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instancestatus.py
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instancestatus.py
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# Copyright (c) 2012 Mitch Garnaat http://garnaat.org/
# Copyright (c) 2012 Amazon.com, Inc. or its affiliates.
# All Rights Reserved
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
class Details(dict):
"""
A dict object that contains name/value pairs which provide
more detailed information about the status of the system
or the instance.
"""
def startElement(self, name, attrs, connection):
return None
def endElement(self, name, value, connection):
if name == 'name':
self._name = value
elif name == 'status':
self[self._name] = value
else:
setattr(self, name, value)
class Event(object):
"""
A status event for an instance.
:ivar code: A string indicating the event type.
:ivar description: A string describing the reason for the event.
:ivar not_before: A datestring describing the earliest time for
the event.
:ivar not_after: A datestring describing the latest time for
the event.
"""
def __init__(self, code=None, description=None,
not_before=None, not_after=None):
self.code = code
self.description = description
self.not_before = not_before
self.not_after = not_after
def __repr__(self):
return 'Event:%s' % self.code
def startElement(self, name, attrs, connection):
return None
def endElement(self, name, value, connection):
if name == 'code':
self.code = value
elif name == 'description':
self.description = value
elif name == 'notBefore':
self.not_before = value
elif name == 'notAfter':
self.not_after = value
else:
setattr(self, name, value)
class Status(object):
"""
A generic Status object used for system status and instance status.
:ivar status: A string indicating overall status.
:ivar details: A dict containing name-value pairs which provide
more details about the current status.
"""
def __init__(self, status=None, details=None):
self.status = status
if not details:
details = Details()
self.details = details
def __repr__(self):
return 'Status:%s' % self.status
def startElement(self, name, attrs, connection):
if name == 'details':
return self.details
return None
def endElement(self, name, value, connection):
if name == 'status':
self.status = value
else:
setattr(self, name, value)
class EventSet(list):
def startElement(self, name, attrs, connection):
if name == 'item':
event = Event()
self.append(event)
return event
else:
return None
def endElement(self, name, value, connection):
setattr(self, name, value)
class InstanceStatus(object):
"""
Represents an EC2 Instance status as reported by
DescribeInstanceStatus request.
:ivar id: The instance identifier.
:ivar zone: The availability zone of the instance.
:ivar events: A list of events relevant to the instance.
:ivar state_code: An integer representing the current state
of the instance.
:ivar state_name: A string describing the current state
of the instance.
:ivar system_status: A Status object that reports impaired
functionality that stems from issues related to the systems
that support an instance, such as such as hardware failures
and network connectivity problems.
:ivar instance_status: A Status object that reports impaired
functionality that arises from problems internal to the instance.
"""
def __init__(self, id=None, zone=None, events=None,
state_code=None, state_name=None):
self.id = id
self.zone = zone
self.events = events
self.state_code = state_code
self.state_name = state_name
self.system_status = Status()
self.instance_status = Status()
def __repr__(self):
return 'InstanceStatus:%s' % self.id
def startElement(self, name, attrs, connection):
if name == 'eventsSet':
self.events = EventSet()
return self.events
elif name == 'systemStatus':
return self.system_status
elif name == 'instanceStatus':
return self.instance_status
else:
return None
def endElement(self, name, value, connection):
if name == 'instanceId':
self.id = value
elif name == 'availabilityZone':
self.zone = value
elif name == 'code':
self.state_code = int(value)
elif name == 'name':
self.state_name = value
else:
setattr(self, name, value)
class InstanceStatusSet(list):
"""
A list object that contains the results of a call to
DescribeInstanceStatus request. Each element of the
list will be an InstanceStatus object.
:ivar next_token: If the response was truncated by
the EC2 service, the next_token attribute of the
object will contain the string that needs to be
passed in to the next request to retrieve the next
set of results.
"""
def __init__(self, connection=None):
list.__init__(self)
self.connection = connection
self.next_token = None
def startElement(self, name, attrs, connection):
if name == 'item':
status = InstanceStatus()
self.append(status)
return status
else:
return None
def endElement(self, name, value, connection):
if name == 'nextToken':
self.next_token = value
setattr(self, name, value)