Domain Driven Design: Building Complex Software

DDD is a proven approach for modeling and building sophisticated software that deals with complex domains. Learn what it does, what kinds of projects it is best for, and how to start to implement DDD in your organization.

Engineering your DSLs

The easy part of implementing Domain Specific Languages is coding them. The hard part comes when you have to think about testing, documenting, evolving and providing appropriate editing interfaces for them.

NoSQL? No Problems

There are a wide range of NoSQL options, most of which solve very different problems. In the first part of this session we'll look beyond the hype to understand some real world use cases where NoSQL options can either replace or enhance a relational solution. You might be surprised at some of the reasons companies have chosen to successfully develop NoSQL based solutions.

In the second part of the session we'll look through a range of the common NoSQL offerings like CouchDB, MongoDB, Redis, Neo, Cassandra, Riak and hosted solutions like Googles BigTable and Amazons SimpleDB.

Requirements and Estimating

"What will it cost?" "When will it be done?". Unfortunately, almost a decade after the agile manifesto was written, these are still questions we have to answer on a regular basis.

In this session we'll cover a range of practical techniques for improving your requirements gathering and increasing the accuracy of your project estimates while also setting realistic expectations for your project stakeholders based on practical experience in specifying, quoting and delivering over four hundred applications over the last ten years.

Prerequisite: Previous experience with missing a milestone or blowing an estimated budget!

Tooling for External DSLs

Eventually if you do a lot of work with DSLs, you'll need to consider using external DSLs to make your languages more flexible and powerful.

Agile Engineering Practices

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Most of the time when people talk about agile software development, they talk about project and planning practices and never mention actual development practices. This talk delves into best development practices for agile projects, covering all of its aspects.

Prerequisite: Having worked in an organization that values bureaucracy more than individuals

Emergent Design

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Emergent design is a big topic in the agile architecture and design community. This session covers the theory behind emergent design and shows examples of how you can implement this important concept.

Prerequisite: understanding of architectural and design concepts

Evolving towards REST-based Enterprise Integration

This talk describes an agile approach to architecture, and merges the current state-of-the-art thinking in both service oriented architectures(SOA) and web-based architectures like HTTP, REST, and hypermedia.

Testing the Entire Stack

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This talk covers testing the entire stack: unit, integration, functional, behavior-driven, databases, user acceptance, mocking & stubbing, and other topics and strategies.

Prerequisite: Confusion about what to test when and where

Visualizations for Code Metrics

Judicious use of metrics improves the quality of your code. But interpreting metrics presents a challenge. You have a list of numbers for a project - what does it mean? And what does it tell me about the health of the project overall? This sessions shows how to produce visualizations for software metrics, making them easier to understand and more valuable. It covers metrics at the individual method level all the way up to the overall architecture of the application. This isn't just a talk about how some tools produce visualizations: this session shows you how to generate your own visualizations, allowing you to customize it to the level in information density that shows real value on your project. I show how to produce projected graphs from dependencies, heat-maps for cyclomatic complexity and code coverage, using XSLT to extract visual information from XML configuration documents, and others. Metrics can't help you if you can't understand them. By creating visualizations, it helps leverage metrics to make your code better.

Agile Project and Management Metrics: Measuring Success Downward and Upward

This session focuses on visibility of team progress and correcting team "bad smells" using Agile metrics. Since we use metrics to self-correct and sharpen the team, they are an integral part of each iteration and flow into release planning. We will discuss some of the How's and Why's of team metrics and review the risks that are inevitable when it comes to gathering metrics.

Iteration Management: What's in your Toolkit?

Is your Agile team running smoothly? How do you know? This answer is found in your iteration and your toolkit for constant team improvement! Comparing Iteration Management skills and tools to those of the Agile Project Manager, Scrum Master and Technical Leader roles, you will see that Iteration Management encompasses end to end activities of the iteration, which are crucial to unblocking your software production line and making your team a success.

The Agile Mindset: Applying Agile in Non-Technical Areas of an Organization

Agile techniques are often pigeon-holed as just applying to software projects and IT organizations. Agile techniques are a mindset more than a list of rules to follow and can bring efficiency and improvements to all areas of an organization.

