Class AvailabilityChangeEvent<S extends AvailabilityState>

java.lang.Object

java.util.EventObject

org.springframework.context.ApplicationEvent

org.springframework.context.PayloadApplicationEvent<S>

org.springframework.boot.availability.AvailabilityChangeEvent<S>

Type Parameters:

S - the availability state type

All Implemented Interfaces:

Serializable, ResolvableTypeProvider

public class AvailabilityChangeEvent<S extends AvailabilityState>
extends PayloadApplicationEvent<S>

ApplicationEvent sent when the AvailabilityState of the application changes.

Any application component can send such events to update the state of the application.

Since:

2.3.0

Author:

Brian Clozel, Phillip Webb

See Also:

• Serialized Form

Field Summary

Fields inherited from class EventObject

source

Constructor Summary

Constructors

Constructor	Description
AvailabilityChangeEvent(Object source, S state)	Create a new AvailabilityChangeEvent instance.

Method Summary

Modifier and Type	Method	Description
ResolvableType	getResolvableType()
S	getState()	Return the changed availability state.
static <S extends AvailabilityState> void	publish(ApplicationContext context, S state)	Convenience method that can be used to publish an AvailabilityChangeEvent to the given application context.
static <S extends AvailabilityState> void	publish(ApplicationEventPublisher publisher, Object source, S state)	Convenience method that can be used to publish an AvailabilityChangeEvent to the given application context.

Methods inherited from class PayloadApplicationEvent

getPayload

Methods inherited from class ApplicationEvent

getTimestamp

Methods inherited from class EventObject

getSource, toString

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

AvailabilityChangeEvent

public AvailabilityChangeEvent(Object source,
 S state)

Create a new AvailabilityChangeEvent instance.

Parameters:

source - the source of the event

state - the availability state (never null)

Method Details

getState

public S getState()

Return the changed availability state.

Returns:

the availability state

getResolvableType

public ResolvableType getResolvableType()

Specified by:

getResolvableType in interface ResolvableTypeProvider

Overrides:

getResolvableType in class PayloadApplicationEvent<S extends AvailabilityState>

publish

public static <S extends AvailabilityState> void publish(ApplicationContext context,
 S state)

Convenience method that can be used to publish an AvailabilityChangeEvent to the given application context.

Type Parameters:

S - the availability state type

Parameters:

context - the context used to publish the event

state - the changed availability state

publish

public static <S extends AvailabilityState> void publish(ApplicationEventPublisher publisher,
 Object source,
 S state)

Convenience method that can be used to publish an AvailabilityChangeEvent to the given application context.

Type Parameters:

S - the availability state type

Parameters:

publisher - the publisher used to publish the event

source - the source of the event

state - the changed availability state