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""" WalkthroughThe changes update the school domain to include lunch, deadline, and quota information. The Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant SchoolController
participant SchoolService
participant SchoolQuotaCacheManager
Client->>SchoolController: GET /schools
SchoolController->>SchoolService: getAvailableSchools()
loop for each school
SchoolService->>SchoolQuotaCacheManager: getCurrentQuantity(schoolName)
SchoolQuotaCacheManager-->>SchoolService: currentQuantity
end
SchoolService-->>SchoolController: List<AvailableSchoolResponse>
SchoolController-->>Client: ApiResponseWrapper<List<AvailableSchoolResponse>>
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Summary of Changes
Hello @wlgns12370, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request primarily enhances the school inquiry functionality by integrating the current number of applicants directly into the school data returned by the API. This provides users with more immediate and relevant information about school availability. Additionally, the underlying school data model has been refined to include more detailed information such as lunch options and application deadlines, improving the overall data representation.
Highlights
- Enhanced School Information: The
getSchoolsendpoint now returns anAvailableSchoolResponsewhich includes thecurrentQuantity(current number of applicants) for each school, providing more comprehensive information to users. - New Data Transfer Object: A new DTO,
AvailableSchoolResponse, has been introduced to specifically encapsulate the school details along with the current applicant count. - School Response Model Update: The
SchoolResponseDTO has been refactored to includelunch,lunchPrice, anddeadlineTimefields, and the nestedaddressobject has been removed, simplifying the response structure. - Database Initialization Update: The
DatabaseInitializerhas been updated to populate the initial school data with values for the newly addedlunch,lunchPrice, anddeadlineTimefields, and the dummy school names have been changed.
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Actionable comments posted: 2
🔭 Outside diff range comments (1)
src/main/java/life/mosu/mosuserver/presentation/school/SchoolControllerDocs.java (1)
30-35: Fix inconsistent Swagger documentation schema.The method signature was updated to return
AvailableSchoolResponse, but the@ApiResponsecontent schema still referencesSchoolResponse.class. This inconsistency could mislead API consumers about the actual response structure.@ApiResponse(responseCode = "200", description = "학교 목록 조회 성공", - content = @Content(array = @ArraySchema(schema = @Schema(implementation = SchoolResponse.class)))), + content = @Content(array = @ArraySchema(schema = @Schema(implementation = AvailableSchoolResponse.class)))),
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (6)
src/main/java/life/mosu/mosuserver/application/school/SchoolService.java(2 hunks)src/main/java/life/mosu/mosuserver/global/initializer/DatabaseInitializer.java(2 hunks)src/main/java/life/mosu/mosuserver/presentation/school/SchoolController.java(2 hunks)src/main/java/life/mosu/mosuserver/presentation/school/SchoolControllerDocs.java(2 hunks)src/main/java/life/mosu/mosuserver/presentation/school/dto/AvailableSchoolResponse.java(1 hunks)src/main/java/life/mosu/mosuserver/presentation/school/dto/SchoolResponse.java(2 hunks)
🔇 Additional comments (6)
src/main/java/life/mosu/mosuserver/presentation/school/SchoolController.java (1)
34-38: LGTM! Controller properly updated for new response type.The controller correctly calls the renamed service method and returns the new
AvailableSchoolResponsetype, maintaining consistency with the overall refactoring.src/main/java/life/mosu/mosuserver/global/initializer/DatabaseInitializer.java (1)
116-182: LGTM! School initialization properly updated with new fields.The initialization correctly adds the new
deadlineTime,lunch, andlunchPricefields to all schools, supporting the enhanced school data model. The data structure is consistent and well-formed.src/main/java/life/mosu/mosuserver/presentation/school/dto/SchoolResponse.java (1)
7-30: LGTM! SchoolResponse correctly updated with new fields.The record structure and factory method properly map the new
lunch,lunchPrice, anddeadlineTimefields while removing theaddressfield. The area mapping change fromname()togetAreaName()is also correctly implemented.src/main/java/life/mosu/mosuserver/presentation/school/dto/AvailableSchoolResponse.java (1)
1-36: LGTM! Clean and well-designed DTO implementation.The
AvailableSchoolResponserecord is properly structured with all necessary fields, and the static factory method correctly maps data fromSchoolResponsewhile adding thecurrentQuantityfield. The implementation follows good practices and supports the PR objective of including current applicant counts.src/main/java/life/mosu/mosuserver/application/school/SchoolService.java (2)
5-5: LGTM: Import addition is appropriate.The new import for
AvailableSchoolResponseis correctly added to support the enhanced response structure.
