Salt Lake Software Symposium
July 17 - 18, 2009 - Salt Lake City, UT
View the event details here ».
Stuart Halloway
CEO of Relevance
Stuart Halloway is the CEO of Relevance, Inc. (www.thinkrelevance.com). With co-founder Justin Gehtland, Stuart helps companies adopt agile, as well as innovative technologies such as Clojure and Ruby on Rails. Stuart is the author of Programming Clojure, Rails for Java Developers, and Component Development for the Java Platform. Prior to founding Relevance, Stuart was the Chief Architect at Near-Time, and the Chief Technical Officer at DevelopMentor.
Presentations
Agile, Relevance Style
The Agile Manifesto, like any good scripture, admits of many interpretations. There is no one "right path." What works for us may not work for you. At Relevance we have tried many paths, and learned many lessons. Join us to see dozens of ideas that have worked for us, plus some that haven't.
The Agile Manifesto states four key values:
- Individuals and interactions over processes and tools.
- Working software over comprehensive documentation.
- Customer collaboration over contract negotiation.
- Responding to change over following a plan.
That manifesto sounds great, but perhaps a little vague. It gets more concrete quickly when you start doing it! In this talk, we will share our experiences, both good and bad, with various practices and problems associated with agile:
- Pairing all the time (except when we don’t)
- Running cross-project retrospectives
- Code coverage standards
- Choosing the sharpest tools
- Fixed-bid projects
- Handling budget problems
- Teaching customers
- Setting the wrong kinds of targets
- Holding all participants accountable
- Forking everything
- Introducing new technologies
Hold on tight to your sacred cows, because no assumption you have about agile will be safe.
Taking Agile From Tactics to Strategy
Teams adopting agile should begin at a tactical level, but they shouldn't end there. The Agile Manifesto operates at many different levels. Learn to apply the principles of agile at a strategic level. Otherwise you can have a great agile ground game and still lose.
Many programming teams now embrace agile at the tactical level, which is the right place to begin. Applying the ideas in the Agile Manifesto, good teams embrace practices like
- story point estimation
- burndown tracking
- technical expertise
- behavior-driven development
- daily standups
- pair programming
- continuous integration
- spiking
- refactoring
- customer always available
- well-understood roles
The Agile Manifesto can be applied at a strategic level, too. However, the tensions are different. Feedback cycles are longer, objectives and results are less clear, and roles and relationships are unknown or changing. In this talk you will learn how to apply agile at the strategic realm, using practices like:
- measure the immeasurable
- pair everything
- choose meaningful standards
- build for tomorrow (but not next year)
- retrospect well
- spot the trends
- use the right medium
- want to succeed (not as obvious as it sounds!)
With the right practices in place, agility can help you choose objectives, as well as attain them.
Git control of your source
Git is not the next step in evolution of centralized source control, following in the footsteps of cvs, svn, etc. These tools provide centralized history of deltas, where git provides distributed history of trees of content. In this talk, you will see the advantages of the git approach:
Incredible speed. Local, disconnected operation. Source control workflow customized to your team. Centralized, distributed, or layered, you can build it with git. Cheap and easy branching, tagging, and merging. Editing and refactoring your commits.
You have probably heard about git by now, perhaps something along these lines: "Git is a version control system, and it is more powerful that Subversion in every way. You don't even have to be online to commit!"
This is true, but it undersells git. Git is not the next step in evolution of centralized source control, following in the footsteps of cvs, svn, etc. These tools provide centralized history of deltas, where git provides distributed history of trees of content. In this talk, you will see the advantages of the git approach:
- Incredible speed.
- Local, disconnected operation.
- Source control workflow customized to your team. Centralized, distributed, or layered, you can build it with git.
- Cheap and easy branching, tagging, and merging.
- Editing and refactoring your commits.
The git community prefers power to ease of use, and so git's user interface and documentation can be intimidating. You will learn the straight and narrow path for common, day-to-day git operations. You will also learn git's underlying data model, and get a quick introduction to more advanced concepts like submodules, cherry-picking, and bisection.
As a final bonus, you will see how to use git on an existing subversion project. You can use git as your svn client, and the rest of the team can stay on svn and not even care.
How to Fail with 100% Code Coverage
Over the last few years, we have taken dozens of projects to 100% coverage, and there are still plenty of things that can go wrong. We will look at examples the various problems, and show how to prevent them from infecting your project.
With an expressive language such as Groovy or Ruby and with modern test practices, 100% C0 test coverage is readily achievable. But 100% coverage is meaningless without other supporting habits and practices. Over the last few years, we have taken dozens of projects to 100% coverage, and there are still plenty of things that can go wrong.
