This post demonstrates how to install Docker in Red Hat Enterprise Linux in AWS EC2.
Install Jenkins in Red Hat Enterprise Linux and AWS EC2
This post demonstrates how to install Jenkins in Red Hat Enterprise Linux in AWS EC2.
Install Oracle Java 8 in Red Hat Enterprise Linux and AWS EC2
This post demonstrates how to install Java (JDK) 8 in Red Hat Enterprise Linux in AWS EC2.
Spring – Configurable Default Value for @Value
This post demonstrates how to use @Value that has both a configurable default value and a hard-coded final fallback value.
ExecutorService, AutoCloseable, and Try-With-Resources In Java
This post demonstrates how to use Java ExecutorService and AutoCloseable with try-with-resources. With ExecutorService, we need to call the shutdown method all the time. However, call the shutdown method means we are writing more codes than we should. There has
Provision a Server (EC2) on AWS
This post demonstrates how to provision a service (EC2) on AWS.
Send test emails with Amazon Simple Notification Service
This post shows how to configure a Topic and manually send test emails using Amazon Simple Notification Service from the AWS Console.
Validate Properties Files At Startup in Spring Boot
A .properties file contains lines of string pair. Each string pair consists of a parameter name (called the key), and parameter value. This post is about how to validate the parameter value at the application startup.
Trim String Values From Properties Files in Spring Boot
This post demonstrates how to trim string values from .properties files using SpringApplicationBuilder and a subclass of or anonymous class of StandardEnvironment supplied to the builder with overridden getProperty(String) and getProperty(String, String) methods.
Spring Boot – Access Spring ApplicationContext in JUnit Tests
This post shows how to access the Spring ApplicationContext object in JUnit tests. Now, why would we want to do that? Well, sometimes, we need to work directly with the ApplicationContext object. Spring, Java, and Other Requirements We used the