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Hibernate CascadeType.PERSIST Example

Greeting readers, in this tutorial, we will create two entity classes related to each other and we will perform the cascading operations between them. 1. Introduction Object-Relational Mapping or ORM is the programming technique to map application domain model objects to the relational database tables Hibernate is a Java-based ORM tool that provides the framework for mapping application domain objects ...

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Java Prototype Design Pattern Example

1. Introduction to Java Prototype Design Pattern In this article, we would be discussing in depth the Java Prototype Design pattern. Java Prototype Design pattern is a creational design pattern that provides a way of prototyping objects of similar nature. In Java, the creation of objects is an expensive job in terms of the processing power being consumed. In case ...

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Java 8 Format LocalDateTime Example

1. Introduction Java 8 Date-time API provides a java.time.LocalDateTime class which is an immutable date-time object and often is viewed as a year-month-day-hour-minute-second format. It contains a java.time.format package to handle the formatting of dates and times. This package includes three classes: DateTimeFormatter – to print and parse date-time objects. It provides common formatting constants as well as a string ...

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Java Abstract Factory Design Pattern Example

1. Introduction In this article, we will depict Java Abstract Factory Design Pattern in detail. The Abstract configuration design, as its name proposes, is by all accounts an abstract class based method to allow creation of object factories with a template class that guides the development. Abstract Factory design pattern is specifically useful to build a class that explains how ...

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Hibernate CascadeType.REMOVE Example

Greeting readers, in this tutorial, we will create two entity classes related to each other and will perform the cascading operations between them. 1. Introduction Object-Relational Mapping or ORM is the programming technique to map application domain model objects to the relational database tables Hibernate is a Java-based ORM tool that provides the framework for mapping application domain objects to ...

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Java 8 Compare Dates Example

1. Introduction Java 8 added a new set of packages to provide a comprehensive date-time model. Java 8 Date-Time API is a JSR-310 implementation.                   There are several interfaces: ChronoLocalDate, ChronoLocalDateTime, ChronoZonedDateTime in java.time.chrono packages. They all have isBefore, isAfter, isEquals, and compareTo methods to compare two dates. Java 8 date classes: ...

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Hibernate Optimistic Locking Example

In hibernate, Locking represents a mechanism to safeguard the records that can be simultaneously accessed to avoid the concurrency errors (i.e. when multiple users simultaneously update the records resulting in inconsistencies). Hibernate has two types of locking mechanisms i.e. Optimistic locking Pessimistic locking In this tutorial, we will explore the optimistic locking mechanism in the hibernate framework. 1. Introduction Object-Relational ...

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Hibernate Calling Stored Procedure Example

Stored Procedures are a set of compiled SQL statements residing in the database. In hibernate; there are three different approaches to call a stored procedure i.e. Query interface – createSQLQuery(. . . .); StoredProcedureQuery interface – createStoredProcedureQuery(. . . .); @NamedNativeQuery annotation In this tutorial, we will explore how to create a simple stored procedure in the MySQL database and ...

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Selenium Docker Example

This article is about using Selenium grid to automate testing efforts. This covers using selenium inside a Docker container to speed up the testing setup and easier administration. 1. Introduction 1.1 Selenium Grid Selenium is used to automate browsers. Selenium WebDriver has found its place in test automation for web applications. It is used to create robust, browser-based regression automation ...

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Hibernate DateTime Mapping Example

In hibernate; @Temporal annotation is used to store java.sql.Time, java.sql.Date or java.sql.Timestamp in the database. In this tutorial, we will explore how to work with Timestamp using the xml and annotation configurations in the Hibernate framework. 1. Introduction Object-Relational Mapping or ORM is the programming technique to map application domain model objects to the relational database tables Hibernate is a ...

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