We will look at examples of each of these problems, and show how to prevent them from infecting your project:
* Fragile mocking
* Pair bravado
* The ugly mirror
* Parallel abstraction
* Overspecification
* Underspecification
* Invisible code
* Misplaced exemplar
Agile Retrospectives
Agile teams manage change and risk by apapting. But to adapt, you must identify opportunities for change and take them. Retrospectives are a fun, cost-effective way for your team to learn and change.
In this talk, we will begin by conducting a mini-retrospective, so that you get a feel for the basic process. Next, we will review the core principles of a retrospective, and use these principles to compare and contrast a variety of retrospective activities from the book Agile Retrospectives.
Next, we will explore a few retrospective activities in greater detail. These are some of the favorites that we use regularly at Relevance:
- team radar
- prioritize with dots
- learning matrix
Finally, we will talk about how to tune retrospectives to the needs of your team at a specific moment in time. No two retrospectives are alike, and an experienced facilitator adds value by adapting a retrospective to meet the current need.
Java.next: Clojure, Groovy, JRuby, and Scala
In this talk, we will explore and compare four of the most interesting JVM languages: Clojure, Groovy, JRuby, and Scala. Each of these languages aims to greatly simplify writing code for the JVM, and all of them succeed in this mission. However, these languages have very different design goals. We will explore these differences, and help you decide when and where these languages might fit into your development toolkit. For more information see http://blog.thinkrelevance.com/2008/9/24/java-next-overview.
As we reach the middle of our second decade of Java experience, the community has learned a lot about software development. Many of our best ideas on how to use a Java Virtual Machine (JVM) are now being baked into more advanced languages for the JVM. These languages tend to provide two significant advantages:
- They reduce the amount of ceremony in your code, allowing you to focus on the essence of the problem you are solving
- They enable some degree of functional programming style. Think of it as a dash of verb-oriented programming to spice up your noun-oriented programming.
In this talk, we will explore and compare three of the most interesting new JVM languages: Clojure, Groovy, JRuby, and Scala. Each of these languages aims to greatly simplify writing code for the JVM, and all of them succeed in this mission. However, these languages have very different design goals. We will explore these differences, and help you decide when and where these languages might fit into your development toolkit.
Programming Clojure
Find out why Clojure is Java.next:
- Clojure provides clean, fast access to all Java libraries.
- Clojure provides all the low-ceremony goodness you know and love from dynamic languages such as Ruby and Python.
- Clojure includes Lisp's signature feature: Treating code as data through macros.
- Clojure's emphasis on immutability and support for software transactional memory make it a viable option for taking advantage of massively parallel hardware.
Clojure is a dynamic programming language for the Java Virtual Machine, with a compelling combination of features:
- Clojure is elegant. Clojure?s clean, careful design lets you write programs that get right to the essence of a problem, without a lot of clutter and ceremony.
- Clojure is Lisp reloaded. Clojure has the power inherent in Lisp, but is not constrained by the history of Lisp.
- Clojure is a functional language. Data structures are immutable, and most functions are side-effect free. This makes it easier to write correct programs, and to compose large programs from smaller ones.
- Clojure simpli?es concurrent programming. Of course, Java itself has pretty good concurrency support. But, there is wide agreement that lock-based concurrency is dif?cult to use correctly. Clojure provides alternatives to lock-based concurrency: software transactional memory, agents, and dynamic variables.
- Clojure embraces Java. Calling from Clojure to Java is direct, and goes through no translation layer.
- Unlike many popular dynamic languages, Clojure is fast. Wherever you need it, you can get the exact same performance that you could get from hand-written Java code.
Books
by Stuart Halloway
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Clojure is a dynamic language for the Java Virtual Machine, with a compelling combination of features:
Clojure is elegant. Clojure's clean, careful design lets you write programs that get right to the essence of a problem, without a lot of clutter and ceremony.
Clojure is Lisp reloaded. Clojure has the power inherent in Lisp, but is not constrained by the history of Lisp.
Clojure is a functional language. Data structures are immutable, and functions tend to be side-effect free. This makes it easier to write correct programs, and to compose large programs from smaller ones.
Clojure is concurrent. Rather than error-prone locking, Clojure provides software transactional memory.
Clojure embraces Java. Calling from Clojure to Java is direct, and goes through no translation layer.
Clojure is fast. Wherever you need it, you can get the exact same performance that you could get from hand-written Java code.
Many other languages offer some of these features, but the combination of them all makes Clojure sparkle. Programming Clojure shows you why these features are so important, and how you can use Clojure to build powerful programs quickly.
