PHPNW 2010 - Developing Easily Deployable PHP Applications
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Transcript of PHPNW 2010 - Developing Easily Deployable PHP Applications
Developing Easily Deployable PHP Applications
John Mertic - SugarCRM
http://joind.in/2059
@2010 SugarCRM Inc. All rights reserved.
Why deployable apps still matter
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@2010 SugarCRM Inc. All rights reserved.
What I’ll cover
Writing portable codeEnabling configuration and customizationStrategies for testing and QAMaking your code perform well
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Writing portable code
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Source: http://www.flickr.com/photos/25339258@N05/2389910825/
Define your support matrix
Operating SystemAny Linux, UNIX, OS XWindows
Web ServerApache 1.3, 2.0, 2.2IIS 6/7 using FastCGI
DatabaseMySQL 5.0, 5.1SQL Server 2005, 2008Oracle 9i, 10g
PHP
5.2.x, 5.3.xSupport most common configurations options
mbstring.func_overload error_reporting = E_ALL
Require only the most mainline extensions, plus
Mbstrings ( i18n support )Imap ( mail support )Specific database extension ( mysql, mysqli, oci8, mssql, sqlsrv )
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Design code that works for these platforms
DB abstraction layer or ORMMake sure PHP features you are using are supported across support matrixAssume very little about the underlying system
Example: Treat file system as case-sensitive, and file writes are only in one area.
Detect what features the server has for you to use, have API to talk to them
Example: User cache ( APC, Memcache, Wincache, etc )
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Build and deploy!
We build all 3 editions of SugarCRM from 1 codebase
We add code tags around sections specific to a certain version.To test under each different edition, developers can run the build locally
We also can tag in or out features on a per edition basis.
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Enabling configuration and customization
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Making it simple yet powerful for end users
Expose configuration options thru multiple channels
Remember, not everyone has source access
Allow users to customize their UI interface easilyMake what should be simple, simple
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Making it simple yet powerful for developers
Create a safe place to make customizations
Avoid painful upgradesCreate an easy to use API
Well defined and supported.Don’t break it!
Create easy to use hooks for modifying / adding functionality
Examples from SugarCRM include:Metadata driven viewsLogic Hooks
Allow for internationalization and localization
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Strategies for testing and QA
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Source: http://www.flickr.com/photos/cglock/386033158/
Testing different configurations
Impossible for us to test every single permutation, so we use VM stacks instead
Windows Vista IIS-7 (FastCGI) PHP 5.2.8 MSSQL-2005 (PHP mssql driver) Windows Server 2003 IIS-6 (FastCGI) PHP 5.2.11 MSSQL-2005 (PHP mssql driver) CentOS 5 Apache-2.2.11 PHP 5.2.9 MySQL-5.1.33 Windows Server 2008 IIS-7 (FastCGI) PHP 5.3.1 MSSQL-2008 (Microsoft sqlsrv driver 1.1) Windows XP Apache-1.3.41 PHP 5.2.13 MySQL-5.0.83Oracle Enterprise Linux 5.1 Apache-2.0.63 PHP 5.3.2 ORCL-10g
We test both new installations and upgrade scenarios; even customer instances!
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Automated Testing Tools
Hudson (http://hudson-ci.org/) – Extensible CI ServerRunning on every checkin
PHP lint ( php –l ) – Syntax checking for PHP source filesPHPUnit (http://www.phpunit.de/) – Unit testing framework
Runs once a daySODA – functional testing framework that leverages Watir
– SodaMachine – GUI tool for building SODA testsJMeter (http://jakarta.apache.org/jmeter/) - tool for testing a website under high load
– MeterMaid – XML language to write JMeter tests in▪ SugarMMM (MeterMaid Maker) - utility to automate
writing MeterMaid tests for SugarCRM– TidBit – tool to make huge datasets for testing
All runs are against all flavors and all supported platform stacks
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Making your code perform well
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Source: http://www.flickr.com/photos/tech1987/501427718/
What we do to help performance
Try to do the basic stuffAvoid writing slow codeCaching, and lots of itCombine, minify, and version JS / CSS / imagesKeep SQL queries as simple as possible
Leave the rest to the Sys AdminProvide configuration options to turn off heavy featuresEnable the application to take advantage of it’s environment
Example: Using APC, memcache, Zend_Cache, wincache with little to no configuration
Provide best practices for various environments
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How we gauge performance
Formal testingUse Jmeter (http://jakarta.apache.org/jmeter/) on a load test cluster to test raw response speed.Instance analysis
Monitor web server logs to look for non-cached itemsTrack slow queries
Ad-hoc testingProfile PHP execution with XDebugUse Firebug to measure CSS / JS / image payload
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What are the lessons we have learned?
Define what you will support and to what extentWrite your code to be flexible to any environmentMake customizing, configuring, and extending your application not painful for users or developersTest across your support matrix, using automation as much as possibleFocus more on best practices and general performance, let admins handle it from there.
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Source: http://www.flickr.com/photos/dlanod/126386070/
About me and my company
John Mertichttp://jmertic.wordpress.comTwitter: @[email protected] ( Work )[email protected] ( PHP )Slides available on slideshare http://slidesha.re/9LX3Jp
SugarCRMhttp://www.sugarcrm.comWe’re hiring!Learn more about SugarCRM’s open source tools at http://developers.sugarcrm.com/opensource
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Buy my book!
Questions?
Please give feedback at http://joind.in/2059
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