org.lsst.ccs.framework

Interface HasLifecycle

All Known Subinterfaces:

Configurable

All Known Implementing Classes:

ConfigurableComponent, Module

public interface HasLifecycle

Interface to be implemented by all ComponentNode objects that wish to be invoked during one of the following life-cycle phases:

• init
• start
• post-start
• shutdown

Author:

The LSST CCS Team

Method Summary

Modifier and Type	Method and Description
default void	init() This method is called from the top level Subsystem during the initialization phase.
default void	postStart() once all hardware components have been started this method is invoked.
default void	shutdownNow() This object is ready to perform end of life operations.
default void	start() This method is called from the top level Subsystem when it is being started.

Method Detail

init

default void init()

This method is called from the top level Subsystem during the initialization phase.

start

default void start()

This method is called from the top level Subsystem when it is being started.

postStart

default void postStart()
                throws HardwareException

once all hardware components have been started this method is invoked. it notifies all component that now the subsystem is going to end initialization phase that could be the place to start ticks (module) or to "home" hardwares (that's the reason why this method throws a HardwareException) TO-DO: Does this really need to throw a HardwareException? Don't we have other Hardware specific interfaces?

Throws:

HardwareException

shutdownNow

default void shutdownNow()

This object is ready to perform end of life operations. (hardwares have been stopped before by stop command) TO-DO: Who stopped the hardware? See comments in postStart() method. Make sure the hardware interfaces are properly specified.