("The given path %s could not be retrived from this storage. Server returned status %s." % (path, e))
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def _get_action_url(self, action, path, **kwargs):
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path = utils.resourceref.remove_begin_slash(path)
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return "%s/%s/%s" % (self.path,self.ACTIONS[action], urllib.quote(path))
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def list_resources_for_type(self,path,type, recurse=False):
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"""
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find the resources under certain path/path
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@param path : reference to path where resources are searched
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@param type : resources for particular carbon specific type.
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@param recurse : defines whether to return resources directly under the path or does the listing recurse to subfolders.
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Default value is False. Set to True to enable recursion.
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"""
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try:
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path = utils.resourceref.join_refs([path,'.'+type])
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path = utils.resourceref.remove_begin_slash(path)
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query = self._get_action_url('list_resources', path)
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req = urllib2.Request(query)
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resp = self.conn.open(req)
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if resp.code == httplib.OK:
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bytes = resp.read()
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reader = persistentjson.ResourceListReader()
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reslist = reader.loads(bytes)
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return reslist
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else:
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return []
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except exceptions.NotFound:
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return []
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def list_resources(self,path, recurse=False):
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"""
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find the resources under certain path/path
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@param path : reference to path where resources are searched
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@param recurse : defines whether to return resources directly under the path or does the listing recurse to subfolders.
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Default value is False. Set to True to enable recursion.
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"""
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try:
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path = utils.resourceref.remove_begin_slash(path)
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query = self._get_action_url('list_resources', path)
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req = urllib2.Request(query)
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resp = self.conn.open(req)
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if resp.code == httplib.OK:
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bytes = resp.read()
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reslist = simplejson.loads(bytes)
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return reslist.get('resources',[])
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else:
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return []
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except exceptions.NotFound:
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return []
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def update_resource(self, path, data):
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"""
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Update a resource to carbon. The resource can be a CarbonConfiguration or FeatureList object.
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@param object: The object which is dumped to dict with persistentjson and then updated to server.
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404 |
"""
|
|
405 |
try:
|
|
406 |
path = utils.resourceref.remove_begin_slash(path)
|
|
407 |
query = self._get_action_url('update_resource', path)
|
|
408 |
jsondata = simplejson.dumps(data)
|
|
409 |
encdata = urllib.urlencode({'data' : jsondata})
|
|
410 |
req = urllib2.Request(query, encdata)
|
|
411 |
|
|
412 |
resp = self.conn.open(req)
|
|
413 |
if resp.code == httplib.OK:
|
|
414 |
bytes = resp.read()
|
|
415 |
respdata = simplejson.loads(bytes)
|
|
416 |
success = respdata.get('success') == True
|
|
417 |
if success:
|
|
418 |
logging.getLogger('cone').info('Carbon update succeeds to path %s.' % (respdata.get('path')))
|
|
419 |
else:
|
|
420 |
logging.getLogger('cone').error('Carbon update %s failed %s' % (path,respdata.get('errors')))
|
|
421 |
return success
|
|
422 |
else:
|
|
423 |
logging.getLogger('cone').error('Carbon update %s failed %s: %s' % (path,resp.code, resp))
|
|
424 |
return False
|
|
425 |
except urllib2.HTTPError,e:
|
|
426 |
utils.log_exception(logging.getLogger('cone'), "HTTPError in %s, %s" % (query,e))
|
|
427 |
return False
|
|
428 |
|
|
429 |
def create_feature(self,path, feature, parent=None):
|
|
430 |
"""
|
|
431 |
Create new Carbon feature based on Feature object.
|
|
432 |
@param path: The path to the featurelist where the feature is created.
|
|
433 |
@param feature: The feature object
|
|
434 |
@param parent: A possible parent feature ref
|
|
435 |
"""
|
|
436 |
try:
|
|
437 |
path = utils.resourceref.remove_begin_slash(path)
|
|
438 |
query = self._get_action_url('put_resource', path)
|
|
439 |
data = persistentjson.dumps(feature)
|
|
440 |
if parent:
|
|
441 |
data['parent'] = parent
|
|
442 |
jsondata = simplejson.dumps(data)
|
|
443 |
encdata = urllib.urlencode({'data' : jsondata})
|
|
444 |
req = urllib2.Request(query, encdata)
|
|
445 |
|
|
446 |
resp = self.conn.open(req)
|
|
447 |
if resp.code == httplib.OK:
|
|
448 |
bytes = resp.read()
|
|
449 |
respdata = simplejson.loads(bytes)
|
|
450 |
success = respdata.get('success') == True
|
|
451 |
if success:
|
|
452 |
logging.getLogger('cone').info('New Carbon feature created to path %s.' % (respdata.get('path')))
|
|
453 |
else:
|
|
454 |
logging.getLogger('cone').error('Feature %s creation failed %s' % (feature.fqr,respdata.get('errors')))
|
|
455 |
return success
|
|
456 |
else:
|
|
457 |
logging.getLogger('cone').error('Feature %s creation failed %s: %s' % (feature.fqr,resp.code, resp))
|
|
458 |
return False
|
|
459 |
except urllib2.HTTPError,e:
|
|
460 |
utils.log_exception(logging.getLogger('cone'), "HTTPError in %s, %s" % (query,e))
|
|
461 |
return False
|
|
462 |
|
|
463 |
def create_featurelist(self, path, featurelist):
|
|
464 |
"""
|
|
465 |
Create new Carbon featurelist to carbon.
