Welcome to Javaforum, September 21:th

Welcome to Javaforum, September 21:th

We are very excited to have Ray Tsang presenting. Ray is well known in the Java Community and has been speaking at conferences all over the world. Hi is also a JavaOne RockStar.

Register to the Meetup

17:00 Registrering & mingel

17:30 Välkommen
Tomas Trolltoft, Ola Petersson & Rikard Thulin, Squeed

17:40 Fast & efficient Microservices with HTTP/2 and GRPC

gRPC is a high performance, open source, general RPC framework that puts mobile and HTTP/2 first. gRPC is based on many years of Google’s experience in building distributed systems – it is designed to be low latency, bandwidth and CPU efficient, to create massively distributed systems that span data centers, as well as power mobile apps, real-time communications, IoT devices and APIs. It’s also interoperable between multiple languages.
But beyond that fact that it’s more efficient than REST, we’ll look into how to use gRPC’s streaming API, where you can establish server-side streaming, client-side streaming, and bidirectional streaming! This allows developers to build sophisticated real-time applications with ease.
Ray offers an overview of gRPC’s capabilities as he live-codes a real-time chatroom, demonstrating how to use gRPC’s streaming API to establish server-side streaming, client-side streaming, and bidirectional streaming. This allows developers to build sophisticated real-time applications with ease. Ray also deep-dives into integration with existing build systems like Maven and Gradle and frameworks like Spring Boot and RxJava.
Topics include:
– Configuring projects to generate gRPC stub code
– Using Protobuffer 3 to define messages and services
– Creating synchronous and asynchronous services with streaming
– Load balancing – Interceptors

Ray Tsang is a Developer Advocate for the Google Cloud Platform. Ray had extensive hands on cross-industry enterprise systems integration delivery and management experiences during his time at Accenture, managed full stack application development, DevOps, and ITOps. Ray specialized in middleware, big data, and PaaS products during his time at Red Hat while contributing to open source projects, such as Infinispan. Aside from technology, Ray enjoys traveling and adventures. Follow Ray on Twitter @saturnism (https://twitter.com/saturnism)

18.25 Paus

18:40 How to find native memory leaks in Java

Normally a memory leak in Java refers to heap memory that cannot be garbage collected for some reason. However, the good old native memory leaks are still with us and they can be as sinister as ever. Native code is probably the most common cause, but sometimes the JVM itself is the culprit. When that is the case, how can you track it down? What tools are there? This session covers a real-world memory leak in the JVM and how it was found and eventually fixed
Presented in English.

Erik Wramner, CodeMint

 

19:25 Service Virtualization – Hoverfly

In most cases our systems interact with external systems that we don’t fully control, which can prove problematic e.g. when running component tests. HoverFly is a tool that acts as an “API-simulator.
Presented in English.

Hans and Niklas are Java developers at Squeed, currently working with backend web development

 

20.02 Optional.of(after event mingle);

For those who still have energy at The Bishop Arms, Järntorget 6

 

Hint: At the same time we run nforum

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