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Overview

:::info Source Sourced from services/enrollment-service/SERVICE_OVERVIEW.md in the documentation repo. :::

1. Purpose​

Owns Enrollment aggregate — per-learner per-course-version record. Created by purchase saga, assignment, manual admin, or self-signup. Tracks state and lifecycle.

2. Bounded Context​

Enrollment (Supporting). UL: Enrollment, Seat, EnrollmentState, CourseVersionRef.

3. Responsibilities​

  • Create enrollments from upstream events (purchase, assignment, manual, self).
  • Track state (active → completed | expired | revoked).
  • Emit state-change events for downstream (delivery, progress, notification, analytics).
  • Validate (courseVersion exists, seat available, tenant has license).
  • Handle revocation (refund, admin, license expiry).

4. Non-Responsibilities​

  • Does not grade (assessment); does not record progress (progress-service).
  • Does not issue certificates.
  • Does not own licenses (marketplace).

5. Dependencies​

  • Upstream: marketplace (license.granted), assignment (window.opened), tenant (manual enrollment).
  • Downstream: delivery (bundle creation trigger), progress (attempt creation), notification, certification.

6. Slices​

  • S1 (M1): Basic enrollment + self-signup.
  • S3 (M2): Purchase-driven enrollment via saga.
  • S4 (M3): Assignment-driven enrollment.

7. Architectural Freeze Points​

  • F30 — Enrollment lifecycle: M1 start; state enum additive.

8. Key Invariants​

  • One active Enrollment per (tenantId, userId, courseId, source.ref).
  • Enrollment state: active → completed | expired | revoked (terminal).
  • Tenant isolation; cannot enroll cross-tenant except via explicit cross-tenant license.