Inspecting a running JVM heap means attaching to the live process and reading the Java objects it holds. Four JDK tools do that: jcmd, jmap, jstat, …

HotSpot memory management places Java objects in the heap and reclaims them when they become unreachable. Mutators allocate; a garbage collector …

Sentinel is Alibaba’s library for flow control, concurrency limiting, circuit breaking, and system protection. An application protects a named …

The JDK does not define a single random-number subsystem. It exposes distinct APIs in java.util, java.util.concurrent, java.security, and, since Java …

A Java thread pool separates task submission from task execution. Submitting threads hand Runnable objects to an ExecutorService; a set of worker …

The Fork/Join Framework (java.util.concurrent) supports structured parallelism: a problem is split recursively into subtasks that run in parallel, …

java.util.stream.Stream is the public face of Java 8’s functional-style aggregate operations. Under the hood it is not a data structure — it is …

java.util.concurrent.ConcurrentHashMap is a highly concurrent, thread-safe hash table in the Java Collections Framework. It allows full concurrency of …

java.util.HashMap is a hash table-based implementation of the Map interface in the Java Collections Framework, permitting null keys and null values. …

Spring Transaction is one of the most critical modules in the Spring Framework. Whether using the declarative @Transactional or the programmatic …

Spring Cache provides a lightweight abstraction over caching implementations and is driven by annotations such as @Cacheable, @CachePut, and …

This Article introduces Java Temporal Objects

This article introduces Java Class and Class File format.

Annotation in java is a marker which associates information with a program element, but has no effect at runtime.

Proxy in java allows dynamic creation of class at runtime.

Spring Expression Language (“SpEL for short”) is a powerful expression language that support querying and manipulating an object graph at …

This article introduces spring-cloud-context

This article introduce java project management and comprehension tool - Maven

本文记录jvm线程内部实现

本文记录Netty架构与实现

Reactor is a fourth-generation reactive library, based on Reactive Streams specification, for building non-blocking applications on JVM

This Article introduces NACOS

本文介绍spring Core Container

WebFlux is non-blocking, asynchronous web framework based on project Reactor.

Spring Cloud Gateway aims to provide a simple, yet effective way to route to APIs and provide cross cutting concerns to them such as : Security, …

This post describes the HotSpot representation of a Java object: the object header and its mark word, how locking, hashing and garbage collection …

本文介绍 Mybatis 以及 spring-mybatis 的架构与实现

本文记录spring logging 的原理与配置

ReentrantLock, Semaphore, and CountDownLatch look unrelated at the API level, but each holds a private Sync extends AbstractQueuedSynchronizer. The …

本文记录tomcat 架构与实现

本文记录spring 安全相关的内容

本文记录 spring aop 架构与实现

This article describes Spring MVC

本文记录jdk提供的并发编程基础模块 - 线程池与异步执行框架

本文记录java Nio的接口与实现

本文介绍springBoot架构与实现