|
|
466 |
@param featurelist: The FeatureList object which is created.
|
|
467 |
@return: tuple (success, created_path) where success indicates the success of the operation
|
|
468 |
and created_path is the newly created featurelist path on success.
|
|
469 |
"""
|
|
470 |
try:
|
|
471 |
path = utils.resourceref.remove_begin_slash(path)
|
|
472 |
query = self._get_action_url('put_resource', path)
|
|
473 |
data = persistentjson.FeatureListCreateWriter().dumps(featurelist)
|
|
474 |
jsondata = simplejson.dumps(data)
|
|
475 |
encdata = urllib.urlencode({'data' : jsondata})
|
|
476 |
req = urllib2.Request(query, encdata)
|
|
477 |
|
|
478 |
resp = self.conn.open(req)
|
|
479 |
if resp.code == httplib.OK:
|
|
480 |
bytes = resp.read()
|
|
481 |
respdata = simplejson.loads(bytes)
|
|
482 |
success = respdata.get('success') == True
|
|
483 |
newpath = respdata.get('path')
|
|
484 |
if success:
|
|
485 |
logging.getLogger('cone').info('New Carbon featurelist created to path %s.' % (newpath))
|
|
486 |
else:
|
|
487 |
logging.getLogger('cone').error('FeatureList %s creation failed %s' % (featurelist.path,respdata.get('errors')))
|
|
488 |
return (success, newpath)
|
|
489 |
else:
|
|
490 |
logging.getLogger('cone').error('FeatureList %s creation failed %s: %s' % (featurelist.path,resp.code, resp))
|
|
491 |
return (False,'')
|
|
492 |
except urllib2.HTTPError,e:
|
|
493 |
utils.log_exception(logging.getLogger('cone'), "HTTPError in %s, %s" % (query,e))
|
|
494 |
return (False,'')
|
|
495 |
|
|
496 |
def create_configuration(self, path, configuration):
|
|
497 |
"""
|
|
498 |
Create new Carbon configuration to carbon.
|
|
499 |
@param path: The path to the configuration
|
|
500 |
@param configuration: The CarbonConfiguration object
|
|
501 |
@return: tuple (success, created_path) where success indicates the success of the operation
|
|
502 |
and created_path is the newly created configuration path on success.
|
|
503 |
"""
|
|
504 |
try:
|
|
505 |
path = utils.resourceref.remove_begin_slash(path)
|
|
506 |
query = self._get_action_url('put_resource', path)
|
|
507 |
data = persistentjson.ConfigurationCreateWriter().dumps(configuration)
|
|
508 |
jsondata = simplejson.dumps(data)
|
|
509 |
encdata = urllib.urlencode({'data' : jsondata})
|
|
510 |
req = urllib2.Request(query, encdata)
|
|
511 |
|
|
512 |
resp = self.conn.open(req)
|
|
513 |
if resp.code == httplib.OK:
|
|
514 |
bytes = resp.read()
|
|
515 |
respdata = simplejson.loads(bytes)
|
|
516 |
success = respdata.get('success') == True
|
|
517 |
newpath = respdata.get('path')
|
|
518 |
if success:
|
|
519 |
logging.getLogger('cone').info('New Carbon configuration created to path %s.' % (newpath))
|
|
520 |
else:
|
|
521 |
logging.getLogger('cone').error('CarbonConfiguration %s creation failed %s' % (configuration.path,respdata.get('errors')))
|
|
522 |
return (success, newpath)
|
|
523 |
else:
|
|
524 |
logging.getLogger('cone').error('CarbonConfiguration %s creation failed %s: %s' % (configuration.path,resp.code, resp))
|
|
525 |
return (False,'')
|
|
526 |
except urllib2.HTTPError,e:
|
|
527 |
utils.log_exception(logging.getLogger('cone'), "HTTPError in %s, %s" % (query,e))
|
|
528 |
return (False,'')
|
|
529 |
|
|
530 |
class ResourceCache(object):
|
|
531 |
"""
|
|
532 |
Resource cache maintains a list of ConE resource names and their actual links to Carbon resources.
