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Configuring DNS in Docker

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1. Introduction This post introduces Docker Engine’s network feature in general and specifically introduces configuring DNS in containers. This post assumes that you have the Docker Engine installed and that you know the basics of working with containers. We will not discuss service discovery from other networks here since that needs a deeper knowledge of Docker tools like Docker Swarm. ...

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Install Apache Tomcat on Mac os x Yosemite

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OS X Yosemite (version 10.10) is the eleventh major release of macOS, Apple Inc.’s desktop and server operating system for Macintosh computers. Apache Tomcat is a web server and servlet container that is used to serve Java applications. A servlet is a Java technology-based Web component, managed by a container, that generates dynamic content. 1. The tools OS X Yosemite ...

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How to Start Developing Layered Web Applications with Spring

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Spring is a great framework to develop enterprise Java web applications. It really eases life of Java developers by providing tons of features. In this example, we will show you how to start developing layered web applications with Spring. Table Of Contents 1. Create a new Maven WebApp project 2. Add necessary dependencies in your project 3. Create log4j.xml 4. ...

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Apache Tomcat Load Balancing Tutorial

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Load balancing improves the distribution of workloads across multiple Tomcat servers. Load balancing aims to optimize resource use, maximize throughput, minimize response time, and avoid overload of any single resource. Table Of Contents 1. The tools 2. Introduction 3. Prerequisites 4. Download Tomcat 5. Download Apache httpd server 6. Download mod_jk 7. Tomcat Installation 7.1 Uncompress Apache Tomcat 7.2 Install ...

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Docker as a Service

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In the previous posts we learned about Docker, containers, and working with containers, In this post we will learn about Containers as a Service (CaaS) in general and how Docker realizes CaaS. 1. Why Docker as a Service? Take a typical developer work-flow involving Docker. It will be typically as below. This is based on the reference workflow provided in ...

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JDBC Servlet Example

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In this example, we will see how to make use of JDBC from a servlet to access database and read data from table. We will use MySQL as the database and MySQL Workbench as the client for database to prepare the data. However this example does not cover installation of MySQL and MySQL Workbench. We will be using Eclipse as ...

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Using Selenium with Maven and Apache POI

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In this example, we are going to see how can we fetch the data from Excel sheet using Apache POI and use those data to search on google.com using Selenium WebDriver. We will be also using Maven to configure dependencies for Selenium and Apache POI. 1. Introduction Selenium is a browser automation tool. It consists of Selenium-IDE, Selenium Web Driver and ...

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Apache Tomcat Kerberos Authentication Tutorial

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Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography. A free implementation of this protocol is available from the Massachusetts Institute of Technology. Kerberos is available in many commercial products as well. 1. The tools Java JDK Apache Tomcat 2. Introduction Kerberos authentication is used to make Tomcat Web ...

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Lombok Utility and Scrapbook an eclipse feature

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Today we are going to see couple of utility features which could ease coding and help you save some time. They have handy features and I would recommend to have a look and try it. Let’s start a utility called Lombok which is an open source and helps to make code clean and reduce the boiler plate code. It’s very easy ...

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