org.apache.hadoop.util

Interface ServicePlugin

All Superinterfaces:

AutoCloseable, Closeable

@InterfaceAudience.Private
@InterfaceStability.Unstable
public interface ServicePlugin
extends Closeable

Service plug-in interface. Service plug-ins may be used to expose functionality of datanodes or namenodes using arbitrary RPC protocols. Plug-ins are instantiated by the service instance, and are notified of service life-cycle events using the methods defined by this class. Service plug-ins are started after the service instance is started, and stopped before the service instance is stopped.

Method Summary

Methods

Modifier and Type	Method and Description
void	start(Object service) This method is invoked when the service instance has been started.
void	stop() This method is invoked when the service instance is about to be shut down.

Methods inherited from interface java.io.Closeable

close

Method Detail

start

void start(Object service)

This method is invoked when the service instance has been started.

Parameters:

service - The service instance invoking this method

stop

void stop()

This method is invoked when the service instance is about to be shut down.