1 // 2 // Copyright 2015 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_LIB_LOAD_BALANCING_LB_POLICY_FACTORY_H 18 #define GRPC_SRC_CORE_LIB_LOAD_BALANCING_LB_POLICY_FACTORY_H 19 20 #include <grpc/support/port_platform.h> 21 22 #include "absl/status/statusor.h" 23 #include "absl/strings/string_view.h" 24 25 #include "src/core/lib/gprpp/orphanable.h" 26 #include "src/core/lib/gprpp/ref_counted_ptr.h" 27 #include "src/core/lib/json/json.h" 28 #include "src/core/lib/load_balancing/lb_policy.h" 29 30 namespace grpc_core { 31 32 class LoadBalancingPolicyFactory { 33 public: ~LoadBalancingPolicyFactory()34 virtual ~LoadBalancingPolicyFactory() {} 35 36 /// Returns a new LB policy instance. 37 virtual OrphanablePtr<LoadBalancingPolicy> CreateLoadBalancingPolicy( 38 LoadBalancingPolicy::Args) const = 0; 39 40 /// Returns the LB policy name that this factory provides. 41 virtual absl::string_view name() const = 0; 42 43 virtual absl::StatusOr<RefCountedPtr<LoadBalancingPolicy::Config>> 44 ParseLoadBalancingConfig(const Json& json) const = 0; 45 }; 46 47 } // namespace grpc_core 48 49 #endif // GRPC_SRC_CORE_LIB_LOAD_BALANCING_LB_POLICY_FACTORY_H 50