Track: Java - Performance, Patterns and Predictions


Day of week:

Java may be a mature language, but it continues to change and evolve.  Not only do new versions bring new idioms and  APIs, but fashions change and alternative patterns of working continue to be embraced. With the software landscape changing to embrace multi-core, smaller design, and cloud deployments, developers need to understand how these feature sets impact fundamentals like performance, concurrency, and Java's ubiquity. This track focuses on these trends and reminds us of our fundamental computer science principles and how they're applicable in this modern world.

Track Host:
Trisha Gee
Java Champion, Engineer and Evangelist
Trisha has developed Java applications for a range of industries, including finance, manufacturing, technology, open source and non-profit, for companies of all sizes. She has expertise in Java high performance systems, and is passionate about enabling developer productivity. Trisha blogs regularly on subjects that she thinks developers and other humans should care about, she’s a leader of the Sevilla Java User Group, a key member of the London Java Community and a Java Champion - she believes we shouldn't all have to make the same mistakes again and again.
10:35am - 11:25am

by Holly Cummins
Senior Software Engineer @IBM, Committer on Apache Aries

Cool? Useful? Disruptor? All of the above? IoT is having an impact on more and more industries. As the cost of instrumenting things and collecting data drops, the possibilities for what we can control and the kind of insights we can gather increase. Not only is IoT hardware cheaper and more pervasive, developing IoT software is now far more accessible. That doesn't mean there aren't tricky bits. Does Java have relevance in the IoT world? How can you keep the system reliable and handle...

11:50am - 12:40pm

by Brian Goetz
Java Language Architect @Oracle

As core counts continue to increase, how we exploit hardware parallelism in practice shifts from concurrency — using more cores to handle more user requests — to parallelism — using more cores to solve data-intensive problems faster. This talk will explore the different goals, tools, and techniques involved between these various approaches, and how to analyze a computation for potential parallelism, with specific attention to the parallel stream library in Java.

1:40pm - 2:30pm

by Trisha Gee
Java Champion, Engineer and Evangelist

The feature we always hear about whenever Java 9 is in the news is Jigsaw (or modularity). But this doesn't scratch the same developer itch that Java 8's lambdas and streams did, and we're left with a vague sensation that the next version might not be that interesting.

Java 9 actually has a lot of great additions and changes to make development a bit nicer. These features can't be lumped under an umbrella term like Java 8's lambdas and streams, the changes are scattered throughout the...

2:55pm - 3:45pm

by Greg Young
Created the term CQRS

Have you ever wondered about event sourced systems and how they work? How to structure things around a transaction log yet still keep the system stable over time when change arises. In this talk we will look at Event Sourcing as a concept as well as specific JVM based implementations that are available. A main focus will also be on where such an implementation would be beneficial (or not!).

4:10pm - 5:00pm

by Nitsan Wakart
Performance Consultant and OSS Contributor

FlameGraphs offer us a new way to visualize execution profiles, combined with Linux system profiler perf and the recently added -XX:+PreserveFramePointer option in JDK 8u60 we now have for the first time a way to capture a comprehensive profile for the OS, JVM and your Java code.

In this session, we explore the JVM and Java applications using this new perspective and reflect on the profiles and the utility of this new method:

  • Introduction to FlameGraphs
  • Old...
5:25pm - 6:15pm

Open Space