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Spring 5.0 Cookbook
Spring 5.0 Cookbook

Spring 5.0 Cookbook: Recipes to build, test, and run Spring applications efficiently

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Profile Icon Sherwin John C. Tragura
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Full star icon Full star icon Full star icon Half star icon Empty star icon 3.5 (2 Ratings)
Paperback Sep 2017 670 pages 1st Edition
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Arrow left icon
Profile Icon Sherwin John C. Tragura
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$19.99 per month
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.5 (2 Ratings)
Paperback Sep 2017 670 pages 1st Edition
eBook
$29.99 $43.99
Paperback
$54.99
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Free Trial
Renews at $19.99p/m
eBook
$29.99 $43.99
Paperback
$54.99
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Spring 5.0 Cookbook

Learning Dependency Injection (DI)

After a series of installations and configurations, this chapter will begin the discussion on how Spring Framework 5.0 works from its core. The recipes here will define the characteristics of Spring 5.0 as a framework. We will connect the dots starting from where the objects are created up to the layers where the series of data transactions, services and controllers are interconnected.

In this chapter, you will learn about the following:

  • Implementing a Spring container using XML
  • Implementing a Spring container using JavaConfig
  • Managing beans in an XML-based container
  • Managing the beans in a JavaConfig container
  • Creating Singleton and Prototype beans
  • Defining eager and lazy spring beans
  • Creating an inner bean
  • Injecting Collections and Properties
  • Creating a Spring MVC using an XML-based approach
  • Creating a Spring MVC using the JavaConfig approach...

Implementing a Spring container using XML

Let us begin with the creation of the Spring Web Project using the Maven plugin of our STS Eclipse 8.3. This web project will be implementing our first Spring 5.0 container using the XML-based technique. This is the most conventional but robust way of creating a Spring container.

The container is where the objects are created, managed, wired together with their dependencies, and monitored from their initialization up to their destruction. This recipe will mainly highlight how to create an XML-based Spring container.

Getting started

Create a Maven project ready for development using the STS Eclipse 8.3. Be sure you have installed the correct JRE. Let us name the project ch02-xml.

...

Implementing a Spring container using JavaConfig

Another option for implementing the Spring 5.0 container is through the use of Spring JavaConfig. This is a technique that uses pure Java classes in configuring the framework's container. This solution eliminates the use of bulky and tedious XML metadata and also provides a type-safe and refactoring-free approach in configuring entities or collections of objects into the container. This recipe will showcase how to create the container using JavaConfig in a web.xml-less approach.

Getting started

Create another Maven project using the methodology in Chapter 1, Getting Started with Spring, and name the project ch02-xml. This STS Eclipse project will be using a Java class approach...

Managing beans in an XML-based container

Frameworks become a popular because of the principle behind the architecture they built from. Each framework is built from different design patterns that manage the creation and behavior of the objects they manage. This recipe will detail how Spring 5.0 manages objects of the applications and how it shares a set of methods and functions across the platform.

Getting started

The two Maven projects previously created will be utilized to illustrate how Spring 5.0 loads objects into the heap. We will also be utilizing the ApplicationContext rather than the BeanFactory container in preparation for the next recipes involving more Spring components.

...

Managing beans in the JavaConfig container

The JavaConfig approach provides an easier, straightforward and programmatical way of loading beans to the container. This approach uses annotations and classes to manage the lifespan of the objects, the dependencies, and the injection of values and objects to setters and constructors. The next recipe showcases how to construct and utilize a Java-based ApplicationContext container.

Getting started

Let us create and use the ch02-jc project to create our first annotation-based ApplicationContext container. We will be using the same model classes presented in the recent recipe.

How to do...

Creating Singleton and Prototype beans

Creating beans to the containers is not enough for any project specification using the Spring framework. It is always necessary to determine the lifespan of the beans through bean scopes. The following recipe will determine how to optimize a container by creating Singleton and Prototypes beans.

Getting started

The scope of the beans characterizes how many of their instances will be used by the application. It categorizes also the purpose of each bean as to why it is loaded to the Spring container. There are four scopes that can be associated with Spring beans but only two of them will be discussed in this chapter as part of the core platform.

...

Implementing a Spring container using XML


Let us begin with the creation of the Spring Web Project using the Maven plugin of our STS Eclipse 8.3. This web project will be implementing our first Spring 5.0 container using the XML-based technique. This is the most conventional but robust way of creating a Spring container.

The container is where the objects are created, managed, wired together with their dependencies, and monitored from their initialization up to their destruction. This recipe will mainly highlight how to create an XML-based Spring container.

Getting started

Create a Maven project ready for development using the STS Eclipse 8.3. Be sure you have installed the correct JRE. Let us name the project ch02-xml.

How to do it...

