Fictional case study · Document 07 · Weeks 1–2
Technical Approach and Delivery Plan
Technical leads define the target, migration sequence and release safeguards.
Illustrative project record. AegisShield, BookEasy, the people, decisions and outcomes are fictional.
Service flow
BookEasy systems → connector → AegisShield event API → PostgreSQL → existing detection rules → analyst dashboard. The connector prepares and delivers events; an HTTP library such as Axios can make requests, but is not itself the connector.
Methodology used
This project uses a hybrid approach. We use a planned approach for scope, risks, approvals, dates, and release decisions. We use small delivery and test steps for the technical work, so the team can find and fix issues before moving forward.
Planned changes
| Area | Approach | Owner |
|---|---|---|
| Runtime and libraries | Move Node 14 to Node 24 LTS; review Express, Passport and Axios and update compatible versions after testing. | Engineering lead |
| Database | Rehearse PostgreSQL 12 to 17 using a supported migration method and verify restore and data integrity. | Database engineer |
| Connector | Use stable event IDs and controlled retries; suppress duplicates and expose delivery failures. | Backend engineer |
| Operations | Monitor ingestion failures, queue/retry behavior and service health; document on-call procedures. | DevOps/SRE |
Delivery safeguards
Build and test in a non-production environment using sanitized or synthetic events. Rehearse the migration and restore, then use a controlled production window with a tested rollback. The team compares versions and compatibility before deploying; target versions are fictional case choices, not advice to upgrade blindly.
Delivery sequence and technical clarifications
The sequence is: confirm compatibility and target versions; implement in a test environment; rehearse migration and recovery; run functional, security, integration, duplicate, monitoring and rollback tests; validate the pilot with BookEasy; then request sponsor approval for production. Proposed targets are Node.js 24 and PostgreSQL 17, pending compatibility validation and technical-owner approval. The connector checks a stable event ID against processed-event records before writing, so retries do not create duplicates. During migration, incoming events follow the agreed controlled path and are tracked for replay or reconciliation. Database restore recovers data; application rollback returns the prior application version. No separate queue is assumed in this case; monitoring tracks request, retry and delivery status directly. The migration rehearsal must pass before production approval.