fix(analytics): order by timestamp #1926
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #1926 +/- ##
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+ Coverage 15.90% 15.93% +0.02%
- Complexity 481 482 +1
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Files 256 257 +1
Lines 7866 7871 +5
Branches 821 821
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+ Hits 1251 1254 +3
- Misses 6565 6567 +2
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WalkthroughThe changes in this pull request involve the addition of a new method Changes
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Actionable comments posted: 1
🧹 Outside diff range and nitpick comments (3)
src/main/java/ai/elimu/dao/jpa/VideoLearningEventDaoJpa.java (1)
35-42: Consider implementing pagination for large datasets.While the implementation is correct, fetching all events at once could lead to performance issues with large datasets. Consider implementing pagination to improve memory efficiency and response times.
Example pagination implementation:
-public List<VideoLearningEvent> readAllOrderedByTimestamp(OrderDirection orderDirection) throws DataAccessException { +public List<VideoLearningEvent> readAllOrderedByTimestamp(OrderDirection orderDirection, int page, int pageSize) throws DataAccessException { return em.createQuery( "SELECT event " + "FROM VideoLearningEvent event " + "ORDER BY event.timestamp " + orderDirection) + .setFirstResult(page * pageSize) + .setMaxResults(pageSize) .getResultList(); }src/main/java/ai/elimu/web/analytics/VideoLearningEventListController.java (1)
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42-73: Consider optimizing the chart data preparationWhile the current implementation works correctly, consider optimizing the chart data preparation by:
- Moving the aggregation logic to the database layer
- Using a dedicated DTO for chart data
- Implementing pagination for large datasets
This would improve performance by reducing memory usage and processing time.
Example optimization:
@Query("SELECT new ai.elimu.dto.MonthlyEventCount(FUNCTION('DATE_FORMAT', e.timestamp, '%b-%Y'), COUNT(e)) " + "FROM VideoLearningEvent e " + "WHERE e.timestamp >= :startDate " + "GROUP BY FUNCTION('DATE_FORMAT', e.timestamp, '%b-%Y')") List<MonthlyEventCount> getMonthlyEventCounts(@Param("startDate") Calendar startDate);src/main/java/ai/elimu/web/analytics/VideoLearningEventCsvExportController.java (1)
40-40: Add documentation for the ordering choice.While the ascending order is correct for CSV exports, it would be helpful to add a comment explaining why this specific order was chosen. This helps maintain consistency if the code is modified in the future.
+ // Using ascending order for CSV exports to maintain chronological order in spreadsheet views List<VideoLearningEvent> videoLearningEvents = videoLearningEventDao.readAllOrderedByTimestamp(OrderDirection.ASC);
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⛔ Files ignored due to path filters (1)
src/main/resources/db/analytics_PROD/eng/video-learning-events.csvis excluded by!**/*.csv,!**/*.csv
📒 Files selected for processing (5)
src/main/java/ai/elimu/dao/VideoLearningEventDao.java(1 hunks)src/main/java/ai/elimu/dao/enums/OrderDirection.java(1 hunks)src/main/java/ai/elimu/dao/jpa/VideoLearningEventDaoJpa.java(2 hunks)src/main/java/ai/elimu/web/analytics/VideoLearningEventCsvExportController.java(2 hunks)src/main/java/ai/elimu/web/analytics/VideoLearningEventListController.java(2 hunks)
✅ Files skipped from review due to trivial changes (1)
- src/main/java/ai/elimu/dao/enums/OrderDirection.java
🔇 Additional comments (7)
src/main/java/ai/elimu/dao/VideoLearningEventDao.java (2)
3-7: LGTM! Clean import organization.
The new import for OrderDirection enum is properly placed, and the imports are well-organized.
14-14: LGTM! Well-designed method signature.
The new method readAllOrderedByTimestamp is well-designed:
- Clear and descriptive method name
- Appropriate return type and parameter
- Proper exception handling with
DataAccessException - Enables flexible ordering for both analytics dashboard (DESC) and CSV exports (ASC)
Let's verify the implementation and usage:
✅ Verification successful
Method implementation and usage verified successfully
The verification confirms:
- Implementation in
VideoLearningEventDaoJpauses JPA query with proper ordering by timestamp - Used correctly in two places:
VideoLearningEventCsvExportControllerwithOrderDirection.ASCfor chronological exportsVideoLearningEventListControllerwithOrderDirection.DESCfor latest-first dashboard view
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Verify the implementation and usage of readAllOrderedByTimestamp
# Test 1: Check the implementation in VideoLearningEventDaoJpa
echo "Checking implementation..."
ast-grep --pattern 'class VideoLearningEventDaoJpa {
$$$
readAllOrderedByTimestamp($_) {
$$$
}
$$$
}'
# Test 2: Verify usage in controllers
echo "Checking usage in controllers..."
rg -A 5 "readAllOrderedByTimestamp.*OrderDirection"
Length of output: 2903
src/main/java/ai/elimu/dao/jpa/VideoLearningEventDaoJpa.java (2)
4-4: LGTM: Import statements are properly organized.
The new imports are necessary for the added functionality and follow the project's import organization pattern.
Also applies to: 7-7, 8-8
35-42: Verify interface contract implementation.
Let's verify that this implementation matches the interface contract and is being used correctly by the controllers mentioned in the summary.
✅ Verification successful
Implementation correctly matches interface contract and usage patterns
The verification confirms:
- Interface contract in
VideoLearningEventDao.javamatches the implementation - Method is used correctly in two controllers:
VideoLearningEventListController: Uses DESC order for displaying eventsVideoLearningEventCsvExportController: Uses ASC order for CSV export
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Verify interface definition and controller usage
# Test 1: Check interface definition
echo "Checking VideoLearningEventDao interface definition..."
rg -A 5 "readAllOrderedByTimestamp.*OrderDirection" --type java
# Test 2: Check controller usage patterns
echo "Checking controller usage patterns..."
rg -A 5 "readAllOrderedByTimestamp.*DESC" --type java
rg -A 5 "readAllOrderedByTimestamp.*ASC" --type java
Length of output: 4654
src/main/java/ai/elimu/web/analytics/VideoLearningEventListController.java (1)
4-4: LGTM: Import statement is correctly placed
The new import for OrderDirection enum is properly organized with other DAO-related imports.
src/main/java/ai/elimu/web/analytics/VideoLearningEventCsvExportController.java (2)
4-4: LGTM: Import added for new ordering functionality.
The OrderDirection enum import is correctly placed and necessary for the new timestamp-based ordering feature.
40-41: Verify error handling for the new ordering method.
The new readAllOrderedByTimestamp method might throw additional exceptions that should be handled appropriately.
Let's verify the implementation of the DAO method:
src/main/java/ai/elimu/web/analytics/VideoLearningEventListController.java
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Issue Number
VideoLearningEvent#1894Purpose
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