Step 21 of 250: Universal Event Model (Event Sourcing, Pub/Sub, DLQ)
Universal Event Model & Event Sourcing Core
Event-driven core architecture powering asynchronous communication across 10+ ITOS tenants. Features immutable event sourcing audit logs, schema-validated Pub/Sub topics, and Dead Letter Queue (DLQ) fault tolerance.
3
Event Store Sequence Log
48 920
Events Dispatched Today
14 Topics
Active Subscriptions
0 Pending
DLQ Retry Queue
📜 Immutable Event Sourcing Audit Log
APPEND-ONLY LOG| Event ID | Event Type | Tenant Scope | Source Module | Correlation ID | Timestamp |
|---|---|---|---|---|---|
| evt_sys_1001 | TENANT_PROVISIONED | nexus | multi_tenant_engine | corr_8912 | 15:00:00 |
| evt_sys_1002 | LEAD_QUALIFIED | missillusia | ai_consultant | corr_9015 | 17:15:30 |
| evt_sys_1003 | INVOICE_PAID | nexus | platform_adapters | corr_9921 | 19:45:10 |
| evt_1787546943601_yy4p | LEAD_QUALIFIED | missillusia | ai_consultant | corr_1787546943601 | 11:49:03 |
⚡ Live Event Publication & Schema Registry Simulator
Simulating real-time dispatch of domain event `LEAD_QUALIFIED` across event bus:
EVENT TYPE: LEAD_QUALIFIED DISPATCHED & PERSISTED
{
"eventId": "evt_1787546943601_yy4p",
"eventType": "LEAD_QUALIFIED",
"aggregateId": "lead_10822",
"tenantId": "missillusia",
"actorUserId": "usr_ai_agent",
"timestamp": "2026-08-24T04:49:03.601Z",
"version": 1,
"payload": {
"clientEmail": "cto@globaltech.io",
"expectedARRUSD": 48000
},
"metadata": {
"correlationId": "corr_1787546943601",
"sourceModule": "ai_consultant",
"environment": "production"
}
}