org.springframework.context

Interface Lifecycle

All Known Subinterfaces:

ConfigurableApplicationContext, LifecycleProcessor, SmartLifecycle

All Known Implementing Classes:

AbstractApplicationContext, AbstractRefreshableApplicationContext, AbstractRefreshableConfigApplicationContext, AbstractXmlApplicationContext, AnnotationConfigApplicationContext, ClassPathXmlApplicationContext, DefaultLifecycleProcessor, FileSystemXmlApplicationContext, GenericApplicationContext, GenericXmlApplicationContext, StaticApplicationContext

public interface Lifecycle

A common interface defining methods for start/stop lifecycle control. The typical use case for this is to control asynchronous processing. NOTE: This interface does not imply specific auto-startup semantics. Consider implementing SmartLifecycle for that purpose.

Can be implemented by both components (typically a Spring bean defined in a Spring context) and containers (typically a Spring ApplicationContext itself). Containers will propagate start/stop signals to all components that apply within each container, e.g. for a stop/restart scenario at runtime.

Can be used for direct invocations or for management operations via JMX. In the latter case, the MBeanExporter will typically be defined with an InterfaceBasedMBeanInfoAssembler, restricting the visibility of activity-controlled components to the Lifecycle interface.

Note that the Lifecycle interface is only supported on top-level singleton beans. On any other component, the Lifecycle interface will remain undetected and hence ignored. Also, note that the extended SmartLifecycle interface provides integration with the application context's startup and shutdown phases.

Since:

2.0

Author:

Juergen Hoeller

See Also:

SmartLifecycle, ConfigurableApplicationContext, org.springframework.jms.listener.AbstractMessageListenerContainer, org.springframework.scheduling.quartz.SchedulerFactoryBean

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isRunning() Check whether this component is currently running.
void	start() Start this component.
void	stop() Stop this component, typically in a synchronous fashion, such that the component is fully stopped upon return of this method.

Method Detail

start

void start()

Start this component. Should not throw an exception if the component is already running.

In the case of a container, this will propagate the start signal to all components that apply.

See Also:

SmartLifecycle.isAutoStartup()

stop

void stop()

Stop this component, typically in a synchronous fashion, such that the component is fully stopped upon return of this method. Consider implementing SmartLifecycle and its stop(Runnable) variant in cases where asynchronous stop behavior is necessary.

Should not throw an exception if the component isn't started yet.

In the case of a container, this will propagate the stop signal to all components that apply.

See Also:

SmartLifecycle.stop(Runnable)

isRunning

boolean isRunning()

Check whether this component is currently running.

In the case of a container, this will return true only if all components that apply are currently running.

Returns:

whether the component is currently running