1: <?php
 2: /**
 3:  * Copyright 2012-2014 Rackspace US, Inc.
 4:  *
 5:  * Licensed under the Apache License, Version 2.0 (the "License");
 6:  * you may not use this file except in compliance with the License.
 7:  * You may obtain a copy of the License at
 8:  *
 9:  * http://www.apache.org/licenses/LICENSE-2.0
10:  *
11:  * Unless required by applicable law or agreed to in writing, software
12:  * distributed under the License is distributed on an "AS IS" BASIS,
13:  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14:  * See the License for the specific language governing permissions and
15:  * limitations under the License.
16:  */
17: 
18: namespace OpenCloud\LoadBalancer\Resource;
19: 
20: /**
21:  * All load balancers utilize an algorithm that defines how traffic should be
22:  * directed between back-end nodes. The default algorithm for newly created load
23:  * balancers is RANDOM, which can be overridden at creation time or changed
24:  * after the load balancer has been initially provisioned. The algorithm name is
25:  * to be constant within a major revision of the load balancing API, though new
26:  * algorithms may be created with a unique algorithm name within a given major
27:  * revision of the service API.
28:  *
29:  * Accepted options are:
30:  *
31:  * * LEAST_CONNECTIONS: The node with the lowest number of connections will
32:  *      receive requests.
33:  *
34:  * * RANDOM: Back-end servers are selected at random.
35:  *
36:  * * ROUND_ROBIN: Connections are routed to each of the back-end servers in turn.
37:  *
38:  * * WEIGHTED_LEAST_CONNECTIONS: Each request will be assigned to a node based
39:  *      on the number of concurrent connections to the node and its weight.
40:  *
41:  * * WEIGHTED_ROUND_ROBIN: A round robin algorithm, but with different
42:  *      proportions of traffic being directed to the back-end nodes. Weights
43:  *      must be defined as part of the load balancer's node configuration.
44:  */
45: class Algorithm extends ReadOnlyResource
46: {
47:     public $name;
48: 
49:     protected static $json_name = 'algorithm';
50:     protected static $url_resource = 'loadbalancers/algorithms';
51: }
52: