PRODUCTION READY VERT.XBerlin | 07.04.2023

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TABLE OF CONTENTS

1.Introduction

2.The Beginning

3.What is Vert.x?

4.How to start?

5.Infrastructure as code

6.Vert.x module system

7.Integration with messaging system

8.Kafka module

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INTRODUCTION ZANOX

Europe‘s leading performance advertising network

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THE BEGINNING

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Java Magazin 04.14: Vert.x im UnternehmenseinsatzEntwicklung und Betrieb von asynchronen Applikationen mit Vert.x in der Praxis

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THE BEGINNING

●New request processing-system for Zanox

●Requirements are pretty high (not negotiable):●Low latency●High throughput●Scalable●Resilient●Responsive●Event-Driven●Fast

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THE BEGINNING

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“Vert.x is a lightweight, high performance application platform for the JVM that's designed for modern mobile, web, and enterprise applications.”

Vert.x

WHAT IS VERT.X?

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WHAT IS VERT.X?

Polyglot

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WHAT IS A VERTICLE?

●Classes with an own Classloader

●operates Single Threaded

●executed by an Event Loop

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Event Loop Pool

Event Bus

V V V W W W

TAKE A LOOK INSIDE

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WHAT‘S DEEP INSIDE?

●Build on top of Netty 4

●Uses Hazelcast for node discovery

●Jackson for JSON

●Java7+

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HOW TO START?

●Prerequisite: JDK 7

●download and unzip file from vertx.io

●put /bin directory to PATH variable

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HOW TO START?

●mvn archetype:generate -Dfilter=io.vertx: (do not forget the colon!)

●generates structure for all languages (JS, Ruby, Groovy, Python)

●maven pom is already set with relevant data

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HOW TO START?

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BEST PRACTICES

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BEST PRACTICES

●do not block the loop●put blocking code or extensive computation into

worker verticles●keep the application responsive●stress test as often as possible

●encapsulate common code in modules (more on this later)

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INFRASTRUCTURE AS CODE

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INFRASTRUCTURE AS CODE

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"CHEF IS LIKE A LITTLE SYSTEM ADMIN ROBOT ... YOU TELL IT HOW YOU WANT YOUR SYSTEM CONFIGURED, AND IT WILL DO ALL THE DIRTY WORK.”

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INFRASTRUCTURE AS CODE

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INFRASTRUCTURE AS CODE

Chef Cookbook

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INFRASTRUCTURE AS CODE

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VERT.X MODULE SYSTEM

●Vert.x has a powerful module system. ●Package your Vert.x components into modules for

encapsulation and reuse.●The module is a zip file●It can be just plugged in into your application

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VERT.X MODULE SYSTEM

●Share your modules with the community by putting them in Maven Central, any other Maven repository, or in Bintray.

●Advertise your module in the module registry.

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VERT.X MODULE REGISTRY

●Just fill in the form and wait for approval:

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INTEGRATION WITH MESSAGING SYSTEM

●Apache Kafka is a publish-subscribe messaging implemented as a distributed commit log.

●Fast

●Scalable

●Durable

●Distributed

KAFKA MESSAGING SYSTEM

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INTEGRATION WITH MESSAGING SYSTEM

●Topic - categories for feeds of messages

●Producer - publishes messages to topics

●Consumer - subscribes to topics and process the feed of published messages consumers

●Broker - Kafka is run as a cluster comprised of one or more servers each of which is called a broker.

MAIN TERMINOLOGY:

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KAFKA MODULE

●Application sends messages to Kafka module using Vert.x event bus

●Kafka module acts as a producer●Available on Maven Central and Vert.x module registry

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KAFKA MODULE IN MODULE REGISTRY

Open sourced Kafka module in Vert.x’s module registry - http://modulereg.vertx.io/

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USING VERT.X MODULE

First, deploy the module into your application:

container.deployModule("com.zanox.vertx~mod-kafka~1.0.2", config);

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USING KAFKA MODULE

JsonObject config = new JsonObject();

config.putString("kafka-topic", ‘kafka_topic“);

config.putString("metadata.broker.list", “localhost:9092”);

config.putString("request.required.acks", "1");

CONFIGURATION IS A JSON OBJECT:

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METRICS OF VERT.X PROJECT

●On 4 Cores virtual machine we had the following results:●~28 K requests per second without Kafka, with

lookup from Redis●~18 K requests per second with Kafka and lookup

from Redis

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Q & A