1# Licensed to the Apache Software Foundation (ASF) under one or more
2# contributor license agreements.  See the NOTICE file distributed with
3# this work for additional information regarding copyright ownership.
4# The ASF licenses this file to You under the Apache License, Version 2.0
5# (the "License"); you may not use this file except in compliance with
6# the License.  You may obtain a copy of the License at
7#
8#     http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15
16from typing import Dict
17
18from libcloud.backup.providers import Provider as BackupProvider
19from libcloud.backup.providers import get_driver as get_backup_driver
20
21from libcloud.compute.providers import Provider as ComputeProvider
22from libcloud.compute.providers import get_driver as get_compute_driver
23
24from libcloud.container.providers import Provider as ContainerProvider
25from libcloud.container.providers import get_driver as get_container_driver
26
27from libcloud.dns.providers import Provider as DnsProvider
28from libcloud.dns.providers import get_driver as get_dns_driver
29
30from libcloud.loadbalancer.providers import Provider as LoadBalancerProvider
31from libcloud.loadbalancer.providers import get_driver as \
32    get_loadbalancer_driver
33
34from libcloud.storage.providers import Provider as StorageProvider
35from libcloud.storage.providers import get_driver as get_storage_driver
36
37
38class DriverType(object):
39    """ Backup-as-a-service driver """
40    BACKUP = BackupProvider
41
42    """ Compute-as-a-Service driver """
43    COMPUTE = ComputeProvider
44
45    """ Container-as-a-Service driver """
46    CONTAINER = ContainerProvider
47
48    """ DNS service provider driver """
49    DNS = DnsProvider
50
51    """ Load balancer provider-driver """
52    LOADBALANCER = LoadBalancerProvider
53
54    """ Storage-as-a-Service driver """
55    STORAGE = StorageProvider
56
57
58DriverTypeFactoryMap = {
59    DriverType.BACKUP: get_backup_driver,
60    DriverType.COMPUTE: get_compute_driver,
61    DriverType.CONTAINER: get_container_driver,
62    DriverType.DNS: get_dns_driver,
63    DriverType.LOADBALANCER: get_loadbalancer_driver,
64    DriverType.STORAGE: get_storage_driver
65}  # type: Dict
66
67
68class DriverTypeNotFoundError(KeyError):
69    def __init__(self, type):
70        self.message = "Driver type '%s' not found." % type
71
72    def __repr__(self):
73        return self.message
74
75
76def get_driver(type, provider):
77    """
78    Get a driver
79    """
80    try:
81        return DriverTypeFactoryMap[type](provider)
82    except KeyError:
83        raise DriverTypeNotFoundError(type)
84