def save_logbook(self, book):
try:
logbooks = self._tables.logbooks
with self._engine.begin() as conn:
q = (sql.select([logbooks
]).where(logbooks.c.uuid == book.uuid))
row = conn.execute(q).first()
if row:
e_lb = self._converter.convert_book(row)
self._converter.populate_book(conn, e_lb)
e_lb.merge(book)
conn.execute(
sql.update(logbooks).where(
logbooks.c.uuid == e_lb.uuid).values(
e_lb.to_dict()))
for fd in book:
e_fd = e_lb.find(fd.uuid)
if e_fd is None:
e_lb.add(fd)
self._insert_flow_details(conn, fd, e_lb.uuid)
else:
self._update_flow_details(conn, fd, e_fd)
return e_lb
else:
conn.execute(sql.insert(logbooks, book.to_dict()))
for fd in book:
self._insert_flow_details(conn, fd, book.uuid)
return book
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure,
"Failed saving logbook '%s'" % book.uuid)
def clear_all(self):
try:
logbooks = self._tables.logbooks
with self._engine.begin() as conn:
conn.execute(logbooks.delete())
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure, "Failed clearing all entries")
def fetch(self, name, many_handler=None):
"""Fetch a named result."""
def _many_handler(values):
# By default we just return the first of many (unless provided
# a different callback that can translate many results into
# something more meaningful).
return values[0]
if many_handler is None:
many_handler = _many_handler
try:
providers = self._reverse_mapping[name]
except KeyError:
exceptions.raise_with_cause(exceptions.NotFound,
"Name %r is not mapped as a produced"
" output by any providers" % name)
values = []
for provider in providers:
if provider.name is _TRANSIENT_PROVIDER:
values.append(_item_from_single(provider,
self._transients, name))
else:
try:
container = self._get(provider.name, only_last=True)
except exceptions.NotFound:
pass
else:
values.append(_item_from_single(provider,
container, name))
if not values:
raise exceptions.NotFound("Unable to find result %r,"
" searched %s" % (name, providers))
else:
return many_handler(values)
def save_logbook(self, book):
try:
logbooks = self._tables.logbooks
with self._engine.begin() as conn:
q = (sql.select([logbooks]).
where(logbooks.c.uuid == book.uuid))
row = conn.execute(q).first()
if row:
e_lb = self._converter.convert_book(row)
self._converter.populate_book(conn, e_lb)
e_lb.merge(book)
conn.execute(sql.update(logbooks)
.where(logbooks.c.uuid == e_lb.uuid)
.values(e_lb.to_dict()))
for fd in book:
e_fd = e_lb.find(fd.uuid)
if e_fd is None:
e_lb.add(fd)
self._insert_flow_details(conn, fd, e_lb.uuid)
else:
self._update_flow_details(conn, fd, e_fd)
return e_lb
else:
conn.execute(sql.insert(logbooks, book.to_dict()))
for fd in book:
self._insert_flow_details(conn, fd, book.uuid)
return book
except sa_exc.DBAPIError:
exc.raise_with_cause(
exc.StorageFailure,
"Failed saving logbook '%s'" % book.uuid)
def _get_script(self, name):
try:
return self._scripts[name]
except KeyError:
exc.raise_with_cause(exc.NotFound,
"Can not access %s script (has this"
" board been connected?)" % name)
def clear_all(self):
try:
logbooks = self._tables.logbooks
with self._engine.begin() as conn:
conn.execute(logbooks.delete())
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure,
"Failed clearing all entries")
def validate(self):
with self._exc_wrapper():
try:
if self._conf.get('check_compatible', True):
k_utils.check_compatible(self._client, MIN_ZK_VERSION)
except exc.IncompatibleVersion:
exc.raise_with_cause(exc.StorageFailure, "Backend storage is"
" not a compatible version")
def close(self):
self._validated = False
if not self._owned:
return
try:
k_utils.finalize_client(self._client)
except (k_exc.KazooException, k_exc.ZookeeperError):
exc.raise_with_cause(exc.StorageFailure,
"Unable to finalize client")
def close(self):
self._validated = False
if not self._owned:
return
try:
k_utils.finalize_client(self._client)
except (k_exc.KazooException, k_exc.ZookeeperError):
exc.raise_with_cause(exc.StorageFailure,
"Unable to finalize client")
def validate(self):
with self._exc_wrapper():
try:
if self._conf.get('check_compatible', True):
