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# vi: ts=4 expandtab
import abc
import json
import six
from cloudinit import log as logging
from cloudinit.registry import DictRegistry
from cloudinit import (url_helper, util)
LOG = logging.getLogger(__name__)
@six.add_metaclass(abc.ABCMeta)
class ReportingHandler(object):
"""Base class for report handlers.
Implement :meth:`~publish_event` for controlling what
the handler does with an event.
"""
@abc.abstractmethod
def publish_event(self, event):
"""Publish an event."""
class LogHandler(ReportingHandler):
"""Publishes events to the cloud-init log at the ``DEBUG`` log level."""
def __init__(self, level="DEBUG"):
super(LogHandler, self).__init__()
if isinstance(level, int):
pass
else:
input_level = level
try:
level = getattr(logging, level.upper())
except Exception:
LOG.warn("invalid level '%s', using WARN", input_level)
level = logging.WARN
self.level = level
def publish_event(self, event):
logger = logging.getLogger(
'.'.join(['cloudinit', 'reporting', event.event_type, event.name]))
logger.log(self.level, event.as_string())
class PrintHandler(ReportingHandler):
"""Print the event as a string."""
def publish_event(self, event):
print(event.as_string())
class WebHookHandler(ReportingHandler):
def __init__(self, endpoint, consumer_key=None, token_key=None,
token_secret=None, consumer_secret=None, timeout=None,
retries=None):
super(WebHookHandler, self).__init__()
if any([consumer_key, token_key, token_secret, consumer_secret]):
self.oauth_helper = url_helper.OauthUrlHelper(
consumer_key=consumer_key, token_key=token_key,
token_secret=token_secret, consumer_secret=consumer_secret)
else:
self.oauth_helper = None
self.endpoint = endpoint
self.timeout = timeout
self.retries = retries
self.ssl_details = util.fetch_ssl_details()
def publish_event(self, event):
if self.oauth_helper:
readurl = self.oauth_helper.readurl
else:
readurl = url_helper.readurl
try:
return readurl(
self.endpoint, data=json.dumps(event.as_dict()),
timeout=self.timeout,
retries=self.retries, ssl_details=self.ssl_details)
except Exception:
LOG.warn("failed posting event: %s" % event.as_string())
available_handlers = DictRegistry()
available_handlers.register_item('log', LogHandler)
available_handlers.register_item('print', PrintHandler)
available_handlers.register_item('webhook', WebHookHandler)
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