KeepAlive class final

A lifecycle-aware component that keeps the Dart VM alive as long as the ApplicationContext is running.

This is useful for command-line or server-based JetLeaf applications that would otherwise terminate after context initialization.

The keep-alive mechanism listens to ApplicationContextEvents and starts an internal blocking thread on ContextRefreshedEvent, and releases it on ContextClosedEvent.

Example

void main() {
  final context = JetLeaf.run();
  context.addApplicationListener(KeepAlive());
}
Implemented types

Constructors

KeepAlive()
A lifecycle-aware component that keeps the Dart VM alive as long as the ApplicationContext is running.

Properties

completer ↔ Completer<void>
Internal completer used to block the thread until shutdown.
getter/setter pair
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
onApplicationEvent(ApplicationContextEvent event) → void
Handle an application event of type E.
override
startKeepAliveThread() → void
Starts the keep-alive thread by awaiting an uncompleted Completer.
stopKeepAliveThread() → void
Stops the keep-alive thread, allowing the application to shut down.
supportsEventOf(ApplicationEvent event) → bool
Returns true if the listener supports the given event.
override
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited