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Recommended order is metadata, not a lock. Every listed chapter is directly available.

Java Foundations

J00availableJava from zero J01availableValues & flow J02availableEquality & hash J03availablePolymorphism J04availableGenerics & collections

JVM & Concurrency

J05availableExceptions & resources J06availableClassloading & bytecode J07availableHeap & GC evidence J08availableThreads & the JMM

Spring request to database

S00availableRequest system atlas S01availableRequest cost X-ray S02availableJava objects & Spring DI S03availableContainer internals S04availableWeb boundary S05availablePersistence S06availableConcurrency

S03·Spring request to database·implemented

Definition, resolution, scope, lifecycle, and backoff

Run six reviewed container scenarios in isolated ApplicationContexts and defend the refresh decisions.

REAL_ISOLATED_APPLICATION_CONTEXTCAPTURED_LIFECYCLENOT_OBSERVEDabout 60 min

Outcomes

• Trace definition to instance resolution.
• Explain singleton and prototype ownership.
• Diagnose ambiguity, cycles, and conditional backoff.

Recommended context

• s02-java-objects-spring-di

Endpoint family / fixed variants

• /api/labs/container-internals

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Container internals available.