Java 8 Streams

Java 8 comes with some prominent features like Lambda Expressions, Method References. And Streams are also an important concept that we should comprehend.

This tutorial will help you have a deep view of Java 8 Streams: what they are, ways to create them, how they work with intermediate operations, terminal operation…

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Spring MongoOperations to access MongoDB

MongoDB is an open-source NoSQL document database, written using C++. This tutorial will introduce way to use Spring Boot to access MongoDB and perform CRUD operations with Spring MongoOperations.

Related Articles:
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How to use SpringData MongoRepository to interact with MongDB
SpringData MongoDB GridFsTemplate to save, retrieve, delete binary files (Image, Text files)

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Spring ThreadPoolTaskExecutor with Callable interface for concurrency programming

Callable is a Java interface that is an useful methodology for control multi-threading returns on concurrency development.

The tutorial will guide you to build a concurrency program with ThreadPoolTaskExecutor of Spring Framework and Callable interface.

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Java 8 – Method References

Method References make it clear when referring to the existing method by name.

In the article Lambda Expressions and Functional Interfaces, we use lambda expressions to create anonymous methods and sometimes, calling an existing method is the only thing it does.

When using lambda expression without input arguments or those input arguments doesn’t make sense, we can use Method References to simplify the syntax.

This tutorial introduces four kinds of Method References and how to use them efficiently with some Functional Interfaces.

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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

Security is an important of a Web Application, So The tutorial will guide you how to configure Security for a Web Application with Spring Boot.

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Spring Security – Customize Login Handler
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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 – Factory Pattern

Factory Pattern is a kind of Creation Pattern. Factory Pattern provides an interface for integration and hidden the complex implementation of related components.

The tutorial will help you create a factory pattern based on concept above.

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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 Boot with Docker Container

Docker is a new revolution for Linux container and it is a powerful tool for MicroService development.
The tutorial will guild you how to build a Spring Boot application and deploy it with Docker container.

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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:
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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 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:
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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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