What we're about

PJUG has been around from the early days of Java. We welcome speakers from diverse backgrounds who want to explain Java-related technologies that our members can take back and use right away. We ask that if you are in part describing your company's product, you give the audience information that they can use regardless of whether they purchase your product.

PJUG is an all volunteer effort. We meet on the 4th Tuesday of every month. We need suggestions/volunteers for topics! If you'd like to donate your time/skills to the cause, contact Ian Downard on Twitter, @iandownard.

Upcoming events (3)

1) Reactions to Amazon Corretto. 2) Serverless Database, FaunaDB.

This meeting will have two parts. Ian Downard will begin with a short talk about an OpenJDK distribution from Amazon called Corretto. Then Chris Anderson from FaunaDB will talk about the principles of serverless databases and tradeoffs in guaranteed consistency and global replication. # TITLE: Reactions to the latest OpenJDK, Amazon Corretto # SPEAKER: Ian Downard # ABSTRACT: The latest Java distribution to be released into the world has come from Amazon in the form of an OpenJDK distribution they call Corretto. This exciting news has many Java enthusiasts wondering what they should consider when evaluating JDKs for building and running Java software. In this very short presentation, Ian will summarize the history and principles of OpenJDK so that we can better understand how Corretto delivers on the expectation that it be secure, stable, and free. # TITLE: Design Patterns for Serverless Databases # SPEAKER: Chris Anderson # ABSTRACT: Over the past decade, application developers have discovered that it is extremely difficult to build bug-free applications over database systems that do not guarantee consistency. In recent articles, Prof. Daniel Abadi went into deep technical detail comparing Google Spanner and Calvin, the two major approaches to guaranteeing consistency in geo-replicated database systems - global consensus vs partitioned consensus. FaunaDB’s architecture does not experience the latency cost of delaying transactions by clock skew uncertainty, a cost that is present in many other consistent database systems. In this talk I'll show how deterministic transaction resolution means FaunaDB only needs one round of consensus. You'll learn how consistency is managed in FaunaDB and analyze its architectural advantages over Google Spanner and Spanner derivatives such as CockroachDB. # SPEAKER BIO: Chris is a cofounder of Couchbase and architect of Couchbase Mobile. He holds a bachelor’s degree in philosophy from Reed College, and is an O'Reilly technical book author. He leads Fauna's developer community.

1) 7 Principles of Productive Developers 2) Cloud Native J2EE with Istio

Our feature speaker for this meeting is Sebastian Daschner, a Lead Java Developer Advocate for IBM and esteemed Java Champion. He will be giving the following two presentations: --- PART 1 --- TITLE: 7 Principles of Productive Software Developers ABSTRACT: When working as a software developer, as well as in any other job, it’s important to be productive and to get things done. You want to focus on what adds value, increase your development speed, and cut out as many of the cumbersome, boring and repetitive tasks as possible. This session shows seven principles how to accomplish the goal of being more effective and efficient as a Java developer. These principles include technical as well as self-organizational aspects. We’ll see how to implement them, especially how we can get the most out of our tools, why the invention of the mouse was a setback in productivity, and which mindsets to follow. This talk is not limited to specific tools or technologies yet it’ll provide examples and experiences, and it is brought to you by a German — from the country of efficiency. --- PART 2 --- TITLE: Cloud Native, Service-Meshed Java Enterprise With Istio ABSTRACT: In enterprise software, we see more and more of the cloud native technologies, especially container orchestration and service meshes, emerging and slowly taking over the market. Developers are facing the challenge which technology to choose to implement microservices for a cloud native setting. Java Enterprise has been used for software solutions for a long time and its APIs are well-established in the ecosystem. However, is it possible to develop cloud native, service-meshed Java Enterprise applications that fulfill concerns such as scalability, resiliency, and telemetry — in an effective, manageable way? This session shows how to implement service-meshed applications using Java EE 8 and MicroProfile. We will develop a mesh of microservices, managed by Kubernetes and Istio. We’ll see why especially the Java Enterprise approach fits the concepts behind container orchestration and service meshes well. The session also includes how to integrate the required cross-cutting concerns, such as monitoring, tracing, or resiliency into our applications, where developers have to actively integrate technology themselves and where the platform support us. Especially the cooperation between Java EE and MicroProfile provides a potent technology. All of the time will be spent live-coding while explaining the concepts and solutions. SPEAKER: Sebastian Daschner Lead Java Developer Advocate for IBM and renowned Java Champion https://www.sebastian-daschner.com/

Deploying Kafka Streams Applications with Docker and Kubernetes

All things change constantly, and we need to get on board with streams! Moreover, dealing with constantly changing data at low latency is pretty hard. It doesn’t need to be that way. Kafka Streams, Apache Kafka’s stream processing library, allows developers to build sophisticated stateful stream processing applications which you can deploy in an environment of your choice. Kafka Streams is not only scalable but fully elastic allowing for dynamic scale-in and scale-out as the library handles state migration transparently in the background. By running Kafka Streams applications on Kubernetes, you can use Kubernetes powerful control plane to standardize and simplify the application management—from deployment to dynamic scaling. In this talk, Viktor explains the essentials of dynamic scaling and state migration in Kafka Streams. You will see a live demo of how a Kafka Streams application can run in a Docker container and the dynamic scaling of an application running in Kubernetes. SPEAKER: Viktor Gamov is a Developer Advocate at Confluent, the company that makes a streaming platform based on Apache Kafka. Working in the field, Viktor Gamov developed comprehensive expertise in building enterprise application architectures using open source technologies. He enjoys helping different organizations design and develop low latency, scalable and highly available distributed systems. Back in his consultancy days, he co-authored O’Reilly’s «Enterprise Web Development.» He is a professional conference speaker on distributed systems, Java, and JavaScript topics, and is regular on events including JavaOne, Devoxx, OSCON, QCon, and others (http://lanyrd.com/gamussa). He blogs at http://gamov.io and produces the podcasts Razbor Poletov (in Russian) and co-hosts DevRelRad.io. Follow Viktor on Twitter @gamussa, where he posts there about gym life, food, open source, and, of course, Kafka and Confluent!

Past events (32)

PJUG Holiday cheers

Base Camp Brewing Company

Photos (30)