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Docker Swarm Tutorial

1. Introduction This post introduces Docker Swarm – the Docker Engine’s Swarm mode. The Swarm mode enables multiple machines running Docker Engines to collaborate in a cluster. Let us explore the basics of this. To follow the examples provided here you will need Docker Engine 1.12 or above to be installed in your machine. You will also need to install ...

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Apache Tomcat Rewrite Rules Example

The rewrite valve implements URL rewrite functionality in a way that is very similar to mod_rewrite from Apache HTTP Server. uses a rule-based rewriting engine, based on a PCRE regular-expression parser, to rewrite requested URLs. URL rewriting is a technique called URL rewriting that can turn unsightly URLs into nice ones. It enables you to fill out your URLs with ...

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How to Add a Space Admin Screen to Your Confluence Add-on

Have you read my past articles on Atlassian Confluence Add-on Development? Yes? Cool! Now that you have created an add-on, you might want to add a Space Admin Screen to your Confluence Add-on to add some configuration or behavior to it. Read on and together we will add a Space Admin Screen to your Confluence Add-on. 1. Gather the Tools ...

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Selenium Keyboard Events Example

1. Introduction In this tutorial we will be discussing about the Advance User Interactions API. Using these APIs, we can perform actions on a web page similar to a user would interact on the user using keyboard and mouse. The Actions interface and Action classes are two modules of the API that needs to be implemented to make use of ...

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Apache Hadoop Knox Tutorial

In this tutorial, we will learn about Apache Knox. Knox provides the REST API Gateway for the Apache Hadoop Ecosystem. We will go through the basics of Apache Knox in the following sections. 1. Introduction Apache Knox is the open source project under Apache Software Foundation similar to most other Hadoop Ecosystem projects. It provides a REST API Gateway for ...

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Jenkins Docker Image Example

1. Introduction In this post we will learn about how to install and configure Jenkins through the Jenkins Docker image. This is the official Docker image of Jenkins available from the Docker hub here. Please ensure that you have Docker engine and Docker-Compose installed to try out the examples provided in this post. 2. Install Jenkins Docker Image The official ...

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Apache Tomcat Mod_jk Tutorial

The Apache Tomcat connector allows to use the Apache httpd server as a front-end for Apache Tomcat applications. With this configuration you can get some features like Clustering, Load Balancing, and enhanced Security, provided by the httpd server. The mod_jk connector is an Apache HTTPD module that allows HTTPD to communicate with Apache Tomcat instances over the AJP protocol. The ...

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Hadoop Hbase Maven Example

In this article, we will learn about using Maven for including Hbase in your Apache Hadoop related applications and how Maven makes it easy to write the Java Hbase applications with the repositories. 1. Introduction Hbase is the NoSql database available in the Hadoop Ecosystem. Like rest of the Hadoop Ecosystem Hbase is also open-source and is used when the ...

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How to Intercept Confluence Content Before it’s Rendered

Daniel was a bored Atlassian Confluence Administrator. So he hatched up a prank on April fool’s day. He was going to intercept Confluence content before it’s rendered. He was going to intercept all Loremipsum macros and make it an unknown macro. Here’s how he did it. 1. Tools Daniel used the following tools: Atlassian SDK Mars Eclipse 2. Create the ...

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