Custom Modules - WunderGraph

Available Hooks

The Cosmo Streams system provides three main hook interfaces that you can implement with Custom Modules:

• SubscriptionOnCreateHandler: Called before a subscription is registered, allows modifying the event configuration (experimental)
• SubscriptionOnStartHandler: Called when a client subscribes
• OnReceiveEventHandler: Called when events are received from a message broker
• OnPublishEventHandler: Called when events are going to be sent to a message broker