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Source: developerWorks : Open source : Technical library NoSQL datastores like Bigtable and CouchDB are moving from margin to center in the Web 2.0 era because they solve the problem of scalability, and they solve it on a massive scale. Google and Facebook are just two of the big names that have bought in to NoSQL, and we're in early days yet. Schemaless datastores are fundamentally different from traditional relational databases, but leveraging them is easier than you might think, especially if you start with a domain model, rather than a relational one.
Source: developerWorks : Open source : Technical library One of Linux's strengths is its cross-platform nature: you can run it on
x86, x86-64, SPARC, PowerPC, and many other central processing units (CPUs).
This wealth of hardware choices poses a challenge for software developers,
though. Ensuring that software compiles, and runs correctly, on all platforms
can be difficult. The use of the QEMU package can help ease this burden. QEMU
is a machine emulator that supports a wide range of CPUs, so you can run
PowerPC software on an x86 computer, x86-64 software on an SPARC computer, or
what have you. This facility is particularly useful for programmers who need
to test software's endianness compatibility or check other CPU-specific
features. QEMU also enables you to run different operating systems entirely,
so that you can test a program's ability to compile and run under FreeBSD,
Solaris, or even Microsoft Windows without shutting down Linux.
Source: developerWorks : Open source : Technical library Meet OpenLaszlo, an open source platform, released under the Common
Public License (CPL), for the development and delivery of rich Internet
applications (RIAs). OpenLaszlo is based on LZX, which is an object-oriented
language utilizing XML and JavaScript. Rich-client applications written with
OpenLaszlo run across browsers and across platforms. In this article, we
look at the architecture and APIs of OpenLaszlo with several examples. We
also cover the basic debugging tools.
Source: developerWorks : Open source : Technical library Are you an experienced PHP developer who needs to learn Python? This
article approaches the world of Python development from a PHP developer's
perspective, translating familiar PHP concepts, such as variables, lists, and
functions, into their Python equivalents.
Source: developerWorks : Open source : Technical library Google Base allows users to store any type of content online in Google's
version of a massive online database. Web application developers are able to
access and search this content through the Google Base Data API. This article
introduces the Google Base Data API and demonstrates it in the context of a PHP
application, explaining how to use SimpleXML and the Zend_Gdata module to search, retrieve, add, and edit different types of data on Google Base.
Source: developerWorks : Open source : Technical library As mobile platforms become increasingly sophisticated, the
demand for mobile computing will increase. In this "Introduction
to the eSWT mobile extension series, learn about the embedded Standard Widget Toolkit
(eSWT). You can use eSWT to develop native-looking Java applications for a
variety of mobile phones. In this article, learn how to use more of the mobile
controls: MultiPageDialog, QueryDialog, TimedMessageBox, MobileDevice, Screen,
and Input.
Source: developerWorks : Open source : Technical library Hardware management using the Common Information Model standard often
means that the management application must be capable of listening to and handling
the indications that occur at the hardware level.
To test the indication listener component of the
management application when the planned system hardware is not
available during development, you will need dummy indications.
This article explains how
to generate dummy indications on OpenPegasus CIMOM (Common Information Model
Object Manager) using a provider shipped with the OpenPegasus source
code.
Source: developerWorks : Open source : Technical library Data mining is a collective term for dozens of techniques to glean
information from data and turn it into meaningful trends and rules to improve
your understanding of the data. In this second article of the series, we'll
discuss two common data mining methods -- classification and clustering -- which
can be used to do more powerful analysis on your data.
Source: developerWorks : Open source : Technical library This series explores the major types of cloud services and related
software you can use to build Web-scale systems. In this article, learn
about AppScale and Platform-as-a-Service (PaaS)
cloud computing. Explore the features and architecture of
this virtual infrastructure. It's a great way to test your
Google App Engine applications on your local resources or virtualized cloud
infrastructures, such as Amazon EC2 or Eucalyptus.
Source: developerWorks : Open source : Technical library Check out Global Innovation Outlooks' first-of-a-kind roundtable
in Second Life, diving into conducting a collaborative, open innovation
meeting in Second Life. The author also discusses tools to use for brainstorming and best
practices to consider during planning.
Source: developerWorks : Open source : Technical library Understand the tradeoffs in content currency as you practice including links to content, copies of content, or both.
Investigate techniques that will infuse new content into a solution information center after you deliver it to its audience.
For example, you can provide a link that launches a search of another web site's contents to find the latest documents,
You can include RSS feeds that deliver updated content to keep your solution information center fresh.
