feat: implement scheduling service by markstockhausen · Pull Request #33 · ls1intum/memo

markstockhausen · 2026-02-03T09:09:25Z

Description

Implemented and optimized the Scheduling Service to utilize O(1) algorithms for the Coverage Pipeline and O(log n) for the Consensus Pipeline. Refactored database schema to support denormalized 'degree' counting for performance scaling.

Type of Change

Changes Made

Server:
- Implemented 'SchedulingService' with dual pipeline logic (Coverage + Consensus)
- Created 'CompetencyRelationshipVote' entity and repository
- Added 'degree' column to 'Competency' table (V7 migration) for O(1) lookup
- Refactored 'CompetencyRelationshipService' to maintain degree counts on writes
- Updated 'CompetencyRelationshipRepository' with optimized queries (NOT EXISTS)
- Exposed 'SchedulingController' for task fetching and voting
Database:
- V7 Migration: Added 'degree' column and index to 'competencies'
- Reset schema to ensure clean slate for degree counting
Documentation:
- Added 'scheduling_service_presentation.md' with detailed complexity analysis

Testing

Test Cases

Existing functionality still works
New functionality works as expected (Scheduling pipelines)
Edge cases handled appropriately (Concurrency, Cold Start)

Manual Testing

Tested in development environment (Docker + Spring Boot)
Verified degree counters increment correctly on manual relationship creation

github-actions · 2026-02-03T09:09:52Z

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github-actions · 2026-02-03T09:13:10Z

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Pull request overview

Implements a new backend scheduling/voting flow for competency relationship mapping, backed by new tables for aggregated vote counts + raw vote logs and a denormalized degree counter to prioritize low-connected competencies. Also includes minor frontend typography/style updates (Geist fonts, badge weight, subtle gradient tweak).

Changes:

Added Scheduling Service + Controller to fetch relationship tasks (coverage/consensus pipelines) and submit votes.
Introduced new scheduling/voting schema (relationships table w/ aggregated counters + vote log table) and a degree column on competencies with backfill/index.
Updated UI styling: switched default fonts to Geist, adjusted badge font weight, tweaked homepage gradient opacity.

Reviewed changes

Copilot reviewed 20 out of 22 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
src/pages/HomePage.tsx	Minor gradient opacity tweak.
src/index.css	Adds Geist font-face definitions and switches CSS variables/body font to Geist.
src/components/ui/badge.tsx	Changes badge font weight from medium to semibold.
server/src/main/resources/db/migration/V7__add_competency_degree.sql	Adds `degree` column + index and backfills from existing relationships.
server/src/main/resources/db/migration/V6__create_scheduling_tables.sql	Creates new denormalized `competency_relationships` + vote log table with indexes/constraints.
server/src/main/resources/db/migration/V5__drop_old_relationships.sql	Drops legacy relationships table/constraints.
server/src/main/resources/db/migration/V2__seed_sample_data.sql	Removes seeding of legacy competency relationships.
server/src/main/java/de/tum/cit/memo/service/SchedulingService.java	Core coverage/consensus scheduling logic and vote submission with entropy updates.
server/src/main/java/de/tum/cit/memo/service/CompetencyRelationshipService.java	Refactors relationship creation to maintain denormalized degree counter and add find-or-create behavior.
server/src/main/java/de/tum/cit/memo/repository/CompetencyRepository.java	Adds degree-based query + atomic degree increment method.
server/src/main/java/de/tum/cit/memo/repository/CompetencyRelationshipVoteRepository.java	New repository for vote log access and existence checks.
server/src/main/java/de/tum/cit/memo/repository/CompetencyRelationshipRepository.java	Refactors repository API and adds scheduling queries (entropy, batch relationship fetch, NOT EXISTS).
server/src/main/java/de/tum/cit/memo/entity/CompetencyRelationshipVote.java	New JPA entity for per-user per-relationship vote log rows.
server/src/main/java/de/tum/cit/memo/entity/CompetencyRelationship.java	Refactors entity to aggregated counters/entropy + timestamps (removes per-row relationship_type/user_id).
server/src/main/java/de/tum/cit/memo/entity/Competency.java	Adds denormalized `degree` field.
server/src/main/java/de/tum/cit/memo/dto/VoteResponse.java	New DTO for returning updated vote counts + entropy after voting.
server/src/main/java/de/tum/cit/memo/dto/VoteRequest.java	New DTO for submitting a vote.
server/src/main/java/de/tum/cit/memo/dto/RelationshipTaskResponse.java	New DTO for returning scheduled relationship tasks.
server/src/main/java/de/tum/cit/memo/controller/SchedulingController.java	New REST endpoints for fetching next task and voting.
server/src/main/java/de/tum/cit/memo/controller/CompetencyRelationshipController.java	Changes POST to upsert relationship + record a vote through SchedulingService.
public/fonts/GeistMono-Variable.woff2	Adds Geist Mono font asset for new typography.

