technology

Jonas Bonér, CTO of LightBend and creator Akka, discusses using Akka when developing distributed systems. He talks about the Actor Model, and how every Microservice needs to be viewed as a system to be successful. 

Why listen to this podcast:

 - Akka is JVM-based framework design for developing distributed systems leveraging the Actor Model - an approach for writing concurrent systems that treat actors as universal primitives and the most successful model with abstraction has been streaming
 - Circuit breakers in Akka are a backup and retry policy; they protect you by capturing failure data and allow you to roll back 
 - Every Microservice needs to be viewed as a system, it needs to have multiple parts that run on different machines in order to function and be fully resilient - thus is a Microsystem
 - Two different trends have emerged when it comes to hardware and environments: one is the trend toward Multi-core, the is a movement toward virtualized environments and the cloud
 - Saga pattern of managing long running transactions in a distributed system fits very well with messaging style architectures

Notes and links can be found on: http://bit.ly/2kwB2eB

Akka
The Actor Model
When Akka and the Actor Model is the perfect choice
Circuit breakers patterns in distributed systems
Two trends toward Multi-core
Reactive Manifesto
Event Driven vs. Message Driven
Reactive Programming and Streams
Microliths to Microsystems
What do you have to get right before you start trying to deploy a distributed systems?
Working with ML / AI at Lightbend to understand tracing through distributed system
Saga Pattern

More on this:
Quick scan our curated show notes on InfoQ http://bit.ly/2kwB2eB

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Show Notes

Jonas Bonér on the Actor Model, Akka, Reactive Programming, Microservices and Distributed Systems

Why listen to this podcast:

 - Using a compiler to catch errors at compile time instead of at runtime means much easier refactoring of code.
 - Incrementally replacing small parts of an existing JavaScript application with Elm is a safer strategy than trying to write an entirely new application in Elm
 - Elm packages are semantically versioned and gated by the publishing process, so minor versions cannot remove functionality without bumping the major version.
 - The UI in an Elm application results in messages that transform the immutable state of the application; this allows a debugger to view the state transitions and the messages that triggered them, including record and replay of those messages.
 - Elm has been benchmarked as being faster than Angular and React whilst being smaller code, which is attributed to the immutable state and pure functional elements.

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Richard Feldman Discusses Elm and How It Compares to React.js for Front-end Programming

Rossen Stoyanchev talks to Wesley Reisz about blocking and non-blocking architectures, upcoming changes in Spring including Spring WebFlux, the reactive web stack in Spring framework 5, due this summer.  He also discusses the differences between rxJava and Reactor.

Why listen to this podcast:

 - Spring Framework 5 is due to be released June 25 2017
 - Spring Web Flux provides a web programming model designed for asynchronous APIs
 - Back-pressure is important in a server environment; less so within a UI environment
 - It’s possible to use a Spring Web Flux client within a Spring MVC applciation
 - Managing sets of thread pools is more complicated than having a scalable asynchronous system

More on this: Quick scan our curated show notes on InfoQ http://bit.ly/2pPgq0G

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Rossen Stoyanchev on Reactive Programming with Spring 5 and Spring WebFlux

Why listen to this podcast:

- Kotlin is an officially supported language on Google Android platforms  
- Kotlin Native and Kotlin JS will allow code reuse between server, client and mobile devices 
 - Type safety means that references can be checked for nullability Great tooling is a driver in what kind of language features are (and aren’t) adopted 
 - Coroutines provide a way of creating maintainable asynchronous systems

More on this: Quick scan our curated show notes on InfoQ http://bit.ly/2sHyxqQ

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Kotlin Lead Language Designer Andrey Breslav on Android Support, Language Features and Future Plans

On this week’s podcast, Wes Reisz talks with Brian Goetz. Brian is the Java Language Architect at Oracle. The two start with a discussion on what the six-month cadence has meant to the teams developing Java. Then move to a review of the features in Java 9 through 12. Finally, the two discuss the longer-term side projects (such as Amber, Loom, and Valhalla) and their role in the larger release process for the JDK.

* The JVM’s sixth-month cadence changed the way the JDK is delivered and planned. While it definitely provides more rapid delivery at expected intervals, the release train approach turned out to also improve flexibility and efficiency.
* Oracle JDK and OpenJDK are almost identical. Most of the JDK distributions are forks from OpenJDK with different bug fixes and backports applied. So the difference between the distributions now is largely which bug fixes are picked up.
* Local Variable inference (which was released as part of Java 10) illustrated the tension on making changes to the language. Many people wanted the change, but many others felt it would enable people to write bad code. Oracle had to balance the two views when making the change.
* The number of Java versions allow finer grain decision making on what is appropriate for an application. With the adoption of containers, applications are bundled with an exact JDK version rather than having to use one from a systems level. The different versions give developers more options.
* Incubating features are new libraries added to the JDK. They were offered starting with Java 9 as a way for people to test and offer feedback more rapidly. With Java 12, preview features will be released. Preview features are similar but are core platform and language features.
* Shenandoah and ZGC are both low latency garbage collectors. They originally came from different sources. While both garbage collectors are similar, each has different performance characteristics under different workloads. The two garbage collectors represent options available to JVM developers.
* Most non-trivial JDK features take more than six months to develop. Longer term side projects like Amber, Loom, Valhalla are where these features are developed prior to being released with a version of the JDK. The projects range from language enhancements to concurrency work.

Java Language Architect Brian Goetz on Java and the JDK

In this podcast Charles Humble and Wes Reisz talk about autonomous vehicles, GDPR, quantum computing, microservices, AR/VR and more.

* Waymo vehicles are now allowed to be on the road in California running fully autonomous; they seem to be a long way ahead in terms of the number of autonomous miles they’ve driven, but there are something like 60 other companies in California approved to test autonomous vehicles.

* It seems reasonable to assume that considerably more regulation around privacy will appear over the next few years, as governments and regulators grapple with not only social media but also who owns the data from technology like AR glasses or self-driving cars.

* We’ve seen a huge amount of interest in the ethical implications of technology this year, with Uber getting into some regulatory trouble, and Facebook being co-opted by foreign governments for nefarious purposes. As software becomes more and more pervasive in people's lives the ethical impact of what we all do becomes more and more profound.

* Researchers from IBM, the University of Waterloo, Canada, and the Technical University of Munich, Germany, have proved theoretically that quantum computers can solve certain problems faster than classical computers.

* We’re also seeing a lot of interest around human computer interaction - AR, VR, voice, neural interfaces. We had a presentation at QCon San Francisco from CTRL-labs, who are working on neural interfaces - in this case interpreting nerve signals - and they have working prototypes. Much like touch this could open up computing to another whole group of people.

Show notes

Charles Humble and Wes Reisz Take a Look Back at 2018 and Speculate on What 2019 Might Have in Store

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Kotlin Lead Language Designer Andrey Breslav on Android Support, Language Features and Future Plans

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