src/core/ext/filters/client_channel/client_channel_channelz.h

   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
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  */
  18
  19 #ifndef GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_CHANNELZ_H
  20 #define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_CHANNELZ_H
  21
  22 #include <grpc/support/port_platform.h>
  23
  24 #include "src/core/lib/channel/channel_args.h"
  25 #include "src/core/lib/channel/channel_stack.h"
  26 #include "src/core/lib/channel/channel_trace.h"
  27 #include "src/core/lib/channel/channelz.h"
  28
  29 namespace grpc_core {
  30
  31 class Subchannel;
  32
  33 namespace channelz {
  34
  35 class SubchannelNode : public BaseNode {
  36  public:
  37   SubchannelNode(Subchannel* subchannel, size_t channel_tracer_max_nodes);
  38   ~SubchannelNode() override;
  39
  40   void MarkSubchannelDestroyed() {
  41     GPR_ASSERT(subchannel_ != nullptr);
  42     subchannel_ = nullptr;
  43   }
  44
  45   grpc_json* RenderJson() override;
  46
  47   // proxy methods to composed classes.
  48   void AddTraceEvent(ChannelTrace::Severity severity, const grpc_slice& data) {
  49     trace_.AddTraceEvent(severity, data);
  50   }
  51   void AddTraceEventWithReference(ChannelTrace::Severity severity,
  52                                   const grpc_slice& data,
  53                                   RefCountedPtr<BaseNode> referenced_channel) {
  54     trace_.AddTraceEventWithReference(severity, data,
  55                                       std::move(referenced_channel));
  56   }
  57   void RecordCallStarted() { call_counter_.RecordCallStarted(); }
  58   void RecordCallFailed() { call_counter_.RecordCallFailed(); }
  59   void RecordCallSucceeded() { call_counter_.RecordCallSucceeded(); }
  60
  61  private:
  62   void PopulateConnectivityState(grpc_json* json);
  63
  64   Subchannel* subchannel_;
  65   UniquePtr<char> target_;
  66   CallCountingHelper call_counter_;
  67   ChannelTrace trace_;
  68 };
  69
  70 }  // namespace channelz
  71 }  // namespace grpc_core
  72
  73 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_CHANNELZ_H */