Ajax Patterns Code Now Available

All code for the Ajax Patterns demos is now available. This is the code used as examples for many of the patterns at AjaxPatterns.org, as well as the Pattern-Led Tutorial that forms Chapter 2 of the “Ajax Design Patterns” book to be published next month.

Download the code – ajaxdemos.zip.

Read the installation notes. Basically, you need PHP and Apache, and optionally MySQL is required for the wiki demos. The install should be pretty basic, as the notes indicate:

* Unzip the package to a temporary location and copy
  run/, tutorial/, and records/ to the apache document root.
  Assuming the doc root is /apache/document/root:

cp run tutorial records /apache/document/root.

(Alternatively, if you have sufficient access, set up a new virtual host in apache's httpd.conf and point it to the root of the unzipped directory, ajaxdemos/).

  • Ensure the server can write to (the initially empty) records/ directory. The easiest (though not the most secure) way is:

    chmod 777 apache/document/root/records

  • Open up run/.htaccess and follow instructions there to set the library path.

  • Finished!

You might wonder why the server-side uses PHP, when I’m more of a Java+Ruby kind of guy. Realistically, the choice was Java versus PHP due to popularity. PHP was chosen because the code needs to be easy to install, and LAMP is a lot more ubiquitous and easier to work with than integrating Java+Tomcat+MySQL together. I understand Java is at least shipping with Debian at some point, but right now, there’s few things easier than getting a LAMP setup running, especially with all the one-click installers around (http://www.apachefriends.org/en/xampp.html).

From a development perspective, I also found PHP more productive for the experimental style of development that went into the Ajax demos. The usual drivers for Java – maintainability, security, etc. – weren’t a factor. PHP also has the sort-of-merit of being the Switzerland of server-side languages. Use Perl, Java, C#, or Rails, and you’re going to be flamed loudly from some contingent. But use PHP and most non-PHP coders will say something about it would have been nice if you’d used Java/etc but I can see your point and shrug their shoulders a bit. As it happens, only a few patterns (need to) delve into server-side details, so the only real impact of using PHP is if people want to hack the code or look further into the details of implementing a pattern.

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