Cryptography on the JVM: Boot Camp

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Does your application transmit customer information? Are there fields of sensitive customer data stored in your DB? Can your application be used on insecure networks? If so, you need a working knowledge of encryption and how to leverage Open Source APIs and libraries to make securing your data as easy as possible. Cryptography is quickly becoming a developer's new frontier of responsibility in many data-centric applications.

Encryption on the JVM: Advanced Techniques

Now that you have the basics of encryption under your belt, we'll advance to talking about where it is sensible and performant to add this level of security to your application. Symmetric key and public key encryption have various levels of processing overhead, so you can't blindly just use the "best" encryption out there. What about password hashes? Did you know they are vulnerable with our "salt"?

Prerequisite: Encryption Bootcamp on the JVM

Git Going with Distributed Version Control

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Many development shops have made the leap from RCS, Perforce, ClearCase, PVCS, CVS, BitKeeper or SourceSafe to the modern Subversion (SVN) version control system. But why not take the next massive stride in productivity and get on board with Git, a distributed version control system (DVCS). Jump ahead of the masses staying on Subversion, and increase your team's productivity, debugging effectiveness, flexibility in cutting releases, and repository redundancy at $0 cost. Understand how distributed version control systems are game-changers and pick up the lingo that will become standard in the next few years.

Prerequisite: Basic understanding of Subversion or similar version control system

Git Workshop (Bring A Laptop)

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Git is a version control system you may have been hearing a bit about lately. But simply hearing more about it may not be enough to convince you of its value. Getting hands on experience is what really counts. In this workshop, you'll bring your Windows, Mac or Linux laptop and walk through downloading, installing, and using Git in a collaborative fashion.

Prerequisite: Basic knowledge of a version control system. Subversion knowledge is a plus, but not imperative.

Hadoop: Divide and Conquer Gigantic Datasets (Advanced)

With the basics of Hadoop under your belt, we'll dig into the depths of this amazing framework by writing our own reducer in Java and deploying it to the cluster. Next, we'll dig deeper into DSLs like Pig and its log-file processing cousin, Chukwa. Since grid topology is intentionally very opaque in Hadoop, we'll look at the benefits and how to achieve a properly tuned cluster with replication. Specific to HDFS, we'll tune the configurable parameters for storage redundancy and bucket sizes.

Prerequisite: Hadoop: Divide and Conquer Gigantic Datasets (Intro)

Hadoop: Divide and Conquer Gigantic Datasets (Intro)

Moore's law has finally hit the wall and CPU speeds have actually decreased in the last few years. The industry is reacting with hardware with an ever-growing number of cores and software that can leverage "grids" of distributed, often commodity, computing resources. But how is a traditional Java developer supposed to easily take advantage of this revolution? The answer is the Apache Hadoop family of projects. Hadoop is a suite of Open Source APIs at the forefront of this grid computing revolution and is considered the absolute gold standard for the divide-and-conquer model of distributed problem crunching. The well-travelled Apache Hadoop framework is curently being leveraged in production by prominent names such as Yahoo, IBM, Amazon, Adobe, AOL, Facebook and Hulu just to name a few.

Open Source Debugging Tools for Java

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This session will survey a wide range of tools across the Java space. We'll look at utilities such as VisualVM, jstatd, jps, jhat, jmap, Eclipse Memory Analyzer, jtracert, btrace and more.

Open Source is not just a suite of libraries you consume within your application, but now reaches into the space of tools to help you troubleshoot and improve your applications. The price of these tools eliminates barriers to their use and their open source nature allows you to mix and match them into compositions that work well for your application's unique debugging needs.

Architectural Kata Workshop

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Fred Brooks said, "How do we get great designers? Great designers design, of course." So how do we get great architects? Great architects architect. But architecting a software system is a rare opportunity for the non-architect.

The kata is an ancient tradition, born of the martial arts, designed to give the student the opportunity to practice more than basics in a semi-realistic way. The coding kata, created by Dave Thomas, is an opportunity for the developer to try a language or tool to solve a problem slightly more complex than "Hello world". The architectural kata, like the coding kata, is an opportunity for the student-architect to practice architecting a software system.

Busy Java Developer's Guide to Advanced Collections

Once you've learned the core Collections clases, you're done, right? You know everything there is to know about Collections, and you can "check that off" your list of Java packages you have to learn and know, right?

