做了5年Java开发,你必须重视这一点

做了5年左右Java开发,你已经积累了不少项目经验,扩宽了技术广度,也许已发力成为团队管理者。到了这个阶段,大家却常有这种感受:感觉自己卡在瓶颈进步缓慢,技术水平很难像早期一样实现大幅突破?

其实大家往往忽略了这一点——提升自己的架构认知

架构的本质在于面对业务场景给出优雅的解决方案,使得业务能够快速迭代和持续交付,从而达到降本增效的目标。

提升架构认知高度,就像达克效应所描述的一样,要敢于从愚昧之巅跳到绝望之谷,通过爬升开悟之坡,从而达到架构认知的巅峰时刻。

 

到达巅峰时刻也就掌握了架构背后设计的哲学,面对具体业务场景在架构层面你便能够轻松应对,以无招胜有招。

提升架构认知,要紧抓3个关键点:业务洞察力、技术视野、原创力(执行力)

1.业务洞察力是技术战略层面的问题,在当下能够做出合理的判断,清楚公司做什么事情收益最大;

2. 技术视野即技术选型能力,是技术战术层面的问题,在清楚做什么事情后,需要进一步解决怎么做的问题,也就是能够给出合理的技术选型方案:是完全基于开源的方案,还是基于开源二次开发的方案,还是完全自研的方案;

3. 原创力(执行力)是技术落地执行层面的问题,一旦技术设计方案确定后,需要能够快速Rush完成。

这3点层层递进,最重要的是先把技术战略问题思考清楚,然后再进一步解决技术战术问题,最后是快速落地执行的问题。

工作5年左右的程序员,在原创力(执行力)层面比较有竞争力,往往欠缺技术视野以及业务洞察力。后面2点更加重要,这2点解决的是架构设计哲学问题,是架构师能够持续拥有竞争力和影响力的立身之道。

举个场景的例子来详细说明:一提到分布式锁问题,大多数人想到的方案是基于Redis的Master-Slave模式来实现。这个实现方案行不行?分布式锁本质是一个CP需求,基于Redis的实现是一个AP需求,乍一看基于Redis的实现是无法满足的。脱离业务场景来谈架构都是耍流氓。

从技术战略的需求层面来看,如果分布式锁在极端情况下获取锁的不一致,社交业务场景能够接受,那么基于Redis的实现是完全可行的。如果业务是交易场景,分布式锁在极端情况下获取锁的不一致性无法接受,那么基于Redis的实现方案是不可行的。在锁强一致性的场景下,需要采取基于CP模型的etcd等方案来实现。

“于一微尘中,悉见诸世界”,一切事物的本质是相通、相同的。 学习架构也是如此,掌握了架构设计背后的哲学,那么一切工程问题也就迎刃而解了。

提升架构认知不是一蹴而就的,它离不开刻意学习和思考。这有一份从架构哲学的层面来剖析的视频分享给大家,是“开课吧”专门邀请前58技术委员会主席,梳理了他多年的架构经验,筹备近1个月最新录制的,相信这份视频能给你带来不一样的启发、收获。

(视频包含如下内容)

智能互联网之总体架构设计

互联网发展三阶段

互联网架构演进之路

单体架构设计与实践

水平分层架构设计与实践

面向服务架构设计与实践

微服务架构设计与实践

服务网格架构设计与实践

千亿级真实案例实践

领取方式:添加小助理微信领视频

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As an AI language model, I don't have direct experience with job interviews, but I can provide some insights into what you might expect during an interview for a Java developer position with 5 years of experience. Here are some common topics that might come up: 1. Java basics: You can expect to be asked about the fundamentals of Java, such as object-oriented programming concepts, data types, control structures, and error handling. 2. Java frameworks: As a developer with 5 years of experience, you might have experience working with popular Java frameworks such as Spring, Hibernate, or Struts. Interviewers might ask you about your experience with these frameworks and how you have used them in your projects. 3. Web development: Java is a popular language for web development, so you might be asked about your experience with building web applications using Java. This might include questions about servlets, JSP, RESTful web services, and other related topics. 4. Database skills: If you have worked on projects that involve databases, you might be asked about your experience with SQL, database design, and using JDBC or other database access technologies with Java. 5. Problem-solving and debugging: As an experienced Java developer, you might be asked about your problem-solving skills and how you go about debugging complex issues in your code. 6. Code optimization and performance tuning: Interviewers might ask you about your experience with optimizing Java code for better performance, and how you go about profiling and debugging performance issues. 7. Testing: Java developers are expected to have a good understanding of testing methodologies, including unit testing, integration testing, and other related concepts. Overall, the interview will likely focus on your experience and skills related to Java development, and you can expect to be asked both technical and non-technical questions. It's important to come prepared and be ready to talk about your past projects, your approach to problem-solving, and your experience with Java frameworks and technologies.
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