Add CQRS and caching support for OrganizationIntegrations

[brant-livefront]

📔 Objective

This PR extends the work in PR #6650 where we added caching to the event integration configurations. The PR handled the read side of the cache, this PR (and an additional followup) will handle the write side of the PR. That is, when an integration is changed in the DB, we need to flush the cache so that any stale records are removed. This PR focuses on just the OrganizationIntegration piece and an additional PR will be added for OrganizationIntegrationConfigurations.

The DI piece is a bit tricky for these. Since they are dependent on the named extended cache, they can't be instantiated with the rest of the OrganizationFeatures pieces. Instead, this PR creates EventIntegrationsServiceCollectionExtensions (and associated tests) to create a clean way for Startup in API to get them into the service collection cleanly. This extension will be a landing place for more of the custom event integration methods in ServiceCollectionExtensions in future PRs. It will be a big help to have those separated out and testable.

Finally, there's a few cleanup things that I noticed in doing this work. We were allowing someone to change the integration type when updating an integration (which would also have cache implications). Instead, I've changed it to deny an update that changes the IntegrationType (that should be a brand new integration instead).

This PR represents a replacement for #6675 which will be closed. I'm splitting those changes up into more digestible PRs.

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[claude]

Claude finished @brant-livefront's task —— View job

---

Code Review Complete ✅

Summary

I've completed a comprehensive review of PR #6689. Overall Assessment: APPROVE

This PR successfully implements the CQRS pattern for OrganizationIntegrations with proper cache invalidation on the write side. The code quality is high, test coverage is comprehensive, and the implementation follows Bitwarden's coding standards.

---

Key Findings

✅ Strengths:

• Proper CQRS separation between Commands and Queries
• Correct cache invalidation timing (after DB operations)
• Comprehensive test coverage (100% of scenarios covered)
• Excellent validation logic (prevents type changes, checks duplicates)
• Clean dependency injection setup with proper idempotency
• Follows Bitwarden ADRs (TryAdd pattern, nullable references)

❓ Questions for Clarification:

Race condition in CreateAsync duplicate check

In src/Core/AdminConsole/EventIntegrations/OrganizationIntegrations/CreateOrganizationIntegrationCommand.cs:22-27:

var existingIntegrations = await integrationRepository
    .GetManyByOrganizationAsync(integration.OrganizationId);
if (existingIntegrations.Any(i => i.Type == integration.Type))
{
    throw new BadRequestException("An integration of this type already exists for this organization.");
}

If two create requests for the same integration type arrive simultaneously, both could pass the duplicate check before either writes to the database. Is this protected by:

• Database unique constraint on (OrganizationId, Type)?
• Transaction isolation at the repository level?
• Application-level locking?

Cache invalidation transaction semantics

All three commands call cache.RemoveByTagAsync() after the repository operation but potentially before the database transaction commits. Example from UpdateOrganizationIntegrationCommand.cs:36-41:

await integrationRepository.ReplaceAsync(updatedIntegration);
await cache.RemoveByTagAsync(
    EventIntegrationsCacheConstants.BuildCacheTagForOrganizationIntegration(
        organizationId: organizationId,
        integrationType: integration.Type
    ));

Does ReplaceAsync complete the transaction before returning? The cache-aside pattern appears safe regardless, but confirming transaction semantics would be helpful.

🎨 Suggested Improvements (Optional):

1. Consider extracting duplicate validation logic

The duplicate type check in CreateOrganizationIntegrationCommand.cs could be extracted to a reusable validation method for better testability and explicitness. Current implementation is clear, so this is minor.

2. Add integration tests for distributed cache invalidation

While unit tests verify cache invalidation is called, integration tests would verify that:

• Cache tags propagate correctly through the backplane (Redis)
• Updates from one API instance invalidate cache on other instances
• The extended cache infrastructure works end-to-end

Current test coverage is adequate for merge, but consider adding these in a follow-up for production confidence.

3. Consider adding cache metrics/logging

Adding debug-level logging for cache invalidation operations would aid production observability:

logger.LogDebug(
    "Invalidating cache for organization {OrganizationId} integration type {IntegrationType}",
    organizationId,
    integration.Type);

Would help with debugging cache issues and understanding invalidation patterns.

---

Security & Compliance

✅ Authorization: All controller endpoints properly check OrganizationOwner permissions
✅ Cache Scoping: Organization-scoped cache tags prevent cross-org pollution
✅ Immutability Protection: Update command correctly prevents changing IntegrationType after creation
✅ ADR Compliance: Uses TryAdd pattern (ADR 0026), proper nullable types, follows authorization patterns

---

Technical Implementation

✅ CQRS Pattern: Commands and Queries properly separated with no side effects in queries
✅ Cache Invalidation: Correct timing (after DB success) with proper tag-based invalidation
✅ Validation Logic:

• Create checks for duplicate integration types
• Update validates ownership, existence, and prevents type changes
• Delete validates organization ownership

✅ Test Coverage: Excellent coverage across all scenarios (happy paths, error cases, cache verification)

---

Files Reviewed (18 files)

Controllers: OrganizationIntegrationController.cs - Refactored to use CQRS
Commands: Create, Update, Delete - All implement proper validation + cache invalidation
Queries: Get - Simple passthrough (appropriate)
Interfaces: All 4 interfaces with comprehensive XML documentation
DI Configuration: EventIntegrationsServiceCollectionExtensions + Startup.cs
Tests: 5 test files with comprehensive coverage
Documentation: README.md updated

---

Verdict

👍 Approve - This is solid work that correctly implements the write-side cache invalidation using the CQRS pattern. The two questions raised are for clarification only and don't block merge. All critical requirements are met, and the code follows Bitwarden standards.

---

[github-actions]

Checkmarx One – Scan Summary & Details – cc7733b4-a0a6-4436-ad46-b82fbde5e912

Fixed Issues (1)

Great job! The following issues were fixed in this Pull Request

Severity	Issue	Source File / Package
	CSRF	/src/Api/AdminConsole/Public/Controllers/MembersController.cs: 207

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.64%. Comparing base (813fad8) to head (fef9a1b).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6689      +/-   ##
==========================================
- Coverage   57.42%   53.64%   -3.79%     
==========================================
  Files        1921     1926       +5     
  Lines       85650    85720      +70     
  Branches     7687     7687              
==========================================
- Hits        49187    45981    -3206     
- Misses      34618    37967    +3349     
+ Partials     1845     1772      -73     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

The base branch was changed.