Source: developerWorks : Open source : Technical library Get introduced to Apache Click, a Java Platform, Enterprise
Edition (Java EE) Web application framework that enables the creation of Web
applications without using Model-View-Controller (MVC) patterns or JavaServer
Pages (JSP). This article provides examples of displaying a simple Web page
and creating a Web form that submits data that is displayed on a different Web
page.
Source: developerWorks : Open source : Technical library With the increasing interest in Ruby on Rails from companies in the
enterprise world, some observers have posed questions about its suitability
when it comes to the demanding requirements in this arena. One issue that some
have called attention to is that ActiveRecord, Rails' Object-Relational Mapper
(ORM), doesn't use prepared statements--or at least it didn't until now. With
the latest release of DB2 on Rails, parameterized queries are automatically
available and bring with them important performance and security benefits to
Rails applications.
Source: developerWorks : Open source : Technical library SugarCRM is the world's leading open source Customer Relationship Management
(CRM) software provider, with over 5,000 customers and 500,000 downloads of the
SugarCRM application all around the world. SugarCRM has long had a very useful Web
Services framework, allowing applications to access the SugarCRM instance and work
with data on it. But new to SugarCRM 5.2 is a framework for accessing other
outside Web services from inside the application itself. SugarCRM 5.2 ships with a
LinkedIn connector by default that uses this framework. Thus, users of the
SugarCRM instance can check on the LinkedIn status of various companies, contacts,
and leads they might have. In this article, learn how the connectors framework
works in Sugar 5.2 by building an example connector that allows users to see any recent Google News items pertaining to companies in their SugarCRM instance.
Source: developerWorks : Open source : Technical library Learn how Perl programmers can use three of the CPAN S3 modules --
Net::Amazon::S3, Amazon::S3, and SOAP::Amazon::S3 -- to list, create, and
delete "buckets" (S3 data storage); to list, create, retrieve, and delete
items in a bucket; and to get an item's metadata.
Source: developerWorks : Open source : Technical library OpenID is a decentralized authentication protocol that makes it easier for users to access resources in your Java Web applications. In this first half of a two-part article, you'll learn about the OpenID Authentication Specification and walk through the steps of incorporating it into a sample Java application. Rather than implement the OpenID Authentication specification by hand, author J. Steven Perry uses the openid4java library and a popular OpenID provider, myOpenID, to create a safe and reliable registration process for a Java application written in Wicket.
Source: developerWorks : Open source : Technical library Map-based mashups abound these days. Mashups require services
that can be mashed up. Location-based mashups need services that
provide boundary information. With Web-based mapping providers, you can
easily create a map-based mashup with little or no capital investment. In
this article, learn how to create a KML boundary
service from an ESRI shapefile to be used in mashups.
Source: developerWorks : Open source : Technical library Master techniques for collecting and customizing reusable content for a solution information center that describes your IT project. Learn fast paths for capturing many documents at once for instant reuse.
Source: developerWorks : Open source : Technical library The days of cowboy coding are long gone at most organizations, replaced
by a renewed interest in generating quality software. Continuous integration
(CI) testing is a vital component in the practice of agile programming
techniques that lead to high-quality software. Learn the theory and practice
of CI testing by exploring Buildbot, an open source CI system written in
Python.
Source: developerWorks : Open source : Technical library Recap and deliver your IT project experience for the benefit of clients, colleagues, and your own records.
Quickly and productively document the solution you've implemented. Aggregate, organize, and share presentations, demos, product documentation, feeds, code samples, and other information you've created or reused for delivery in an Eclipse-based information center.
Source: developerWorks : XML : Technical library Systems optimization is a growing field, especially in adaptive, autonomic systems, but also in traditional information workflows. Much of the material accumulated in the monitor phase is available in some form of XML. Rather than apply complicated, monolithic analysis tools, you can benefit when you apply the pattern dispatch mechanisms inherent in XML. This saves effort and increases flexibility as it supports a library of analysis primitives that you can redeploy for high-level reports as well as fine-tuning. Learn to apply the likes of XPath and XSLT patterns much more broadly in order to support analysis and drive systems optimizations.
Source: developerWorks : Open source : Technical library Part of the appeal of mobile applications is that you can take your application and its data with you wherever you go. One reality of mobile is, at times, a mobile device does not have a working connection to the Internet. This might seem to be an insurmountable problem for mobile Web applications. However, Web applications have evolved and become capable of working offline. In this article, you will learn how to offline-enable your mobile Web application and learn to detect when your application goes from offline to online and vice versa.
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