Every lab

What it covers

• Circuit Breaker and Retries lab Crash, slow down or overload a dependency. Tune the breaker, timeouts, backoff and jitter, and see which settings contain the failure and which spread it.
• Saga lab Run an order across inventory, payment and shipping. Fail a step and watch the compensations run, then add missing refunds, duplicate messages and failed compensations. Switch between orchestration and choreography.
• Transactional Outbox lab Crash a service between its database write and its event publish, and count lost events, ghost shipments and duplicates. Then switch on the outbox and an idempotent consumer and compare.
• Bulkhead lab Share a thread pool between a critical and a slow dependency, watch checkouts starve, then partition the pool, tune the timeout and size each pool from the load.
• Rate Limiting lab Let one client flood a shared API and watch normal users suffer. Add a per-client token bucket, compare instant retries with honouring Retry-After, and see what a limit or burst that is too generous does.