Loma  Baumbach

Loma Baumbach

1596612840

Liquibase — Handling Database in Spring Boot

If you are building an application with Spring Boot, handling the database changes becomes a nightmare over time. The more changes you add, the more changes you have to maintain for your database. Liquibase is the best solution out there. In this post, we will show how to handle database changes using liquibase.

What is Liquibase?

Liquibase is an open-source library to track, manage, and apply database changes. Liquibase tracks the changes to database through an XML configuration where a developer will usually add changesets.

Each changeset will have an id and author attributes. Liquibase uses a changelog to track the database changes. Every changeset you add, that will get added in the changelog. Changelog is a ledger of all the changes you are doing to database.

How does Liquibase work?

To track database changes, you will write an XML file that is platform-independent. This XML file will be used on the command line to translate into scripts for your database engine.

We can also use a maven or Gradle plugin to include database changes in the build configuration.

Liquibase uses its own tables to track changes. Those tables will be part of the schema you are building for consistency purposes. It records the hash of each changeset.

How to write a changeset?

Previously, I mentioned you can write a changeset using XML. But liquibase also offers the support for JSON or YAML.

As part of this post, I will show how I add a changeset and generate scripts for the database.

Create an XML changelog file db.changelog-master.xml for our database under folder src\main\resources\db. Usually, if you start using liquibase from the start of the project, you will create an initial changelog file that will generate initial scripts. You can track every change after that through a change set.

#database #coding #software #software-development #software-engineering

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Buddha Community

Liquibase — Handling Database in Spring Boot
Were  Joyce

Were Joyce

1620751200

How to Configure the Interceptor With Spring Boot Application

In the video in this article, we take a closer look at how to configure the interceptor with the Spring Boot application! Let’s take a look!

#spring boot #spring boot tutorial #interceptor #interceptors #spring boot interceptor #spring boot tutorial for beginners

Were  Joyce

Were Joyce

1620720872

Spring vs Spring BooDifference Between Spring and Spring Boot

As an extension of the Spring Framework, Spring Boot is widely used to make development on Spring faster, more efficient and convenient. In this article, we will look at some of the parameters were using Spring Boot can drastically reduce the time and effort required in application development.

What is Spring?

Spring Boot

Difference between Spring and Spring Boot

Advantages of Spring Boot over Spring

Conclusion

#full stack development #spring #spring and spring boot #spring boot

Sigrid  Farrell

Sigrid Farrell

1622601303

How to Configure log4j2 In a Spring Boot Application? | Spring Boot Logging [Video]

Configuring log4j2 is really quick and simple; this tutorial video explains the entire process in only 5 minutes, while you wait for your coffee to brew.

In the video below, we take a closer look at the How to configure log4j2 in the Spring boot application using log4j2.xml? | Spring Boot logging. Let’s get started!

#java #spring boot #video #log4j #spring boot tutorial #spring boot tutorial for beginners

Were  Joyce

Were Joyce

1620844680

Spring Boot 2 With JSP View

In this tutorial, I am going to show you how easy it is to create a web application with Spring Boot 2, along with the embedded Tomcat + JSP template and JSP views.

What You’ll Need

1. Project Structure

You can get the blueprint from the Spring Initializer page.

2. Project Dependencies

3. Configuration

4. Controller and View Template

5. Run With Maven

#java #tutorial #spring boot #jsp #spring boot 2 #spring boot tutorial #jsp view

Ruth  Nabimanya

Ruth Nabimanya

1620633584

System Databases in SQL Server

Introduction

In SSMS, we many of may noticed System Databases under the Database Folder. But how many of us knows its purpose?. In this article lets discuss about the System Databases in SQL Server.

System Database

Fig. 1 System Databases

There are five system databases, these databases are created while installing SQL Server.

  • Master
  • Model
  • MSDB
  • Tempdb
  • Resource
Master
  • This database contains all the System level Information in SQL Server. The Information in form of Meta data.
  • Because of this master database, we are able to access the SQL Server (On premise SQL Server)
Model
  • This database is used as a template for new databases.
  • Whenever a new database is created, initially a copy of model database is what created as new database.
MSDB
  • This database is where a service called SQL Server Agent stores its data.
  • SQL server Agent is in charge of automation, which includes entities such as jobs, schedules, and alerts.
TempDB
  • The Tempdb is where SQL Server stores temporary data such as work tables, sort space, row versioning information and etc.
  • User can create their own version of temporary tables and those are stored in Tempdb.
  • But this database is destroyed and recreated every time when we restart the instance of SQL Server.
Resource
  • The resource database is a hidden, read only database that holds the definitions of all system objects.
  • When we query system object in a database, they appear to reside in the sys schema of the local database, but in actually their definitions reside in the resource db.

#sql server #master system database #model system database #msdb system database #sql server system databases #ssms #system database #system databases in sql server #tempdb system database