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# Copyright (C) 2014 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import yaml
class FirehoseConfigError(Exception):
def __init__(self, config, what, path):
self.config = config
self.what = what
self.path = path
def __repr__(self):
return "<FirehoseConfigError %s: %s (@ %s)>" % (
self.config.sourcename, self.what, (".").join(self.path))
def __str__(self):
return repr(self)
class FirehoseConfig:
def __init__(self, sourcename, readfrom):
self.sourcename = sourcename
self.content = yaml.safe_load(readfrom)
assert(self.content.get("kind") == "firehose")
def __getattr__(self, attrname):
attrpath = attrname.split("_")
node = self.content
pathused = []
while attrpath:
elem = attrpath.pop(0)
pathused.append(elem)
if node.get(elem) is None:
raise FirehoseConfigError(self, "Unknown element", pathused)
else:
node = node.get(elem)
return node
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