1 // 2 // Copyright 2018 gRPC authors. 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #ifndef GRPC_SRC_CORE_LOAD_BALANCING_RING_HASH_RING_HASH_H 18 #define GRPC_SRC_CORE_LOAD_BALANCING_RING_HASH_RING_HASH_H 19 20 #include <grpc/support/port_platform.h> 21 22 #include <stdint.h> 23 24 #include "src/core/lib/gprpp/unique_type_name.h" 25 #include "src/core/lib/gprpp/validation_errors.h" 26 #include "src/core/lib/json/json.h" 27 #include "src/core/lib/json/json_args.h" 28 #include "src/core/lib/json/json_object_loader.h" 29 #include "src/core/service_config/service_config_call_data.h" 30 31 namespace grpc_core { 32 33 class RequestHashAttribute final 34 : public ServiceConfigCallData::CallAttributeInterface { 35 public: 36 static UniqueTypeName TypeName(); 37 RequestHashAttribute(uint64_t request_hash)38 explicit RequestHashAttribute(uint64_t request_hash) 39 : request_hash_(request_hash) {} 40 request_hash()41 uint64_t request_hash() const { return request_hash_; } 42 43 private: type()44 UniqueTypeName type() const override { return TypeName(); } 45 46 uint64_t request_hash_; 47 }; 48 49 // Helper Parsing method to parse ring hash policy configs; for example, ring 50 // hash size validity. 51 struct RingHashConfig { 52 uint64_t min_ring_size = 1024; 53 uint64_t max_ring_size = 4096; 54 55 static const JsonLoaderInterface* JsonLoader(const JsonArgs&); 56 void JsonPostLoad(const Json& json, const JsonArgs&, 57 ValidationErrors* errors); 58 }; 59 60 } // namespace grpc_core 61 62 #endif // GRPC_SRC_CORE_LOAD_BALANCING_RING_HASH_RING_HASH_H 63