After creating the project, certain Maven errors will be encountered just like in Chapter 1, Getting Started with Spring. Bug-fix the Maven issues in our ch02-xml project in order to use the XML-based Spring 5.0 container by performing the following steps:

  1. Open...

Implementing a Spring container using JavaConfig


Another option for implementing the Spring 5.0 container is through the use of SpringJavaConfig. This is a technique that uses pure Java classes in configuring the framework's container. This solution eliminates the use of bulky and tedious XML metadata and also provides a type-safe and refactoring-free approach in configuring entities or collections of objects into the container. This recipe will showcase how to create the container using JavaConfig in a web.xml-less approach.

Getting started

Create another Maven project using the methodology in Chapter 1, Getting Started with Spring, and name the project ch02-xml. This STS Eclipse project will be using a Java class approach including its deployment descriptor.

How to do it...

Let us now apply the JavaConfig specification in building the Spring context definition:

  1. To get rid of the usual Maven bugs, immediately open the pom.xml of ch02-jc and add <properties>, <dependencies>, and ...

Managing beans in an XML-based container


Frameworks become a popular because of the principle behind the architecture they built from. Each framework is built from different design patterns that manage the creation and behavior of the objects they manage. This recipe will detail how Spring 5.0 manages objects of the applications and how it shares a set of methods and functions across the platform.

Getting started

The two Maven projects previously created will be utilized to illustrate how Spring 5.0 loads objects into the heap. We will also be utilizing the ApplicationContext rather than the BeanFactory container in preparation for the next recipes involving more Spring components.

How to do it...

With ch02-xml, let us demonstrate how Spring loads objects using the XML-based ApplicationContext container:

  1. Create a package org.packt.starter.ioc.model, where our model classes will be placed. Our model classes will be typical Plain Old Java Objects (POJO), for which the Spring 5.0 architecture is...

Managing beans in the JavaConfig container


The JavaConfig approach provides an easier, straightforward and programmatical way of loading beans to the container. This approach uses annotations and classes to manage the lifespan of the objects, the dependencies, and the injection of values and objects to setters and constructors. The next recipe showcases how to construct and utilize a Java-based ApplicationContext container.

Getting started

Let us create and use the ch02-jc project to create our first annotation-based ApplicationContext container. We will be using the same model classes presented in the recent recipe.

How to do it...

Let us create beans inside a JavaConfig's context definition class:

  1. Inside the ch02-jc\src\main\java directory, create a package: org.packt.starter.ioc.model. Implement the same Employee and Department model classes as in the previous recipe, Managing the beans in a XML-based container recipe. Open BeanConfig context definition class and inject these newly created...

Creating Singleton and Prototype beans


Creating beans to the containers is not enough for any project specification using the Spring framework. It is always necessary to determine the lifespan of the beans through bean scopes. The following recipe will determine how to optimize a container by creating Singleton and Prototypes beans.

Getting started

The scope of the beans characterizes how many of their instances will be used by the application. It categorizes also the purpose of each bean as to why it is loaded to the Spring container. There are four scopes that can be associated with Spring beans but only two of them will be discussed in this chapter as part of the core platform.

How to do it...

This recipe will be using both ch02-xml and the ch02-jc project in declaring which beans are considered Singleton and Prototype. We will explore and identify the effects of applying either of the two scopes to the container:

  1. Open the project ch02-xml and locate the XML definition file in the ch02-xml...

Defining eager and lazy spring beans


At this point, it is clear already how beans are instantiated inside Spring 5.0 containers. The practical definition of Inversion of Control and Dependency Injection design patterns has been established too. Two approaches to implementing a container have been illustrated with the previous recipes. This time we will provide a recipe on how to decide what form of instantiation the beans must undergo in a container.

Getting started

We need both ch02-xml and ch02-jc in this recipe since the bean loading strategy depends on what type of ApplicationContext container is being used. There are two bean loading strategies in the Spring 5.0 framework namely eager and lazy loading.

How to do it...

Let us illustrate the eager and lazy loading of beans in a context definition using these steps:

  1. In the case of the XML-based ApplicationContext, eager loading means all the beans in the definition will be loaded and initialized aggressively in the heap memory during start...

Creating an inner bean


When there are beans that can only be called once by some certain top-level beans, it will be easier to manage the ApplicationContext definition if we allow these objects to be inner beans. This recipe will show you how to create inner beans to some objects that exclusively use them.

Getting started

Both the ch02-xml and ch02-xml projects can be utilized separately on this recipe since each container creates inner beans differently.

How to do it...

