Spring Boot service that sends the current time to registered services at the given frequency.

The service exposes three APIs for managing webhook subscriptions:

POST /clocks/subscriptions - register a new subscription for the given URL, with the given frequency. Returns 400 Bad Request if URL is already registered.

Body

{
    "url" : "http://localhost:8081/webhook",
    "frequency" : "PT20S"
}

PUT /clocks/subscriptions - update the frequency of an existing subscription. Returns 400 Bad Request if URL is not registered.

Body

{
    "url" : "http://localhost:8081/webhook",
    "frequency" : "PT20S"
}

DELETE /clocks/subscriptions - deregister a subscription for the given URL. Returns 400 Bad Request if URL is not registered.

Body

{
    "url" : "http://localhost:8081/webhook",
}

Running the application

• Build project with mvn clean install
• Run application with java -jar <path_to_jar>/webhook-0.0.1-SNAPSHOT.jar com.deanhayden.webhook.WebhookApplication

Example cURL for registering a webhook:

curl --location --request POST 'http://localhost:8080/clocks/subscriptions' \
--header 'Content-Type: application/json' \
--data-raw '{
    "url" : "http://localhost:8081/webhook",
    "frequency" : "PT10S"
}'

TODO

• Better exception handling in ClockSubscriptionWebClient
• Testing of threadPoolTaskScheduler task creation and execution
• Better testing of edges cases i.e. validation