This repository contains examples that illustrates the three Event Driven Architecture flavours presented at Callista Developer's Conference 2019: Event Notification, Event-Carried State Transfer and Event Sourcing.
The examples gradually evolve an initial, simple micro service application portfolio into using Event Notification, Event-Carried State Transfer and Event Sourcing. There are git tags for each stage in the evolution:
- initial
- eventNotification
- choreography
- eventCarriedStateTransfer
- eventSourcing
In order to build and run the examples, Maven, a Java8 JDK and Docker are required. The environment variable DOCKER_HOST_IP must be set to the ip address of your DOCKER_HOST (typically localhost when running native docker om Linux, Mac or Windows, or the ip address of the VirtualBox Docker host when running docker-toolbox on Mac or Windows):
export DOCKER_HOST_IP=localhost
Run the following command to build Docker images for the involved components:
mvn clean install
Run the following command to start the docker component portfolio:
docker-compose up -d
To see the console output for the components, run the following command in another terminal:
docker-compose logs -f
Then create a customer into the Customer component:
curl -i -X POST -H "Content-Type:application/json" -d "{ \"firstname\" \
: \"Björn\", \"lastname\" : \"Beskow\", \"street\" \
: \"Norra Saltsjönäsvägen 11\", \"zip\" : \"421 66\", \"city\" \
: \"Göteborg\", \"email\" : \"bb@callistaenterprise.se\" }" \
http://$DOCKER_HOST_IP:8083/customer
Then place an order into the Order component, using the customer email previously created:
curl -i -X POST -H "Content-Type:application/json" -d "{ \"customer\" \
: \"bb@callistaenterprise.se\", \"content\" : \"Event Driven Architecture\" }" \
http://$DOCKER_HOST_IP:8080/order
Enjoy!