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//
//
// Copyright 2023 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_TEST_CPP_INTEROP_BACKEND_METRICS_LB_POLICY_H
#define GRPC_TEST_CPP_INTEROP_BACKEND_METRICS_LB_POLICY_H
#include <grpc/support/port_platform.h>
#include <grpcpp/support/channel_arguments.h>
#include "src/core/lib/config/core_configuration.h"
#include "src/proto/grpc/testing/messages.pb.h"
namespace grpc {
namespace testing {
class LoadReportTracker {
public:
// A load report, or nullopt if the call had no load report.
using LoadReportEntry = absl::optional<TestOrcaReport>;
ChannelArguments GetChannelArguments();
void ResetCollectedLoadReports();
void RecordPerRpcLoadReport(
const grpc_core::BackendMetricData* backend_metric_data);
void RecordOobLoadReport(const grpc_core::BackendMetricData& oob_metric_data);
// Returns the next per-RPC load report, or nullopt if the queue is empty.
absl::optional<LoadReportEntry> GetNextLoadReport();
LoadReportEntry WaitForOobLoadReport(
const std::function<bool(const TestOrcaReport&)>& predicate,
absl::Duration poll_timeout, size_t max_attempts);
private:
std::deque<LoadReportEntry> per_rpc_load_reports_
ABSL_GUARDED_BY(load_reports_mu_);
std::deque<TestOrcaReport> oob_load_reports_
ABSL_GUARDED_BY(load_reports_mu_);
grpc_core::Mutex load_reports_mu_;
grpc_core::CondVar load_reports_cv_ ABSL_GUARDED_BY(load_reports_mu_);
};
void RegisterBackendMetricsLbPolicy(
grpc_core::CoreConfiguration::Builder* builder);
} // namespace testing
} // namespace grpc
#endif // GRPC_TEST_CPP_INTEROP_BACKEND_METRICS_LB_POLICY_H