def newInstance(self, spool):
"""Returns a new instance.
This instance does not have any files assigned.
"""
from xbe.xbed.config.xen import InstanceConfig
from xbe.util.uuid import uuid
self.mtx.acquire()
try:
instance_name = "xbe-%s" % uuid()
icfg = InstanceConfig(instance_name)
try:
inst = Instance(icfg, spool, self)
except:
log.error(format_exception())
raise
# remember the instance in our db
self.instances[inst.uuid()] = inst
finally:
self.mtx.release()
return inst
def begin(self):
"""Begin a new transaction."""
if self.transaction:
raise RuntimeError("currently only one active transaction is supported!")
self.transaction = uuid()
f = Frame("BEGIN")
f.header["transaction"] = self.transaction
self.sendFrame(f)
def new(self, ticket_id):
"""Returns a new task."""
from xbe.util.uuid import uuid
self.mtx.acquire()
task = Task(ticket_id, uuid(), self)
self.tasks[task.id()] = task
self.mtx.release()
self.notify( (task, "newTask") )
return task
def __cache_helper(self, uri, type, **meta_info):
uid = uuid()
dst = self.__buildFileName(uid)
# the following sequence does the following:
# - use a DataStager to retrieve the uri (returns 'dst' path)
# - after that, compute a hash value for the dst (returns (path, hash) tuple)
# - transform 'dst' into a local file uri (returns (uri, hash))
# - insert into the DB
# the function returns a Deferred which fires the 'uuid' of the entry
return self.__retrieveFile(uri, dst)\
.addCallback(self.__cb_computeHash)\
.addCallback(lambda ph: ("file://"+ph[0], ph[1]))\
.addCallback(self.__cb_insertEntry, uid, type, **meta_info)\
.addCallback(lambda _: uid)\
.addErrback(self.__cb_cleanUpFileOnError, dst)
def __init__(self): StompClient.__init__(self) self.client_id = uuid()
def setUp(self):
self.testDir = os.path.join("/tmp", uuid())
def new(self):
_id = uuid.uuid()
ticket = Ticket(uuid.uuid())
self.__tickets[ticket.id()] = ticket
return ticket