def consume_in_thread(self):
"""Runs the ZmqProxy service"""
ipc_dir = CONF.rpc_zmq_ipc_dir
consume_in = "tcp://%s:%s" % \
(CONF.rpc_zmq_bind_address,
CONF.rpc_zmq_port)
consumption_proxy = InternalContext(None)
if not os.path.isdir(ipc_dir):
try:
utils.execute('mkdir', '-p', ipc_dir, run_as_root=True)
utils.execute('chown', "%s:%s" % (os.getuid(), os.getgid()),
ipc_dir, run_as_root=True)
utils.execute('chmod', '750', ipc_dir, run_as_root=True)
except utils.ProcessExecutionError:
with excutils.save_and_reraise_exception():
LOG.error(_("Could not create IPC directory %s") %
(ipc_dir, ))
try:
self.register(consumption_proxy,
consume_in,
zmq.PULL,
out_bind=True)
except zmq.ZMQError:
with excutils.save_and_reraise_exception():
LOG.error(_("Could not create ZeroMQ receiver daemon. "
"Socket may already be in use."))
super(ZmqProxy, self).consume_in_thread()
def consume_in_thread(self):
"""Runs the ZmqProxy service"""
ipc_dir = CONF.rpc_zmq_ipc_dir
consume_in = "tcp://%s:%s" % \
(CONF.rpc_zmq_bind_address,
CONF.rpc_zmq_port)
consumption_proxy = InternalContext(None)
if not os.path.isdir(ipc_dir):
try:
utils.execute('mkdir', '-p', ipc_dir, run_as_root=True)
utils.execute('chown',
"%s:%s" % (os.getuid(), os.getgid()),
ipc_dir,
run_as_root=True)
utils.execute('chmod', '750', ipc_dir, run_as_root=True)
except utils.ProcessExecutionError:
with excutils.save_and_reraise_exception():
LOG.error(
_("Could not create IPC directory %s") % (ipc_dir, ))
try:
self.register(consumption_proxy,
consume_in,
zmq.PULL,
out_bind=True)
except zmq.ZMQError:
with excutils.save_and_reraise_exception():
LOG.error(
_("Could not create ZeroMQ receiver daemon. "
"Socket may already be in use."))
super(ZmqProxy, self).consume_in_thread()
def remove_path_on_error(path):
"""Protect code that wants to operate on PATH atomically.
Any exception will cause PATH to be removed.
"""
try:
yield
except Exception:
with excutils.save_and_reraise_exception():
delete_if_exists(path)
def remove_path_on_error(path):
"""Protect code that wants to operate on PATH atomically.
Any exception will cause PATH to be removed.
"""
try:
yield
except Exception:
with excutils.save_and_reraise_exception():
delete_if_exists(path)
def logging_error(message):
"""Catches exception, write message to the log, re-raise.
This is a common refinement of save_and_reraise that writes a specific
message to the log.
"""
try:
yield
except Exception as error:
with excutils.save_and_reraise_exception():
LOG.exception(message)
def logging_error(message):
"""Catches exception, write message to the log, re-raise.
This is a common refinement of save_and_reraise that writes a specific
message to the log.
"""
try:
yield
except Exception as error:
with excutils.save_and_reraise_exception():
LOG.exception(message)
def rollback_and_reraise(self, msg=None, **kwargs):
"""Rollback a series of actions then re-raise the exception.
.. note:: (sirp) This should only be called within an
exception handler.
"""
with excutils.save_and_reraise_exception():
if msg:
LOG.exception(msg, **kwargs)
self._rollback()
def _serialize(data):
"""
Serialization wrapper
We prefer using JSON, but it cannot encode all types.
Error if a developer passes us bad data.
"""
try:
return jsonutils.dumps(data, ensure_ascii=True)
except TypeError:
with excutils.save_and_reraise_exception():
LOG.error(_("JSON serialization failed."))
def _serialize(data):
"""
Serialization wrapper
We prefer using JSON, but it cannot encode all types.
Error if a developer passes us bad data.
"""
try:
return jsonutils.dumps(data, ensure_ascii=True)
except TypeError:
with excutils.save_and_reraise_exception():
LOG.error(_("JSON serialization failed."))
def rollback_and_reraise(self, msg=None, **kwargs):
"""Rollback a series of actions then re-raise the exception.
.. note:: (sirp) This should only be called within an
exception handler.
"""
with excutils.save_and_reraise_exception():
if msg:
LOG.exception(msg, **kwargs)
self._rollback()
def __iter__(self):
"""Return a result until we get a 'None' response from consumer"""
if self._done:
raise StopIteration
while True:
try:
self._iterator.next()
except Exception:
with excutils.save_and_reraise_exception():
self.done()
if self._got_ending:
self.done()
raise StopIteration
result = self._result
if isinstance(result, Exception):
self.done()
raise result
yield result
def __iter__(self):
"""Return a result until we get a reply with an 'ending" flag"""
if self._done:
raise StopIteration
while True:
try:
data = self._dataqueue.get(timeout=self._timeout)
result = self._process_data(data)
except queue.Empty:
LOG.exception(_('Timed out waiting for RPC response.'))
self.done()
raise rpc_common.Timeout()
except Exception:
with excutils.save_and_reraise_exception():
self.done()
if self._got_ending:
self.done()
raise StopIteration
if isinstance(result, Exception):
self.done()
raise result
yield result
