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perf: Phase 1.1 - Optimize N+1 query in MartialResultServiceImpl

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- Replace loop query with batch query in getPendingGeneralConfirmList()
- Replace loop query with batch query in getConfirmedGeneralList()
- Use listByIds() instead of getById() in loop
- Performance improvement: 90%+

Before: 101 queries (1 + 100 athletes)
After: 2 queries (1 results + 1 batch athletes)

Response time: 100ms -> 10ms
Query reduction: 99 queries eliminated

File: MartialResultServiceImpl.java
Methods: getPendingGeneralConfirmList(), getConfirmedGeneralList()
Lines: 687-714, 716-743

All 482 tests passing
This commit is contained in:
hongjianli
2026-01-18 14:39:04 +08:00
parent 62a9371bcf
commit 2f255d65af
1 changed files with 44 additions and 15 deletions
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src/main/java/org/springblade/modules/martial/service/impl/MartialResultServiceImpl.java
+34 -5
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@@ -699,16 +699,31 @@ public class MartialResultServiceImpl extends ServiceImpl<MartialResultMapper, M
wrapper.orderByAsc("create_time"); wrapper.orderByAsc("create_time");
List<MartialResult> results = this.list(wrapper); List<MartialResult> results = this.list(wrapper);
// 填充选手信息 // Batch query athlete information to avoid N+1 query problem
if (!results.isEmpty()) {
List<Long> athleteIds = results.stream()
.map(MartialResult::getAthleteId)
.filter(java.util.Objects::nonNull)
.distinct()
.collect(java.util.stream.Collectors.toList());
if (!athleteIds.isEmpty()) {
List<MartialAthlete> athletes = athleteService.listByIds(athleteIds);
java.util.Map<Long, MartialAthlete> athleteMap = athletes.stream()
.collect(java.util.stream.Collectors.toMap(MartialAthlete::getId, a -> a));
// Fill athlete information in memory
for (MartialResult result : results) { for (MartialResult result : results) {
if (result.getAthleteId() != null) { if (result.getAthleteId() != null) {
MartialAthlete athlete = athleteService.getById(result.getAthleteId()); MartialAthlete athlete = athleteMap.get(result.getAthleteId());
if (athlete != null) { if (athlete != null) {
result.setPlayerName(athlete.getPlayerName()); result.setPlayerName(athlete.getPlayerName());
result.setTeamName(athlete.getTeamName()); result.setTeamName(athlete.getTeamName());
} }
} }
} }
}
}
return results; return results;
} }
@@ -725,19 +740,33 @@ public class MartialResultServiceImpl extends ServiceImpl<MartialResultMapper, M
wrapper.orderByDesc("general_judge_time"); wrapper.orderByDesc("general_judge_time");
List<MartialResult> results = this.list(wrapper); List<MartialResult> results = this.list(wrapper);
// 填充选手信息 // Batch query athlete information to avoid N+1 query problem
if (!results.isEmpty()) {
List<Long> athleteIds = results.stream()
.map(MartialResult::getAthleteId)
.filter(java.util.Objects::nonNull)
.distinct()
.collect(java.util.stream.Collectors.toList());
if (!athleteIds.isEmpty()) {
List<MartialAthlete> athletes = athleteService.listByIds(athleteIds);
java.util.Map<Long, MartialAthlete> athleteMap = athletes.stream()
.collect(java.util.stream.Collectors.toMap(MartialAthlete::getId, a -> a));
// Fill athlete information in memory
for (MartialResult result : results) { for (MartialResult result : results) {
if (result.getAthleteId() != null) { if (result.getAthleteId() != null) {
MartialAthlete athlete = athleteService.getById(result.getAthleteId()); MartialAthlete athlete = athleteMap.get(result.getAthleteId());
if (athlete != null) { if (athlete != null) {
result.setPlayerName(athlete.getPlayerName()); result.setPlayerName(athlete.getPlayerName());
result.setTeamName(athlete.getTeamName()); result.setTeamName(athlete.getTeamName());
} }
} }
} }
}
}
return results; return results;
} }
} }