| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package model |
| |
| // LbPolicyType the load balance policy enum |
| type LbPolicyType string |
| |
| const ( |
| LoadBalancerRand LbPolicyType = "Rand" |
| LoadBalancerRoundRobin LbPolicyType = "RoundRobin" |
| LoadBalancerRingHashing LbPolicyType = "RingHashing" |
| LoadBalancerMaglevHashing LbPolicyType = "MaglevHashing" |
| ) |
| |
| var LbPolicyTypeValue = map[string]LbPolicyType{ |
| "Rand": LoadBalancerRand, |
| "RoundRobin": LoadBalancerRoundRobin, |
| "RingHashing": LoadBalancerRingHashing, |
| "MaglevHashing": LoadBalancerMaglevHashing, |
| } |
| |
| type LbPolicy interface { |
| GenerateHash() string |
| } |
| |
| // LbConsistentHash supports consistent hash load balancing |
| type LbConsistentHash interface { |
| Hash(key string) uint32 |
| Add(host string) |
| Get(key string) (string, error) |
| GetHash(key uint32) (string, error) |
| Remove(host string) bool |
| } |
| |
| type ConsistentHashInitFunc = func(ConsistentHash, []*Endpoint) LbConsistentHash |
| |
| // ConsistentHashInitMap stores the Init functions for consistent hash load balancing |
| var ConsistentHashInitMap = map[LbPolicyType]ConsistentHashInitFunc{} |