LCOV - code coverage report
Current view: top level - src/metrics - metrics_actor.cpp (source / functions) Coverage Total Hit
Test: HPActor Coverage Lines: 0.0 % 22 0
Test Date: 2026-05-20 02:24:49 Functions: 0.0 % 4 0
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : // Copyright 2026 HPActor Contributors
       2                 :             : //
       3                 :             : // Licensed under the Apache License, Version 2.0 (the "License");
       4                 :             : // you may not use this file except in compliance with the License.
       5                 :             : // You may obtain a copy of the License at
       6                 :             : //
       7                 :             : //     http://www.apache.org/licenses/LICENSE-2.0
       8                 :             : //
       9                 :             : // Unless required by applicable law or agreed to in writing, software
      10                 :             : // distributed under the License is distributed on an "AS IS" BASIS,
      11                 :             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12                 :             : // See the License for the specific language governing permissions and
      13                 :             : // limitations under the License.
      14                 :             : 
      15                 :             : #include <hpactor/metrics/metrics_actor.hpp>
      16                 :             : #include <hpactor/common.pb.h>
      17                 :             : #include <cstdio>
      18                 :             : 
      19                 :             : namespace hpactor::metrics {
      20                 :             : 
      21                 :           0 : MetricsActor::MetricsActor(ActorSystem& system,
      22                 :           0 :                            std::shared_ptr<MpscRingBuffer<MetricEvent>> ring_buffer)
      23                 :             :     : EventBasedActor(nullptr, system)
      24                 :           0 :     , ring_buffer_(std::move(ring_buffer))
      25                 :           0 :     , aggregator_(registry_, system) {}
      26                 :             : 
      27                 :           0 : void MetricsActor::register_handlers() {
      28                 :           0 :     on_request<MetricsRequest, MetricsResponse>(
      29                 :           0 :         [this](const MetricsRequest& /*req*/) -> MetricsResponse {
      30                 :           0 :             aggregator_.begin_drain();
      31                 :           0 :             ring_buffer_->drain([this](const MetricEvent& e) {
      32                 :           0 :                 aggregator_.on_event(e);
      33                 :           0 :                 return true;
      34                 :             :             });
      35                 :           0 :             aggregator_.end_drain();
      36                 :             : 
      37                 :           0 :             events_lost_ += ring_buffer_->events_lost();
      38                 :             : 
      39                 :           0 :             auto snapshot = registry_.snapshot();
      40                 :           0 :             std::string body = formatter_.format(snapshot);
      41                 :             : 
      42                 :             :             char buf[256];
      43                 :           0 :             int n = snprintf(buf, sizeof(buf),
      44                 :             :                 "# HELP hpactor_metrics_events_lost_total Events lost due to ring buffer overflow.\n"
      45                 :             :                 "# TYPE hpactor_metrics_events_lost_total counter\n"
      46                 :             :                 "hpactor_metrics_events_lost_total %llu\n",
      47                 :           0 :                 static_cast<unsigned long long>(events_lost_));
      48                 :           0 :             body.append(buf, static_cast<size_t>(n));
      49                 :             : 
      50                 :           0 :             MetricsResponse resp;
      51                 :             :             resp.set_body(body);
      52                 :           0 :             return resp;
      53                 :           0 :         });
      54                 :           0 : }
      55                 :             : 
      56                 :             : } // namespace hpactor::metrics
        

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