High performance with spring 5 torrent download

You can consider a Spring bean as a simple Java object, instantiated, configured, and managed by a Spring IoC container. It is called a bean instead of an object or component because it is a replacement for complex and heavy enterprise JavaBeans with respect to the origin of the framework. For creating bean instances, we first need to instantiate a Spring IoC container by reading the configuration metadata.

After initialization of an IoC container, we can get the bean instances using the bean name or ID. The BeanFactory container acts as the simplest container providing basic support for DI, and it is defined by the org. BeanFactory interface. BeanFactory is responsible to source, configure, and assemble the dependencies between objects.

BeanFactory mainly acts as an object pool, where object creation and destruction is managed through configuration. The most popular and useful implementation of BeanFactory is the org. The content of Beans. It has a single bean configured, which has a single property with the name message. It has a default value set for the property.

The ApplicationContext container provides support to access application components using BeanFactory methods. This includes all functionality of BeanFactory. In addition, ApplicationContext can also perform more enterprise functionalities, like transaction, AOP, resolving text messages from properties files, and pushing application events to interested listeners.

It also has the ability to publish events to the registered listeners. Spring also provides us with a web-aware implementation of the ApplicationContext interface, as shown:. We can use either one of these implementations to load beans into a BeanFactory ; it depends upon our application configuration file locations. For example, if we want to load our configuration file Beans. If we want to load our configuration file Beans. This class looks for the configuration file Beans.

After loading the configuration files and getting an ApplicationContext , we can fetch beans from the Spring container by calling the getBean method of the ApplicationContext :.

In the following section, we will learn about the Spring bean life cycle, and how a Spring container reacts to the Spring bean to create and manage it. The factory method design pattern is used by the Spring ApplicationContext to create Spring beans in the container in the correct order, as per the given configuration.

So, the Spring container is responsible for managing the life cycle of the bean, from creation to destruction. In a normal Java application, a new keyword of Java is used to instantiate the bean, and it's ready to use.

Once the bean is no longer in use, it's eligible for garbage collection. But in a Spring container, the life cycle of the bean is more elaborate. The Spring Framework 5. In this time frame, one of the major developments has been the evolution of the Spring Boot project.

We will discuss the new features in Spring Boot 2. One of the biggest features of the Spring Framework 5. Core reactive programming features and support for reactive endpoints are available out of the box with the Spring Framework 5.

The list of important changes includes the following:. The entire Spring Framework 5. Basically, it means that to work on the Spring Framework 5.

The reactive programming model stands out among the most exciting feature of Spring 5. The Spring 5. The new event-loop execution model can scale vertically using few threads.

The framework procures reactive streams to provide a system for conveying backpressure in a pipeline of reactive components.

Backpressure is an idea that guarantees consumers do not get overpowered with data originating from different producers. While Java 8 does not have built-in support for reactive programming, there are a number of frameworks that provide support for reactive programming:.

As a part of the new features introduced in Java 8, the core of the Spring Framework 5. For the logging side, the Spring Framework 5. Also, this new version will be able to detect Log4j 2. It also supports Resource abstraction by providing the isFile indicator for the getFile method. Spring 5. It also provides support for the Servlet 4.

The new ParsingPathMatcher will act as an alternative to AntPathMatcher , with more efficient parsing and extended syntax. In spring-webflux , there are two major programming models on the server side:. Spring spring-webflux also provides support for creating WebClient , which is reactive and non-blocking, as an alternative to RestTemplate.

The modular framework is trending on the Java platform. From Java 9, the Java platform became modular, and that helps to remove the flaws in encapsulation. In OSGi, each module is denoted as a bundle. Each bundle has its own life cycle, with different states as installed, started, and stopped.

Its main purpose is to define and implement a modular structure for JDK and to define a module system for Java applications. Kotlin is basically an object-oriented language that runs on top of the JVM, and also supports functional programming style. With Kotlin support, we can dive into functional Spring programming, especially for functional web endpoints and bean registration.