Prerequisite: Busy Java Developer's Guide to Collections

Busy Java Developer's Guide to Android: Basics

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Android is a new mobile development platform, based on the Java language and tool set, designed to allow developers to get up to speed writing mobile code on any of a number of handsets quickly. In this presentation, we'll go over the basic setup of the Android toolchain, how to deploy to a device, and basic constructs in the Android world.

Pragmatic Architecture

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Building an application is not the straightforward exercise it used to be. Decisions regarding which architectural approaches to take (n-tier, client/server), which user interface approaches to take (Smart/rich client, thin client, Ajax), even how to communicate between processes (Web services, distributed objects, REST)... it's enough to drive the most dedicated designer nuts. This talk discusses the goals of an application architecture and why developers should concern themselves with architecture in the first place. Then, it dives into the meat of the various architectural considerations available; the pros and cons of JavaWebStart, ClickOnce, SWT, Swing, JavaFX, GWT, Ajax, RMI, JAX-WS, , JMS, MSMQ, transactional processing, and more.

The Busy Java Developer's Guide to Collections

For so many Java developers, the java.util.* package consists of List, ArrayList, and maybe Map and HashMap. But the Collections classes are so much more powerful than many of us are led to believe, and all it requires is a small amount of digging and some simple exploration to begin to "get" the real power of the Collection classes.

The Busy Java Developer's Guide to Functional Java

Much noise has been made in recent years about functional languages, like Scala or Haskell, and their benefits relative to object-oriented languages, most notably Java. Unfortunately, as wonderful as many of those benefits are, the fact remains that most Java developers will either not want or not be able to adopt those languages for writing day-to-day code. Which leaves us with a basic question: if I can't use these functional languages to write production code, is there any advantage to learning about them? The short answer is yes, for the fundamental premise--"I can't use functional code on my Java project"--is flawed. Java developers can, in fact, make use of functional ideas, and what's better, they don't even have to reinvent them for Java--thanks to the FunctionalJava library, many of the core primitives--interfaces that serve as base types for creating function values, for example--already exist, ready to be used.

Common AntiPatterns and How To Avoid Them

In the book "97 Things Every Software Architect Should Know" (O'Reilly, 2009) I wrote about the importance of design patterns as a useful means of communication between architects and developers. Equally important to patterns is an understanding of AntiPatterns - things that we repeatably do that produce negative results. AntiPatterns are used by developers, architects, and managers every day and are one of the main factors that prevent progress and success. In this session we will look at some of the more common and significant development and architecture antipatterns. Through coding and design examples, you will see how these antipatterns emerge, how to recognize when the antipattern is being used, and most importantly, how to avoid them. By attending this session, you will be part of a movement to reduce the AntiPattern catalog from hundreds of entries to only a few.

Prerequisite: None

Enterprise Integration Using Apache Camel

Apache Camel is a robust open source integration framework that handles routing and mediation tasks associated with enterprise integration. Camel allows you to quickly and easily route messages and integrate components in a distributed, decoupled manner. For example, using the Camel Java DSL, you can send and receive JMS messages in just a couple of lines of Java code. In this live coding session I will describe what Camel is, describe the overall architecture, show why it is useful, and demonstrate through live coding examples how to use the Camel Java DSL to write simple (and complex) routing logic. By attending this session you will learn Camel well enough to use it at work the next day.

The Art of Messaging

Messaging is both a science and an art. Messaging is a science with respect to the mechanics of the JMS API and the syntax for sending and receiving messages. However, messaging is also an art when it comes to applying the JMS API to solve real-world problems. In this session I will review some of the more common use cases for messaging and show techniques for significantly increasing both the performance and scalability of messaging-based applications. Using ActiveMQ, you will see how to create embedded brokers, how to use asynchronous logging with Log4J and JMS, and how to significantly speed up your messaging applications. In this session I will also describe and demonstrate some emerging trends in messaging, including RESTful JMS (that is, JMS over HTTP) and also AMQP (Advanced Message Queuing Protocol). Come to this session to find out how much fun messaging can really be!

