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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_XDS_STATS_WATCHER_H
#define GRPC_TEST_CPP_INTEROP_XDS_STATS_WATCHER_H
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <deque>
#include <map>
#include <mutex>
#include <set>
#include <sstream>
#include <string>
#include <thread>
#include <unordered_set>
#include <vector>
#include "absl/status/status.h"
#include "absl/types/span.h"
#include <grpcpp/grpcpp.h>
#include "src/proto/grpc/testing/empty.pb.h"
#include "src/proto/grpc/testing/messages.pb.h"
namespace grpc {
namespace testing {
class XdsStatsWatcher;
struct AsyncClientCallResult {
Empty empty_response;
SimpleResponse simple_response;
Status status;
int saved_request_id;
ClientConfigureRequest::RpcType rpc_type;
};
struct StatsWatchers {
// Unique ID for each outgoing RPC
int global_request_id = 0;
// Unique ID for each outgoing RPC by RPC method type
std::map<int, int> global_request_id_by_type;
// Stores a set of watchers that should be notified upon outgoing RPC
// completion
std::set<XdsStatsWatcher*> watchers;
// Global watcher for accumululated stats.
XdsStatsWatcher* global_watcher;
// Mutex for global_request_id and watchers
std::mutex mu;
};
/// Records the remote peer distribution for a given range of RPCs.
class XdsStatsWatcher {
public:
XdsStatsWatcher(int start_id, int end_id,
absl::Span<const std::string> metadata_keys);
// Upon the completion of an RPC, we will look at the request_id, the
// rpc_type, and the peer the RPC was sent to in order to count
// this RPC into the right stats bin.
void RpcCompleted(
const AsyncClientCallResult& call, const std::string& peer,
const std::multimap<grpc::string_ref, grpc::string_ref>& initial_metadata,
const std::multimap<grpc::string_ref, grpc::string_ref>&
trailing_metadata);
LoadBalancerStatsResponse WaitForRpcStatsResponse(int timeout_sec);
void GetCurrentRpcStats(LoadBalancerAccumulatedStatsResponse* response,
StatsWatchers* stats_watchers);
private:
int start_id_;
int end_id_;
int rpcs_needed_;
int no_remote_peer_ = 0;
std::map<int, int> no_remote_peer_by_type_;
// A map of stats keyed by peer name.
std::map<std::string, int> rpcs_by_peer_;
// A two-level map of stats keyed at top level by RPC method and second level
// by peer name.
std::map<int, std::map<std::string, int>> rpcs_by_type_;
// Storing accumulated stats in the response proto format.
LoadBalancerAccumulatedStatsResponse accumulated_stats_;
std::mutex m_;
std::condition_variable cv_;
std::unordered_set<std::string> metadata_keys_;
bool include_all_metadata_ = false;
std::map<std::string, LoadBalancerStatsResponse::MetadataByPeer>
metadata_by_peer_;
};
} // namespace testing
} // namespace grpc
#endif // GRPC_TEST_CPP_INTEROP_XDS_STATS_WATCHER_H