k_utils.check_compatible(self._client, MIN_ZK_VERSION)
except exc.IncompatibleVersion:
exc.raise_with_cause(
exc.StorageFailure, "Backend storage is"
" not a compatible version")
def _storagefailure_wrapper():
try:
yield
except exc.TaskFlowException:
raise
except Exception as e:
if isinstance(e, (IOError, OSError)) and e.errno == errno.ENOENT:
exc.raise_with_cause(exc.NotFound, "Item not found: %s" % e.filename, cause=e)
else:
exc.raise_with_cause(exc.StorageFailure, "Storage backend internal error", cause=e)
def destroy_logbook(self, book_uuid):
try:
logbooks = self._tables.logbooks
with self._engine.begin() as conn:
q = logbooks.delete().where(logbooks.c.uuid == book_uuid)
r = conn.execute(q)
if r.rowcount == 0:
raise exc.NotFound("No logbook found with" " uuid '%s'" % book_uuid)
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure, "Failed destroying logbook '%s'" % book_uuid)
def _dumps(obj):
try:
return msgpackutils.dumps(obj)
except (msgpack.PackException, ValueError):
# TODO(harlowja): remove direct msgpack exception access when
# oslo.utils provides easy access to the underlying msgpack
# pack/unpack exceptions..
exc.raise_with_cause(exc.JobFailure,
"Failed to serialize object to"
" msgpack blob")
def _unclaimable_try_find_owner(cause):
try:
owner = self.find_owner(job)
except Exception:
owner = None
if owner:
message = "Job %s already claimed by '%s'" % (job.uuid, owner)
else:
message = "Job %s already claimed" % (job.uuid)
excp.raise_with_cause(excp.UnclaimableJob, message, cause=cause)
def get_atoms_for_flow(self, fd_uuid):
gathered = []
try:
with contextlib.closing(self._engine.connect()) as conn:
for ad in self._converter.atom_query_iter(conn, fd_uuid):
gathered.append(ad)
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure, "Failed getting atom details in flow" " detail '%s'" % fd_uuid)
for atom_details in gathered:
yield atom_details
def _item_from_single(provider, container, looking_for):
"""Returns item from a *single* provider."""
try:
return _item_from(container, provider.index)
except _EXTRACTION_EXCEPTIONS:
exceptions.raise_with_cause(
exceptions.NotFound,
"Unable to find result %r, expected to be able to find it"
" created by %s but was unable to perform successful"
" extraction" % (looking_for, provider))
def _loads(blob, root_types=(dict,)):
try:
return misc.decode_msgpack(blob, root_types=root_types)
except (msgpack.UnpackException, ValueError):
# TODO(harlowja): remove direct msgpack exception access when
# oslo.utils provides easy access to the underlying msgpack
# pack/unpack exceptions..
exc.raise_with_cause(exc.JobFailure,
"Failed to deserialize object from"
" msgpack blob (of length %s)" % len(blob))
def _item_from_single(provider, container, looking_for):
"""Returns item from a *single* provider."""
try:
return _item_from(container, provider.index)
except _EXTRACTION_EXCEPTIONS:
exceptions.raise_with_cause(
exceptions.NotFound,
"Unable to find result %r, expected to be able to find it"
" created by %s but was unable to perform successful"
" extraction" % (looking_for, provider))
def _get_results(looking_for, provider):
"""Gets the results saved for a given provider."""
try:
return self._get(provider.name, only_last=True)
except exceptions.NotFound:
exceptions.raise_with_cause(exceptions.NotFound,
"Expected to be able to find"
" output %r produced by %s but was"
" unable to get at that providers"
" results" % (looking_for,
provider))
def get_atom_details(self, ad_uuid):
try:
atomdetails = self._tables.atomdetails
with self._engine.begin() as conn:
q = sql.select([atomdetails]).where(atomdetails.c.uuid == ad_uuid)
row = conn.execute(q).first()
if not row:
raise exc.NotFound("No atom details found with uuid" " '%s'" % ad_uuid)
return self._converter.convert_atom_detail(row)
except sa_exc.SQLAlchemyError:
exc.raise_with_cause(exc.StorageFailure, "Failed getting atom details with" " uuid '%s'" % ad_uuid)
def _get_results(looking_for, provider):
"""Gets the results saved for a given provider."""
