micronaut-pizza-gen

Random Pizza Generator

Description

This demo consists of the following Micronaut projects:

• pizza-generator is a standard Micronaut app with the Kafka feature.

• sauce-service is Micronaut Messaging app with Kafka.

• cheese-service is Micronaut Messaging app with Kafka.

• meat-service is Micronaut Messaging app with Kafka.

• veggie-service is Micronaut Messaging app with Kafka.

The demo was built using Confluent Cloud, the Cloud-native service for Apache Kafka. If you don’t have an account on Confluent Cloud, you can set that up [here](https://www.confluent.io/confluent-cloud).

Building the demo

Each of the five projects contain the Gradle Wrapper. To build from the root directory of a project run ./gradlew build. To execute the application run ./gradlew run.

Running the demo

Before running this demo, you will need to update the src/main/resources/application.yml file in each project. Replace all the fields marked with {{ }} using values from your Confluent Cloud cluster and schema registry. Also, you will need to create 5 topics in Confluent Cloud. They can each have 1 partion (or more if you so desire): pizza, pizza-with-sauce, pizza-with-cheese, pizza-with-meat, and pizza-with-veggies.

Once all five services are up and running, you can issue the following curl command to send an order for 3 random pizzas. curl -H "Content-Type: application/json" --request POST -d '{"count":5}' http://localhost:8080/order

This will trigger a series of events which will result in a completed pizza order with the requested pizzas, and it will return a UUID of that pizza order.

To see your pizzas in all their hot, delicious glory, run the following curl command using the UUID returned from the first call.

curl http://localhost:8080/order/{{pizza-order-UUID}} | jq

Note: jq is optional, but very helpful. More info at https://stedolan.github.io/jq/

When you are done working with this demo project, you can delete these topics to avoid additional charges.

Related Documentation that might be helpful

Confluent Cloud

[Quik-start Guide](https://docs.confluent.io/cloud/current/get-started/index.html)

Micronaut 2.4.0 Documentation

• [User Guide](https://docs.micronaut.io/2.4.0/guide/index.html)

• [API Reference](https://docs.micronaut.io/2.4.0/api/index.html)

• [Configuration Reference](https://docs.micronaut.io/2.4.0/guide/configurationreference.html)

• [Micronaut Guides](https://guides.micronaut.io/index.html) ---

Feature http-client documentation

• [Micronaut HTTP Client documentation](https://docs.micronaut.io/latest/guide/index.html#httpClient)

Feature kafka documentation

• [Micronaut Kafka Messaging documentation](https://micronaut-projects.github.io/micronaut-kafka/latest/guide/index.html)