Blog

Page 326 of my articles, tutorials, and thoughts

Latest Articles

Cover Image for java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
spring

java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

Published on September 2, 2023

# ๐Ÿค” Oops! java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener Have you ever encountered this error message while working on a Java project? If so, don't worry, you're not alone! It can be quite frustrating when your pr

Cover Image for How do I make a list of data frames?
dataframelistrr-faq

How do I make a list of data frames?

Published on September 2, 2023

# How to Make a List of Data Frames ๐Ÿ“‹ So, you need to make a list of data frames and access each of those data frames from the list? No worries, I've got you covered! ๐Ÿ˜Ž ## The Problem ๐Ÿค” Let's start by understanding the problem. You have multiple data

Cover Image for Reading a List from properties file and load with Spring annotation @Value
javaspring

Reading a List from properties file and load with Spring annotation @Value

Published on September 2, 2023

# Reading a List from Properties File and Loading with Spring Annotation @Value So you want to have a list of values in a `.properties` file and load it directly into your class using Spring annotation `@Value`. You're wondering if there's a way to do thi

Cover Image for Why is Spring"s ApplicationContext.getBean considered bad?
javaspring

Why is Spring"s ApplicationContext.getBean considered bad?

Published on September 2, 2023

# Why is Spring's `ApplicationContext.getBean()` considered bad? ๐Ÿคจ So you're diving into the world of Spring, configuring beans left and right, and you stumble upon this answer on Stack Overflow claiming that calling `ApplicationContext.getBean()` is a b

Cover Image for Spring @Autowire on Properties vs Constructor
constructordependency-injectionspring

Spring @Autowire on Properties vs Constructor

Published on September 2, 2023

# Spring @Autowire on Properties vs Constructor: Which Approach Should You Choose? ๐Ÿงฉ So you've been using Spring and you've stumbled upon two different ways to achieve dependency injection: using the `@Autowired` annotation on properties or using it on t

Cover Image for Cannot find module "../build/Release/bson"] code: "MODULE_NOT_FOUND" } js-bson: Failed to load c++ bson extension, using pure JS version
angularjsjavascriptmongodbnode.jswindows

Cannot find module "../build/Release/bson"] code: "MODULE_NOT_FOUND" } js-bson: Failed to load c++ bson extension, using pure JS version

Published on September 2, 2023

๐Ÿ“๐ŸŒŸ๐Ÿ”ง Blog Post: Troubleshooting "Cannot find module '../build/Release/bson'] code: 'MODULE_NOT_FOUND'" Error Hey there! ๐Ÿ‘‹ Are you facing the frustrating error message "Cannot find module '../build/Release/bson'] code: 'MODULE_NOT_FOUND'" in your MongoD

Cover Image for Difference between Role and GrantedAuthority in Spring Security
javaspringspring-mvc

Difference between Role and GrantedAuthority in Spring Security

Published on September 2, 2023

๐ŸŒŸ Understanding the Difference between Role and GrantedAuthority in Spring Security ๐ŸŒŸ Are you feeling puzzled by the concepts of "Role" and "GrantedAuthority" in Spring Security? Don't worry, you're not alone! Many developers find it confusing and treat

Cover Image for Spring Boot configure and use two data sources
javaspringspring-mvc

Spring Boot configure and use two data sources

Published on September 2, 2023

๐Ÿ“ **Blog Post: Spring Boot - Configure and Use Two Data Sources** ๐Ÿ‘‹ Hey there tech enthusiasts! Today, let's dive into a common question: "How can I configure and use two data sources in Spring Boot?" If you're facing this challenge, worry not! We've go

Cover Image for Failed to configure a DataSource: "url" attribute is not specified and no embedded datasource could be configured
spring

Failed to configure a DataSource: "url" attribute is not specified and no embedded datasource could be configured

Published on September 2, 2023

## \[Troubleshooting Guide\] Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured So you're building a Spring Boot Batch application with MongoDB, and you've encountered the dreaded error messag

Cover Image for Type safety: Unchecked cast
javaspring

Type safety: Unchecked cast

Published on September 2, 2023

# Type safety: Unchecked cast - What's the Deal? ๐Ÿ˜ฎ So you're working on your Java project, feeling all confident and mighty, when suddenly you come across this pesky warning in Eclipse: **Type safety: Unchecked cast from Object to HashMap<String,String>