内容简介：Since its launch towards the end of 2014, Lambda has created a lot of hype, and more importantly, brought the term “serverless” into the industry. At its core, “serverless” does not mean that there are no servers or anything; there are servers, but you are
Since its launch towards the end of 2014, Lambda has created a lot of hype, and more importantly, brought the term “serverless” into the industry. At its core, “serverless” does not mean that there are no servers or anything; there are servers, but you are not the one managing those servers. You don’t know where your code is running, you don’t SSH into a server, you don’t do anything that you’d do with regular servers or VMs. You just give a function you’d like to execute to Lambda and let it run the code for you.
As an example, let’s say you have a function that takes a list of products and calculates the price of the whole cart, including various subtotals, shipping prices, and grand totals. If this is one piece of a bigger service, then it might be fine to keep it there. However, if this is a functionality that will be shared between different use-cases, or if this is a full service on its own, then you need to consider how to deploy, manage, and scale it. This exact point is where serverless platforms like Lambda jump in:
- Build a ZIP archive of your code
- Upload it to Lambda
- Map an API Gateway to your lambda function
- Bam, you are done: you have a service that can scale infinitely, requires no maintenance, and can be deployed straight from a ZIP archive.
Alright, the “ infinite scaling ” part may be a bit stretch. It is still software that is running on physical hardware, and there are a bunch of challenges maintaining a smooth scaling from one request to one million requests per minute , but in practical terms, you as the developer don’t need to care about it, the platform itself will handle that.
Devo: My Ideal Usecase
The reason I have been using Lambda is my side project, Devo . Devo is a simple open-source new-tab extension that displays home pages of a bunch of platforms, such as GitHub Trending , Hacker News , Product Hunt or DEV . I found myself visiting these pages quite frequently, and I thought “ why not have them ready in every new tab? ”, which then lead to the project itself.
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Spring实战（第4版）
Craig Walls 沃尔斯 / 张卫滨 / 人民邮电出版社 / 2016-4-1 / CNY 89.00
《Spring实战（第4版）》是经典的、畅销的Spring学习和实践指南。 第4版针对Spring 4进行了全面更新。全书分为四部分。第1部分介绍Spring框架的核心知识。第二部分在此基础上介绍了如何使用Spring构建Web应用程序。第三部分告别前端，介绍了如何在应用程序的后端使用Spring。第四部分描述了如何使用Spring与其他的应用和服务进行集成。 《Spring实战（第4......一起来看看 《Spring实战（第4版）》 这本书的介绍吧!
