Production Ready Web Services with Dropwizard

Production Ready WebServices with Dropwizard Portland Java User Group May 15, 2012 Sean Sullivan

http://twitter.com/hipsterhacker/status/193559234259075074

• Gilt Groupe• Dropwizard project• Dropwizard at Gilt

Gilt Groupe

online retailer

May 2011

April 2012

What does Gilt sell?

Apparel

Kids toys and apparel

Home furnishings

Local deals

Travel

Gilt technology

Portland NYC Dublin

Service oriented architecture

email serviceproduct serviceshopping cart servicecheckout servicepayment service

internal “service framework” image credit: dealwithitportland.com

Dropwizard

“Dropwizard consists mostly of glue codeto automatically connect and conﬁgurethese components”• Jetty • logback• Jersey • Yammer Metrics• Jackson • Google Guava• JDBI • Hibernate Validator

Dropwizard modules• dropwizard-core • dropwizard-scala• dropwizard-client • dropwizard-views• dropwizard-db • dropwizard-testing• dropwizard-auth

<dependencies> <dependency> <groupId>com.yammer.dropwizard</groupId> <artifactId>dropwizard-core</artifactId> <version>0.4.0</version> </dependency> <dependency> <groupId>com.yammer.dropwizard</groupId> <artifactId>dropwizard-scala</artifactId> <version>0.4.0</version> </dependency></dependencies> Maven pom.xml

+ Java services extendcom.yammer.dropwizard.Service

+ Scala services extendcom.yammer.dropwizard.ScalaService

Service conﬁguration

YAML + conﬁg class

import com.yammer.dropwizard.config.Configuration;public class MyServiceConfiguration extends Configuration { // your config stuff}

Other config• com.yammer.dropwizard.config.HttpConfiguration• com.yammer.dropwizard.config.LoggingConfiguration• com.yammer.dropwizard.db.DatabaseConfiguration

Hello world

Compile and run$ git clone git://github.com/sullis/dropwizard-helloworld.git$ cd dropwizard-helloworld$ mvn clean package$ ./bin/dev.sh

http://localhost:8080/helloworld?name=Portland

Dropwizard at Gilt

gift certiﬁcate servicefraud service

Gift certiﬁcate demo

dropwizard-gilt• Jackson ObjectMapper conﬁguration• Log4j appender conﬁg• ZooKeeper registration• MessagingManager class

Hibernate Validator + Scala case classes https://groups.google.com/d/topic/dropwizard-user/sGEi3i8W1tY/discussion

https://twitter.com/#!/cowtowncoder/status/198167133887266816

SOA challenges• deployment• QA• monitoring• debugging

Questions?

THE END

Bonus slides

“Monitoring and QA are the same thing.Youd never think so untilyou try doing a big SOA. But when your service says "oh yes, Imﬁne", it may well be the case that the only thing still functioning inthe server is the little component that knows how to say "Imﬁne, roger roger, over and out" in a cheery droid voice. In order totell whether the service is actually responding, you have to makeindividual calls.The problem continues recursively until yourmonitoring is doing comprehensive semantics checking of yourentire range of services and data, at which point itsindistinguishable from automated QA” Steve Yegge, October 2011 http://bit.ly/pityk6

“If you have hundreds of services, and your code MUSTcommunicate with other groups code via these services, thenyou wont be able to find any of them without a service-discovery mechanism. And you cant have that without aservice registration mechanism, which itself is another service.So Amazon has a universal service registry where you can findout reflectively (programmatically) about every service, whatits APIs are, and also whether it is currently up, and where” Steve Yegge, October 2011 http://bit.ly/pityk6

Production Ready Web Services with Dropwizard

by sullis on May 16, 2012

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Production Ready Web Services with Dropwizard Presentation Transcript