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github-actions · 2026-02-09T23:34:47Z

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github-actions · 2026-02-09T23:45:04Z

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github-actions · 2026-02-10T00:00:50Z

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github-actions · 2026-02-10T00:20:08Z

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github-actions · 2026-02-10T00:36:37Z

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markstockhausen · 2026-02-25T11:52:20Z

@MaximilianAnzinger Ready to review

markstockhausen added 4 commits February 3, 2026 02:22

style: change font and polish UI

650775a

style: update font weight

79e45a2

style: conform to Prettier formatting

430e1c2

Implement optimized Scheduling Service and Pipeline Logic

73a402b

markstockhausen requested a review from MaximilianAnzinger as a code owner February 3, 2026 09:09

markstockhausen self-assigned this Feb 3, 2026

github-actions Bot added enhancement New feature or request client-application 🎨 Client-side/UI changes labels Feb 3, 2026

markstockhausen changed the title ~~implement scheduling service~~ feat: implement scheduling service Feb 3, 2026

style: update comments

8850cf6

markstockhausen requested review from Copilot and vtotalova February 9, 2026 23:14

Copilot started reviewing on behalf of markstockhausen February 9, 2026 23:15 View session

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ls1intum deleted a comment from Copilot AI Feb 9, 2026

Implement AI suggestions

fe676c3

Update Axios, Optimise scheduling pipeline

b199432

github-actions Bot added the dependencies 📦 Dependency updates label Feb 9, 2026

Optimise pipeline logic and clean up code

67d6e58

Optimise pipeline

60d7f66

Update logic for bidirectional relationship types

6251a3a

Copilot AI reviewed Feb 10, 2026

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ls1intum deleted a comment from Copilot AI Feb 17, 2026

markstockhausen added 3 commits February 17, 2026 02:42

Implement AI suggestions

64c4f20

Further AI suggestions

d863e77

Merge branch 'main' into feature/implement-scheduling-service

846fd3d

Update scheduling logic

a1ffb6f

Fix undo edge case

ef72e01

Fix severities

5786c58

github-actions Bot added the configuration ⚙️ Configuration file changes label Feb 24, 2026

Conform to Prettier formatting

cb45f20

Update swap logic

566dd19

vtotalova reviewed Feb 25, 2026

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Comment thread src/lib/api/scheduling.ts Outdated

Comment thread src/pages/SessionPage.tsx Outdated

remove unused code

dea46d1

Remove later to be added DashboardPage

83112f7

vtotalova approved these changes Feb 26, 2026

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MaximilianAnzinger approved these changes Feb 27, 2026

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MaximilianAnzinger merged commit 8e0bafc into main Feb 27, 2026
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MaximilianAnzinger deleted the feature/implement-scheduling-service branch February 27, 2026 11:19

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markstockhausen commented Feb 3, 2026

Description

Type of Change

Changes Made

Testing

Test Cases

Manual Testing

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github-actions Bot commented Feb 9, 2026

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github-actions Bot commented Feb 17, 2026

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github-actions Bot commented Feb 24, 2026

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github-actions Bot commented Feb 24, 2026

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