This post is about using Spring Shell to make a simple application for scanning open TCP ports. Technologies used: Spring Boot 2.0.5.RELEASE Spring Shell 2.0.1.RELEASE Quick Overview: Final Project Structure Creating a new base Spring Boot project Needs for parallelism How check whether a port is open? Integrating with Spring […]
This post is about creating PKCS #12 to serve e.g. your content via HTTPS in your application itself or in another web container (such a Tomcat or another application server). The PKCS #12 format is a binary format for storing cryptography objects. It usually contains the server certificate, any intermediate certificates (i.e. […]
This post is about installing an Ubuntu desktop on your Synology NAS. You are able to install any other Linux distribution using this recipe, it does not matter whether desktop or server type of any distro. To install any virtual machine to your Synology, you need to install Virtual Machine Manager to […]
In this example, we will secure a home page (/home) with Spring Security using Radius authentication. Technologies used: Spring Boot 1.5.9.RELEASE TinyRadius 1.0.1 Embedded Tomcat 8.5.23 Quick Overview: Create a new base Spring Boot project with required dependencies Create a simple login using Spring Security Create your own RadiusAuthenticationProvider Simple […]
This example will demonstrate how to use Spring Integration for downloading files from a remote SFTP server. Two possible authentications could be used, i.e. public key or password. Technologies used: Spring Boot 1.5.2.RELEASE Spring Integration 4.3.8.RELEASE (managed by Spring Boot) Spring 4.3.7.RELEASE (managed by Spring Boot) Quick overview: Create SFTP […]
This example will demonstrate how to use Spring Integration for uploading files to a remote SFTP server. You can use both of possible authentication methods, i.e. with a public key or with a password. The real example shows the public key authentication only because it is a more production-ready choice. […]
This post shows how to implement parallelism in Java using its native java.util.concurrent classes. I mean especially using parallel Fork-Join Framework (available since Java 1.7), which is most suitable for processing of high complex (CPU intensive) tasks. I mean that case when you have one very complex task and you […]
This post shows how to use a FilteredRowSet object. It lets you filter the number of rows that are visible in a RowSet object so that you can work with only the relevant data that you need. You may decide how you want to “filter” the data and apply that […]
This post shows how to make any device (running on Windows, MAC OS X, Linux-based systems) visible public (outside of your private or home network), without any public IPv4 address. I mean the state when you are stuck behind a NAT gateway or proxy and also your Internet Service Provider […]
This post shows how to create Maven’s dependency elements (used in pom.xml file) programmatically, using DSL (Domain-Specific Language). You may find it useful, when you need to convert e.g. an old Java project (with dozens of required dependency jar files in one folder) into Maven project, i.e. create a new […]
