Complexity Theory and Software Development

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Some systems are too large to be understood entirely by any one human mind. They are composed of a diverse array of individual components capable of interacting with each other and adapting to a changing environment. As systems, they produce behavior that differs in kind from the behavior of their components. Complexity Theory is an emerging discipline that seeks to describe such phenomena previously encountered in biology, sociology, economics, and other disciplines.

Decision Making in Software Teams

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Alistair Cockburn has described software development as a game in which we choose among three moves: invent, decide, and communicate. Most of our time at No Fluff is spent learning how to be better at inventing. Beyond that, we understand the importance of good communication, and take steps to improve in that capacity. Rarely, however, do we acknowledge the role of decision making in the life of software teams, what can cause it to go wrong, and how to improve it.

Gaelyk: Lightweight Groovy on the Google App Engine

You love Groovy and you're a believer in cloud computing. For a larger project you might choose Grails and hosting on Amazon EC2, but what if you want to take advantage of the nearly massless deployments of a cloud provider like the Google App Engine? You could make Grails work, but it's not always the best fit. Enter Gaelyk.

Learning Open Source Business Intelligence

Traditionally, business intelligence tools have been a high-cost part of any enterprise's software inventory. Recently, options have emerged that allow architects to build a credible business intelligence stack out of entirely open-source components. In this brief overview, we will demonstrate ETL, reporting, and analytics tool that can be deployed free or at low cost. Learn how to turn your company's transactional database into a rich data asset with a business-friendly user interface that integrates into your existing software infrastructure.

Open Source Business Intelligence Workshop

Once you're familiar with the concepts of data warehousing, star schemas, cubes, and pivot tables, then it's time to dive in and look at how the tools really work. Continuing from the quick demos in Part I, this workshop session will have you building an actual ETL process with Talend Open Studio. This hands-on exercise will acquaint you with the tooling and solidify the concepts you've learned.

Prerequisite: Learning Open Source Business Intelligence (or a solid grasp of BI concepts)

Compile Time and Runtime Metaprogramming With Groovy

Groovy should feel instantly familiar to Java developers -- after all, Groovy is an extension to the Java language. Many of Groovy's enhancements come in the form of metaprogramming, or new methods added to existing classes. In this talk, we'll take a look at how Groovy adds these methods to Java classes, and how you can do the same. Despite the somewhat frightening nomenclature, it's much easier than you might think.

Grails + CouchDB

Apache CouchDB is a schema-free document store that uses HTTP GETs, PUTs, and DELETEs instead of SQL SELECTs, INSERTs, and DELETEs. It speaks JSON fluently instead of tables, columns, and rows. It uses JavaScript Map/Reduce functions instead of SQL for the query language. It offers effortless replication among distributed CouchDB instances.

Tomorrow's Tech Today: HTML 5

In this talk, you won't be subjected to discussions about the features that will appear in some distant future release of a web browser. Instead, you'll see the HTML 5 features that are already being used by Google, Apple, and others. You'll see the features that are supported by today's browsers, ready for you to use right now.

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.

Keynote: Smithing in the 21st Century

Blacksmiths in 1900 and PowerBuilder developers in 1996 have something in common: they thought their job was safe forever. Yet circumstances proved them wrong. One of the nagging concerns for developers is how do you predict the Next Big Thing, preferably before you find yourself dinosaurized. This keynote discusses why people are bad at predicting the future, and why picking the Next Big Thing is hard. Then, it foolishly does just that: tries to predict the future. I also provide some guidelines on how to polish your crystal ball, giving you tools to help ferret out upcoming trends. Don't get caught by the rising tide of the next major coolness: nothing's sadder than an unemployed farrier watching cars drive by.

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.

Groovy Web Services, Part I: REST

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Groovy has excellent networking capabilities and is great at processing XML, which makes it a natural for working with RESTful web services.

Groovy Web Services, Part II: SOAP and JAX-WS

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Although RESTful web services have gotten better press, SOAP-based web services are often the backbone of many large enterprises. The user-friendly advances in JAX-WS 2.* make developing such services much easier. As with most Java topics, Groovy simplifies the development of web services as well. Since it is particularly well-suited to XML processing, Groovy is quite helpful in the web services and SOA worlds.

