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EJB Architecture Example

1. Introduction EJB stands for Enterprise Java Bean. An Enterprise Java Bean is in its basic form any POJO(Plain Old Java Object) that is registered with the container in which it is deployed. Enterprise Java Beans are deployed into an EJB container. The EJB container is governed by the EJB specification. At the time of writing this article, the latest version ...

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Spring JdbcBeanDefinitionReader Example

This article is about the Spring JdbcBeanDefinitionReader. When would you use this class? When you want to dynamically add externally defined bean definitions in Spring. The Spring JdbcBeanDefinitionReader is a bean definition reader that reads values from a database table and expects columns for bean name, property name and value as String. The formats for each are identical to the ...

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Spring Security Login Example

In this article we will learn how to use spring security to create a simple login page. You will need an IDE (I am using IDEA IntelliJ), JDK 1.8 or later, Maven 3.0+. 1. Introduction The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications – on any kind of deployment platform. A key element ...

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MongoDB Field Update Operators Tutorial

Hello readers, in this tutorial, we will understand the different Field Update Operators available in the Mongo database. Let’s study in brief the different ways in which these operators can be used. Table Of Contents 1. Introduction 1.1 What is MongoDB? 1.2 Why MongoDB? 2. MongoDB Field Update Operators Tutorial 2.1 $inc Operator 2.2 $rename Operator 2.3 $set Operator 2.4 ...

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JBoss Drools Spreadsheet Example

This example illustrates JBoss Drools Spreadsheet Example. Before proceeding with this article, we assume readers have a basic knowledge about how a Java n-tier application works. We also assume readers have good understanding of JBoss Drools. For more information on JBoss Drools please refer the article JBoss Drools Best Practices. 1. Introduction As we already know, Drools is a Rule Engine ...

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Spring Integration FTP Gateway Example

1. Introduction Spring Integration provides gateways and adapters as a means to connect to external endpoints. In his blog, Josh Long explained the difference between adapters and gateways as: An adapter receives messages from an external messaging system (JMS, e-mail, SFTP, whatever) and “adapts” it to the messaging system (as a Spring Integration Message). Once a message comes in, via ...

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Spring Querydsl Tutorial

Spring Data JPA and Querydsl enable developers to write type-safe queries. In this tutorial, we will build a Spring boot JPA application to demonstrate how to achieve it. Table Of Contents 1. Introduction 2. Technologies Used 3. Spring Boot JPA Maven Project 3.1 Dependency 3.2 Entity Classes 3.3 Generated Meta Model Classes 3.4 JpaRepositories 3.5 Services 3.6 Daos 3.7 Demo ...

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MongoDB Aggregation Example

Hello readers, aggregation in Mongo database is an operation that processes the multiple documents and returns a single computed result. In this tutorial, we will learn how to use the different aggregation operations in the Mongo database. 1. Introduction If you have installed the MongoDB application (version 3.6) on Windows or Ubuntu operating system and you wish to learn the ...

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Spring Batch JmsItemReader Example

This article is a tutorial about Spring Batch with JMSItemReader. We will use Spring Boot to speed our development process. 1. Introduction Spring Batch is a lightweight, scale-able and comprehensive batch framework to handle data at massive scale. Spring Batch builds upon the spring framework to provide intuitive and easy configuration for executing batch applications. Spring Batch provides reusable functions ...

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Android FloatingActionButton Example

1. Introduction The Floating Action Button is a special type of button primarily used for functionalities such as morphing, launching, and the transferring anchor point. Further, this type of button is often found on the floating surface of a user interface. The primary difference between the Floating Action Button and the other types buttons is that the Floating Action Button, like the name, ...

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