Synnefo » ./kamaki

# Copyright 2012-2013 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

#

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

from kamaki.clients import Client, ClientError

from logging import getLogger

class AstakosClient(Client):

    """Synnefo Astakos API client"""

    def __init__(self, base_url, token=None):

        super(AstakosClient, self).__init__(base_url, token)

        self._cache = {}

        self.log = getLogger('__name__')

    def authenticate(self, token=None):

        """Get authentication information and store it in this client

        As long as the AstakosClient instance is alive, the latest

        authentication information for this token will be available

        :param token: (str) custom token to authenticate

        :returns: (dict) authentication information

        """

        self.token = token or self.token

        body = dict(auth=dict(token=dict(id=self.token)))

        self._cache[self.token] = self.post('/tokens', json=body).json

        return self._cache[self.token]

    def get_services(self, token=None):

        """

        :returns: (list) [{name:..., type:..., endpoints:[...]}, ...]

        """

        token_bu = self.token or token

        token = token or self.token

        try:

            r = self._cache[token]

        except KeyError:

            r = self.authenticate(token)

        finally:

            self.token = token_bu

        return r['access']['serviceCatalog']

    def get_service_details(self, service_type, token=None):

        """

        :param service_type: (str) compute, object-store, image, account, etc.

        :returns: (dict) {name:..., type:..., endpoints:[...]}

        :raises ClientError: (600) if service_type not in service catalog

        """

        services = self.get_services(token)

        for service in services:

            try:

                if service['type'].lower() == service_type.lower():

                    return service

            except KeyError:

                self.log.warning('Misformated service %s' % service)

        raise ClientError(

            'Service type "%s" not in service catalog' % service_type, 600)

    def get_service_endpoints(self, service_type, version=None, token=None):

        """

        :param service_type: (str) can be compute, object-store, etc.

        :param version: (str) the version id of the service

        :returns: (dict) {SNF:uiURL, adminURL, internalURL, publicURL, ...}

        :raises ClientError: (600) if service_type not in service catalog

        :raises ClientError: (601) if #matching endpoints != 1

        """

        service = self.get_service_details(service_type, token)

        matches = []

        for endpoint in service['endpoints']:

            if (not version) or (

                    endpoint['versionId'].lower() == version.lower()):

                matches.append(endpoint)

        if len(matches) != 1:

            raise ClientError(

                '%s endpoints match type %s %s' % (

                    len(matches), service_type,

                    ('and versionId %s' % version) if version else ''),

                601)

        return matches[0]

    def list_users(self):

        """list cached users information"""

        r = []

        for k, v in self._cache.items():

            r.append(dict(v['access']['user']))

            r[-1].update(dict(auth_token=k))

        return r

    def user_info(self, token=None):

        """Get (cached) user information"""

        token_bu = self.token or token

        token = token or self.token

        try:

            r = self._cache[token]

        except KeyError:

            r = self.authenticate(token)

        finally:

            self.token = token_bu

        return r['access']['user']

    def term(self, key, token=None):

        """Get (cached) term, from user credentials"""

        return self.user_term(key, token)

    def user_term(self, key, token=None):

        """Get (cached) term, from user credentials"""

        return self.user_info(token).get(key, None)