https://github.com/evanshortiss/rhmi-summit-2020-quarkus-kafka

A Quarkus application that retrieves transactions in JSON format from Kafka and exposes them to a web application
https://github.com/evanshortiss/rhmi-summit-2020-quarkus-kafka

java kafka quarkus

Last synced: 2 days ago
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A Quarkus application that retrieves transactions in JSON format from Kafka and exposes them to a web application

• Host: GitHub
• URL: https://github.com/evanshortiss/rhmi-summit-2020-quarkus-kafka
• Owner: evanshortiss
• Created: 2020-03-16T23:15:05.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-07-04T21:14:43.000Z (over 4 years ago)
• Last Synced: 2024-12-11T19:07:34.270Z (about 2 months ago)
• Topics: java, kafka, quarkus
• Language: HTML
• Size: 68.4 KB
• Stars: 0
• Watchers: 2
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
Quarkus Kafka Quickstart

========================

This project illustrates how you can interact with Apache Kafka using MicroProfile Reactive Messaging.

## Kafka Cluster

First you need a Kafka cluster. You can follow the instructions from the [Apache Kafka web site](https://kafka.apache.org/quickstart) or run `docker-compose up` if you have docker installed on your machine.

Another application should write JSON transaction objects in the following format to a `transactions` topic:

```

{

    "id": "0d64e882-a59b-43d7-a468-89c122fd37ee",

    "givenname": "Jane",

    "surname": "Doe",

    "zip": "47420-7769",

    "amount": "378.00",

    "timestamp": "2020-03-06T07:33:33.796Z"

}

```

## Start this Quarkus Application

The application can be started using:

```bash

mvn quarkus:dev

```

Then, open your browser to `http://localhost:8080/index.html`, and you should see transactions rendered in a table.

## Anatomy

In addition to the `index.html` page, the application is composed by 3 components:

* `TransactionConverter` - on the consuming side, the `TransactionConverter` receives the Kafka message and convert the Transaction.

The result is sent to an in-memory stream of data

* `TransactionResource`  - the `TransactionResource` retrieves the in-memory stream of data in which the converted Transactions are sent and send these Transactions to the browser using Server-Sent Events.

The interaction with Kafka is managed by MicroProfile Reactive Messaging.

The configuration is located in the application configuration.

## Running in Native Mode

You can compile the application into a native binary using:

`mvn clean package -Pnative`

and run with:

`./target/kafka-quickstart-1.0-SNAPSHOT-runner`