At the Forge - Thinking about APIs
Facebook, the social networking site started by Mark Zuckerberg, has become an extremely popular application on the Web. Facebook users can connect with friends, join groups of like-minded individuals and send messages to others. Early in 2007, Facebook became popular among developers, as well as users, for creating a developer API that goes far beyond the APIs I have described above. In a nutshell, Facebook invited developers to create and deploy new applications that are seamlessly integrated into the full Facebook experience.
Facebook isn't the only site that lets you incorporate your own code into the site. However, the style and methods of this integration are deeper on Facebook than I have seen elsewhere. In the Facebook model, your Web application still resides on your server, but its output is displayed inside the user's Facebook page, alongside other Facebook applications. This definitely is something new and exciting; I can't think of any other Web sites that make it possible for an independent developer to distribute code that integrates into the Web site. The fact that you can use whatever language and platform you prefer, communicating with Facebook in a certain way, marks the beginning of a new kind of API, one in which users can affect the Web service as seen by all users, not just one particular user. The only other site I can think of in this camp is Ning, Marc Andreessen's build-your-own-social-network site.
Moreover, Facebook has taken a page from Amazon and eBay, telling developers that they can go wild, using the Facebook network for commercial as well as nonprofit reasons. Google has had a long-standing policy of allowing access to its maps, for example, but only for publicly accessible Web sites and reasons. It remains to be seen whether Facebook's API will continue to be free of charge and open to all.
Something this sophisticated cannot use any one of the protocols that I mentioned above. Rather, Facebook uses a combination of protocols and techniques to communicate with your Web application, making it possible for your programs to display their output alongside other Facebook applications. Moreover, Facebook makes it possible for your application to grab certain pieces of the user's Facebook data, so even though your application doesn't have access to the back-end Facebook database, it still can know (and display) something about the user's friends. Your application even can send messages and notifications to the user's friends, although Facebook has discovered that this can lead to spamming, so it remains to be seen exactly what happens on this front.
Web sites used to be nothing more than an electronic method for publishing and reading basic information encoded in HTML. But, Web sites evolved into applications, which spawned the first generation of APIs that made it possible to read and write your data. Facebook is the first of the new generation of Web sites that look at themselves as a platform more than an application.
And, although Amazon, Google and eBay have demonstrated the importance and potential of a platform-centric view, Facebook is pioneering the incorporation of third-party applications. True, most Facebook applications created to date are simple or trivial. But, we can expect that these applications will become increasingly sophisticated and useful over time. Facebook's willingness to open up to third-party developers is good for everyone—except for competing sites, such as MySpace and LinkedIn, which still appear to see themselves as standalone sites, rather than platforms for new applications.
This month, I explained why I find Facebook's API to be new and exciting. Next month, we'll look at how you can create your own Facebook applications. Even if you aren't interested in creating applications for Facebook, you owe it to yourself to see how the latest generation of Web applications allow themselves to be modified, not just queried.
Reuven M. Lerner, a longtime Web/database developer and consultant, is a PhD candidate in learning sciences at Northwestern University, studying on-line learning communities. He recently returned (with his wife and three children) to their home in Modi'in, Israel, after four years in the Chicago area.
Practical Task Scheduling Deployment
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
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- Stunnel Security for Oracle
- The Firebird Project's Firebird Relational Database
- My +1 Sword of Productivity
- Managing Linux Using Puppet
- SUSE LLC's SUSE Manager
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Non-Linux FOSS: Caffeine!
- Google's SwiftShader Released
- Doing for User Space What We Did for Kernel Space
- Parsing an RSS News Feed with a Bash Script
With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide