| /* |
| * |
| * Copyright 2015 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_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_REGISTRY_H |
| #define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_REGISTRY_H |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include "src/core/ext/filters/client_channel/lb_policy_factory.h" |
| #include "src/core/lib/gprpp/memory.h" |
| #include "src/core/lib/gprpp/orphanable.h" |
| |
| namespace grpc_core { |
| |
| class LoadBalancingPolicyRegistry { |
| public: |
| /// Methods used to create and populate the LoadBalancingPolicyRegistry. |
| /// NOT THREAD SAFE -- to be used only during global gRPC |
| /// initialization and shutdown. |
| class Builder { |
| public: |
| /// Global initialization and shutdown hooks. |
| static void InitRegistry(); |
| static void ShutdownRegistry(); |
| |
| /// Registers an LB policy factory. The factory will be used to create an |
| /// LB policy whose name matches that of the factory. |
| static void RegisterLoadBalancingPolicyFactory( |
| std::unique_ptr<LoadBalancingPolicyFactory> factory); |
| }; |
| |
| /// Creates an LB policy of the type specified by \a name. |
| static OrphanablePtr<LoadBalancingPolicy> CreateLoadBalancingPolicy( |
| const char* name, LoadBalancingPolicy::Args args); |
| |
| /// Returns true if the LB policy factory specified by \a name exists in this |
| /// registry. If the load balancing policy requires a config to be specified |
| /// then sets \a requires_config to true. |
| static bool LoadBalancingPolicyExists(const char* name, |
| bool* requires_config); |
| |
| /// Returns a parsed object of the load balancing policy to be used from a |
| /// LoadBalancingConfig array \a json. |
| static RefCountedPtr<LoadBalancingPolicy::Config> ParseLoadBalancingConfig( |
| const Json& json, grpc_error_handle* error); |
| }; |
| |
| } // namespace grpc_core |
| |
| #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_REGISTRY_H */ |