def get_rspec(self,
version=None,
slice_leaf=None,
projectName=None,
options={}):
version_manager = VersionManager()
version = version_manager.get_version(version)
if slice_leaf:
#Manifest RSpec will be used when somebody creates an sliver, returning the resources of this AM and the vm(s) requested by the user.
rspec_version = version_manager._get_version(
version.type, version.version, 'manifest')
options['slice'] = slice_leaf
of_xml = getManifest(options['slivers'], slice_leaf)
rspec = RSpec(version=rspec_version, user_options=options)
rspec.version.add_slivers(of_xml)
else:
rspec_version = version_manager._get_version(
version.type, version.version, 'ad')
if 'slice_urn' in options.keys():
#TODO add filter
pass
of_xml = getAdvertisement()
rspec = RSpec(version=rspec_version, user_options=options)
rspec.version.add_nodes(of_xml)
return rspec.toxml()
def get_rspec(self, version=None, slice_leaf=None, projectName=None, options={}):
version_manager = VersionManager()
version = version_manager.get_version(version)
if slice_leaf:
#Manifest RSpec will be used when somebody creates an sliver, returning the resources of this AM and the vm(s) requested by the user.
rspec_version = version_manager._get_version(version.type, version.version, 'manifest')
options['slice'] = slice_leaf
of_xml = getManifest(options['slivers'],slice_leaf)
rspec = RSpec(version=rspec_version, user_options=options)
rspec.version.add_slivers(of_xml)
else:
rspec_version = version_manager._get_version(version.type, version.version, 'ad')
if 'slice_urn' in options.keys() :
#TODO add filter
pass
of_xml = getAdvertisement()
rspec = RSpec(version=rspec_version, user_options=options)
rspec.version.add_nodes(of_xml)
return rspec.toxml()
class RSpec:
def __init__(self, rspec="", version=None, user_options={}):
self.header = '<?xml version="1.0"?>\n'
self.template = """<RSpec></RSpec>"""
self.version = None
self.xml = XML()
self.version_manager = VersionManager()
self.user_options = user_options
self.elements = {}
if rspec:
if version:
self.version = self.version_manager.get_version(version)
self.parse_xml(rspec, version)
else:
self.parse_xml(rspec)
elif version:
self.create(version)
else:
raise InvalidRSpec("No RSpec or version specified. Must specify a valid rspec string or a valid version")
def create(self, version=None):
"""
Create root element
"""
self.version = self.version_manager.get_version(version)
self.namespaces = self.version.namespaces
self.parse_xml(self.version.template, self.version)
# eg. 2011-03-23T19:53:28Z
date_format = '%Y-%m-%dT%H:%M:%SZ'
now = datetime.utcnow()
generated_ts = now.strftime(date_format)
expires_ts = (now + timedelta(hours=1)).strftime(date_format)
self.xml.set('expires', expires_ts)
self.xml.set('generated', generated_ts)
def parse_xml(self, xml, version=None):
self.xml.parse_xml(xml)
if not version:
if self.xml.schema:
self.version = self.version_manager.get_version_by_schema(self.xml.schema)
else:
#raise InvalidRSpec('unknown rspec schema: %s' % schema)