Prerequisite: Some knowledge of JMS and Messaging in general

Agile UI

Some developers assume that agility and usability are mutually exclusive - in reality, they are extremely complimentary; if you squint, you might have a hard time telling the difference between agile practices and good user interface design. This usability talk is aimed squarely at developers giving you the tools you need to develop UIs that won't make your users yack. We'll discuss the importance of observation, personas, paper prototyping, usability testing and the importance of good moderators. In addition, we'll map the various aspects of user interface design to a typical agile iteration.

HTML 5 Fact and Fiction

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For the last few years, the web has been all a-twitter about web 2.0 (and even the occasional reference to web 3.0.) Yes, the days of static web applications are officially over and while libraries like jQuery and Prototype make it easier to build modern applications, ultimately they are papering over issues in the web standards (and the browsers that implement them.) Today we're building to standards that are from the paleolithic era of web design but that's changing - and HTML 5 is a large part of that. In this talk, we'll discus just what HTML 5 is and why it matters. We'll show how you can build to HTML 5 today and which browsers support what. Thankfully, after many years of stagnation, the future of web applications looks bright!

Hacking Your Brain for Fun and Profit

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The single most important tool in any developers toolbox isn't a fancy IDE or some spiffy new language - it's our brain. Despite ever faster processors with multiple cores and expanding amounts of RAM, we haven't yet created a computer to rival the ultra lightweight one we carry around in our skulls - in this session we'll learn how to make the most of it. We'll talk about why multitasking is a myth, the difference between the left and the right side of your brain, the importance of flow and why exercise is good for more than just your waist line.

JavaScript Beyond the Basics

JavaScript is one of the most widely used languages around and yet its also one of the most misunderstood. With Ajaxified UIs becoming the norm, this humble language is once again at the forefront.

jQuery: Ajax Made Easy

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Sure, Ajax might not be the hardest thing you'll have to do on your current project, but that doesn't mean we can't use a little help here and there. While there are a plethora of excellent choices in the Ajax library space, jQuery is fast becoming one of the most popular. In this talk, we'll see why. In addition to it's outstanding support for CSS selectors, dirt simple DOM manipulation, event handling and animations, jQuery also supports a rich ecosystem of plugins that provide an abundance of top notch widgets. Using various examples, this talk will help you understand what jQuery can do so you can see if it's right for your next project.

Agile Velocity

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The agile development process is all about early and often feedback. One aspect of feedback is how is the team doing... Are we accurate in our estimates? Are we consistent in our velocity? As velocity varies, what is it telling me?

Architecture: Non-Functional Requirements

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The agile focus of software development puts heavy focus on user requirements through user stories. However we can not lose sight of the non-functional requirements as well. The software could be written to the exact specification and desire of the user, however if it takes 5 minutes for a request response, or it only supports 2 users or it isn't secure, then we still haven't done our jobs as developers.

Enter The Gradle

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This presentation introduces the audience to the power of Gradle through many real-world examples that are demonstrated live. By the end of the presentation, you'll understand how Gradle helps to elegantly solve the challenges that we face in our daily enterprise builds.

Enterprise Security API library from OWASP

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When it comes to cross cutting software concerns, we expect to have or build a common framework or utility to solve this problem. This concept is represented well in the Java world with the loj4j framework, which abstracts the concern of logging, where it logs and the management of logging. The one cross cutting software concern which seems for most applications to be piecemeal is that of security. Security concerns include certification generation, SSL, protection from SQL Injection, protection from XSS, user authorization and authentication. Each of these separate concerns tend to have there own standards and libraries and leaves it as an exercise for the development team to cobble together a solution which includes multiple needs.... until now... Enterprise Security API library from OWASP.

Security Boundaries

Security is a large concern in today's world of software development. Security is a multi-dimensional problem requiring skills at a number of different levels. This session is a security overview of a typical Java web development stack.

Security Code Review

Security concerns abound... According to Gartner 75% of all attacks are at the web application tier. There has never been a more urgent time to understand the security concerns and how to apply solutions to our web applications.

So you want to be an Architect

This session is a quick look at all aspects of being a corporate software architect. Whither you are a developer looking to move into the role of architect, needing to have an understanding of what is expected or already in the role of software architect looking for new and interesting ideas, this session is for you.

