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/*
*
* 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 */
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