Performance testing Java Applications and Data focused programming in Java

Hi everyone -

We are excited to host an in-person event at Nagarro, Gurgaon, after a long time and hope to be able to see you all and talk about Java.

Agenda:
2:00 - 2:10 pm: Registration
2:10 - 2:20 pm: Welcome and Introductions
2:30 - 3:30 pm: Session on Performance Testing Java Applications
3:30 - 4:30 pm: Session on Data Focused Programming in Java
4:30 - 5:00 pm: Something to eat :-)

By registering for this event, you allow for Delhi JUG to share your name and email address with the security team of Nagarro (required for secured access to the meetup venue).

Following are the session details:

Session 1 details:

Session title: Performance Testing Java Applications

Session Abstract:

Every so often, you’ll read a performance benchmark (of a Java or other application), with bold claims for how well X performs compared to Y. Testing the performance of your Java application is an artform rather than engineering and is a minefield of misconceptions, misunderstanding, and misinformation. In this session, we will review the basics and give you concrete steps to build a robust performance testbed for your application. We will be looking at this from a real-world server-side application point of view, specifically for Java apps. We’ll review common problems and how to avoid them. We’ll cover these topics while building up a performance test and running it live:

Define your goals:
· SLA, latency, throughput, stability
· Test env vs. Production env for testing
· The impact of GC on Java app performance
· Tools for setting up, driving load, and getting perf test results
· Testing application infrastructures like Kafka, Spark, and Cassandra
· Operating system settings, JVM settings, memory sizing, and CPU sizing
· Analyzing perf test results and finding bottlenecks that are both apparent and not obvious

Speaker bio:

Pratik Patel is a software and hardware nerd that loves to build things. He is a Java Champion, AJUG President, conference speaker, tech lead, and never met a programming platform he didn't like, except for Perl.

Session 2 details:

Session title: Data Focused programming with Pattern Matching in Java

Session Description:

Data is at the heart of most applications. For ages, Java developers have been using conditions to determine whether an instance is of a specific type - to extract its components. Though this sounds obvious and harmless, Pattern Matching has revolutionized how you achieve this in your everyday code in a concise and focused way.

Working with its syntax seems simple and straightforward. Pattern Matching can be used with operators like instanceof, and constructs like switch statements and expressions. But, don't let this simplicity deceive you. Its real power lies in understanding the semantics of working with Patterns like Type Patterns, Parenthesized Patterns, Record Patterns and others to write declarative and data-focused code to create powerful, declarative and composable data navigation and processing.

In this live-coded talk, the attendees will learn about the issues with their existing code, create concise and clear data-focused queries, and modify existing code bases to avail benefits of Pattern Matching, Records and Sealed classes.

Speaker bio:

A proud wife, Mala Gupta is an author and a Java Champion. She works as a Java Developer Advocate with JetBrains. She has authored multiple books with Manning, Packt and O'Reilly Publications. She is an international speaker at industry conferences and has over two decades of experience in the software industry. She has been actively supporting Java certification as a path to career advancement.

She co-leads Delhi's Java User Group. A strong supporter of Women in Technology, she drives initiatives of the Women Who Code Delhi chapter to augment the participation of women in tech.

We look forward to seeing you soon.

Delhi JUG Team.