|
|
533 |
"""
|
|
534 |
def __init__(self):
|
|
535 |
self._cache = {}
|
|
536 |
|
|
537 |
def add_configuration(self, configuration):
|
|
538 |
"""
|
|
539 |
Add a list of Carbon configurations.
|
|
540 |
"""
|
|
541 |
|
|
542 |
# Create the configuration as a layer and configuration root
|
|
543 |
self._cache[configuration.get_path()] = configuration.path
|
|
544 |
rootconf_path = configuration.name+'.confml'
|
|
545 |
rootconf = model.CarbonConfiguration(rootconf_path)
|
|
546 |
rootconf.include_configuration(configuration.get_path())
|
|
547 |
self._cache[rootconf_path] = rootconf
|
|
548 |
|
|
549 |
def add_featurelist(self, featurelist):
|
|
550 |
"""
|
|
551 |
Add a list of Carbon configurations.
|
|
552 |
"""
|
|
553 |
# Add the feature list under feature list folder
|
|
554 |
self._cache["featurelists/"+featurelist.get_path()] = featurelist.get_carbon_path()
|
|
555 |
pass
|
|
556 |
|
|
557 |
def add_resource(self, resourcepath):
|
|
558 |
"""
|
|
559 |
Add a resource
|
|
560 |
"""
|
|
561 |
confmlpath = persistentjson.CarbonResourceMapper().map_carbon_resource(resourcepath)
|
|
562 |
self._cache[confmlpath] = resourcepath
|
|
563 |
|
|
564 |
def list_resources(self, path, recurse=False):
|
|
565 |
"""
|
|
566 |
List ConE resources under certain path
|
|
567 |
"""
|
|
568 |
resources = []
|
|
569 |
path = utils.resourceref.insert_begin_slash(path)
|
|
570 |
for res in self._cache.keys():
|
|
571 |
(respath,resname) = posixpath.split(res)
|
|
572 |
respath = utils.resourceref.insert_begin_slash(respath)
|
|
573 |
if recurse:
|
|
574 |
if posixpath.normpath(respath).startswith(posixpath.normpath(path)):
|
|
575 |
resources.append(res)
|
|
576 |
else:
|
|
577 |
if posixpath.normpath(respath) == posixpath.normpath(path):
|
|
578 |
resources.append(res)
|
|
579 |
return resources
|
|
580 |
|
|
581 |
def is_resource(self,path):
|
|
582 |
return self._cache.has_key(path)
|
|
583 |
|
|
584 |
def get_resource_link(self,path):
|
|
585 |
"""
|
|
586 |
Get a the actual Carbon resource link if it is found from cached storage.
|
|
587 |
"""
|
|
588 |
linkpath = self._cache.get(path, None)
|
|
589 |
if isinstance(linkpath, str):
|
|
590 |
return linkpath
|
|
591 |
else:
|
|
592 |
return None
|
|
593 |
|
|
594 |
def get_mapped_resource(self, path):
|
|
595 |
# Try to make a carbon like resource path for a confml resource
|
|
596 |
if path.startswith('featurelists'):
|
|
597 |
object_type = 'featurelist'
|
|
598 |
elif path.endswith('/root.confml'):
|
|
599 |
object_type = 'configurationlayer'
|
|
600 |
else:
|
|
601 |
object_type = 'configurationroot'
|
|
602 |
carbonpath = persistentjson.CarbonResourceMapper().map_confml_resource(object_type, path)
|
|
603 |
return carbonpath
|
|
604 |
|
|
605 |
def add_resource_link(self,link, path):
|
|
606 |
"""
|
|
607 |
Add a actual Carbon resource link. The link is the key which returns path when asked from get_resource_link.
|
|
608 |
@param link: is linking path to the actual carbon resource path
|
|
609 |
@param path: is the actual carbon path
|
|
610 |
"""
|
|
611 |
self._cache[link] = path
|
|
612 |
|
|
613 |
def get_resource_object(self,path):
|
|
614 |
"""
|
|
615 |
Get a the actual cached Carbon object if it is found.
|
|
616 |
"""
|
|
617 |
cachebj = self._cache.get(path, None)
|
|
618 |
if isinstance(cachebj, model.CarbonConfiguration):
|
|
619 |
return cachebj
|
|
620 |
return None
|
|
621 |
|