-
Clojure is a dynamic language for the Java Virtual Machine, with a compelling combination of features:
Clojure is elegant. Clojure's clean, careful design lets you write programs that get right to the essence of a problem, without a lot of clutter and ceremony.
Clojure is Lisp reloaded. Clojure has the power inherent in Lisp, but is not constrained by the history of Lisp.
Clojure is a functional language. Data structures are immutable, and functions tend to be side-effect free. This makes it easier to write correct programs, and to compose large programs from smaller ones.
Clojure is concurrent. Rather than error-prone locking, Clojure provides software transactional memory.
Clojure embraces Java. Calling from Clojure to Java is direct, and goes through no translation layer.
Clojure is fast. Wherever you need it, you can get the exact same performance that you could get from hand-written Java code.
Many other languages offer some of these features, but the combination of them all makes Clojure sparkle. Programming Clojure shows you why these features are so important, and how you can use Clojure to build powerful programs quickly.
by Stuart Halloway and Justin Gehtland
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Many Java developers are now looking at Ruby, and the Ruby on Rails web framework. If you are one of them, this book is your guide. Written by experienced developers who love both Java and Ruby, this book will show you, via detailed comparisons and commentary, how to translate your hard-earned Java knowledge and skills into the world of Ruby and Rails.
If you are a Java programmer, you shouldn't have to start at the very beginning! You already have deep experience with the design issues that inspired Rails, and can use this background to quickly learn Ruby and Rails. But Ruby looks a lot different from Java, and some of those differences support powerful abstractions that Java lacks. We'll be your guides to this new, but not strange, territory.
In each chapter, we build a series of parallel examples to demonstrate some facet of web development. Because the Rails examples sit next to Java examples, you can start this book in the middle, or anywhere else you want. You can use the Java version of the code, plus the analysis, to quickly grok what the Rails version is doing. We have carefully cross-referenced and indexed the book to facilitate jumping around as you need to.
Thanks to your background in Java, this one short book can cover a half-dozen books' worth of ideas:
Programming Ruby Building MVC (Model/View/Controller) Applications Unit and Functional Testing Security Project Automation Configuration Web Services
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Many Java developers are now looking at Ruby, and the Ruby on Rails web framework. If you are one of them, this book is your guide. Written by experienced developers who love both Java and Ruby, this book will show you, via detailed comparisons and commentary, how to translate your hard-earned Java knowledge and skills into the world of Ruby and Rails.
If you are a Java programmer, you shouldn't have to start at the very beginning! You already have deep experience with the design issues that inspired Rails, and can use this background to quickly learn Ruby and Rails. But Ruby looks a lot different from Java, and some of those differences support powerful abstractions that Java lacks. We'll be your guides to this new, but not strange, territory.
In each chapter, we build a series of parallel examples to demonstrate some facet of web development. Because the Rails examples sit next to Java examples, you can start this book in the middle, or anywhere else you want. You can use the Java version of the code, plus the analysis, to quickly grok what the Rails version is doing. We have carefully cross-referenced and indexed the book to facilitate jumping around as you need to.
Thanks to your background in Java, this one short book can cover a half-dozen books' worth of ideas:
Programming Ruby Building MVC (Model/View/Controller) Applications Unit and Functional Testing Security Project Automation Configuration Web Services
by Stuart Dabbs Halloway
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If you're serious about writing components in Java, this book focuses on the component services you need to master. DevelopMentor Chief Scientist Stuart Halloway presents unprecedented, in-depth coverage of writing, deploying, and maintaining Java components. Halloway begins by showing how to use, control, and troubleshoot components. He offers real-world guidance on reflection performance, and demonstrates how reflection is used to build the Java serialization architecture. He also offers detailed coverage of using the Java Native Interface (JNI) to control the boundaries between Java code and components written in other environments. In Part II, Halloway presents a practical vision for using component services to become a more effective Java developer. Through examples and sample code, he introduces generative programming techniques that leverage Java into high performance. Finally, building on these techniques, he shows how to construct robust interoperability between Java and Win32/COM.
- If you're serious about writing components in Java, this book focuses on the component services you need to master. DevelopMentor Chief Scientist Stuart Halloway presents unprecedented, in-depth coverage of writing, deploying, and maintaining Java components. Halloway begins by showing how to use, control, and troubleshoot components. He offers real-world guidance on reflection performance, and demonstrates how reflection is used to build the Java serialization architecture. He also offers detailed coverage of using the Java Native Interface (JNI) to control the boundaries between Java code and components written in other environments. In Part II, Halloway presents a practical vision for using component services to become a more effective Java developer. Through examples and sample code, he introduces generative programming techniques that leverage Java into high performance. Finally, building on these techniques, he shows how to construct robust interoperability between Java and Win32/COM.
