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Source: developerWorks : Open source : Technical library Apache CXF shares certain underlying components with both Apache Axis2 and Metro but combines the components within an entirely different architecture. Dennis Sosnoski continues his Java Web services column series by comparing how the CXF, Metro, and Axis2 stacks perform both with and without WS-Security.
Source: developerWorks : Open source : Technical library Data mining is the talk of the tech industry, as companies are
generating millions of data points about their users and looking for a way to
turn that information into increased revenue. Data mining is a collective
term for dozens of techniques to glean information from data and turn it into
something meaningful. This article will introduce you to open source
data-mining software and some of the most common techniques to interpret
data.
Source: developerWorks : Open source : Technical library Rich Internet Applications (RIAs) often utilize different bundled technologies. Choosing the right grouping
of technologies can expedite development times and provide users a complete and rich
Internet experience. Discover how to use Java EE platform components on the server side,
the Adobe Flex platform on the client side, and the MySQL database server for storage
persistence.
Source: developerWorks : Open source : Technical library As multimedia becomes more prevalent, it becomes important to be able to
size video for the end-use, just as we've become accustomed to do with
graphics. Fortunately, an open source tool, WinFF, makes such conversions easy
and even fun to do. See four video-conversion examples: Flash, Windows
Media Player, QuickTime and BlackBerry.
Source: developerWorks : Linux : Technical library This article -- the first in a series on Hadoop -- explores the
Hadoop framework, including its fundamental elements, such as the Hadoop file system
(HDFS), and
node types that are commonly used. Learn how to install and configure a single-node Hadoop
cluster, and delve into the MapReduce application. Finally, discover ways to monitor and
manage Hadoop using its core Web interfaces.
Source: developerWorks : Open source : Technical library Smarty is a PHP template engine that lets you separate the business
logic from the presentation in your Web applications. Smarty currently has no
built-in Asynchronous JavaScript and XML (Ajax) support, but its plug-in architecture lets you extend it easily
and use it together with JavaScript frameworks, such as jQuery. This series
describes how to use Smarty in Ajax applications, how to create
Smarty plug-ins, and how to improve the code quality of your Web applications,
making the code more readable and easier to maintain.
Source: developerWorks : Open source : Technical library So you've got to cut costs, but you're not a manager. You're a
software developer, or a power user, or just someone who needs to keep the
bottom line healthy enough to support your salary. These are ideal situations
for introducing open source software solutions into your environment. That
might sound like you'll spend the next three weeks learning to program or
write makefiles, but it's just not so. Read on and see how open source is a
flexible, usable approach to efficiency in your work
environment.
Source: developerWorks : Open source : Technical library Portals provide information from diverse sources in a unified way. When portlets are integrated into a portal, the
functions delivered as part of each portlet should be available all of the
time. Unit testing can ensure that the features of your portlets will work
all the time, and everywhere. It is important to unit test portlets before
they are hosted publicly, and testing with
frameworks will speed up the testing process. In this article, learn about
portletUnit, a
JUnit testing framework for testing JSR-168 portlets. portletUnit uses a mock
container for testing, thereby reducing
the cost of investment in huge portal server environments. With the portletUnit framework
you can run unit tests
on any machine--without a portal server.
Source: developerWorks : Open source : Technical library Mobile devices play an ever-increasing role in our lives today. We use
them to communicate. We use them to navigate. We even use them as a handy
flashlight. While custom applications are extremely popular for the
iPhone and the Android platforms, there is an opportunity in mobile Web
applications. This article is the first in a two-part "Android and iPhone browser wars" series on developing
browser-based applications for iPhone and Android. Along the
way, we will build a simple network monitoring application that runs within the
confines of the desktop and both mobile browsers.
Source: developerWorks : Open source : Technical library To conduct software reviews and inspections smoothly, you need a set of
tools that includes techniques for reading phases, roles, and software tools.
Most people think review and inspection must be manual, with little room for
tools and automation. However, there are software tools to make reviews and
inspections more efficient, structured, and at least semi-automated. This
article introduces a toolset for code reviews that includes the techniques and
software tools that you need.
Source: developerWorks : Open source : Technical library Have you ever wished that Cookies were a lot bigger so you could store
more data on the client, or that you could make cross-domain Asynchronous
JavaScript and XML (Ajax) calls? If
so, you are in luck. Both of these techniques can be accomplished using
invisible Flash. So, just what is invisible Flash? It is not really invisible,
however, it is 1 pixel by 1 pixel, which makes it pretty hard to see. And, it can
be used as a way to tap into the capabilities of the Flash Player. In
this article, you will learn how to build invisible Flash files that let you to store up to 100 KB of client-side data and make cross-domain Ajax calls
-- all without your users ever knowing that Flash is being used.
