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.

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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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Inject Properties from Properties File using Spring Environment

We can load properties value from Properties file to Spring Environment just by using @PropertySource annotation. This tutorial shows you the simple way to get them from Environment object.

Related Articles:
Inject Properties from Properties File using @Value annotation
Inject Properties from Properties File using @ConfigurationProperties Annotation
How to use Spring Factory Method to create Spring Bean

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Inject Properties from Properties File using @ConfigurationProperties Annotation

This tutorial will show you the better way to handle properties using @ConfigurationProperties Annotation.

In previous article, we have learned about using @Value annotation to inject properties from properties file. This approach has disadvantage that if we wanna change any property, we have to update all files which referenced it.

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Spring XD Option Module – Batch Job with PostgreSQL Datasource

Spring XD Option Module is an approach to expose metadata of each module for configuration. The tutorial will guide you how to configure PostgreSQL Datasource with Spring XD Annotation: @ModuleOption.

Related articles:
Spring XD Stream – PostgreSQL JDBC Sink
Spring XD Batch Job – How to Start

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