try:
return self._get(provider.name, 'last_results', 'failure',
_EXECUTE_STATES_WITH_RESULTS, states.EXECUTE)
except exceptions.NotFound:
exceptions.raise_with_cause(
exceptions.NotFound, "Expected to be able to find"
" output %r produced by %s but was"
" unable to get at that providers"
" results" % (looking_for, provider))
def _unclaimable_try_find_owner(cause):
try:
owner = self.find_owner(job)
except Exception:
owner = None
if owner:
message = "Job %s already claimed by '%s'" % (job.uuid, owner)
else:
message = "Job %s already claimed" % (job.uuid)
excp.raise_with_cause(excp.UnclaimableJob,
message, cause=cause)
def destroy_logbook(self, book_uuid):
try:
logbooks = self._tables.logbooks
with self._engine.begin() as conn:
q = logbooks.delete().where(logbooks.c.uuid == book_uuid)
r = conn.execute(q)
if r.rowcount == 0:
raise exc.NotFound("No logbook found with"
" uuid '%s'" % book_uuid)
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure,
"Failed destroying logbook '%s'" % book_uuid)
def get_atoms_for_flow(self, fd_uuid):
gathered = []
try:
with contextlib.closing(self._engine.connect()) as conn:
for ad in self._converter.atom_query_iter(conn, fd_uuid):
gathered.append(ad)
except sa_exc.DBAPIError:
exc.raise_with_cause(
exc.StorageFailure, "Failed getting atom details in flow"
" detail '%s'" % fd_uuid)
for atom_details in gathered:
yield atom_details
def get_flows_for_book(self, book_uuid, lazy=False):
gathered = []
try:
with contextlib.closing(self._engine.connect()) as conn:
for fd in self._converter.flow_query_iter(conn, book_uuid):
if not lazy:
self._converter.populate_flow_detail(conn, fd)
gathered.append(fd)
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure, "Failed getting flow details in" " logbook '%s'" % book_uuid)
for flow_details in gathered:
yield flow_details
def _memory_lock(self, write=False):
if write:
lock = self.backend.lock.write_lock
else:
lock = self.backend.lock.read_lock
with lock():
try:
yield
except exc.TaskFlowException:
raise
except Exception:
exc.raise_with_cause(exc.StorageFailure,
"Storage backend internal error")
def test_raise_with(self):
capture = None
try:
raise IOError('broken')
except Exception:
try:
exc.raise_with_cause(exc.TaskFlowException, 'broken')
except Exception as e:
capture = e
self.assertIsNotNone(capture)
self.assertIsInstance(capture, exc.TaskFlowException)
self.assertIsNotNone(capture.cause)
self.assertIsInstance(capture.cause, IOError)
def test_raise_with(self):
capture = None
try:
raise IOError('broken')
except Exception:
try:
exc.raise_with_cause(exc.TaskFlowException, 'broken')
except Exception as e:
capture = e
self.assertIsNotNone(capture)
self.assertIsInstance(capture, exc.TaskFlowException)
self.assertIsNotNone(capture.cause)
self.assertIsInstance(capture.cause, IOError)
def _get_results(looking_for, provider):
"""Gets the results saved for a given provider."""