Source: developerWorks : Open source : Technical library The e4 project is the next generation of Eclipse. e4 will provide a platform for pervasive
component-based applications and tools. In this article, learn about
some of the new features in e4, such as XWT and declarative styling.
XWT is a new toolkit for defining the structure of SWT/JFace
applications declaratively in XML, while
leaving the business logic in Java code. It can separate the model and
representation while saving much of the layout and UI related code originally
developed for your SWT/JFace application.
An example application walks you through the XWT interface and data binding
feature.
Source: developerWorks : Open source : Technical library PHP developers commonly require the services of an Extensible Markup Language (XML) parser in their code. Along these lines, they frequently find it necessary to validate XML input. Fortunately, you can easily accomplish this in PHP. This article shows you how to validate XML documents within PHP and determine the cause of validation failures.
Source: developerWorks : Open source : Technical library The pureXML capabilities of IBM DB2 allow you to store XML natively in a database without modification, while Adobe Flex applications can read XML directly and populate Flex user interfaces. In this three-part article series, you will create a microblogging application that takes advantage of pureXML, Web services, and Adobe Flex; and even allows you to publish your microblogging updates on Twitter.
Source: developerWorks : Open source : Technical library Learn how to create, develop, and test
a Cross-Platform Component Object Model (XPCOM) component that can be used by
the Firefox browser as an extension of an
application. Sample code provided with the example used in the article gives
you a quick start for developing your component for Firefox.
Source: developerWorks : Open source : Technical library Spring Web Flow 2's JPA/Hibernate persistence architecture is founded on the
concept of flow-managed persistence, which before now has been only briefly documented. In this in-depth article, Xinyu Liu walks you through the conceptual building blocks of flow-managed persistence and the flow-scoped persistence context. He then demonstrates transactional strategies for handling atomic and non-atomic Web flows in complex, real-world development scenarios.
Source: developerWorks : Open source : Technical library Create an adaptive cluster where nodes are dynamically provisioned with the
execution environment the jobs require by combining the xCAT cloud-management
tool with the TORQUE workload and resource-management system, and a provisioning
agent.
Source: developerWorks : Open source : Technical library Conflicting requirements, such as those related to security, performance, and economy, multiply
the challenge of integration developments typical in programming in the oil-and-gas industry.
One technique that can help ease the burden on slimmed-down
development teams is to centralize database accesses through the
open source SQL Relay product.
Source: developerWorks : Open source : Technical library Use inotify when you need efficient, fine-grained, asynchronous
monitoring of Linux file system events. Use it for user-space monitoring for
security, performance, or other purposes.
Source: developerWorks : Open source : Technical library EJB V3.0 provides a robust toolset for data persistence in Java. Using
EJBs doesn't have to be hard. See how you can access these features in an
eclipse environment and have stronger integration of your applications with
the data that is available to them. Trial versions of WebSphere application
server and DB2 database were used for the examples, but the techniques
discussed are transferable to the Community editions of WebSphere application
server and DB2 database.
Source: developerWorks : Open source : Technical library The Zend Framework contains several classes that make using cloud-based
services easy. Part 1 of this "Cloud computing with PHP" series looks at using
Zend classes with Amazon's S3 cloud storage service. Part 2 covers the Zend
classes that make it easy to work with virtual machines in Amazon's Elastic
Compute Cloud (EC2). This article focuses on the Zend classes for working with
Amazon's Simple Queue Service (SQS).
Source: developerWorks : Open source : Technical library The Apache CXF Web services stack supports WS-Security, including using WS-SecurityPolicy to configure the security handling. CXF is flexible in how you configure the deployment parameters used at run time to implement the security handling, supporting both static and dynamic configuration options for the client side. In this article, Java Web services series author Dennis Sosnoski shows how to use CXF for both a simple UsernameToken WS-Security example and one using signing and encryption.
Source: developerWorks : Open source : Technical library Author Thomas Myer shows experienced PHP developers how to add CouchDB to
their technical toolboxes.
Source: developerWorks : Open source : Technical library This is the first of a two-part series which will introduce you to cmislib, a
client-side library for working with CMIS content libraries. Content Management Interoperability Services (CMIS) is a specification that provides a standard way to access content, regardless of the underlying repository implementation or the choice of the front-end programming language. In this article, learn about the cmislib API for Python using examples.
