Continuous Improvement in PHP Projects - PHP UK Conference 2011

© 2011 Mayflower GmbH

Thorsten Rinne I 25th February 2011, London, UK

Continuous Improvement in PHP Projects

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Team LeadScrum MasterHead of Open Source Labs

@ThorstenRinne2

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Who are you?

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Continuous Integration?

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Continuous Inspection?

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Continuous Delivery?

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Why do we need Continuous Improvement?

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http://www.flickr.com/photos/nataliaromay/3217596831/

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Look at this real life example...

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1966: This was not a goal.9

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2010: This was a goal.10

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We are developers.

We are not perfect.

We‘re not politicians.

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„Continuous Improvement is better than delayed perfection.“

Mark Twain

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What exactly isContinuous Improvement?

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„A continuous improvment process is an ongoing effort to improve products, services or processes. These efforts seek incremental improvment over

time or breakthrough improvement all at once.“

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Continuous Improvement~

KAIZEN

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KAI=

Change

ZEN=

Good

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Attention!

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Your Management needs a will for changes!

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You need 3 steps for Continuous Improvement.

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1Continuous Improvement in PHP Projects I Mayflower GmbH I 25th February I

What are we trying to accomplish?

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2Continuous Improvement in PHP Projects I Mayflower GmbH I 25th February I

How will we know that a change is an improvement?

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3Continuous Improvement in PHP Projects I Mayflower GmbH I 25th February I

What changes will result in improvements?

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Plan

Act Check

Do

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PLAN:How should it be?

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Plan

Act Check

Do

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DO:What and how do we do it?

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Plan

Act Check

Do

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CHECK:What did we achieve?

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Plan

Act Check

Do

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ACT:What else do we have to do?

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Plan

Act Check

Do

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So, how to integrate Continuous Improvement

in your daily work?

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It‘s

!

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SCRUM

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SCRUM

CancelGift wrap

Return

Sprint2 weeks

Return

Sprint goal

Sprint backlog

Potentially shippableproduct increment

Productbacklog

CS fixesGift wrapCS fixes

Cancel

24 hours

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Extreme Programming

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Agile methods are about working in iteratons.

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Conclusion:Combine agile methods!

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Scrum + XP + Continuous Improvement

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EPIC WIN

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Common problemsin PHP projects

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Code Aging44

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Technical Debt

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We can do things quick and dirty.

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The dirty way leads to technical debt.

This can kill a software.

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Now: The slide for your management.

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Benefits per change request

Costs per change request

rising frequency

DEAD END!

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So please pay back your technical debt!

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Always refactor your codebase!

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PHP Tool Support

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You need a continuous integration server.

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Even if you don‘t do unittests.

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But don‘t tell that Sebastian!

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Jenkins CI Server

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Template for Jenkins Jobs for PHP Projects

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http://jenkins-php.org

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$ pear channel-discover pear.pdepend.org$ pear channel-discover pear.phpmd.org$ pear channel-discover pear.phpunit.de$ pear channel-discover components.ez.no$ pear channel-discover pear.symfony-project.com

$ pear install pdepend/PHP_Depend$ pear install phpmd/PHP_PMD$ pear install phpunit/phpcpd$ pear install phpunit/phploc$ pear install PHPDocumentor$ pear install PHP_CodeSniffer$ pear install --alldeps phpunit/PHP_CodeBrowser$ pear install --alldeps phpunit/PHPUnit

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PHP_CodeSniffer

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Why do we need PHPMD?

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How does PHPMD work?

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<?phpprint "Hello, world!";?>

PHP_Depends scans your code

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How does PHPMD work?

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PHPMD scans the report ...

<?xml version="1.0" encoding="UTF-8"?><PDepend> <Packages> <Package name="PHP_CodeBrowser"> <Stats> <TotalClasses>10</TotalClasses> <ConcreteClasses>9</ConcreteClasses> ...</PDepend>

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How does PHPMD work?

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<?xml version="1.0" encoding="UTF-8" ?><pmd version="0.2.7" timestamp="2010-10-28T16:27:21+02:00"> <file name="/Users/thorsten/htdocs/PHP_CodeBrowser/src/CLIController.php"> <violation beginline="201" endline="275" rule="CyclomaticComplexity" ruleset="Code Size Rules" package="PHP_CodeBrowser" externalInfoUrl="http://phpmd.org/rules/codesize.html#cyclomaticcomplexity" class="CbCLIController" method="run" priority="3"> The method run() has a Cyclomatic Complexity of 10. </violation>

...</pmd>

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PHP_CodeBrowser

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What is PHP_CodeBrowser?

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I a code browser :-)

I syntax highlighting for PHP files

I colored error sections found by PHP QA tools like•PHPUnit

•phpcpd

•PHP_CodeSniffer•Code Coverage

•PHPMD

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How to get PHP_CodeBrowser?

I Git repository:

http://github.com/mayflowergmbh/PHP_CodeBrowser

I PHPUnit PEAR channel:

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$ pear channel-discover pear.phpunit.de$ pear install --alldeps phpunit/PHP_CodeBrowser

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PHP_CodeBrowserpresentation

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Cinder

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Why do we need Cinder?

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I Integrate feedback directly

•static code analysis

•coding style

•unittests results

I Decrease number of tools

I Based on existing artifacts from Continuous Integration

I Conform with IDE usabiliy guidelines

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Cinder Features

I Eclipse plugin

•Eclipse can be used for many languages

•Well documentated plugin infrastructure

I Reads Hudson or phpUnderControl XML data

I Aggregates findings by the CI system

I Language of the project doesn‘t matter

I Periodic updates of input data

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How does Cinder work?

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DeveloperPC withEclipse

Continuous Integration

Server

periodically request from Cinder plugin

XML CI data from CI server

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How to install Cinder?

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How to install Cinder?

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How to install Cinder?

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How to install Cinder?

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Cinderpresentation

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How to get these tools?

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phpmd.orggithub.com/mayflowergmbh

phpunit.deopensource.mayflower.de

jenkins-php.org

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How to use that tools?

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Set up a continuous integration server!

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Use the artifacts of the PHP QA Tools!

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Take some time for refactoring in every sprint.

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Questions?

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Gràcies!Thank you very much for your attention!

© 2011 Mayflower GmbH

Contact Thorsten Rinnethorsten.rinne@mayflower.de+49 89 242054-31

Mayflower GmbHMannhardtstr. 680538 MünchenGermany