In Spring Framework 5. With the Spring 5. There are some newly added Kotlin extensions that basically add function extensions to the existing Spring APIs. BeanFactory for searching a bean by just specifying the bean type as Kotlin's reified type parameter without class argument:. One more extension can be found in org. On the testing front, the Spring Framework 5. It helps in writing tests and extensions in JUnit 5. It also gives a test engine to run Jupiter-constructed tests with respect to Spring and also provides a programming and extension model.

For Spring WebFlux, spring-test likewise incorporates bolster for WebTestClient to integrate testing support f or the reactive programming model. There is no compelling reason to run a server for testing scenarios. In Spring 5. The mock. The BeanFactoryLocator is also not available along with the bean.

The NativeJdbcExtractor is also no longer available along with the jdbc. The packages web. I f you are utilizing any of the preceding bundles, i t is advised to remain on the Spring Framework 4. In this chapter, we gained a clear understanding of the core features of the Spring Framework. We also covered different kinds of Spring modules. After that, we went through different types of Spring projects in the Spring Framework. We also understood the mechanisms of a Spring IoC container. At the end of the chapter, we looked at the new features and enhancements introduced in Spring 5.

In the next chapter, we will understand the concept of DI in detail. We will also cover the different types of configurations using DI, including performance assessment.

And finally, we will go through the pitfalls of DI. Subhash Shah is an experienced solution architect. With 14 years of experience in software development, he works as an independent technical consultant now. He is an advocate of open source development and its utilization in solving critical business problems. He is an admirer of quality code and test-driven development TDD.

His technical skills include translating business requirements into scalable architecture and designing sustainable solutions. He has also been a technical reviewer for other books. Pritesh is responsible for integrating technologies with best practices to translate business requirements into business change. His expertise lies in, but is not limited to, designing, developing, deploying, and testing N-tier applications, and leading teams.

He is very good at debugging problems and finding the best solution. Pritesh believes in constant improvement by quickly adapting new technologies suitable for building solutions.

Prashant Goswami works as a Senior Consultant at KNOWARTH Technologies and handles enterprise projects with regard to software design, development, deployment, and building processes to provide customers with affordable software solutions. He is able to adapt quickly to any technology and has a keen desire for constant improvement. Prashant has proven experience in working with various technologies in web application development, design patterns, enterprise architectures, and open source technologies.

He is a software architect with over 10 years of professional experience in developing web-based applications using various software platforms. He has proven expertise in leading and delivering software projects with varying degrees of complexity in domains such as ERP, HR, healthcare, CRM, and manufacturing. He has a keen interest in requirement analysis, progressive design, high-quality code, microservices, and refactoring. Apply microservices patterns to build resilient and scalable distributed systems.

Learn and use the design patterns and best practices in Spring to solve common design problems and build user-friendly microservices. About this book While writing an application, performance is paramount. Publication date: June Publisher Packt. Pages ISBN Download code from GitHub.

Some of the following complexities were faced while using EJB: Forcing implementation of unnecessary interfaces and methods Making unit testing difficult, especially outside the EJB container Inconveniences in managing deployment descriptors Tedious exception handling At that time, Spring was introduced as an alternative technology especially made for EJB, because Spring provided a very simple, leaner, and lighter programming model compared with other existing Java technologies.

The important benefits of the Spring Framework are as follows: No need to reinvent the wheel Ease of unit testing Reduction in implementing code Inversion of control and API Consistency in transaction management Modular architecture Up to date with time Let's discuss each in detail. Unit testing has multiple benefits: Improving the productivity of programmers Detecting defects at earlier stages, thereby saving the cost of fixing them Preventing future defects by automating unit tests in applications that are running in continuous integration CI builds All application classes are simple POJO classes; Spring is not invasive.

Spring Boot also provides some of the following features out of the box, by taking an opinionated view of how applications have to be developed: Provides support for developing standalone Spring applications Embeds Tomcat, Jetty, or Undertow directly, with no need to deploy WAR files Allow us to externalize configuration to work in different environments with the same application code Simplifies Maven configuration by providing opinionated starter POMs Eliminates the need for code generation and the requirement for XML configuration Provides support for production features like metrics, health checks, and application monitoring We will look at Spring Boot in depth in Chapter 12 , Spring Boot Microservice Performance Tuning.