Source: developerWorks : Open source : Technical library The World Wide Web Consortium (W3C) "Widget Packaging and
Configuration" specification is currently in candidate
recommendation status. The widgets, which can be used to provide rich Web application
elements for mobile devices and Web sites, are an emerging technology to be used with Hypertext Markup Language (HTML).
They are packaged as compressed (.zip)
files and can be deployed in HTML files with a Multipurpose Internet Mail Extensions (MIME) type of
application or widget. This article dives deeper into the specification, exploring how Web
application developers can use it and what the benefits are.
Source: developerWorks : Web development : Technical library Writing applications for
multiple operating systems and a wide range of mobile devices can be
challenging. The high demand for sophisticated mobile applications requires
significant hardware. One solution is to provide Web
applications, because they can run cross-platform on mobile devices. You
don't need to use proprietary technology (such as Objective-C with
Cocoa on the iPhone); you can use common Web technology. In
essence, just one version of the application is needed. The main hardware power
is provided by servers. In this article, explore the use of Web development in
the mobile
application space with a simple example that taps into the HTML5 standard.
Source: developerWorks : Open source : Technical library A lot of scientific data is freely available on the Internet. Combine
that with open source tools to efficiently process the data, and anyone can
experiment and explore and share their results with the rest of the community.
See one approach to community-driven science by connecting PHP to Scilab.
Source: developerWorks : Open source : Technical library Learn how to use OpenID to secure Java Web application resources from unauthenticated users. In this second half of his introduction to the OpenID Authentication specification, Steve Perry shows you how to use the openid4java library to create an OpenID Provider in a single sign-on application scenario. By establishing one application as an OpenID Provider in a "closed loop" architecture, you can enable end users to sign in just once to access multiple applications. You'll also learn how to use the OpenID Attribute Exchange (AX) extension for custom data exchange between OpenID relying parties and providers.
Source: developerWorks : Open source : Technical library Agavi is an open-source, flexible, and scalable framework for application development. One of its key features is built-in support for REST routes, making it possible to quickly add a REST API for third-party development to an existing or new Web application. In this article, examine this feature in detail, and how to build a REST API with support for both XML and JSON formats.
Source: developerWorks : Open source : Technical library Cloud computing is no longer a technology on the
cusp of breaking out, but a valuable and important technology that is
fundamentally changing the way we use and develop applications. As you
would expect, Linux and open source provide the foundation for the cloud (for
both public and private infrastructures). Explore the anatomy of the cloud,
its architecture, and the open source technologies used to build these dynamic
and scalable computing and storage platforms.
Source: developerWorks : Open source : Technical library Google Wave is here. And whether you plan to use, integrate with or
compete against it, you're going to need to have some understanding of what it
does. This article provides you with the basics, from building a simple
gadget to the high points of gadget construction.
Source: developerWorks : Open source : Technical library The complexity facing embedded systems architects today is daunting because of added requirements in safety, reliability, and network accessibility. Yet, the tools typically used are often a step behind large-scale software spaces and do not provide the ability to transition smoothly between the detailed device level and a total system view. Learn how to use open source standards such as DITA and PHP and tools such as blob representations to create a system-level environment to address these needs.
Source: developerWorks : Open source : Technical library See how to spice up your Eclipse-based applications using the same
technologies available to web developers, such as Dojo, Adobe Flex, and
OpenLaszlo. Furthermore, you can position your application to easily move
from a desktop application to a browser-based application, providing multiple
options for deployment.
Source: developerWorks : Open source : Technical library The OSGi framework is becoming increasingly popular. It provides great mechanisms for developing modular and dynamic applications.
The recent OSGi Service Platform Release 4 V4.2 specifications
introduced the Blueprint Container specification. In this article, learn
how the Blueprint Container provides a simple programming model for creating
dynamic applications in the OSGi environment. Numerous examples help get you started with the Blueprint XML file
and the component XML definitions.
Source: developerWorks : Open source : Technical library Ideally, the diverse services that medical patients need should interconnect and
interoperate to enhance healthcare quality and efficiency. This article, the first of
two parts, discusses the aggregation of healthcare services using Java Business
Integration (JBI) architecture. Such an aggregation platform -- a Healthcare Service Bus (HSB) -- can be readily adapted to other industries.
Source: developerWorks : Web development : Technical library Web services are a great way to expose functionality in a language- and
platform-independent manner. Asynchronous JavaScript and XML (Ajax) is a
technical means to access the contents of another resource without invoking a
new request on the current Web page. Using the two together, Web developers
can create powerful applications that leverage state-of-the-art technologies
and provide an enhanced user experience.
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