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Execute a Command in Multiple Directories on Linux 1. Introduction In this tutorial, we’ll explore a few Bash approaches to execute the same command in multiple directories. 2. A Closer Look First of all, let’s break down the goal into smaller steps: list the contents of the current folder filter… Continue Reading execute-command-directories
Linux Commands – Delete Files Older Than X 1. Overview We often need to tidy up files on our workstations or servers. Our applications may produce logs or temporary files. One common use case is to delete files that are above a certain age. In this tutorial, we’ll look at… Continue Reading delete-files-older-than
Copying in Linux with Visual Progress 1. Overview In this tutorial, we’ll learn how to display copy progress and speed on Linux. 2. Single File rsync is a file-copying tool that works for remote as well as local copies. It isn’t always installed by default, but it’s a popular tool… Continue Reading copy-command-with-progress
Linux Commands Comparison: curl vs wget 1. Overview We may wish to send HTTP requests without using a web browser or other interactive app. For this, Linux provides us with two commands: curl and wget. Both commands are quite helpful as they provide a mechanism for non-interactive download and upload… Continue Reading curl-wget
Adding a Path to the Linux PATH Variable 1. Overview In this quick tutorial, we’ll focus on how to add a path to the Unix PATH variable. 2. PATH Variable The PATH variable is an environment variable that contains an ordered list of paths that Unix will search for executables… Continue Reading path-variable
Guide to ParameterMessageInterpolator 1. Overview One of the features of Java JSR 380 is allowing expressions while interpolating the validation messages with parameters. When we use Hibernate Validator, there is a requirement that we need to add one of the uniform implementations of Java JSR 341 as a dependency to our… Continue Reading hibernate-parametermessageinterpolator
Testing a Spring Batch Job 1. Introduction Unlike other Spring-based applications, testing batch jobs comes with some specific challenges, mostly due to the asynchronous nature of how jobs are executed. In this tutorial, we’re going to explore the various alternatives for testing a Spring Batch job. 2. Required Dependencies We’re… Continue Reading spring-batch-testing-job
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Find the Smallest Missing Integer in an Array 1. Overview In this tutorial, we’ll see different algorithms allowing us to find the smallest missing positive integer in an array. First, we’ll go through the explanation of the problem. After that, we’ll see three different algorithms suiting our needs. Finally, we’ll… Continue Reading java-smallest-missing-integer-in-array
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Java Weekly, Issue 303 1. Spring and Java ===== >> Simple Event Driven Microservices with Spring Cloud Stream [spring.io] A good set of abstractions to help you eliminate boilerplate from your messaging code. https://vladmihalcea.com/sql-server-json-hibernate/ [phauer.com] ===== >> Spring MVC – HTTP message converter [vard-lokkur.blogspot.com] ===== >> Release of Open Liberty 19.0.0.9 Completes… Continue Reading java-weekly-303
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Reading HttpServletRequest Multiple Times in Spring 1. Introduction In this tutorial, we’ll learn how to read the body from the HttpServletRequest multiple times using Spring. HttpServletRequest is an interface which exposes getInputStream() method to read the body. By default, the data from this InputStream can be read only once. 2. Maven… Continue Reading spring-reading-httpservletrequest-multiple-times
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