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

Class DisabledNameserviceStore

java.lang.Object

org.apache.hadoop.hdfs.server.federation.store.RecordStore<R>

org.apache.hadoop.hdfs.server.federation.store.CachedRecordStore<DisabledNameservice>

org.apache.hadoop.hdfs.server.federation.store.DisabledNameserviceStore

All Implemented Interfaces:

StateStoreCache

Direct Known Subclasses:

DisabledNameserviceStoreImpl

@Private
@Evolving
public abstract class DisabledNameserviceStore
extends CachedRecordStore<DisabledNameservice>

State store record to track disabled name services.

Constructor Summary

Constructors

Constructor	Description
DisabledNameserviceStore(StateStoreDriver driver)

Method Summary

Modifier and Type	Method	Description
abstract boolean	disableNameservice(String nsId)	Disable a name service.
abstract boolean	enableNameservice(String nsId)	Enable a name service.
abstract Set<String>	getDisabledNameservices()	Get a list of disabled name services.

Methods inherited from class org.apache.hadoop.hdfs.server.federation.store.CachedRecordStore

getCachedRecords, getCachedRecordsAndTimeStamp, loadCache, overrideExpiredRecord, overrideExpiredRecords

Methods inherited from class org.apache.hadoop.hdfs.server.federation.store.RecordStore

getDriver, getRecordClass, newInstance

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DisabledNameserviceStore

public DisabledNameserviceStore(StateStoreDriver driver)

Method Details

disableNameservice

public abstract boolean disableNameservice(String nsId)
                                    throws IOException

Disable a name service.

Parameters:

nsId - Identifier of the name service.

Returns:

If the name service was successfully disabled.

Throws:

IOException - If the state store could not be queried.

enableNameservice

public abstract boolean enableNameservice(String nsId)
                                   throws IOException

Enable a name service.

Parameters:

nsId - Identifier of the name service.

Returns:

If the name service was successfully brought back.

Throws:

IOException - If the state store could not be queried.

getDisabledNameservices

public abstract Set<String> getDisabledNameservices()
                                             throws IOException

Get a list of disabled name services.

Returns:

List of disabled name services.

Throws:

IOException - If the state store could not be queried.