# TODO: Should start raising an exception once SFA defines a schema.
# for now we just default to sfa
self.version = self.version_manager.get_version({'type':'sfa','version': '1'})
self.version.xml = self.xml
self.namespaces = self.xml.namespaces
def load_rspec_elements(self, rspec_elements):
self.elements = {}
for rspec_element in rspec_elements:
if isinstance(rspec_element, RSpecElement):
self.elements[rspec_element.type] = rspec_element
def register_rspec_element(self, element_type, element_name, element_path):
if element_type not in RSpecElements:
raise InvalidRSpecElement(element_type, extra="no such element type: %s. Must specify a valid RSpecElement" % element_type)
self.elements[element_type] = RSpecElement(element_type, element_name, element_path)
def get_rspec_element(self, element_type):
if element_type not in self.elements:
msg = "ElementType %s not registerd for this rspec" % element_type
raise InvalidRSpecElement(element_type, extra=msg)
return self.elements[element_type]
def get(self, element_type, filter={}, depth=0):
elements = self.get_elements(element_type, filter)
elements = [self.xml.get_element_attributes(elem, depth=depth) for elem in elements]
return elements
def get_elements(self, element_type, filter={}):
"""
search for a registered element
"""
if element_type not in self.elements:
msg = "Unable to search for element %s in rspec, expath expression not found." % \
element_type
raise InvalidRSpecElement(element_type, extra=msg)
rspec_element = self.get_rspec_element(element_type)
xpath = rspec_element.path + XpathFilter.xpath(filter)
return self.xml.xpath(xpath)
def merge(self, in_rspec):
self.version.merge(in_rspec)
def filter(self, filter):
if 'component_manager_id' in filter:
nodes = self.version.get_node_elements()
for node in nodes:
if 'component_manager_id' not in node.attrib or \
node.attrib['component_manager_id'] != filter['component_manager_id']:
parent = node.getparent()
parent.remove(node)
def toxml(self, header=True):
if header:
return self.header + self.xml.toxml()
else:
return self.xml.toxml()
def save(self, filename):
return self.xml.save(filename)
class RSpec:
def __init__(self, rspec="", version=None, user_options={}):
self.header = '<?xml version="1.0"?>\n'
self.template = """<RSpec></RSpec>"""
self.version = None
self.xml = XML()
self.version_manager = VersionManager()
self.user_options = user_options
self.elements = {}
if rspec:
if version:
self.version = self.version_manager.get_version(version)
self.parse_xml(rspec, version)
else:
self.parse_xml(rspec)
elif version:
self.create(version)
else:
raise InvalidRSpec(
"No RSpec or version specified. Must specify a valid rspec string or a valid version"
)
def create(self, version=None):
"""
Create root element
"""
self.version = self.version_manager.get_version(version)
self.namespaces = self.version.namespaces
self.parse_xml(self.version.template, self.version)
# eg. 2011-03-23T19:53:28Z
date_format = '%Y-%m-%dT%H:%M:%SZ'
now = datetime.utcnow()
generated_ts = now.strftime(date_format)
expires_ts = (now + timedelta(hours=1)).strftime(date_format)
self.xml.set('expires', expires_ts)
self.xml.set('generated', generated_ts)
def parse_xml(self, xml, version=None):
self.xml.parse_xml(xml)
if not version:
if self.xml.schema:
self.version = self.version_manager.get_version_by_schema(
self.xml.schema)
else:
#raise InvalidRSpec('unknown rspec schema: %s' % schema)
# TODO: Should start raising an exception once SFA defines a schema.
# for now we just default to sfa
self.version = self.version_manager.get_version({
'type': 'sfa',
'version': '1'
})
self.version.xml = self.xml
self.namespaces = self.xml.namespaces
def load_rspec_elements(self, rspec_elements):
self.elements = {}
for rspec_element in rspec_elements:
if isinstance(rspec_element, RSpecElement):
self.elements[rspec_element.type] = rspec_element
def register_rspec_element(self, element_type, element_name, element_path):
if element_type not in RSpecElements:
raise InvalidRSpecElement(
element_type,
extra=
"no such element type: %s. Must specify a valid RSpecElement" %
element_type)
self.elements[element_type] = RSpecElement(element_type, element_name,
element_path)
def get_rspec_element(self, element_type):
if element_type not in self.elements:
msg = "ElementType %s not registerd for this rspec" % element_type
raise InvalidRSpecElement(element_type, extra=msg)
return self.elements[element_type]
def get(self, element_type, filter={}, depth=0):
elements = self.get_elements(element_type, filter)
elements = [
self.xml.get_element_attributes(elem, depth=depth)
for elem in elements
]
return elements
def get_elements(self, element_type, filter={}):
"""
search for a registered element
"""
if element_type not in self.elements:
msg = "Unable to search for element %s in rspec, expath expression not found." % \
element_type
raise InvalidRSpecElement(element_type, extra=msg)
rspec_element = self.get_rspec_element(element_type)
xpath = rspec_element.path + XpathFilter.xpath(filter)
return self.xml.xpath(xpath)
def merge(self, in_rspec):
self.version.merge(in_rspec)
def filter(self, filter):
if 'component_manager_id' in filter:
nodes = self.version.get_node_elements()
for node in nodes:
if 'component_manager_id' not in node.attrib or \
node.attrib['component_manager_id'] != filter['component_manager_id']:
parent = node.getparent()
parent.remove(node)
def toxml(self, header=True):
if header:
return self.header + self.xml.toxml()
else:
return self.xml.toxml()
def save(self, filename):
return self.xml.save(filename)