Cache Miss Request Sequence

Cache Miss Request Sequence A sequence diagram generated by Archify. open page GET /dashboard verify JWT claims ok read cache miss query profile + metrics rows set cache emit trace 200 JSON render Request Fallback Response + trace User · browser session · Sequence participant User browser session Web App · React UI · Sequence participant Web App React UI API · request handler · Sequence participant API request handler Auth · JWT verify · Sequence participant Auth JWT verify Redis · cache · Sequence participant Redis cache Postgres · source of truth · Sequence participant Postgres source of truth Trace · async event · Sequence participant Trace async event Legend request return security async trace default message

Happy Path

  • • The main request is Web App -> API -> data source -> response
  • • Return messages are quieter than forward calls
  • • Activation bars make ownership duration visible

Policy + Fallback

  • • JWT verification is colored as a security interaction
  • • Cache miss is visible without overpowering the main path
  • • Database access only appears after cache fallback

Async Trace

  • • Trace emission is dashed and secondary
  • • It does not block the response path
  • • The diagram separates user-facing latency from observability