HTML 5 ... and the Kitchen Sink

HTML 5 is an adventurous and confusing prospect that will help change the Web as we know it. It is being finalized as a standard but won't be fully supported by most browsers for quite some time. Companies like Apple and Google have already committed to it as the future of Web application development, however. There are a huge number of new features, updates and gotchas coming at us (including the proverbial kitchen sink!) so it is time to get prepared. This talk will walk you through the new bits and try to put it all into perspective.

RDFA : Weaving Richness and Meaning in the Web

The human web is reasonably well in hand by now. We are getting pretty good at building systems that people find valuable and entertaining. We have not spent as much time concerned about our software friends. There is a ton a rich content available on the web that is too difficult to extract in automated ways using just XHTML, the meta tag and microformats. This talk will introduce you to some emerging technologies from the Semantic Web camp to enrich your web pages with useful information for both automated extraction and improved browsing experiences.

REST : Information-Driven Architectures for the 21st Century

There is a shift going on in the Enterprise. While still used and useful, the promises of the SOAP/WSDL/UDDI Service-Oriented Architecture (SOA) stack have failed to live up to their promise. A new vision of linked information is enveloping online and Enterprise users. The REST architectural style is squarely behind this thinking as a way of achieving low-cost, flexible integration, increased data security, greater scalability and long-term migration strategies.

If you have dismissed REST as a toy or are unfamiliar with it, you owe it to yourself to see what is so interesting about this way of doing things.

SPARQL : Querying the Web of Data

The human-friendly Web is about nicely-formatted, accessible content for users to browse. There are emerging Data Webs (both public and private) that rely on technologies from the Semantic Web stack to link increasingly rich connections between various data sources. SPARQL and RDF are the main tools for expressing and using this connectivity. This talk will introduce you to one of these topics and the practical and accessible aspects of employing them on the Web and in the Enterprise.

Getting people to come to consensus on common models and schemas is usually the hardest part of any data integration strategies. These technologies help lower the bar on both the technical and social costs of stepping up your integration strategies.

Semantic SOA : Meaningful Service Strategies

The goal for web services was always to reduce our burden by increasing the potential for reuse of business functionality. Somehow, we got lost along the way in a morass of confusing, unfulfilling and downright broken technologies.

While we are interested in pursuing REST-based systems for managing information, we need some strategies for tying it all together sensibly. If we abandon WSDL, SOAP and UDDI, what do we replace them with? This talk will walk you through combining resource-oriented strategies with technologies from the Semantic Web to describe, find, and bind to services in dynamic, flexible and extensible ways.

We will start to blur the distinction between data, documents, services and focus on information and how it is connected to what we already know.

Prerequisite: The Semantic Web: The Future Now, Give it a REST and SPARQL : Querying the Data Web would all be helpful talks to have attended

Agile Development with OSGi

There isn't much said in typical Agile conversation about architecture and modularity. We will attempt to redress this omission by examining an agile approach to logical system architecture coupled with a potential implementation for the Java platform.

Tracer Bullet Development (TBD) is a technique that allows you to prove out the proposed architecture of your system by firing a "tracer bullet" through a vertical slice of your system that exercises all of its horizontal components. It has multiple benefits, including encapsulation, decoupled code, parallel code development, and more.

OSGi is a specification for a dynamic module system for Java with multiple open source implementations. It allows you to modularize your system into "bundles" which essentially firewall their own classloader space. Objects running within a bundle can only see types that they explicitly import and only expose types that they explicitly export. They interact with other bundles by expose and consuming services which are registered under a public interface.

At face value it seems that Tracer Bullet Development and OSGi are a match made in heaven!

Polyglot OSGi

One of the greatest benefits of OSGi is its firewall-esque encapsulation of implementation details. The only traffic that gets in or out is the traffic that you explicitly specify; otherwise, all bets are off. The aspiring polyglot can bring in the right tool for the right job by hiding it behind OSGi services as an “implementation detail,” provided that only Java language types are exported.

The Agile Guerilla

So you discovered agile software development this weekend. You've finally found the tools that you're going to use to fix your team. Do you rush in to work Monday morning with a slide deck in one hand and a baseball bat in the other, ready to bludgeon the first person who checks in untested code? How do you think that's going to work out for you? I can tell you from personal experience that it doesn't play out too well. There is a better way.

The Seven Wastes of Software Development

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One of the first principles of lean software development is the elimination of waste. Shigeo Shingo identified seven types of manufacturing waste in his "A Study of the Toyota Production System." Later, the Poppendieck's translated these to seven wastes of software development.

