主要介绍了使用队列(Queue)解决简单的并发问题，讲解的很细致，喜欢的朋友们可以了解一下

概要介绍： 本门课程属于“Java分布式中间件大汇聚实战”系列课程，主要介绍了企业级项目中真实的应用场景的实现及主流的Java核心技术栈（Redis、RabbitMQ、Spring AOP、Redisson、ZooKeeper…）的实战等等。除此之外，还介绍了如何基于Redis设计并实战一款点赞系统（点赞、取消点赞、排行榜、用户中心、文章点赞用户列表…）可以说技术干货甚多，不仅可以巩固企业级应用系统的开发实战能力，相信在面试、跳槽涨薪方面也能带来相应的帮助！ 课程内容： 传说中的金三银四、面试跳槽涨薪季已经来临，Debug特地为大家准备了一系列跟面试、跳槽、巩固核心技术栈相关的课程，本门课程属于第一季，其中的内容包括企业级项目中真实的应用场景实战、面试相关的技术点分享、主流的Java技术栈（Undertow、Redis、RabbitMQ、Spring AOP、Redisson、ZooKeeper…）实战等等。 除此之外，我们还基于Redis设计并实战了一款点赞系统，可以说技术干货甚多。在课程的最后，Debug给大家整理了一份最新的面向BAT大厂招聘 ~ 2020年程序猿最新的Java面

Make the most of Kotlin by leveraging design patterns and best practices to build scalable and high performing apps Key Features Understand traditional GOF design patterns to apply generic solutions Shift from OOP to FP; covering reactive and concurrent patterns in a step-by-step manner Choose the best microservices architecture and MVC for your development environment Book Description Design patterns enable you as a developer to speed up the development process by providing you with proven development paradigms. Reusing design patterns helps prevent complex issues that can cause major problems, improves your code base, promotes code reuse, and makes an architecture more robust. The mission of this book is to ease the adoption of design patterns in Kotlin and provide good practices for programmers. The book begins by showing you the practical aspects of smarter coding in Kotlin, explaining the basic Kotlin syntax and the impact of design patterns. From there, the book provides an in-depth explanation of the classical design patterns of creational, structural, and behavioral families, before heading into functional programming. It then takes you through reactive and concurrent patterns, teaching you about using streams, threads, and coroutines to write better code along the way By the end of the book, you will be able to efficiently address common problems faced while developing applications and be comfortable working on scalable and maintainable projects of any size What you will learn Get to grips with Kotlin principles, including its strengths and weaknesses Understand classical design patterns in Kotlin Explore functional programming using built-in features of Kotlin Solve real-world problems using reactive and concurrent design patterns Use threads and coroutines to simplify concurrent code flow Understand antipatterns to write clean Kotlin code, avoiding common pitfalls Learn about the design considerations necessary while choosing between architectures Who This Book Is For This book is for developers who would like to master design patterns with Kotlin to build efficient and scalable applications. Basic Java or Kotlin programming knowledge is assumed Table of Contents Getting Started with Kotlin Working with Creational Patterns Understanding Structural Patterns Getting familiar with Behavioral Patterns Pattern implementation using Functional Programming Exploring Streams Staying reactive Introduction: Threads and Coroutines Designed for concurrency Anti-patterns and Idioms Simplifying microservices and MVC

H323话务产生器是－兼具 voice 及 video 的voip 测试软件，简易的使用介面，让使用者轻松建立自己的测试场景，而完整的sip 之 voice/video 7层模拟功能更是此套测试仪的精

线程池 - 合理配置 1. CPU密集型任务，就需要尽量压榨CPU，参考可以设置为NCPU+1 2. IO密集型任务，参考可以设置为2*NCPU > NCPU = CPU的数量 > UCPU = 期望对CPU的使用率 0 ≤ UCPU ≤ 1 > W/C = 等待时间与计算时间的比率 > 如果希望处理器达到理想的使用率，那么线程池的最优大小为： > 线程池大小=NCPU *UCPU(1+W/C)

Synchronized原理-思维导图

常用的几种实时调度算法 (1)．最早截止时间优先算法(EDF) 该算法要求在系统中保持一个实时任务就绪队列，该队列按各任务截止时间的早晚排序；具有最早截止时间的任务排在队列的最前面。调度程序总是选择就绪队列中的第一个任务，为之分配处理机，使之投入运行。

由浅入深解析synchronized锁的机制，各种锁的概念的介绍，膨胀过程，基于redis的分布式锁demo。

亿级流量网站架构核心技术 跟开涛学搭建高可用高并发系统.pdf(带书签)

### 开发过程: - maven项目,jdk1.8,utf编码 - 根据联通提供的SGIP1.2接口文档,封装协议,编写通信流程 - 下行短信(发送短信给手机用户),里面有两种方式发送短信,一种是Socket,一种是NIO,NIO的性能较高 - 上行短信(接收手机用户的短信),实际是接收联通短信中心SMG发过来的信息,为了应对高并发的场景,使用了生产者和消费者典型的多线程设计方案,用线程池去管理多线程,需要改动相关代码,找到类SCIPServer修改即可,接收短信的方式有两种一种是Socket,一种是NIO,NIO实际测试会出现SP验证失败,所以目前还没有解决,不要使用NIO方式接收短信 - 日志工具使用的是logback,更简单,更高效的日志工具 - 使用了lombok简化代码,属性上加@Setter与Getter即可实现setter与getter方法