try:
return self._get(provider.name, 'last_results', 'failure',
_EXECUTE_STATES_WITH_RESULTS,
states.EXECUTE)
except exceptions.NotFound:
exceptions.raise_with_cause(exceptions.NotFound,
"Expected to be able to find"
" output %r produced by %s but was"
" unable to get at that providers"
" results" % (looking_for,
provider))
def _memory_lock(self, write=False):
if write:
lock = self.backend.lock.write_lock
else:
lock = self.backend.lock.read_lock
with lock():
try:
yield
except exc.TaskFlowException:
raise
except Exception:
exc.raise_with_cause(exc.StorageFailure,
"Storage backend internal error")
def claim(self, job, who):
def _unclaimable_try_find_owner(cause):
try:
owner = self.find_owner(job)
except Exception:
owner = None
if owner:
message = "Job %s already claimed by '%s'" % (job.uuid, owner)
else:
message = "Job %s already claimed" % (job.uuid)
excp.raise_with_cause(excp.UnclaimableJob, message, cause=cause)
with self._wrap(job.uuid,
job.path,
fail_msg_tpl="Claiming failure: %s"):
# NOTE(harlowja): post as json which will allow for future changes
# more easily than a raw string/text.
value = jsonutils.dumps({
'owner': who,
})
# Ensure the target job is still existent (at the right version).
job_data, job_stat = self._client.get(job.path)
txn = self._client.transaction()
# This will abort (and not create the lock) if the job has been
# removed (somehow...) or updated by someone else to a different
# version...
txn.check(job.path, version=job_stat.version)
txn.create(job.lock_path,
value=misc.binary_encode(value),
ephemeral=True)
try:
kazoo_utils.checked_commit(txn)
except k_exceptions.NodeExistsError as e:
_unclaimable_try_find_owner(e)
except kazoo_utils.KazooTransactionException as e:
if len(e.failures) < 2:
raise
else:
if isinstance(e.failures[0], k_exceptions.NoNodeError):
excp.raise_with_cause(
excp.NotFound,
"Job %s not found to be claimed" % job.uuid,
cause=e.failures[0])
if isinstance(e.failures[1], k_exceptions.NodeExistsError):
_unclaimable_try_find_owner(e.failures[1])
else:
excp.raise_with_cause(
excp.UnclaimableJob,
"Job %s claim failed due to transaction"
" not succeeding" % (job.uuid),
cause=e)
def get_flows_for_book(self, book_uuid, lazy=False):
gathered = []
try:
with contextlib.closing(self._engine.connect()) as conn:
for fd in self._converter.flow_query_iter(conn, book_uuid):
if not lazy:
self._converter.populate_flow_detail(conn, fd)
gathered.append(fd)
except sa_exc.DBAPIError:
exc.raise_with_cause(
exc.StorageFailure, "Failed getting flow details in"
" logbook '%s'" % book_uuid)
for flow_details in gathered:
yield flow_details
def get_logbooks(self, lazy=False):
gathered = []
try:
with contextlib.closing(self._engine.connect()) as conn:
q = sql.select([self._tables.logbooks])
for row in conn.execute(q):
book = self._converter.convert_book(row)
if not lazy:
self._converter.populate_book(conn, book)
gathered.append(book)
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure, "Failed getting logbooks")
for book in gathered:
yield book
def last_failures(self):
"""The last failure dictionary that was produced.
NOTE(harlowja): This is **not** the same as the
local ``failure`` attribute as the obtained failure dictionary in
the ``results`` attribute (which is what this returns) is from
associated atom failures (which is different from the directly
related failure of the retry unit associated with this
atom detail).