Important features of Spring Batch are as follows: The ability to process data in chunks The ability to start, stop and restart jobs, including the ability to restart, in the case of failed jobs, from the point where they failed The ability to retry steps or to skip steps on failure Web-based administration interface It is not an overstatement to say the world is moving to the cloud. Some of the common patterns implemented in Spring Cloud are as follows: Distributed configuration Service registration and discovery Circuit breakers Load balancing Intelligent routing Distributed messaging Global locks Authentication and authorization are the essential parts of enterprise applications, both web applications and web services.

The configuration metadata can be represented using the following methods: XML-based configuration Annotation-based configuration Java-based configuration We will learn these methods in more detail in Chapter 2 , Spring Best Practices and Bean Wiring Configurations. Logger; import org. BeanFactory; import org. The list of important changes includes the following: Baseline upgrades Reactive programming support Core features upgrades Spring Web MVC upgrades Spring's new functional web framework, WebFlux Modularity support Kotlin language support Improved testing support Dropped or deprecated features We will discuss these changes in detail in the following sections.

So, the code readability is improved using inferred generics, lambdas, and so on. It also has the stability in the code for conditional support for Java 8 features. It requires Servlet 3. The development and deployment process is fully compatible with JDK 9 as follows: Compatible with classpath and module path, with stable automatic module names The Spring Framework's build and test suite also pass on JDK 9, and by default, it can be run on JDK 8 The reactive programming model stands out among the most exciting feature of Spring 5.

While Java 8 does not have built-in support for reactive programming, there are a number of frameworks that provide support for reactive programming: Reactive Streams : Language-neutral attempt to define reactive APIs Reactor : Java implementation of Reactive Streams provided by the Spring Pivotal team Spring WebFlux : Enables the development of web applications based on reactive programming; provides a programming model similar to Spring MVC As a part of the new features introduced in Java 8, the core of the Spring Framework 5.

Provision of selective declaration support of Java 8 default methods in Spring Core interfaces. Supports Nullable and NotNull annotations to explicitly mark nullable arguments and return values. This eliminates the cause of NullPointerExceptions at runtime and enables us to deal with null values at compile time. In spring-webflux , there are two major programming models on the server side: Support for Controller annotation including other Spring MVC annotations Provision for functional style routing and handling with Java 8 Lambda Spring spring-webflux also provides support for creating WebClient , which is reactive and non-blocking, as an alternative to RestTemplate.

There are certain problems resulted to have modularity support, as explained here: Java platform size: Since the last couple of decades, there was no need to add modularity support in Java. But there are many new lightweight platforms available on the market, like the Internet of Things IoT , and Node. ClassLoader difficulty: When the Java ClassLoader searches for the classes, it will pick the class definition that is around itself, and immediately load the first class available. So, if there is the same class available in different JARs, then it is not possible for ClassLoader to specify the JAR from which the class is to be loaded.

He has proven expertise in leading and delivering software projects with varying degrees of complexity in domains such as ERP, HR, healthcare, CRM, and manufacturing.

He has a keen interest in requirement analysis, progressive design, high-quality code, microservices, and refactoring. Click here if you have any feedback or suggestions. Skip to content. Star Branches Tags. Could not load branches. Could not load tags. Latest commit. Git stats 12 commits. Failed to load latest commit information. View code. Techniques for scaling and optimizing Spring and Spring Boot applications What is this book about?

This book covers the following exciting features: Master the best programming practices and performance improvement with Bean Wiring Analyze the performance of various AOP implementations Explore database interaction with Spring to optimize design and configuration Solve Hibernate performance issues and traps Leverage multithreading and concurrent programming to improve application performance If you feel this book is for you, get your copy today!

Instructions and Navigations All of the code is organized into folders. For example, Chapter MIT License.

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