Yes You Kanban

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Kanban. What is it? It is most certainly not just moving sticky notes around on a board. Far from that, it is a method for gradual, evolutionary improvement of existing software processes. That's right, existing software processes. There is no "Kanban Development Process." Think you're "doing Kanban?" Think again.

Design Patterns in Groovy

When I got into Java I had a "Wow, look how easy it is to implement these patterns." When I got into Groovy, I had the same reaction, but only better. The dynamic nature of Groovy makes it easier to implement some common patterns. What's better, there are some patterns that you can exploit in Groovy that are not so easy in Java. In this section, you will learn how to implement some traditional patters in Groovy, and also other patterns you are simply not used to in Java.

Prerequisite: Some knowledge of Groovy is essential.

Functional Programming in Groovy

Functional programming style is gaining popularity. Though Groovy is not a functional programming language, writing in functional style is common and idiomatic in Groovy. While you have used these features in Groovy, learning the tents of functional programming will help you recognized these and make better use of them in the future.

How to Approach Refactoring

You can't be agile if your code sucks. You know that you have to constantly refactor your code and design. But the questions is how? In this presentation, instead of looking at a laundry list of refactoring techniques, we will instead look at how to effectively approach refactoring and along the way discuss some core principles to look for.

Improving your Groovy Code Quality

Groovy is concise and expressive. However, writing good quality code takes effort and discipline.

Keynote: It could be heaven or hell (being a polyglot programmer)

Keynote discussing the benefits and challenges of being a polyglot programmer.

Objective-C for Experienced Programmers

This session is intended for programmers with good working knowledge in at least one OOP language and interested in learning Objective-C to develop Mac and iPhone Apps.

Scala Tricks

Scala is a very powerful hybrid functional pure object oriented language on the JVM. Scala is known for its conciseness and expressiveness. In this presentation we will look at some common tasks you do everyday in developing applications and see how they manifest in Scala.

Tackling Concurrency on the JVM

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In this presentation we will take a quick walk though the issues with concurrency and how the solutions provided in Scala and Clojure help address those.

Test Driving Multithreaded Code

Once I got convinced about the benefits of TDD, I used it pretty extensively and consistently to drive the design and development of my code. So, it came as a surprise when I was trying to convince myself that those practices do not apply on a highly multithreaded code I was creating on a project. Thankfully, I set out to prove that TDD does not apply, but ended up proving myself wrong.

Transforming to Groovy

Groovy is a elegant, dynamic, agile, OO language. I like to program in Groovy because it is fun and the code is concise and highly expressive. Writing code in a language is hardly about using its syntax, however. It is about using the right idioms. Come to this section to pick up some nice Groovy idioms.

Prerequisite: Some knowledge of Groovy is helpful but not required.

Unit and Functional Testing using Groovy

The concise, expressive syntax of Groovy and the ability to create internal DSLs make Groovy a great language for testing related tools. I

What's Brewing in Java

Java has come a long way, and yet there is so much that's happening in this space. In this presentation we will take a look at the exciting additions and changes coming up in the next version of Java.

Prerequisite: Good programming knowledge of Java

Beyond Scaffolding: A deeper dive into Spring Roo

In this session, we'll go beyond the Spring Roo basics and see what makes it tick. We'll learn how to guide Spring Roo with annotations, how to customize a Roo-generated application, and how to write a Spring Roo addon.

Introducing Spring Roo: From Zero to Working Spring Application in Record Time

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In this example-driven session we'll see how to swiftly develop Spring applications using Spring Roo. We'll start with an empty directory and quickly work our way up to a fully functioning web application. You'll see how Roo handles a lot of heavy-lifting that you'd normally have to do yourself when working with Spring. And we'll stop at a few scenic points along the way to see how Roo accomplishes some of its magic.

Securing Spring

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In this session, I'll show you how to secure your Spring application with Spring Security 3.0. You'll see hot to declare both request-oriented and method-oriented security constraints. And you'll see how SpEL can make simple work of expressing complex security rules.

What's new in Spring

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In this session, I'll lead a guided tour through the latest that Spring has to offer. Whether you're a Spring veteran or a Spring newbie, there will be something new for nearly everyone.