bedservice's Introduction

Bed Service (Event sourcing example)

Pre-requisites

Start zookeeper and kafka broker by executing the following commands from kafka directory (in two separate terminals)
```
bin/zookeeper-server-start.sh config/zookeeper.properties
```
```
bin/kafka-server-start.sh config/server.properties
```
Build the application by running ./gradlew clean build from inside the cloned repository
Run the application by running java -jar build/libs/Bedservice-0.0.1-SNAPSHOT.jar
Navigate to the URL localhost:8080/beds and verify that it returns an empty collection

Add a bed by running the following at a terminal window (you can also use postman)

curl -X POST -H "Content-Type: application/json" --data '{"id":"1234","location":"first floor general ward"}' "http://localhost:8080/create

Navigate to the URL localhost:8080/beds and verify that it returns the bed that you just created with status Available
Add a few more beds
Book a bed by going to the kafka directory and executing
```
bin/kafka-console-producer.sh \
--broker-list localhost:9092 \
--topic bedRequestTopic \
--property "parse.key=true" \
--property "key.separator=:"
```
and then entering 1234:{"aggregateId": "1234", "occupantId":"XYZ", "type":"bookBed"} at the prompt
Navigate to the URL localhost:8080/beds and verify that the status of the corresponding bed has changed to Booked.
Verify that attempting to book the same bed again logs an error in the application console.
In case you want to see the events getting published to the kafka topic, execute the following command from the kafka directory
```
bin/kafka-console-consumer.sh --topic bedEvents --bootstrap-server localhost:9092 --property print.key=true --from-beginning
```