"""
try:
return self.results[-1][1]
except IndexError:
exc.raise_with_cause(exc.NotFound, "Last failures not found")
def get_flow_details(self, fd_uuid, lazy=False):
try:
flowdetails = self._tables.flowdetails
with self._engine.begin() as conn:
q = sql.select([flowdetails]).where(flowdetails.c.uuid == fd_uuid)
row = conn.execute(q).first()
if not row:
raise exc.NotFound("No flow details found with uuid" " '%s'" % fd_uuid)
fd = self._converter.convert_flow_detail(row)
if not lazy:
self._converter.populate_flow_detail(conn, fd)
return fd
except sa_exc.SQLAlchemyError:
exc.raise_with_cause(exc.StorageFailure, "Failed getting flow details with" " uuid '%s'" % fd_uuid)
def _storagefailure_wrapper():
try:
yield
except exc.TaskFlowException:
raise
except Exception as e:
if isinstance(e, (IOError, OSError)) and e.errno == errno.ENOENT:
exc.raise_with_cause(exc.NotFound,
'Item not found: %s' % e.filename,
cause=e)
else:
exc.raise_with_cause(exc.StorageFailure,
"Storage backend internal error",
cause=e)
def _get_node_attr(self, path, attr_name, trans_func=None):
try:
_data, node_stat = self._client.get(path)
attr = getattr(node_stat, attr_name)
if trans_func is not None:
return trans_func(attr)
else:
return attr
except k_exceptions.NoNodeError:
excp.raise_with_cause(
excp.NotFound, "Can not fetch the %r attribute of job %s (%s),"
" path %s not found" % (attr_name, self.uuid, self.path, path))
except self._client.handler.timeout_exception:
excp.raise_with_cause(
excp.JobFailure,
"Can not fetch the %r attribute of job %s (%s),"
" operation timed out" % (attr_name, self.uuid, self.path))
except k_exceptions.SessionExpiredError:
excp.raise_with_cause(
excp.JobFailure,
"Can not fetch the %r attribute of job %s (%s),"
" session expired" % (attr_name, self.uuid, self.path))
except (AttributeError, k_exceptions.KazooException):
excp.raise_with_cause(
excp.JobFailure,
"Can not fetch the %r attribute of job %s (%s),"
" internal error" % (attr_name, self.uuid, self.path))
def last_failures(self):
"""The last failure dictionary that was produced.
NOTE(harlowja): This is **not** the same as the
local ``failure`` attribute as the obtained failure dictionary in
the ``results`` attribute (which is what this returns) is from
associated atom failures (which is different from the directly
related failure of the retry unit associated with this
atom detail).
"""
try:
return self.results[-1][1]
except IndexError:
exc.raise_with_cause(exc.NotFound, "Last failures not found")
def _wrap(self,
job_uuid,
job_path,
fail_msg_tpl="Failure: %s",
ensure_known=True):
if job_path:
fail_msg_tpl += " (%s)" % (job_path)
if ensure_known:
if not job_path:
raise ValueError("Unable to check if %r is a known path" %
(job_path))
if job_path not in self._known_jobs:
fail_msg_tpl += ", unknown job"
raise excp.NotFound(fail_msg_tpl % (job_uuid))
try:
yield
except self._client.handler.timeout_exception:
fail_msg_tpl += ", operation timed out"
excp.raise_with_cause(excp.JobFailure, fail_msg_tpl % (job_uuid))
except k_exceptions.SessionExpiredError:
fail_msg_tpl += ", session expired"
excp.raise_with_cause(excp.JobFailure, fail_msg_tpl % (job_uuid))
except k_exceptions.NoNodeError:
fail_msg_tpl += ", unknown job"
excp.raise_with_cause(excp.NotFound, fail_msg_tpl % (job_uuid))
except k_exceptions.KazooException:
fail_msg_tpl += ", internal error"
excp.raise_with_cause(excp.JobFailure, fail_msg_tpl % (job_uuid))
def _wrap(self, job_uuid, job_path,
fail_msg_tpl="Failure: %s", ensure_known=True):
if job_path:
fail_msg_tpl += " (%s)" % (job_path)
if ensure_known:
if not job_path:
raise ValueError("Unable to check if %r is a known path"
% (job_path))
if job_path not in self._known_jobs:
fail_msg_tpl += ", unknown job"
raise excp.NotFound(fail_msg_tpl % (job_uuid))
try:
yield
except self._client.handler.timeout_exception:
fail_msg_tpl += ", operation timed out"