21-21: Remove inaccurate breaking-change warningAll references to the old
getSchools()service method have been updated togetAvailableSchools(), and no calls toschoolService.getSchools()remain in the codebase. The controller still exposes thegetSchools()endpoint (unchanged) and delegates to the new service method, so there’s no broken consumer.• No occurrences of
schoolService.getSchools()found
• Controller docs and implementation retain the same endpoint name and have been updated to useAvailableSchoolResponsePlease disregard the original breaking-change comment.
Likely an incorrect or invalid review comment.
| .map(school -> { | ||
| SchoolResponse schoolResponse = SchoolResponse.from(school); | ||
|
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||
| Long currentQuantity = schoolQuotaCacheManager.getSchoolApplicationCounts( | ||
| schoolResponse.schoolName()); | ||
|
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| return AvailableSchoolResponse.from(schoolResponse, currentQuantity); | ||
| }) |
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🛠️ Refactor suggestion
Add error handling and consider performance optimization.
The implementation has several potential issues:
- No error handling: The cache manager call could fail, causing the entire operation to fail
- N+1 problem: Making individual cache calls for each school could be inefficient
- Null handling: No handling for null
currentQuantityvalues
Consider this improved implementation:
return schoolJpaRepository.findAll()
.stream()
- .map(school -> {
- SchoolResponse schoolResponse = SchoolResponse.from(school);
-
- Long currentQuantity = schoolQuotaCacheManager.getSchoolApplicationCounts(
- schoolResponse.schoolName());
-
- return AvailableSchoolResponse.from(schoolResponse, currentQuantity);
- })
+ .map(school -> {
+ SchoolResponse schoolResponse = SchoolResponse.from(school);
+
+ try {
+ Long currentQuantity = schoolQuotaCacheManager.getSchoolApplicationCounts(
+ schoolResponse.schoolName());
+ return AvailableSchoolResponse.from(schoolResponse,
+ currentQuantity != null ? currentQuantity : 0L);
+ } catch (Exception e) {
+ // Log error and return with default count
+ log.warn("Failed to get application count for school: {}",
+ schoolResponse.schoolName(), e);
+ return AvailableSchoolResponse.from(schoolResponse, 0L);
+ }
+ })
.toList();For better performance, consider batch operations if the cache manager supports it:
// Get all school names first
List<String> schoolNames = schoolJpaRepository.findAll()
.stream()
.map(School::getName)
.toList();
// Batch get application counts
Map<String, Long> applicationCounts = schoolQuotaCacheManager.getBatchApplicationCounts(schoolNames);
// Then map with cached results
return schoolJpaRepository.findAll()
.stream()
.map(school -> {
SchoolResponse schoolResponse = SchoolResponse.from(school);
Long currentQuantity = applicationCounts.getOrDefault(schoolResponse.schoolName(), 0L);
return AvailableSchoolResponse.from(schoolResponse, currentQuantity);
})
.toList();🤖 Prompt for AI Agents
In src/main/java/life/mosu/mosuserver/application/school/SchoolService.java
around lines 25 to 32, the current code calls the cache manager individually for
each school without error handling, causing potential failures and performance
issues due to N+1 calls, and lacks null handling for currentQuantity. Refactor
to first collect all school names, then perform a batch cache call to get
application counts in one operation, handle any exceptions from the cache
manager gracefully, and use getOrDefault to assign zero when currentQuantity is
null before mapping to AvailableSchoolResponse.
| public class SchoolService { | ||
|
|
||
| private final SchoolJpaRepository schoolJpaRepository; | ||
| private final SchoolQuotaCacheManager schoolQuotaCacheManager; |
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💡 Verification agent
🧩 Analysis chain
Verify cache manager implementation for performance and reliability.
The new dependency schoolQuotaCacheManager is properly injected, but ensure that:
- The cache manager is optimized for batch operations if dealing with many schools
- It has proper error handling and fallback mechanisms
- Cache invalidation strategies are in place for real-time accuracy
🏁 Script executed:
#!/bin/bash
# Description: Verify the SchoolQuotaCacheManager implementation for performance and error handling
# Search for the cache manager implementation
ast-grep --pattern 'class SchoolQuotaCacheManager {
$$$
}'
# Also search for the getSchoolApplicationCounts method implementation
ast-grep --pattern 'getSchoolApplicationCounts($$$) {
$$$
}'Length of output: 127
🏁 Script executed:
#!/bin/bash
# Locate the SchoolQuotaCacheManager implementation file
echo "Searching for SchoolQuotaCacheManager.java..."
