PreDestroy class

Marks a method the container calls when a bean is destroyed: when the context closes for a singleton, when its scope ends for a scoped bean.

Use it to release what the bean holds: flush a buffer, close a file, cancel a timer. The method takes no arguments. It may return a Future, which closeAsync waits for (close logs it and goes on). Prototype beans are not tracked, so their @PreDestroy methods are never called (as in Spring).

@Component()
class Cache {
  @PreDestroy()
  void flush() { /* write entries */ }
}

Spring (Java), the Jakarta annotation:

@Component
class Cache {
  @PreDestroy
  void flush() { ... }
}

Constructors

PreDestroy()

Marks the destroy method.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited