event-streaming-demo's Introduction

Pre-requisites

Docker Desktop for Mac/Windows
A mailtrap account for sending mail (or your own SMTP server)
Download the JDBC and File app starters

curl -O http://repo.spring.io/milestone/org/springframework/cloud/stream/app/jdbc-source-kafka/2.1.0.RC1/jdbc-source-kafka-2.1.0.RC1.jar
curl -O http://repo.spring.io/milestone/org/springframework/cloud/stream/app/file-sink-kafka/2.1.0.RC1/file-sink-kafka-2.1.0.RC1.jar

Starting Up

Startup at the end first so that your consumers are consuming before messages arrive

Start Kafka and Postgres DB - in the root project folder is a docker-compose.yml run
```
$ docker-compose up -d
```

Start the file sink

java -jar file-sink-kafka-2.1.0.RC1.jar \
--server.port=0 \
--spring.cloud.stream.bindings.input.destination=order_customers \
--file.mode=APPEND \
--file.directory=output \
--file.name=communications.log

Start the cloudstream dg.demo.cloudstream.Application with these extra program arguments --spring.mail.username=<mailtrap user> --spring.mail.password=<mailtrap password>

If you are using a different mail server edit the application.yml to set settings accordingly.
Start the ordersimulator dg.demo.ordersimulator.Application with the extra program argument --server.port=0 so it runs on a different port than the demo application

Start the JDBC source

java -jar jdbc-source-kafka-2.1.0.RC1.jar \
--server.port=0 \
--spring.cloud.stream.bindings.output.destination=order_customers \
--jdbc.query="select o.order_number,o.customer_email,sa.first_name,last_name,sa.street,sa.city,sa.state,sa.zip from orders o inner join shipping_address sa on o.shipping_address_shipping_address_id = sa.shipping_address_id where o.processed=false" \
--jdbc.update="update orders set processed=true where order_number in (:order_number)" \
--spring.datasource.url=jdbc:postgresql://localhost/postgres \
--spring.datasource.username=postgres \
--spring.datasource.password=mypassword

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