Packt.Spring.2.5.Aspect.Oriented.Programming下载

weixin_39821620 2019-06-30 04:30:16

Packt.Spring.2.5.Aspect.Oriented.Programming
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Packt.Spring.2.5.Aspect.Oriented.Programming

If you want to learn how to get around the Spring framework and use it to build your own amazing applications, then this book is for you. Beginning with an introduction to Spring and setting up the environment, the book will teach you in detail about the Bean life cycle and help you discover the power of wiring for dependency injection. Gradually, you will learn the core elements of Aspect-Oriented Programming and how to work with Spring MVC and then understand how to link to the database and persist data configuring ORM, using Hibernate. You will then learn how to secure and test your applications using the Spring-test and Spring-Security modules. At the end, you will enhance your development skills by getting to grips with the integration of RESTful APIs, building microservices, and doing reactive programming using Spring, as well as messaging with WebSocket and STOMP.

In computer programming, paradigms abound: Some examples are imperative programming, structured (go to less) programming, object-oriented programming, aspect-oriented programming, and declarative programming. Lately, there has been renewed interest in a particular paradigm that can arguably be considered to be older than most (if not all) of the cited ones--functional programming. Functional Programming (FP) emphasizes writing functions, and connecting them in simple ways to produce more understandable and more easily tested code. Thus, given the increased complexity of today's web applications, it's logical that a safer, cleaner way of programming would be of interest. This interest in FP comes hand-in-hand with the evolution of JavaScript. Despite its somewhat hasty creation (reportedly managed in only 10 days, in 1995, by Brendan Eich at Netscape), today it's a standardized and quickly growing language, with features more advanced than most other similarly popular languages. The ubiquity of the language, which can now be found in browsers, servers, mobile phones, and whatnot, has also impelled interest in better development strategies. Also, even if JavaScript wasn't conceived as a functional language by itself, the fact is that it provides all the features you'd require to work in that fashion, which is another plus. It must also be said that FP hasn't been generally applied in industry, possibly because it has a certain aura of difficulty, and is thought to be theoretical rather than practical, even mathematical, and possibly uses vocabulary and concepts that are foreign to developers--Functors? Monads? Folding? Category theory? While learning all this theory will certainly be of help, it can also be argued that even with zero knowledge of the previous terms, you can understand the tenets of FP, and see how to apply it in your programming. FP is not something you have to do on your own, without any help. There are many libraries and frameworks that incorporate, in greater or lesser degrees, the concepts of FP. Starting with jQuery (which does include some FP concepts), passing through Underscore and its close relative LoDash, or other libraries such as Ramda, and getting to more complete web development tools such as React and Redux, Angular, or Elm (a 100% functional language, which compiles into JavaScript), the list of functional aids for your coding is ever growing. Learning how to use FP can be a worthwhile investment, and even though you may not get to use all of its methods and techniques, just starting to apply some of them will pay dividends in better code. You need not try to apply all of FP from the start, and you need not try to abandon every non-functional feature in the language either. JavaScript assuredly has some bad features, but it also has several very good and powerful ones. The idea is not to throw everything you learned and use and adopt a 100% functional way; rather, the guiding idea is evolution, not revolution. In that sense, it can be said that what we'll be doing is not FP, but rather Sorta Functional Programming (SFP), aiming for a fusion of paradigms. A final comment about the style of the code in this book--it is quite true that there are several very good libraries that provide you with functional programming tools: Underscore, LoDash, Ramda, and more are counted among them. However, I preferred to eschew their usage, because I wanted to show how things really work. It's easy to apply a given function from some package or other, but by coding everything out (a vanilla FP, if you wish), it's my belief that you get to understand things more deeply. Also, as I will comment in some places, because of the power and clarity of arrow functions and other features, the pure JS versions can be even simpler to understand!

Getting Started with Spring Microservices begins with an overview of the Spring Framework 5.0, its design patterns, and its guidelines that enable you to implement responsive microservices at scale. You will learn how to use GoF patterns in application design. You will understand the dependency injection pattern, which is the main principle behind the decoupling process of the Spring Framework and makes it easier to manage your code. Then, you will learn how to use proxy patterns in aspect-oriented programming and remoting. Moving on, you will understand the JDBC template patterns and their use in abstracting database access. After understanding the basics, you will move on to more advanced topics, such as reactive streams and concurrency. Written to the latest specifications of Spring that focuses on Reactive Programming, the Learning Path teaches you how to build modern, internet-scale Java applications in no time. Next, you will understand how Spring Boot is used to deploying serverless autonomous services by removing the need to have a heavyweight application server. You’ll also explore ways to deploy your microservices to Docker and managing them with Mesos. By the end of this Learning Path, you will have the clarity and confidence for implementing microservices using Spring Framework. This Learning Path includes content from the following Packt products: Spring 5 Microservices by Rajesh R V Spring 5 Design Patterns by Dinesh Rajput What you will learn Develop applications using dependency injection patterns Build web applications using traditional Spring MVC patterns Utilize the reactive programming pattern to build reactive web apps Learn concurrency and handle multiple connections inside a web server Use Spring Boot and Spring Cloud to develop microservices Leverage reactive programming to build cloud-native applications

Spring 是一个开源框架，提供了一系列工具和组件，用于构建企业级应用程序。它基于 Java 平台，由 Rod Johnson 在2002年创建，并于2004年发布第一个正式版本。Spring 的设计理念是轻量级、松耦合、非侵入式的，旨在简化企业级应用程序的开发。Spring IOC：控制反转（Inversion of Control，IOC）容器，负责管理对象的生命周期和依赖关系。

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