Start this component. <p>Should not throw an exception if the component is already running. <p>In the case of a container, this will propagate the start signal to all components that apply.
Stop this component, typically in a synchronous fashion, such that the component is fully stopped upon return of this method. Consider implementing {@link SmartLifecycle} and its {@code stop(Runnable)} variant when asynchronous stop behavior is necessary. <p>Note that this stop notification is not guaranteed to come before destruction: On regular shutdown, {@code Lifecycle} beans will first receive a stop notification before the general destruction callbacks are being propagated; however, on hot refresh during a context's lifetime or on aborted refresh attempts, a given bean's destroy method will be called without any consideration of stop signals upfront. <p>Should not throw an exception if the component is not running (not started yet). <p>In the case of a container, this will propagate the stop signal to all components that apply. @see SmartLifecycle#stop(Runnable)
Check whether this component is currently running. <p>In the case of a container, this will return {@code true} only if <i>all</i> components that apply are currently running. @return whether the component is currently running