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by Tim Berglund
Want to go deep on a popular NoSQL database? Cassandra is a scalable, highly available, column-oriented data store in use at Facebook, Twitter, Reddit, Rackspace, and other web-scale operations. It offers a compelling combination of a rich data model, a robust deployment track record, and a sound architecture. Get to know NoSQL better by studying this leading solution.
In this session, we'll talk about Cassandra's data model, work through its API in Java and Groovy, talk about how to deploy it, and look at use cases in which it is an appropriate data storage solution. We'll study its origins in the Amazon Dynamo project and Google's BigTable, and learn how its architecture helps us achieve the gold standard of scalability: horizontal scalability on commodity hardware. You'll leave prepared to begin experimenting with Cassandra immediately and planning its adoption in your next project.
If you never goofed around with assembler or machine code Java bytecode can seem an obscure piece of low-level magic. But sometimes things go really wrong and understanding that bit may be what stands between you and solving the problem at hand. Looking to deepen you Java programming skills? Understanding bytecodes is necessary to solve performance issues, some classloading issues and to generate code at runtime. And some things you can do are just plain freakin' cool. This talk will introduce you the JVM and bytecode basics using live coding examples. It's my hope that you'll walk out armed for the next battle with low-level issues. From the basics, to more advanced gotchas: * How to obtain the bytecode listings * How to read the bytecode * How the language constructs are mirrored by the compiler: local variables, method calls, optimizations, autoboxing, exception handling, etc * insight to some bytecode manipulation libraries (ASM, Javassist)
Tegnsettenkoding er noe du finner i alle lag av enhver applikasjon. Har du strenger, så har du enkoding. Hvis du ikke har kontroll på enkoding vil du ofte ende opp med rare tegn på websiden, databasen vil ikke sortere norske tegn rett, og du ender av og til opp med filer med en god blanding av enkodinger som føles umulig å nøste opp i uten å fikse alle de rare tegnene manuelt.
Etter denne lyntalen skal du ha en god forståelse av tegnsettenkoding, slik at du ikke må strø "charset=utf-8" tilsynelatende tilfeldig utover kodebasen din i håp om å få rett sluttresultat.
by Bodil Stokke
Manifestet for smidig programvareutvikling sitt første prinsipp sier at; det å levere programvare av verdi kontinuerlig, er vår høyeste prioritet. Dette er ofte lettere sagt enn gjort, fordi det forutsetter masse hard jobbing med å komme frem til en infrastruktur og en prosess som støtter en rask flyt fra idé til produksjon.
Jeg vil gi et innblikk i hvordan teamet som utvikler Digipost gradvis har utviklet evnen til å kontinuerlig levere programvare av høy kvalitet til produksjon når vi vil, og ekstremt raskt. Du vil også få vite hvilke fordeler dette gir, utover rask ledetid fra idé til produksjon, og hvorfor det er smidigere. Det er ganske sikkert flere grunner enn du tror.
In this session, we'll address the missing link in Enterprise Java development: simple, easy integration testing.
Unit tests and mock objects will only take you so far; the only answer which truly ensures that all components are playing nicely is a comprehensive integration suite. Unfortunately, writing integration tests has historically involved manual setup of a heavy, cumbersome test harness. That's time lost, but it doesn't have to be anymore.
Here we'll introduce Arquillian, a powerful container-oriented testing framework layered atop TestNG and JUnit. Arquillian manages your runtime, abstracting out deployment and allowing you to focus on real test logic. We'll cover:
Attend this talk to learn how the simplified component model of Java EE can be applied to testable development
7th–8th September 2011