Package org.apache.hadoop.hdfs.server.federation.router

Interface RouterStateManager

All Known Subinterfaces:

RouterAdminProtocol

All Known Implementing Classes:

RouterAdminProtocolTranslatorPB, RouterAdminServer

public interface RouterStateManager

Interface of managing the Router state.

Method Summary

Modifier and Type	Method	Description
EnterSafeModeResponse	enterSafeMode(EnterSafeModeRequest request)	Enter safe mode and change Router state to RouterServiceState#SAFEMODE.
GetSafeModeResponse	getSafeMode(GetSafeModeRequest request)	Verify if current Router state is safe mode.
LeaveSafeModeResponse	leaveSafeMode(LeaveSafeModeRequest request)	Leave safe mode and change Router state to RouterServiceState#RUNNING.

Method Detail

enterSafeMode

EnterSafeModeResponse enterSafeMode(EnterSafeModeRequest request)
                             throws java.io.IOException

Enter safe mode and change Router state to RouterServiceState#SAFEMODE.

Parameters:

request - Request to enter safe mode.

Returns:

Response to enter safe mode.

Throws:

java.io.IOException - If it cannot perform the operation.

leaveSafeMode

LeaveSafeModeResponse leaveSafeMode(LeaveSafeModeRequest request)
                             throws java.io.IOException

Leave safe mode and change Router state to RouterServiceState#RUNNING.

Parameters:

request - Request to leave safe mode.

Returns:

Response to leave safe mode.

Throws:

java.io.IOException - If it cannot perform the operation.

getSafeMode

GetSafeModeResponse getSafeMode(GetSafeModeRequest request)
                         throws java.io.IOException

Verify if current Router state is safe mode.

Parameters:

request - Request to get the safe mode state.

Returns:

Response to get the safe mode state.

Throws:

java.io.IOException - If it cannot perform the operation.