Java 8 – Functional Interfaces

Functional Interfaces is one of the new important things of Java 8. In previous article, we had a little view about common use cases of Lambda Expression including Runnable and ActionListener. They are example of Functional Interfaces.

This tutorial helps you have deeper concept of Functional Interface, then some interfaces which are provided in java.util.function package such as Predicate and Function.

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Spring Security – Config Security for Web MVC by Spring Boot

Configure Spring Security for Spring MVC web application + SpringBoot

In the tutorial, JavaSampleApproach will show you how to configure Security for SpringMVC web application.

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Java Design Pattern – Abstract Factory Pattern

Abstract factory pattern is a Super-Factory of a group familiar factories. We can use it to expose API for integration code and hidden the logic implementation. Abstract Factory gives us a way to manage and decouple design in case Program has more than one Factory having the same Interface.

The tutorial will guide you a sample for how to program with Abstract Factory Pattern.

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Java Design Pattern – Singleton Pattern

Singleton Pattern is a design pattern which you often meet in almost applications. Singleton Pattern provides a way to instantiate only one instance in an application context.

The tutorial introduces the design of Singleton Design Pattern and give many ways to create a Singleton Pattern in your application.

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Spring Batch Job with Parallel Steps

For scaling a Batch Job, Parallel Steps is one solution that bases on the business logic of application. We split the logic business in distinct responsibilities, and each step can be executed in parallelized flow. The tutorial will guide you how to configure parallel steps with Spring Batch.

Related Articles:
Spring Batch Partition for Scaling & Parallel Processing
How to start with Spring Batch using Spring Boot – Java Config

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Spring Profiles – @Profile Annotation and XML Configuration

In application development, sometimes we should make different configuration for each environment. Spring Profiles provides a way to separate application configuration into some parts and they are only available in one or more specific environments.

This tutorial introduces ways to use Spring Profiles by @Profile Annotation or XML Configuration.

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Spring Batch XML Config by Spring Boot

How to start Spring Batch XML Config – use Spring Boot

Many business operations need to process with batch job for critical environment. Spring Batch is a lightweight framework to boot the batch application.

For starting, you can follow the How to start with Spring Batch using Spring Boot – Java Config. In the tutorial I will guide you how to start with XML config.

Related Articles:
How to start with Spring Batch using Spring Boot – Java Config
How to use Intercepting Job Execution in Spring Batch
How to use Spring Batch Restartable Function
Spring Batch – Programmatic Flow Decision
How to import CSV data to PostgreSQL Database using Spring Batch Job

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Inject Properties using @Value Annotations vs Environment vs @ConfigurationProperties

@Value Annotations vs Environment vs @ConfigurationProperties.

Spring provides some ways to inject properties from properties file. We have learned how to use them in 3 articles:
@Value Annotation
Environment
@ConfigurationProperties

This tutorial helps you have a comparison view covering those solutions.

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