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Mastering Grails: Grails and legacy databases
In this Mastering Grails installment, Scott Davis explores the various ways that Grails can use database tables that don't conform to the Grails naming standard. If you have Java? classes that already map to your legacy databases, Grails allows you to u
Introducing Apache Mahout
Once the exclusive domain of academics and corporations with large research budgets, intelligent applications that learn from data and user input are becoming more common. The need for machine-learning techniques like clustering, collaborative filtering, and categorization has never been greater, be it for finding commonalities among large groups of people or automatically tagging large volumes of Web content. The Apache Mahout project aims to make building intelligent applications easier and faster. Mahout co-founder Grant Ingersoll introduces the basic concepts of machine learning and then demonstrates how to use Mahout to cluster documents, make recommendations, and organize content.
Ganglia and Nagios, Part 2: Monitor enterprise clusters with Nagios
This is the second article in a two-part series that looks at a hands-on approach to monitoring a data center using the open source tools Ganglia and Nagios. In Part 2, learn how to install and configure Nagios, the popular open source computer system and network monitoring application software that watches hosts and services, alerting users when things go wrong. The article also shows you how to unite Nagios with Ganglia (from Part 1) and add two other features to Nagios for standard clusters, grids, and clouds to help with monitoring network switches and the resource manager.
Ganglia and Nagios, Part 1: Monitor enterprise clusters with Ganglia
This is the first article in a two-part series that looks at a hands-on approach to monitoring a data center using the open source tools Ganglia and Nagios. In Part 1, see how to install and configure Ganglia, the scalable, distributed monitoring system for high-performance clusters based on a hierarchical design. Also learn how to add more monitoring capability by writing Ganglia plug-ins and by enabling external-source spoofing.
Transaction strategies: Understanding transaction pitfalls
Transaction processing should achieve a high degree of data integrity and consistency. This article, the first in a series on developing an effective transaction strategy for the Java platform, introduces common transaction pitfalls that can prevent you f
The case for portlets
Some software designers always choose the latest technology to implement their solutions. Others tend to stick with more familiar, time-tested platforms. In this article, Stan and Ann Marie put their Web application and portlet development experience to w
Introduction to Web Services for Remote Portlets
Get an introduction to Web Services for Remote Portlets (WSRP), a specification which defines how to leverage SOAP-based Web services that generate mark-up fragments within a portal application. By defining a set of common interfaces, WSRP allows portals
Develop AJAX applications like the pros, Part 3: Use DWR, Java, and the Dojo Toolkit to integrate Java and JavaScript
Quick, how many Java? Web development frameworks, libraries, and toolkits can you name? The are so many out there that it can be overwhelming just trying to figure out what does what and which one can actually help you solve your problems. However, if you
Cloud computing with Amazon Web Services, Part 1: Introduction
Explore how cloud computing using Amazon Web Services provides a compelling alternative for designing and building scalable, reliable applications. Get introduced to the building blocks of this virtual infrastructure, and learn how you can use Amazon Web
Auto-save JSF forms with Ajax: Part 3
In the first article of this series, author and Java? developer Andrei Cioroianu showed how to submit the user input of a Web form with Asynchronous JavaScript + XML (Ajax) and how to handle the Ajax requests with JavaServer Faces (JSF). In the second art
Auto-save JSF forms with Ajax: Part 2
In the first part of this "Auto-save JSF forms with Ajax" series, author and Java? developer Andrei Cioroianu showed you how to build Java applications that automatically save Web forms, using Asynchronous JavaScript + XML (Ajax) and JavaServer Faces (JSF
Auto-save JSF forms with Ajax: Part 1
In this three-part series, author and Java? developer Andrei Cioroianu shows you how to automatically save form data in a Java Web application using Asynchronous JavaScript + XML (Ajax) and JavaServer Faces (JSF) technologies. You'll learn how to submit W
Java run-time monitoring, Part 1: Run-time performance and availability monitoring for Java systems
Run-time performance monitoring is critical to achieving and maintaining a well-performing system. In this article, the first in a three-part series, Nicholas Whitehead explains how to do low-level granular monitoring of Java? performance efficiently. The
Get ready for Firefox 3.0
Mozilla Firefox 3 is a major release with many enhancements, some of which are targeted at users, and some at developers. One of the most interesting updates gives Web developers the ability to build Web applications that work even when the user is discon
Lazy Linux: 10 essential tricks for admins
Learn these 10 tricks and you'll be the most powerful Linux? systems administrator in the universe...well, maybe not the universe, but you will need these tips to play in the big leagues. Learn about SSH tunnels, VNC, password recovery, console spying, an
Increase flexibility with the Service Integration Maturity Model (SIMM)
Increase flexibility in your Service-Oriented Architecture (SOA) when you apply the seven levels of maturity on the path to SOA adoption. Authors Ali Arsanjani and Kerrie Holley take you on a tour of the Service Integration Maturity Model (SIMM).
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