| /* |
| * |
| * Copyright 2018 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_LOCAL_SUBCHANNEL_POOL_H |
| #define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LOCAL_SUBCHANNEL_POOL_H |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include <map> |
| |
| #include "src/core/ext/filters/client_channel/subchannel_pool_interface.h" |
| |
| namespace grpc_core { |
| |
| // The local subchannel pool that is owned by a single channel. It doesn't |
| // support subchannel sharing with other channels by nature. Nor does it support |
| // subchannel retention when a subchannel is not used. The only real purpose of |
| // using this subchannel pool is to allow subchannel reuse within the channel |
| // when an incoming resolver update contains some addresses for which the |
| // channel has already created subchannels. |
| // Thread-unsafe. |
| class LocalSubchannelPool final : public SubchannelPoolInterface { |
| public: |
| LocalSubchannelPool() {} |
| ~LocalSubchannelPool() override {} |
| |
| // Implements interface methods. |
| // Thread-unsafe. Intended to be invoked within the client_channel work |
| // serializer. |
| RefCountedPtr<Subchannel> RegisterSubchannel( |
| const SubchannelKey& key, RefCountedPtr<Subchannel> constructed) override; |
| void UnregisterSubchannel(const SubchannelKey& key, |
| Subchannel* subchannel) override; |
| RefCountedPtr<Subchannel> FindSubchannel(const SubchannelKey& key) override; |
| |
| private: |
| // A map from subchannel key to subchannel. |
| std::map<SubchannelKey, Subchannel*> subchannel_map_; |
| }; |
| |
| } // namespace grpc_core |
| |
| #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LOCAL_SUBCHANNEL_POOL_H */ |