Perform the following to create inner beans:

  1. In the ch02-xml, inject an Employee object, applying method injection for the actual values:
<bean id="empRec4" class="org.packt.starter.ioc.model.Employee"> 
  <property name="firstName" value="Gabriela"/> 
  <property name="lastName" value="Silang"/> 
  <property name="age" value="67"/> 
  <property name="birthdate" value="June 19, 1950"/> 
  <property name="position" value="writer"/> 
  <property name="salary" value="897000"/> 
</bean...
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Key benefits

  • Solve real-world problems using the latest features of the Spring framework like Reactive Streams and the Functional Web Framework.
  • Learn how to use dependency injection and aspect-oriented programming to write compartmentalized and testable code.
  • Understand when to choose between Spring MVC and Spring Web Reactive for your projects

Description

The Spring framework has been the go-to framework for Java developers for quite some time. It enhances modularity, provides more readable code, and enables the developer to focus on developing the application while the underlying framework takes care of transaction APIs, remote APIs, JMX APIs, and JMS APIs. The upcoming version of the Spring Framework has a lot to offer, above and beyond the platform upgrade to Java 9, and this book will show you all you need to know to overcome common to advanced problems you might face. Each recipe will showcase some old and new issues and solutions, right from configuring Spring 5.0 container to testing its components. Most importantly, the book will highlight concurrent processes, asynchronous MVC and reactive programming using Reactor Core APIs. Aside from the core components, this book will also include integration of third-party technologies that are mostly needed in building enterprise applications. By the end of the book, the reader will not only be well versed with the essential concepts of Spring, but will also have mastered its latest features in a solution-oriented manner.

Who is this book for?

Java developers who would like to gain in-depth knowledge of how to overcome problems that they face while developing great Spring applications. It will also cater to Spring enthusiasts, users and experts who need an arena for comparative analysis, new ideas and inquiries on some details regarding Spring 5.0 and its previous releases. A basic knowledge of Spring development is essential

What you will learn

  • • Understand how functional programming and concurrency in JDK 1.9 works, and how it will affect Spring 5.0
  • • Learn the importance and application of reactive programming in creating services, and also the process of creating asynchronous MVC applications
  • • Implement different Spring Data modules
  • • Integrate Spring Security to the container
  • • Create applications and deploy using Spring Boot
  • • Conceptualize the architecture behind Microservices and learn the details of its implementation
  • • Create different test cases for the components of Spring 5.0 components

Product Details

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Publication date : Sep 27, 2017
Length: 670 pages
Edition : 1st
Language : English
ISBN-13 : 9781787128316
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Product Details

Publication date : Sep 27, 2017
Length: 670 pages
Edition : 1st
Language : English
ISBN-13 : 9781787128316
Vendor :
Pivotal
Category :
Languages :
Tools :

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Table of Contents

13 Chapters
Getting Started with Spring Chevron down icon Chevron up icon
Learning Dependency Injection (DI) Chevron down icon Chevron up icon
Implementing MVC Design Patterns Chevron down icon Chevron up icon
Securing Spring MVC Applications Chevron down icon Chevron up icon
Cross-Cutting the MVC Chevron down icon Chevron up icon
Functional Programming Chevron down icon Chevron up icon
Reactive Programming Chevron down icon Chevron up icon
Reactive Web Applications Chevron down icon Chevron up icon
Spring Boot 2.0 Chevron down icon Chevron up icon
The Microservices Chevron down icon Chevron up icon
Batch and Message-Driven Processes Chevron down icon Chevron up icon
Other Spring 5 Features Chevron down icon Chevron up icon
Testing Spring 5 Components Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.5
(2 Ratings)
5 star 50%
4 star 0%
3 star 0%
2 star 50%
1 star 0%
Charles Baker Feb 23, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Excellent book, covering most new practices in Spring, very worth the $.
Amazon Verified review Amazon
OliverK Oct 31, 2017
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
Das Buch lebt vom Beispiel-Code, der ist schwarz-weiß gedruckt (kein Syntax-Highlighting) und durch viele ungeschickte Zeilenumbrüche oft nur mühsam zu erfassen. Der Code der zahlreichen Rezepte baut in weiten Teilen aufeinander auf; aus dem Code-Ausschnitt eines Rezepts ist das Gesamtbild nur schwer abzuleiten. Hier ist die Arbeit mit dem separat erhältlichen Code erforderlich, auf den im Buch an vielen Code-Stellen verwiesen wird. In den begleitenden Erklärungen der Rezepte finde ich überdurchschnittlich viele Fehler: fehlende/falsche Bilder und irrweisende Referenzen.All diese Aspekte sah ich in vielen anderen Werken qualitativ hochwertiger gelöst. Insgesamt bleibt bei mir ein unbefriedigender Eindruck zurück. Ich werde zu diesem Thema weitere Literatur kaufen (müssen) und werde diese von einem anderen Verlag wählen.
Amazon Verified review Amazon
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