GRPC C++  1.39.1
local_subchannel_pool.h
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1 /*
2  *
3  * Copyright 2018 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
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14  * See the License for the specific language governing permissions and
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18 
19 #ifndef GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LOCAL_SUBCHANNEL_POOL_H
20 #define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LOCAL_SUBCHANNEL_POOL_H
21 
23 
24 #include <map>
25 
27 
28 namespace grpc_core {
29 
30 // The local subchannel pool that is owned by a single channel. It doesn't
31 // support subchannel sharing with other channels by nature. Nor does it support
32 // subchannel retention when a subchannel is not used. The only real purpose of
33 // using this subchannel pool is to allow subchannel reuse within the channel
34 // when an incoming resolver update contains some addresses for which the
35 // channel has already created subchannels.
36 // Thread-unsafe.
38  public:
40  ~LocalSubchannelPool() override {}
41 
42  // Implements interface methods.
43  // Thread-unsafe. Intended to be invoked within the client_channel work
44  // serializer.
46  const SubchannelKey& key, RefCountedPtr<Subchannel> constructed) override;
47  void UnregisterSubchannel(const SubchannelKey& key,
48  Subchannel* subchannel) override;
50 
51  private:
52  // A map from subchannel key to subchannel.
53  std::map<SubchannelKey, Subchannel*> subchannel_map_;
54 };
55 
56 } // namespace grpc_core
57 
58 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LOCAL_SUBCHANNEL_POOL_H */
Definition: local_subchannel_pool.h:37
~LocalSubchannelPool() override
Definition: local_subchannel_pool.h:40
void UnregisterSubchannel(const SubchannelKey &key, Subchannel *subchannel) override
Definition: local_subchannel_pool.cc:38
LocalSubchannelPool()
Definition: local_subchannel_pool.h:39
RefCountedPtr< Subchannel > FindSubchannel(const SubchannelKey &key) override
Definition: local_subchannel_pool.cc:49
RefCountedPtr< Subchannel > RegisterSubchannel(const SubchannelKey &key, RefCountedPtr< Subchannel > constructed) override
Definition: local_subchannel_pool.cc:27
Definition: ref_counted_ptr.h:35
Definition: subchannel.h:148
Definition: subchannel_pool_interface.h:36
Definition: subchannel_pool_interface.h:64
Round Robin Policy.
Definition: backend_metric.cc:26
RefCountedPtr< SubchannelInterface > subchannel
Definition: ring_hash.cc:213