Incremental deployment of new features

Incremental deployment of new features Sean Sullivan Portland Java User Group January 17, 2012

• Gilt Groupe• International Shipping project• Incremental deployment

Gilt Groupe

online retailer

venture backed company

May 2011

What does Gilt sell?

Apparel

Home furnishings

Local deals

Travel

Gilt HQ

Gilt Portland

International Shipping

November 2011

Project goals• allow Gilt’s customers to ship merchandise worldwide• display price information in customer’s preferred currency• accept payment in customer’s preferred currency

Project goals• legal compliance• fraud prevention• streamlined user experience

Technical scope• Checkout UI • Warehouse• Data model • Finance• Order processing • Reporting• Payment processing • Web analytics• Email • Third party integration

Checkout UICheckout 1.0 Checkout 2.0• Ruby on Rails • Java + JSP• Domestic checkout • Domestic checkout only • International checkout • Clear separation between UI logic and business logic

International Checkout

Project roadmap

1. Write code2. Deploy to production3. Proﬁt!

Deploy to production?

We need adeployment strategy!

Deploy early, deploy often?

Velocity conference June 2009

Dark launch?

Facebook Engineering July 2009

Feature ﬂags?

Flickr engineering December 2009

Ramp up gradually?

Facebook Engineering May 2008

Dog food?

wikipedia.org

joelonsoftware.com

Gilt deployment strategy

1. dev team builds feature using “feature ﬂags”2. QA testing3. deploy new feature to production

4. make feature available to a subset of Gilt employees5. make feature available to all Gilt employees

6. make feature available to a subset of customers7. gradually ramp up to all customers 100%

User partitions

Partition 1 Partition 2 Partition 3 ... Partition 1000

Intelligent routing

Checkout 1.0Zeus Checkout 2.0

Detecting featureavailability at runtime

Java APIimport com.mycorp.FeatureService;if (featureService.isFeatureEnabled(appRequest, INTERNATIONAL_SHIPPING)) { // do something}else { // do something else}

Custom JSP tag<%@ taglib uri="/WEB-INF/mycorp.tld" preﬁx="mycorp" %><%@ taglib uri="http://java.sun.com/jsp/jstl/core" preﬁx="c" %><c:choose><c:when test=”${mycorp.isFeatureEnabled(‘internationalShipping’, pageContext)}”> International Shipping!</c:when><c:otherwise> <img src=”nyan-cat.jpg”/></c:otherwise></c:choose>

Questions?

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Incremental deployment of new features

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