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// // Copyright 2022 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_SRC_CORE_LOAD_BALANCING_OOB_BACKEND_METRIC_H #define GRPC_SRC_CORE_LOAD_BALANCING_OOB_BACKEND_METRIC_H #include <grpc/support/port_platform.h> #include <memory> #include "src/core/load_balancing/backend_metric_data.h" #include "src/core/load_balancing/subchannel_interface.h" #include "src/core/util/time.h" namespace grpc_core { // Interface for LB policies to access out-of-band backend metric data // from a subchannel. The data is reported from via an ORCA stream // established on the subchannel whenever an LB policy registers a // watcher. // // To use this, an LB policy will implement its own subclass of // OobBackendMetricWatcher, which will receive backend metric data as it // is sent by the server. It will then register that watcher with the // subchannel like this: // subchannel->AddDataWatcher( // MakeOobBackendMetricWatcher( // std::make_unique<MyOobBackendMetricWatcherSubclass>(...))); class OobBackendMetricWatcher { public: virtual ~OobBackendMetricWatcher() = default; virtual void OnBackendMetricReport( const BackendMetricData& backend_metric_data) = 0; }; std::unique_ptr<SubchannelInterface::DataWatcherInterface> MakeOobBackendMetricWatcher(Duration report_interval, std::unique_ptr<OobBackendMetricWatcher> watcher); } // namespace grpc_core #endif // GRPC_SRC_CORE_LOAD_BALANCING_OOB_BACKEND_METRIC_H
Version data entries
1 entries across 1 versions & 1 rubygems
Version | Path |
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grpc-1.68.1 | src/core/load_balancing/oob_backend_metric.h |