excp.raise_with_cause(excp.JobFailure, fail_msg_tpl % (job_uuid))
except k_exceptions.SessionExpiredError:
fail_msg_tpl += ", session expired"
excp.raise_with_cause(excp.JobFailure, fail_msg_tpl % (job_uuid))
except k_exceptions.NoNodeError:
fail_msg_tpl += ", unknown job"
excp.raise_with_cause(excp.NotFound, fail_msg_tpl % (job_uuid))
except k_exceptions.KazooException:
fail_msg_tpl += ", internal error"
excp.raise_with_cause(excp.JobFailure, fail_msg_tpl % (job_uuid))
def get_logbooks(self, lazy=False):
gathered = []
try:
with contextlib.closing(self._engine.connect()) as conn:
q = sql.select([self._tables.logbooks])
for row in conn.execute(q):
book = self._converter.convert_book(row)
if not lazy:
self._converter.populate_book(conn, book)
gathered.append(book)
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure, "Failed getting logbooks")
for book in gathered:
yield book
def _get_node_attr(self, path, attr_name, trans_func=None):
try:
_data, node_stat = self._client.get(path)
attr = getattr(node_stat, attr_name)
if trans_func is not None:
return trans_func(attr)
else:
return attr
except k_exceptions.NoNodeError:
excp.raise_with_cause(
excp.NotFound,
"Can not fetch the %r attribute of job %s (%s),"
" path %s not found" % (attr_name, self.uuid,
self.path, path))
except self._client.handler.timeout_exception:
excp.raise_with_cause(
excp.JobFailure,
"Can not fetch the %r attribute of job %s (%s),"
" operation timed out" % (attr_name, self.uuid, self.path))
except k_exceptions.SessionExpiredError:
excp.raise_with_cause(
excp.JobFailure,
"Can not fetch the %r attribute of job %s (%s),"
" session expired" % (attr_name, self.uuid, self.path))
except (AttributeError, k_exceptions.KazooException):
excp.raise_with_cause(
excp.JobFailure,
"Can not fetch the %r attribute of job %s (%s),"
" internal error" % (attr_name, self.uuid, self.path))
def validate(cls, data):
try:
su.schema_validate(data, cls.SCHEMA)
except su.ValidationError as e:
cls_name = reflection.get_class_name(cls, fully_qualified=False)
excp.raise_with_cause(excp.InvalidFormat,
"%s message response data not of the"
" expected format: %s" %
(cls_name, e.message),
cause=e)
else:
state = data['state']
if state == FAILURE and 'result' in data:
ft.Failure.validate(data['result'])
def validate(cls, data):
try:
su.schema_validate(data, cls.SCHEMA)
except su.ValidationError as e:
cls_name = reflection.get_class_name(cls, fully_qualified=False)
excp.raise_with_cause(excp.InvalidFormat,
"%s message response data not of the"
" expected format: %s" % (cls_name,
e.message),
cause=e)
else:
state = data['state']
if state == FAILURE and 'result' in data:
ft.Failure.validate(data['result'])
def get_logbook(self, book_uuid, lazy=False):
try:
logbooks = self._tables.logbooks
with contextlib.closing(self._engine.connect()) as conn:
q = sql.select([logbooks]).where(logbooks.c.uuid == book_uuid)
row = conn.execute(q).first()
if not row:
raise exc.NotFound("No logbook found with" " uuid '%s'" % book_uuid)
book = self._converter.convert_book(row)
if not lazy:
self._converter.populate_book(conn, book)
return book
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure, "Failed getting logbook '%s'" % book_uuid)
def claim(self, job, who):
def _unclaimable_try_find_owner(cause):
try:
owner = self.find_owner(job)
except Exception:
owner = None
if owner:
message = "Job %s already claimed by '%s'" % (job.uuid, owner)
else:
message = "Job %s already claimed" % (job.uuid)
excp.raise_with_cause(excp.UnclaimableJob,
message, cause=cause)
with self._wrap(job.uuid, job.path,
fail_msg_tpl="Claiming failure: %s"):
# NOTE(harlowja): post as json which will allow for future changes
# more easily than a raw string/text.
value = jsonutils.dumps({
'owner': who,
})
# Ensure the target job is still existent (at the right version).
job_data, job_stat = self._client.get(job.path)
txn = self._client.transaction()
