Our event this day started at 14:00 with a watch party of the jChampions conference. Throughout the afternoon, we saw Grace Jansen, Sebastian Daschner, Bazlur Rahman, Paul and Gail Anderson, Emily Jiang and Henri Tremblay present their live on-line talks before welcoming Java Champion Mary Grygleski who has flown in to DubJUG from Chicago, USA to present two great talks for us...

SESSION ABSTRACTS

18:30 Building An Efficient Streaming Data Pipeline with Apache Pulsar and Apache Cassandra

Event Streaming is one of the most important software technologies in the current computing era as it enables systems to process huge volumes of data in blazingly high speed and in real-time. It is indeed the "glue" that can connect data to flow through disparate systems and pipelines that are typical in cloud environments. Leveraging on the Pub/Sub pattern for the message flow, and designed with the cloud in mind, Apache Pulsar has emerged as a powerful distributed messaging and event streaming platform in the recent years. With its flexible and decoupled messaging style, it can integrate and work well with many other modern-day libraries and frameworks.

In this session, we built a modern, efficient streaming data pipeline using Apache Pulsar and Apache Cassandra. Apache Pulsar will handle the data ingest. The external data that comes in will be used for further processing by Pulsar Functions that will in turn reference the tables in Cassandra as the data lookup sources. The results of the transformed data will then be egressed and sent to an Astra DB sink. We also examined to see how we can further optimize the entire processing pipeline.

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Interval Drinks and food courtesy of our wonderful partner network

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20:00: Event Messaging and Streaming with Apache Pulsar

The world is moving at an unprecedented pace and much of it has been powered by the innovations in software and systems. While event handling, messaging, and processing are not necessarily brand new concepts, the recent emergence in hardware such as virtualizations, multi-core processors, and so on, are in fact pushing the envelope in software design and development, elevating it to higher levels of capabilities never seen before. In the case of streaming which very often leverages on the underlying messaging mechanism(s) to bring distributed messaging to higher forms of purposes, such as IoT/IIoT applications, AI/ML data pipelines, or even eCommerce recommendations, event streaming platform has indeed become the “glue” in enabling data to flow through disparate systems in the pipeline and in a very dynamic fashion.

This talk on event streaming was meant for anyone interested in learning about it, and understanding how it fits into the modern software development design and architecture, as well as seeing some of the challenges it faces especially in the Cloud Native environment. We then took a look at an open source platform - Apache Pulsar, which is poised to become the de facto new generation of distributed messaging and streaming platform that will bring joy to developers, and enable systems and applications to be highly responsive with its true real-time capabilities.

Mary's talk was live-streamed as part of the jChampions conference running for four days, Thursday 19th, Friday 20th, Monday 23rd, and Tuesday 24th January. Other presentations are by Andrew Greenstein, Antoine Sabot-Durand, Anton Rodriguez, Barry Burd, Bazlur Rahman, Brian Benz, Cesar Hernandez, Emily Jiang, Gail Anderson, Grace Jansen, Haim Yadid, Heinz Kabutz, Henri Tremblay, Holly Cummins, Ixchel Ruiz, Kirk Pepperdine, Maria Arias de Reyna Dominguez, Mario Fusco, Mohamed Taman, Ondro Mihalyi, Otavio Santana, Paul Anderson, Peter Lawrey, Rafael Del Nero, Rustam Mehmandarov (who's presenting in Dublin on 24th), Sandra Parsick, Sebastian Daschner, and Victor Orozco.

At TechMeetup.space, doors open each day at 13:30 for the jChampions Conference Watch Party. Doors to the live in-person talks open at 18:15.

Find out more https://jchampionsconf.com/

There's Something About Mary!

Mary is a Java Champion and a passionate Streaming Developer Advocate at DataStax, a leading data management company that champions Open Source software and specializes in Big Data, DB-as-a-service, Streaming, and Cloud-Native systems.

