ApplicationEvent constructor

const ApplicationEvent(
  1. Object source, [
  2. DateTime? timestamp
])

A base class for application-specific events within the JetLeaf framework.

Extends EventObject and allows capturing the event creation time using either the system clock or a custom clock function.

Subclasses of ApplicationEvent are used to represent meaningful events in the lifecycle of an application, such as context initialization, refresh, shutdown, etc.

Example

class ContextRefreshedEvent extends ApplicationEvent {
  ContextRefreshedEvent(Object source) : super(source);
}

final event = ContextRefreshedEvent(appContext);
print(event.source); // appContext
print(event.timestamp); // time of creation

Creates a new ApplicationEvent with the system clock as timestamp.

Uses DateTime.now() by default.

Implementation

/// Creates a new [ApplicationEvent] with the system clock as timestamp.
///
/// Uses `DateTime.now()` by default.
const ApplicationEvent(super.source, [super.timestamp]);