# This will abort (and not create the lock) if the job has been
# removed (somehow...) or updated by someone else to a different
# version...
txn.check(job.path, version=job_stat.version)
txn.create(job.lock_path, value=misc.binary_encode(value),
ephemeral=True)
try:
kazoo_utils.checked_commit(txn)
except k_exceptions.NodeExistsError as e:
_unclaimable_try_find_owner(e)
except kazoo_utils.KazooTransactionException as e:
if len(e.failures) < 2:
raise
else:
if isinstance(e.failures[0], k_exceptions.NoNodeError):
excp.raise_with_cause(
excp.NotFound,
"Job %s not found to be claimed" % job.uuid,
cause=e.failures[0])
if isinstance(e.failures[1], k_exceptions.NodeExistsError):
_unclaimable_try_find_owner(e.failures[1])
else:
excp.raise_with_cause(
excp.UnclaimableJob,
"Job %s claim failed due to transaction"
" not succeeding" % (job.uuid), cause=e)
def update_atom_details(self, atom_detail):
try:
atomdetails = self._tables.atomdetails
with self._engine.begin() as conn:
q = sql.select([atomdetails]).where(atomdetails.c.uuid == atom_detail.uuid)
row = conn.execute(q).first()
if not row:
raise exc.NotFound("No atom details found with uuid" " '%s'" % atom_detail.uuid)
e_ad = self._converter.convert_atom_detail(row)
self._update_atom_details(conn, atom_detail, e_ad)
return e_ad
except sa_exc.SQLAlchemyError:
exc.raise_with_cause(
exc.StorageFailure, "Failed updating atom details" " with uuid '%s'" % atom_detail.uuid
)
def get_atom_details(self, ad_uuid):
try:
atomdetails = self._tables.atomdetails
with self._engine.begin() as conn:
q = (sql.select([atomdetails
]).where(atomdetails.c.uuid == ad_uuid))
row = conn.execute(q).first()
if not row:
raise exc.NotFound("No atom details found with uuid"
" '%s'" % ad_uuid)
return self._converter.convert_atom_detail(row)
except sa_exc.SQLAlchemyError:
exc.raise_with_cause(
exc.StorageFailure, "Failed getting atom details with"
" uuid '%s'" % ad_uuid)
def save_retry_failure(self, retry_name, failed_atom_name, failure):
"""Save subflow failure to retry controller history."""
source, clone = self._atomdetail_by_name(
retry_name, expected_type=models.RetryDetail, clone=True)
try:
failures = clone.last_failures
except exceptions.NotFound:
exceptions.raise_with_cause(
exceptions.StorageFailure, "Unable to fetch most recent retry"
" failures so new retry failure can"
" be inserted")
else:
if failed_atom_name not in failures:
failures[failed_atom_name] = failure
self._with_connection(self._save_atom_detail, source, clone)
def upgrade(self):
try:
with contextlib.closing(self._engine.connect()) as conn:
# NOTE(imelnikov): Alembic does not support SQLite,
# and we don't recommend to use SQLite in production
# deployments, so migrations are rarely needed
# for SQLite. So we don't bother about working around
# SQLite limitations, and create the database directly from
# the tables when it is in use...
if "sqlite" in self._engine.url.drivername:
self._metadata.create_all(bind=conn)
else:
migration.db_sync(conn)
except sa_exc.SQLAlchemyError:
exc.raise_with_cause(exc.StorageFailure, "Failed upgrading database version")
def save_retry_failure(self, retry_name, failed_atom_name, failure):
"""Save subflow failure to retry controller history."""
source, clone = self._atomdetail_by_name(
retry_name, expected_type=models.RetryDetail, clone=True)
try:
failures = clone.last_failures
except exceptions.NotFound:
exceptions.raise_with_cause(exceptions.StorageFailure,
"Unable to fetch most recent retry"
" failures so new retry failure can"
" be inserted")
else:
if failed_atom_name not in failures:
failures[failed_atom_name] = failure
self._with_connection(self._save_atom_detail, source, clone)
def connect(self, timeout=10.0):
def try_clean():
