| // Licensed to 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. Apache Software Foundation (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 lb |
| |
| import "context" |
| |
| type LoadBalancerConfig struct { |
| appointAddr string |
| routeKey string |
| } |
| |
| type ctxKey struct{} |
| |
| var ctxKeyInstance = ctxKey{} |
| |
| func WithLoadBalanceConfig(ctx context.Context, routeKey, appointAddr string) context.Context { |
| return context.WithValue(ctx, ctxKeyInstance, &LoadBalancerConfig{ |
| routeKey: routeKey, |
| appointAddr: appointAddr, |
| }) |
| } |
| |
| func GetAddress(ctx context.Context) string { |
| if config := queryConfig(ctx); config != nil { |
| return config.appointAddr |
| } |
| return "" |
| } |
| |
| func queryConfig(ctx context.Context) *LoadBalancerConfig { |
| value := ctx.Value(ctxKeyInstance) |
| if value == nil { |
| return nil |
| } |
| return value.(*LoadBalancerConfig) |
| } |