ApplicationAvailability Type — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/availability/ApplicationAvailability.java lines 35–83

public interface ApplicationAvailability {

	/**
	 * Return the {@link LivenessState} of the application.
	 * @return the liveness state
	 */
	default LivenessState getLivenessState() {
		return getState(LivenessState.class, LivenessState.BROKEN);
	}

	/**
	 * Return the {@link ReadinessState} of the application.
	 * @return the readiness state
	 */
	default ReadinessState getReadinessState() {
		return getState(ReadinessState.class, ReadinessState.REFUSING_TRAFFIC);
	}

	/**
	 * Return {@link AvailabilityState} information for the application.
	 * @param <S> the state type
	 * @param stateType the state type
	 * @param defaultState the default state to return if no event of the given type has
	 * been published yet (must not be {@code null}).
	 * @return the readiness state
	 * @see #getState(Class)
	 */
	<S extends AvailabilityState> S getState(Class<S> stateType, S defaultState);

	/**
	 * Return {@link AvailabilityState} information for the application.
	 * @param <S> the state type
	 * @param stateType the state type
	 * @return the readiness state or {@code null} if no event of the given type has been
	 * published yet
	 * @see #getState(Class, AvailabilityState)
	 */
	<S extends AvailabilityState> @Nullable S getState(Class<S> stateType);

	/**
	 * Return the last {@link AvailabilityChangeEvent} received for a given state type.
	 * @param <S> the state type
	 * @param stateType the state type
	 * @return the readiness state or {@code null} if no event of the given type has been
	 * published yet
	 */
	<S extends AvailabilityState> @Nullable AvailabilityChangeEvent<S> getLastChangeEvent(Class<S> stateType);

}