fd --extension java SchoolQuotaCacheManager
# If found, inspect class declaration and key methods
for file in $(fd --extension java SchoolQuotaCacheManager); do
echo -e "\n--- Inspecting $file ---"
# Show class declaration and first 200 lines
sed -n '1,200p' "$file" | sed -n '/class SchoolQuotaCacheManager/,/^}/p'
echo -e "\nMethod definitions in $file:"
grep -RnoP 'public\s+.*getSchoolApplicationCounts' "$file"
grep -RnoP 'public\s+.*batch' "$file"
grep -RnoP -i 'error|exception|fail' "$file"
grep -RnoP -i 'invalidate|evict|clear' "$file"
doneLength of output: 3583
Implement batching, error handling, and cache invalidation in SchoolQuotaCacheManager
The current implementation in
src/main/java/life/mosu/mosuserver/application/school/SchoolQuotaCacheManager.java
uses per‐key loops and has no error handling or eviction logic. To improve performance and reliability, please:
- Replace individual
setcalls incacheSchoolMaxCapacities()andcacheSchoolCurrentApplicationCounts()with Redis pipelining oropsForValue().multiSet()for bulk writes. - Wrap all Redis operations (
set,get,increment,decrement) in try/catch blocks and fall back toschoolRepositoryreads if Redis is unavailable. - Add cache expiration or explicit invalidation methods (e.g.
redisTemplate.expire(...)orinvalidateSchoolCache(String schoolName)) to ensure real-time accuracy.
🤖 Prompt for AI Agents
In
src/main/java/life/mosu/mosuserver/application/school/SchoolQuotaCacheManager.java
around line 18, the current cache methods use per-key loops without error
handling or cache eviction. Refactor cacheSchoolMaxCapacities() and
cacheSchoolCurrentApplicationCounts() to use Redis pipelining or
opsForValue().multiSet() for bulk writes to improve performance. Wrap all Redis
operations like set, get, increment, and decrement in try/catch blocks to handle
Redis failures gracefully by falling back to schoolRepository reads. Add cache
expiration settings or implement explicit cache invalidation methods such as
invalidateSchoolCache(String schoolName) using redisTemplate.expire(...) to
maintain cache accuracy.
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Code Review
This pull request adds the current number of applicants to the school list API endpoint. The changes are mostly in the service and presentation layers, with a new DTO to carry the additional information.
My review has identified a few issues:
- A significant performance bottleneck (N+1 problem) in
SchoolServicedue to repeated Redis calls. - A potential issue where the number of applicants could be
nullinstead of0. - An inconsistency in the API documentation where the response schema doesn't match the implementation.
I've provided suggestions to address these points to improve performance and correctness.
| return schoolJpaRepository.findAll() | ||
| .stream() | ||
| .map(SchoolResponse::from) | ||
| .map(school -> { | ||
| SchoolResponse schoolResponse = SchoolResponse.from(school); | ||
|
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||
| Long currentQuantity = schoolQuotaCacheManager.getSchoolApplicationCounts( | ||
| schoolResponse.schoolName()); | ||
|
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||
| return AvailableSchoolResponse.from(schoolResponse, currentQuantity); | ||
| }) | ||
| .toList(); |
There was a problem hiding this comment.
This implementation has a performance issue known as the N+1 problem. It iterates through all schools and makes a separate call to Redis for each school inside the map function. This can lead to a large number of network requests and slow down the API response, especially as the number of schools grows.
To optimize this, you should fetch all school application counts in a single batch request.
Here's a suggested approach:
- Fetch all schools from the repository.
- Collect all school names.
- Make a single batch call to
SchoolQuotaCacheManagerto get all counts (this would require adding a new method toSchoolQuotaCacheManagerthat accepts a list of school names and uses Redis'MGETcommand). - Create a map of school names to their application counts.
- Stream over the schools list and use the map to look up the count for each school.
Example implementation:
public List<AvailableSchoolResponse> getAvailableSchools() {
List<SchoolJpaEntity> schools = schoolJpaRepository.findAll();
List<String> schoolNames = schools.stream()
.map(SchoolJpaEntity::getSchoolName)
.toList();
// This method would need to be implemented in SchoolQuotaCacheManager
// to perform a batch fetch from Redis.
