def delete_prefix(self, prefix):
"""Delete a range of keys with a prefix in etcd."""
delete_request = self._build_delete_request(
prefix, range_end=utils.prefix_range_end(utils.to_bytes(prefix)))
return self.kvstub.DeleteRange(delete_request,
self.timeout,
credentials=self.call_credentials,
metadata=self.metadata)
def watch_prefix_once(self, key_prefix, timeout=None, **kwargs):
"""
Watch a range of keys with a prefix and stop after the first event.
If the timeout was specified and event didn't arrive method
will raise ``WatchTimedOut`` exception.
"""
kwargs['range_end'] = \
utils.prefix_range_end(utils.to_bytes(key_prefix))
return self.watch_once(key_prefix, timeout=timeout, **kwargs)
def test_transaction_range_conditions(self, etcd):
etcdctl('put', '/doot/key1', 'dootdoot')
etcdctl('put', '/doot/key2', 'notdootdoot')
range_end = utils.prefix_range_end(utils.to_bytes('/doot/'))
compare = [etcd.transactions.value('/doot/', range_end) == 'dootdoot']
status, _ = etcd.transaction(compare=compare, success=[], failure=[])
assert not status
etcdctl('put', '/doot/key2', 'dootdoot')
status, _ = etcd.transaction(compare=compare, success=[], failure=[])
assert status
def watch_prefix(self, key_prefix, **kwargs):
"""
Watch a range of keys with a prefix.
:param key_prefix: prefix to watch
:returns: tuple of ``events_iterator`` and ``cancel``.
"""
kwargs['range_end'] = \
utils.prefix_range_end(utils.to_bytes(key_prefix))
return self.watch(key_prefix, **kwargs)
def get_prefix_response(self, key_prefix, **kwargs):
"""Get a range of keys with a prefix."""
if any(kwarg in kwargs for kwarg in ("key", "range_end")):
raise TypeError("Don't use key or range_end with prefix")
range_request = self._build_get_range_request(
key=key_prefix,
range_end=utils.prefix_range_end(utils.to_bytes(key_prefix)),
**kwargs)
return self.kvstub.Range(range_request,
self.timeout,
credentials=self.call_credentials,
metadata=self.metadata)
def add_watch_prefix_callback(self, key_prefix, callback, **kwargs):
"""
Watch a prefix and call a callback on every response.
If timeout was declared during the client initialization and
the watch cannot be created during that time the method raises
a ``WatchTimedOut`` exception.
:param key_prefix: prefix to watch
:param callback: callback function
:returns: watch_id. Later it could be used for cancelling watch.
"""
kwargs['range_end'] = \
utils.prefix_range_end(utils.to_bytes(key_prefix))
return self.add_watch_callback(key_prefix, callback, **kwargs)
