Junio 2022: Demistifying "Event" related software concepts and methodologies

No matter exactly what type of software you are building, at least a few terms starting with the word "event" must have tried to invade your professional space. "Event-driven" has already evolved to the level of a magical buzzword in IT marketing and sales activities.

But the tech terms list is much longer. It includes "event streaming","event storming","event sourcing","event store", "event modeling","event notification","event-carried state transfer",...

Getting dizzy already? Don't worry. Many developers feel this way.

This talk is an “event-dizziness” cure. It'll walk you through the entire "event land" and explain what is what. It’ll discuss the origins, intention, and applicability of each term. So the next time you face the "event-driven" label, you can ask the right questions and make educated choices.

About the Speaker: Milen Dyankov.

Milen is a Developer Advocate at AxonIQ on a mission to help fellow Java developers around the globe design and build clean, modular, and future-proof software! After more than 20 years of developing, designing, and consulting on various solutions for leading European companies, he currently spends most of his time supporting communities and organizations, speaking at conferences all over the world and researching his favorite topics around Java modularity, μservices, distributed systems architecture, and software craftsmanship.

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Madrid-GUG Junio 2022: Tomando el pulso a la ciudad

Volvemos con nuestro primer meetup presencial desde Febrero de 2020. Nuestro compañero Jorge Aguilera (@pvidasoftware) nos va a hablar sobre Kafka, Micronaut y Okteto en una charla muy interesante y práctica.

Tomando el pulso a la ciudad: Jugando con Micronaut, Kafka y Okteto para analizar en tiempo real el estado del tráfico de Madrid.

El Ayuntamiento de Madrid dispone de un OpenData, que se refresca cada 5 minutos, con las mediciones del estado del tráfico en las calles (cerca de 4000 puntos). Por otra parte existen cerca de 500 cámaras repartidas por la ciudad accesibles que se actualizan también en tiempo casi real.

En esta charla vamos a desarrollarnos un sistema tal que:
- descargue en tiempo real las mediciones
- mantenga un estado de cada una de ellas de los últimos 20-30 minutos
- si detecta saturación en algún punto, capturará las cámaras cercanas y mandará una notificación a un canal.

Para ello crearemos una serie de servicios Micronaut que hablarán entre ellos de forma desacoplada usando Kafka y todos ellos en un cluster Kubernetes.

La idea es desarrollarlo en directo desde cero y desplegarlo en producción en Okteto (así que si algo puede fallar, no lo dudes, lo hará)

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Código: https://puravida-software.gitlab.io/pulso-madrid/
Documentacion: https://gitlab.com/puravida-software/pulso-madrid
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Enlace al meetup: https://www.meetup.com/es-ES/madrid-gug/events/285795623/

Madrid-GUG Abril 2022 (Online): Groovy 4 Update

We have a new guest in our group. This time VP Apache Groovy and Chair of the Apache Groovy PMC, Dr Paul King (@paulk_asert) will talk (in English) about "Groovy 4 Update":

This talk looks at the latest features in Groovy 4. Groovy 4 builds on the reworked parrot parser introduced in Groovy 3 adding records, sealed classes, switch expressions and a language integrated query mechanism. In addition, numerous large scale refactoring efforts streamline the Groovy codebase, there are new built-in type checkers and macro methods, a JavaShell, design-by-contract support, TOML parsing and building support, and alignment of numerous features with Java up to JDK 17.

About Paul: Dr Paul King is a JavaOne Rockstar who has been contributing to open source projects for over 30 years. He is an active committer on numerous projects including Groovy, GPars and Gradle. Paul speaks at international conferences, publishes in software magazines and journals, and is a co-author of Manning’s best-seller: Groovy in Action, 2nd Edition. He is also VP Apache Groovy and Chair of the Apache Groovy PMC.

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Enlace al meetup: https://www.meetup.com/es-ES/madrid-gug/events/285134197/

Madrid-GUG Diciembre 2021 (Online): What’s new in Grails 5

We have a new guest in our group. This time Grails Product Lead, Puneet Behl (@puneetbhl) will talk (in English) about "What's new in Grails 5":

In this session, we will highlight what’s new in Grails 5, Micronaut Integration, Groovy 3, and the current developments around Grails framework. - What’s new in Grails 5 - Differences between Grails 4 and Grails 5 - Key upgrades and new features - Publishing Grails Plugins - What Micronaut integration means for you - What to expect from the upgrade effort going forward

What’s new in grails framework 5? from Puneet Behl

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Enlace al meetup: https://www.meetup.com/es-ES/madrid-gug/events/282444513/

Madrid-GUG Noviembre 2021 (Online): Micronaut + AOP: A Love Story

We have a new guest in our group. This time Micronaut Product Lead at OCI, James Kleeh (@Schlogen) will talk (in English) about Micronaut framework and AOP:

Micronaut framework uses Aspect Oriented Programming to make the lives of developers easier by allowing a simple interface to query a database, send a message with Kafka, send an HTTP request, and much more. Join me to see how AOP in Micronaut framework works, what use cases it excels at, and how you can leverage it to write custom integrations with other technologies.

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Enlace al meetup: https://www.meetup.com/es-ES/madrid-gug/events/281838613/

Madrid-GUG Octubre 2021: Micronaut "Ask Me Anything"

Volvemos a la carga con un nuevo formato. Vamos a organizar un Ask Me Anything (AMA) con los committers de Micronaut Iván López (@ilopmar) y Sergio del Amo (@sdelamo). El maestro de ceremonias será Jorge Aguilera (@jagedn).

Queremos que puedas preguntar todo aquello que siempre te ha pasado por la cabeza pero que nunca te has atrevido: cómo se organiza el equipo, cómo se prioriza, cómo se deciden las issues, quién trabaja en qué, cómo es trabajar en un proyecto opensource, cotilleos, herramientas,... ¡Lo que quieras!

Vamos a emitirlo en directo en nuestro canal de Youtube y podréis hacer las preguntas directamente en el chat.

Madrid-GUG Abril 2021 (Online): Try the Monad!

 In this online talk Luis Muñiz (@emfanitek) will talk Try the Monad!

Introducing something like the Vavr Try Monad in your backend API has consequences throughout all the layers of your application. This talk looks at motivation issues, and solutions to adopting this style.

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Try the monad! from Luis Muniz

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Enlace al meetup: https://www.meetup.com/es-ES/madrid-gug/events/277438499/