<ul data-eligibleForWebStory="true"><li>Day 1 focused on building a plug-and-play Spring Boot multitenancy starter with key implementations like TenantContextHolder, TenantResolver, TenantFilter, and more.</li><li>Core concepts included Thread-safe TenantContextHolder, TenantResolver interface, TenantFilter for context management, and TenantRegistry for registering tenants.</li><li>Custom YAML properties were implemented using HikariTenantPoolProperties and Spring Boot AutoConfig classes like MultitenancyAutoConfiguration.</li><li>Tests were added to validate isolation, simulate misuse, and stress test concurrency.</li><li>Learned about Java Concurrency concepts like ThreadLocal and Maven structuring for local publishing and IDE tricks.</li><li>Explored Spring Boot internals including @ImportAutoConfiguration flow and starter module design.</li><li>Next steps include building a tenant onboarding workflow, linking the demo app, and exposing per-tenant endpoints.</li><li>The project is structured with modules for the Spring Boot multitenancy starter and upcoming demo components.</li></ul>

Day 1 of My Spring Boot Multitenancy Starter: Contexts, Filters, and Auto-Config

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