yang-g | 4287998 | 2016-10-13 15:58:31 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
David Garcia Quintas | f31f096 | 2017-02-10 14:53:58 -0800 | [diff] [blame] | 3 | * Copyright 2017, Google Inc. |
yang-g | 4287998 | 2016-10-13 15:58:31 -0700 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
David Garcia Quintas | f31f096 | 2017-02-10 14:53:58 -0800 | [diff] [blame] | 34 | #ifndef GRPC_LOAD_REPORTING_H |
| 35 | #define GRPC_LOAD_REPORTING_H |
yang-g | 4287998 | 2016-10-13 15:58:31 -0700 | [diff] [blame] | 36 | |
David Garcia Quintas | f31f096 | 2017-02-10 14:53:58 -0800 | [diff] [blame] | 37 | #include <grpc/impl/codegen/port_platform.h> |
yang-g | 4287998 | 2016-10-13 15:58:31 -0700 | [diff] [blame] | 38 | |
David Garcia Quintas | f31f096 | 2017-02-10 14:53:58 -0800 | [diff] [blame] | 39 | #ifdef __cplusplus |
| 40 | extern "C" { |
| 41 | #endif |
| 42 | |
| 43 | /** Metadata key for the gRPC LB load balancer token. |
| 44 | * |
| 45 | * The value corresponding to this key is an opaque token that is given to the |
| 46 | * frontend as part of each pick; the frontend sends this token to the backend |
| 47 | * in each request it sends when using that pick. The token is used by the |
| 48 | * backend to verify the request and to allow the backend to report load to the |
| 49 | * gRPC LB system. */ |
| 50 | #define GRPC_LB_TOKEN_MD_KEY "lb-token" |
| 51 | |
David Garcia Quintas | a818f72 | 2017-04-14 16:01:14 -0700 | [diff] [blame] | 52 | /** Metadata key for gRPC LB cost reporting. |
| 53 | * |
| 54 | * The value corresponding to this key is an opaque binary blob reported by the |
| 55 | * backend as part of its trailing metadata containing cost information for the |
| 56 | * call. */ |
| 57 | #define GRPC_LB_COST_MD_KEY "lb-cost-bin" |
David Garcia Quintas | f31f096 | 2017-02-10 14:53:58 -0800 | [diff] [blame] | 58 | |
| 59 | #ifdef __cplusplus |
yang-g | 4287998 | 2016-10-13 15:58:31 -0700 | [diff] [blame] | 60 | } |
David Garcia Quintas | f31f096 | 2017-02-10 14:53:58 -0800 | [diff] [blame] | 61 | #endif |
yang-g | 4287998 | 2016-10-13 15:58:31 -0700 | [diff] [blame] | 62 | |
David Garcia Quintas | f31f096 | 2017-02-10 14:53:58 -0800 | [diff] [blame] | 63 | #endif /* GRPC_LOAD_REPORTING_H */ |