Java

ByteBufAllocator class hierarchy, AbstractByteBufAllocator, unpooled allocation, and pooled allocation

Trace postProcessBeforeInstantiation and postProcessAfterInitialization while creating singleton Beans

Select a NioEventLoop, create a ChannelPromise/Future, register the channel through Unsafe with the JDK NIO selector, and invoke handlerAdded/initChannel callbacks.

1. Prepare experiment data 2. Start debugging 3-7. Propagate the exception through handlers to TailContext

Historical example of allocating, reading, writing, and releasing a pooled direct ByteBuf

Trace to postProcessBeforeInstantiation, determine whether a proxy is needed, wrap the Bean with advisors, and create JDK/CGLIB proxies

1. Channel class hierarchy 2. Config class hierarchy

Invoke Calc.div, enter the proxy intercept method, build the interceptor chain, and execute interceptors plus the target method

newDirectBuffer, PoolThreadLocalCache, PoolThreadCache, and PoolArena

Constructor and the tiny, small, and normal MemoryRegionCache groups