# Attempt to do the needed cleanup if post-connection setup does
# not succeed (maybe the connection is lost right after it is
# obtained).
try:
self.close()
except k_exceptions.KazooException:
LOG.exception("Failed cleaning-up after post-connection"
" initialization failed")
try:
if timeout is not None:
timeout = float(timeout)
self._client.start(timeout=timeout)
self._closing = False
except (self._client.handler.timeout_exception,
k_exceptions.KazooException):
excp.raise_with_cause(excp.JobFailure,
"Failed to connect to zookeeper")
try:
if self._conf.get('check_compatible', True):
kazoo_utils.check_compatible(self._client, self.MIN_ZK_VERSION)
if self._worker is None and self._emit_notifications:
self._worker = futurist.ThreadPoolExecutor(max_workers=1)
self._client.ensure_path(self.path)
self._client.ensure_path(self.trash_path)
if self._job_watcher is None:
self._job_watcher = watchers.ChildrenWatch(
self._client,
self.path,
func=self._on_job_posting,
allow_session_lost=True)
self._connected = True
except excp.IncompatibleVersion:
with excutils.save_and_reraise_exception():
try_clean()
except (self._client.handler.timeout_exception,
k_exceptions.KazooException):
exc_type, exc, exc_tb = sys.exc_info()
try:
try_clean()
excp.raise_with_cause(excp.JobFailure,
"Failed to do post-connection"
" initialization", cause=exc)
finally:
del(exc_type, exc, exc_tb)
def upgrade(self):
try:
with contextlib.closing(self._engine.connect()) as conn:
# NOTE(imelnikov): Alembic does not support SQLite,
# and we don't recommend to use SQLite in production
# deployments, so migrations are rarely needed
# for SQLite. So we don't bother about working around
# SQLite limitations, and create the database directly from
# the tables when it is in use...
if 'sqlite' in self._engine.url.drivername:
self._metadata.create_all(bind=conn)
else:
migration.db_sync(conn)
except sa_exc.SQLAlchemyError:
exc.raise_with_cause(exc.StorageFailure,
"Failed upgrading database version")
def get_revert_result(self, atom_name):
"""Gets the ``revert`` results for an atom from storage."""
try:
results = self._get(atom_name, 'revert_results', 'revert_failure',
_REVERT_STATES_WITH_RESULTS, states.REVERT)
except exceptions.DisallowedAccess as e:
if e.state == states.IGNORE:
exceptions.raise_with_cause(
exceptions.NotFound, "Result for atom '%s' revert is"
" not known (as it was"
" ignored)" % atom_name)
else:
exceptions.raise_with_cause(
exceptions.NotFound, "Result for atom '%s' revert is"
" not known" % atom_name)
else:
return results
def get_logbook(self, book_uuid, lazy=False):
try:
logbooks = self._tables.logbooks
with contextlib.closing(self._engine.connect()) as conn:
q = (sql.select([logbooks
]).where(logbooks.c.uuid == book_uuid))
row = conn.execute(q).first()
if not row:
raise exc.NotFound("No logbook found with"
" uuid '%s'" % book_uuid)
book = self._converter.convert_book(row)
if not lazy:
self._converter.populate_book(conn, book)
return book
except sa_exc.DBAPIError:
exc.raise_with_cause(exc.StorageFailure,
"Failed getting logbook '%s'" % book_uuid)
def _atomdetail_by_name(self, atom_name, expected_type=None, clone=False):
try:
ad = self._flowdetail.find(self._atom_name_to_uuid[atom_name])
except KeyError:
exceptions.raise_with_cause(exceptions.NotFound,
"Unknown atom name: %s" % atom_name)
else:
# TODO(harlowja): we need to figure out how to get away from doing
# these kinds of type checks in general (since they likely mean
# we aren't doing something right).
if expected_type and not isinstance(ad, expected_type):
raise TypeError(
"Atom %s is not of the expected type: %s" %
(atom_name, reflection.get_class_name(expected_type)))
if clone:
return (ad, ad.copy())
else:
return (ad, ad)
def get_flow_details(self, fd_uuid, lazy=False):
try:
flowdetails = self._tables.flowdetails
with self._engine.begin() as conn:
q = (sql.select([flowdetails
]).where(flowdetails.c.uuid == fd_uuid))
row = conn.execute(q).first()
if not row:
raise exc.NotFound("No flow details found with uuid"
" '%s'" % fd_uuid)
fd = self._converter.convert_flow_detail(row)
if not lazy:
self._converter.populate_flow_detail(conn, fd)
return fd
except sa_exc.SQLAlchemyError:
exc.raise_with_cause(
exc.StorageFailure, "Failed getting flow details with"
" uuid '%s'" % fd_uuid)
