| /* |
| * 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. |
| */ |
| |
| /* |
| * |
| * Copyright 2021 gRPC authors. |
| * |
| */ |
| |
| package ringhash |
| |
| import ( |
| "context" |
| ) |
| |
| type clusterKey struct{} |
| |
| func getRequestHash(ctx context.Context) uint64 { |
| requestHash, _ := ctx.Value(clusterKey{}).(uint64) |
| return requestHash |
| } |
| |
| // GetRequestHashForTesting returns the request hash in the context; to be used |
| // for testing only. |
| func GetRequestHashForTesting(ctx context.Context) uint64 { |
| return getRequestHash(ctx) |
| } |
| |
| // SetRequestHash adds the request hash to the context for use in Ring Hash Load |
| // Balancing. |
| func SetRequestHash(ctx context.Context, requestHash uint64) context.Context { |
| return context.WithValue(ctx, clusterKey{}, requestHash) |
| } |