| /* |
| * |
| * Copyright 2017 gRPC authors. |
| * |
| * Licensed 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. |
| * |
| */ |
| |
| #ifndef GRPC_LOAD_REPORTING_H |
| #define GRPC_LOAD_REPORTING_H |
| |
| #include <grpc/impl/codegen/port_platform.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** Metadata key for the gRPC LB load balancer token. |
| * |
| * The value corresponding to this key is an opaque token that is given to the |
| * frontend as part of each pick; the frontend sends this token to the backend |
| * in each request it sends when using that pick. The token is used by the |
| * backend to verify the request and to allow the backend to report load to the |
| * gRPC LB system. */ |
| #define GRPC_LB_TOKEN_MD_KEY "lb-token" |
| |
| /** Metadata key for gRPC LB cost reporting. |
| * |
| * The value corresponding to this key is an opaque binary blob reported by the |
| * backend as part of its trailing metadata containing cost information for the |
| * call. */ |
| #define GRPC_LB_COST_MD_KEY "lb-cost-bin" |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* GRPC_LOAD_REPORTING_H */ |