Map<String, Long> applicationCounts = schoolQuotaCacheManager.getSchoolApplicationCountsInBatch(schoolNames);
return schools.stream()
.map(school -> {
SchoolResponse schoolResponse = SchoolResponse.from(school);
Long currentQuantity = applicationCounts.getOrDefault(school.getSchoolName(), 0L);
return AvailableSchoolResponse.from(schoolResponse, currentQuantity);
})
.toList();
}This change will significantly improve the performance of this endpoint.
| school.lunchPrice(), | ||
| school.deadlineTime(), | ||
| school.examDate(), | ||
| currentQuantity, |
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The schoolQuotaCacheManager.getSchoolApplicationCounts() method can return null if a school has no applications yet and its count is not in the cache. This will result in currentQuantity being null in the API response, which can be problematic for clients.
It's better to treat a missing count as zero. You can ensure currentQuantity is never null by providing a default value here.
| currentQuantity, | |
| currentQuantity != null ? currentQuantity : 0L, |
| @@ -31,5 +32,5 @@ public interface SchoolControllerDocs { | |||
| content = @Content(array = @ArraySchema(schema = @Schema(implementation = SchoolResponse.class)))), | |||
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The OpenAPI documentation for this endpoint is incorrect. The schema implementation is set to SchoolResponse.class, but the controller method now returns a list of AvailableSchoolResponse. This will cause the generated API documentation to show the wrong response model for clients.
Please update the schema to use AvailableSchoolResponse.class to match the actual response type.
| content = @Content(array = @ArraySchema(schema = @Schema(implementation = SchoolResponse.class)))), | |
| content = @Content(array = @ArraySchema(schema = @Schema(implementation = AvailableSchoolResponse.class)))), |
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Actionable comments posted: 1
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (3)
src/main/java/life/mosu/mosuserver/domain/school/SchoolJpaRepository.java(1 hunks)src/main/java/life/mosu/mosuserver/global/initializer/DatabaseInitializer.java(8 hunks)src/main/java/life/mosu/mosuserver/presentation/school/SchoolControllerDocs.java(2 hunks)
🚧 Files skipped from review as they are similar to previous changes (1)
- src/main/java/life/mosu/mosuserver/presentation/school/SchoolControllerDocs.java
🔇 Additional comments (5)
src/main/java/life/mosu/mosuserver/global/initializer/DatabaseInitializer.java (5)
5-5: Import additions look appropriate.The new imports for
LocalDateTime,UUID, and payment-related classes are correctly added to support the enhanced initialization logic.Also applies to: 12-12, 28-32, 65-65
80-82: Method signature change is properly implemented.The
initializeApplicationsmethod now returns the created application schools to enable subsequent payment initialization, which is the correct approach for the data dependency chain.
128-136: School initialization enhanced with required fields.The school initialization now includes the new
deadlineTime,lunch, andlunchPricefields, providing realistic test data that aligns with the enhanced school model.Also applies to: 138-146, 147-156, 158-166, 167-176, 178-186
193-195: Application initialization properly refactored.The method signature and logic have been updated to collect and return created application schools, enabling the payment initialization flow.
Also applies to: 196-196, 219-219, 234-234, 238-239
241-280: Payment initialization logic is well-implemented.The payment initialization creates a balanced dataset with half successful and half failed payments, which provides good test coverage for the payment status filtering logic in the repository query.
The implementation correctly:
- Creates realistic payment amounts with proper breakdown
- Uses appropriate payment methods and statuses
- Maintains referential integrity with application schools
- Provides balanced test data distribution
| LEFT JOIN PaymentJpaEntity p ON p.applicationSchoolId = a.id | ||
| WHERE p.paymentStatus = 'DONE' |
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Fix query logic to include schools with zero paid applications.
The current WHERE clause will exclude schools that have no applications with successful payments from the result set entirely. This is likely incorrect behavior - schools with 0 paid applications should still appear in the results with a count of 0.
Move the payment status condition to the JOIN clause to preserve schools with zero paid applications:
- LEFT JOIN PaymentJpaEntity p ON p.applicationSchoolId = a.id
- WHERE p.paymentStatus = 'DONE'
+ LEFT JOIN PaymentJpaEntity p ON p.applicationSchoolId = a.id AND p.paymentStatus = 'DONE'This ensures all schools are included in the results, with accurate counts of only successfully paid applications.
🤖 Prompt for AI Agents
In src/main/java/life/mosu/mosuserver/domain/school/SchoolJpaRepository.java
around lines 15 to 16, the WHERE clause filtering on p.paymentStatus = 'DONE'
excludes schools without paid applications. To fix this, move the paymentStatus
= 'DONE' condition from the WHERE clause into the LEFT JOIN condition itself.
This change will preserve all schools in the results, including those with zero
paid applications, while still counting only successfully paid applications.
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