Improve Your Java with Groovy

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Groovy was never intended to replace Java. Instead, it expands Java capabilities and makes developers' lives easier. In this presentation, we'll survey many ways to make your Java systems easier by adding Groovy.

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

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.

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.

Architectural Kata Workshop, Part II

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.

Busy Java Developer's Guide to Games

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Games? What do games have to do with good business-oriented applications? Turns out, a lot of interesting little tidbits of user-interface, distribution, and emergence, found normally in the games we play, have direct implications on the way enterprise applications can (or should) be built.

Busy Java Developer's Guide to Multi-Paradigm Design

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The Java Virtual Machine is home to several different languages beyond Java, many of which mix ideas (paradigms) together to create a flexible language. Languages which support these different paradigms can be awkward and hard to understand how to use at first.

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.

Automated Software Quality Control Tools

This session is aimed at helping developers get started with automating the collection of software quality metrics. We'll cover continuous integration, automated code metrics gathering, and analysis of these metrics. The ability to be able to detect problems early, and also to write higher quality code early, helps avoid bugs and headache down the line. We'll cover some best practices around using and putting in tools to help achieve higher quality.

From Zero-to-Hero with EHCache

Ehcache is the most popular open source cache framework for the JVM. It is integrated into many open-source packages, such as Grails. First, we'll cover the concept of caching objects and use cases around caching. In this session, we'll get into Ehcache details about architecture, configuration, design, cache types and more. Attendees will learn how to configure Ehcache and we'll discuss the major configuration options. We'll also do some live code demos so attendees can better understand the concepts and features of caching and Ehcache. Of course, we'll also see how it plugs into ORM / JPA tools like Hibernate.

Intro to Clustering with Terracotta

Terracotta is an open-source cluster framework. In this session, attendees will begin by learning about Terracotta architecture and setup. We'll then examine the Terracotta Toolkit in detail with live code examples. Attendees will learn about features in the Terracotta toolkit: barriers, locking, clustered collections, and more. We'll discuss the usage of these features and how to best utilize them across a cluster of JVM's / app servers. We'll also talk about how to setup for high-availability.

Virtualization for development

We've all heard about virtualization for deploying applications. How about leveraging virtualization for development? In this session, we'll look at some time saving tips and build a virtual VM for development and testing.

Groovy + The Semantic Web

The Semantic Web is Tim Berners-Lee's full vision of what the Web can and will be. This HTML stuff we are all so enamored with is just the tip of the iceberg. "Web 2.0" is a kindergarten plaything (and a stupid name). Webs of linked data will allow us unprecedented flexibility in how we produce and consume information. While many people have been waiting on the sideline for the Semantic Web to get here, others have been making it happen.

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.

Metaprogramming the Microkernel: Groovy + NetKernel

Most organizations have a pretty conservative attitude toward adopting technology. If you are allowed to use a language like Groovy, chances are it is still going to be deployed in a conventional container like Tomcat or some other J2EE infrastructure.

What would happen if you took the power of a language like Groovy and married it to a next-generation environment like NetKernel? Imagine combining the power of Groovy metaprogramming with a microkernel-based resource-oriented environment. Expressive, powerful, scalable. It's pretty much guaranteed to rip a hole in the space time continuum. Come watch it happen.

You will be amazed at how much can be accomplished with so little code (not to mention how well it will perform).

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.

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!

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.

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.

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.

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.

Modular Java: An Introduction to OSGi

Contrary to what you may have heard, OSGi is neither complex, nor heavyweight. In this session, I'll show you how OSGi can actually simplify application development rather than complicate it. We'll look at the benefits of modularity, the fundamentals of OSGi, and see how to develop basic OSGi bundles. We'll also see how a few gadgets in the OSGi toolbox can ease the development of OSGi bundles.

NoXML: Spring for XML-Haters

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In this presentation, we'll explore all of the ways to do bean wiring in Spring We'll take a pragmatic view of each style, evaluating their strengths, weaknesses, and applicability to varying circumstances.

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.