She spent 3.5 years previously as a very effective advocate at IBM, focusing on Java, Jakarta EE, OpenJ9, Open Source, Cloud, and Distributed Systems. She transitioned from Unix/C to Java around 2000 and has never looked back since then. She is an active tech community builder outside of her day job, and currently the President of the Chicago Java Users Group (CJUG).

Find Mary on Twitter: @mgrygles

About the Dublin Java User Group

Since 2006, the Dublin Java User Group, aka DubJUG, has been working with the global Java community to amplify technical knowledge for the benefit of Irish based developers and businesses.

DubJUG Partners

Teckro builds mobile first, Cloud based SaaS Technology solutions, used by the global pharmaceutical companies to change how they conduct clinical Trials.

Using the latest technology including Kotlin, Spring Boot, REST APIs, React, ES6, Swift, MySQL, Apache Kafka, Maven, Gradle, Cassandra, Git, Docker, Kubernetes, Helm, Datadog, AWS, Sonar and much more, Teckro’s makes a real difference globally. Quality of life is improved. In the end, lives will be saved.

Website: www.teckro.com/ / Twitter: @teckroofficial

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Stackand.Co have been enriching the professional lives of Java software professionals for over 20 years experience. They have helped many great people elevate their careers, and local companies acquire with the best developers for their teams.

Perhaps they can do the same for you working with companies like this one?

Website: Stackand.Co / Twitter: StackanddotCo

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Liberty IT is part of Liberty Mutual Insurance. We’re the cogs behind the #78 Fortune-ranked company, the key drivers behind their global digital enablement journey, reimagining insurance by delivering an ever more efficient service for our customers.

Website: LibertyIT.co.uk / Twitter: @Liberty_IT

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Oracle Cloud is the industry’s broadest and most integrated public cloud. It offers best-in-class services across software as a service (SaaS), platform as a service (PaaS), and infrastructure as a service (IaaS), and even lets you put Oracle Cloud in your own data centre. Oracle Cloud helps organisations drive innovation and business transformation by increasing business agility, lowering costs, and reducing IT complexity.

Website: Oracle / Twitter: Oracle_UKI

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Version 1 is a trusted technology partner to major domestic and international customers across all industry sectors in the UK and Ireland. Their Java practice has grown to over 120 people over the last few years, and continues to grow. Many of their Java customers use a significant amount of open-source tools and technologies, and therefore Version 1 work with the community to hear other Java success stories, learn more about people’s experiences, and bring in Java experts and champions to get the latest on what’s going on in that space.

Website: Version1.com / Twitter: Version1Tweets

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ViaSat, a global team of fearless innovators finding better ways to develop the ultimate global communications network to impact people's lives anywhere they are—on the ground, in the air or at sea.

Viasat Ireland develops in-flight experience products and platforms for the global aviation industry, pushing the boundaries of what’s possible across the entire travel experience by developing entertainment, operational and connectivity solutions that transform travel for airlines and passengers by enhancing engagement, loyalty and performance.

Website: Careers.Viasat.com / Twitter: @ViasatAviation

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Global Payments Inc makes it easy for business to accept payments online, on mobile and in-app blending global coverage, local expertise and the best possible service to help drive business growth. Headquarted in Atlanta, they have a thriving technology division based on Sir John Rogerson's Quay.

Website: GlobalPaymentsInc.com / Twitter: GlobalPayInc

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Equifax Technology Ireland is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: Equifax.com / Twitter: Equifax

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GuruTeam delivers high end ICT learning, mentoring and consultancy services, in Ireland, the UK and worldwide. Their expert instructors formulate bespoke training to suit their clients and can deliver programmes on or offsite.

Website: GuruTeamIrl.com / Twitter: GuruTeamIreland

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Hazelcast delivers the System of Now™, an in-memory computing platform that empowers Global 2000 enterprises to deliver innovative, low-latency, data-centric applications

Website: Hazelcast.com.com / Twitter: @Hazelcast

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Technology companies like Synchronoss and FINEOS also support our community - find out more about them here.