[BE] feat#331 부하테스트 위한 커스텀 메트릭 측정 기능 구현

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➕ 이슈 번호

• [BE] 부하테스트 위한 커스텀 메트릭 측정 기능 구현 #331

🔎 작업 내용

• /api/metric/start로 post 요청 보내면 메트릭 측정 시작

• /api/metric/stop으로 post 요청 보내면 메트릭 측정 멈추고, 결과 반환

• 메트릭 측정하고자 하는 지표 (아래 테스트한 예시)

  ksnghyk@KSNGHYK-book  ~  http post http://localhost:3000/api/metric/stop
  {
      "application": {
          "request": {
              "eventStats": {
                  "chatMessage": {
                      "count": 100,
                      "max": 21.705625,
                      "mean": 2.0312216700000003,
                      "min": 0.452792,
                      "p50": 0.866042,
                      "p80": 2.338042,
                      "p90": 3.867042,
                      "p95": 7.000625,
                      "p99": 14.118209
                  },
                  "setPlayerName": {
                      "count": 50,
                      "max": 20.375792,
                      "mean": 1.7612491800000003,
                      "min": 0.371333,
                      "p50": 0.734125,
                      "p80": 1.332084,
                      "p90": 1.560917,
                      "p95": 14.288541,
                      "p99": 20.375792
                  },
                  "updatePosition": {
                      "count": 250,
                      "max": 71.892458,
                      "mean": 4.023490696000001,
                      "min": 0.308792,
                      "p50": 0.873584,
                      "p80": 3.020917,
                      "p90": 11.494542,
                      "p95": 19.663084,
                      "p99": 54.764625
                  }
              },
              "summary": {
                  "averageExecutionTime": 3.242643250000001,
                  "maxExecutionTime": 71.892458,
                  "minExecutionTime": 0.308792,
                  "p50": 0.863708,
                  "p80": 2.232416,
                  "p90": 9.164791,
                  "p95": 14.288541,
                  "p99": 46.193875,
                  "totalEvents": 400
              }
          },
          "response": {
              "eventStats": {
                  "Chat": {
                      "count": 100,
                      "max": 9.040166,
                      "mean": 2.3098683399999995,
                      "min": 1.008583,
                      "p50": 1.729583,
                      "p80": 3.097625,
                      "p90": 4.070959,
                      "p95": 5.182166,
                      "p99": 7.31275
                  },
                  "Disconnect": {
                      "count": 50,
                      "max": 6.112792,
                      "mean": 1.5421792599999997,
                      "min": 0.436416,
                      "p50": 1.093375,
                      "p80": 2.219333,
                      "p90": 2.721916,
                      "p95": 3.649041,
                      "p99": 6.112792
                  },
                  "Join": {
                      "count": 50,
                      "max": 9.279541,
                      "mean": 2.41773002,
                      "min": 0.91625,
                      "p50": 1.874083,
                      "p80": 2.893208,
                      "p90": 3.312875,
                      "p95": 6.660917,
                      "p99": 9.279541
                  },
                  "Name": {
                      "count": 50,
                      "max": 8.731458,
                      "mean": 1.8585383000000002,
                      "min": 0.605458,
                      "p50": 1.485833,
                      "p80": 2.466541,
                      "p90": 3.061459,
                      "p95": 3.837209,
                      "p99": 8.731458
                  },
                  "Position": {
                      "count": 250,
                      "max": 51.931334,
                      "mean": 5.740406056000001,
                      "min": 0.949875,
                      "p50": 2.420541,
                      "p80": 5.808792,
                      "p90": 21.592917,
                      "p95": 22.88725,
                      "p99": 51.930959
                  }
              },
              "summary": {
                  "averageExecutionTime": 3.9140214540000002,
                  "maxExecutionTime": 51.931334,
                  "minExecutionTime": 0.436416,
                  "p50": 1.911083,
                  "p80": 3.761667,
                  "p90": 7.31275,
                  "p95": 21.592917,
                  "p99": 27.725292,
                  "totalEvents": 500
              }
          }
      },
      "success": true,
      "system": {
          "duration": {
              "end": "2024. 12. 22. 오후 7:42:28",
              "seconds": "22.992s",
              "start": "2024. 12. 22. 오후 7:42:05"
          }
      },
      "throughput": {
          "request": {
              "avgThroughput": 29.39,
              "durationSeconds": 13.61,
              "peakThroughput": 117
          },
          "response": {
              "avgThroughput": 35.44,
              "durationSeconds": 14.11,
              "peakThroughput": 116
          }
      }
  }

🎯 리뷰 요구사항 (선택)

• 특별히 봐줬으면 하는 부분이 있다면 적어주세요

✅ Check List

• merge할 브랜치의 위치를 확인했나요?
• Label을 지정했나요?

Copilot reviewed 5 out of 15 changed files in this pull request and generated no comments.

Files not reviewed (10)

• BE/package-lock.json: Language not supported
• BE/package.json: Language not supported
• BE/src/game/service/game.chat.service.ts: Evaluated as low risk
• BE/src/common/interceptor/SocketEventLoggerInterceptor.ts: Evaluated as low risk
• BE/src/game/game.gateway.ts: Evaluated as low risk
• BE/src/game/game.module.ts: Evaluated as low risk
• BE/src/game/interceptor/gameActivity.interceptor.ts: Evaluated as low risk
• BE/src/game/redis/subscribers/player.subscriber.ts: Evaluated as low risk
• BE/src/app.module.ts: Evaluated as low risk
• BE/src/game/service/game.service.ts: Evaluated as low risk

Comments suppressed due to low confidence (2)

BE/src/metric/metric.service.ts:215

• The calculateSystemStats method has commented-out code that should either be removed or uncommented if it's necessary.

private calculateSystemStats(startSystemMetrics: SystemMetricSnapshot, systemSnapshots: SystemMetricSnapshot[]) {

BE/src/metric/metric.service.ts:282

• The calculatePercentile method returns 0 if the sortedValues array is empty. This might be intended, but we should confirm.

if (sortedValues.length === 0) return 0;

Copilot reviewed 5 out of 15 changed files in this pull request and generated no comments.

Files not reviewed (10)

• BE/package-lock.json: Language not supported
• BE/package.json: Language not supported
• BE/src/metric/metric.controller.ts: Evaluated as low risk
• BE/src/game/interceptor/gameActivity.interceptor.ts: Evaluated as low risk
• BE/src/game/redis/subscribers/player.subscriber.ts: Evaluated as low risk
• BE/src/game/service/game.chat.service.ts: Evaluated as low risk
• BE/src/game/service/game.service.ts: Evaluated as low risk
• BE/src/metric/interfaces/metric.interface.ts: Evaluated as low risk
• BE/src/metric/metric.interceptor.ts: Evaluated as low risk
• BE/src/metric/metric.module.ts: Evaluated as low risk

Comments suppressed due to low confidence (1)

BE/src/game/game.gateway.ts:30

• The new MetricInterceptor functionality is not covered by tests. Ensure that the metrics collection is properly tested.

@UseInterceptors(MetricInterceptor)