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

Class RouterStoreImpl

java.lang.Object

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

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

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

org.apache.hadoop.hdfs.server.federation.store.impl.RouterStoreImpl

All Implemented Interfaces:

StateStoreCache

@Private
@Evolving
public class RouterStoreImpl
extends RouterStore

Implementation of the RouterStore state store API.

Constructor Summary

Constructors

Constructor	Description
RouterStoreImpl(StateStoreDriver driver)

Method Summary

Modifier and Type	Method	Description
GetRouterRegistrationResponse	getRouterRegistration(GetRouterRegistrationRequest request)	Fetches the current router state object.
GetRouterRegistrationsResponse	getRouterRegistrations(GetRouterRegistrationsRequest request)	Fetches all router status objects.
RouterHeartbeatResponse	routerHeartbeat(RouterHeartbeatRequest request)	Update the state of this router in the State Store.

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

RouterStoreImpl

public RouterStoreImpl(StateStoreDriver driver)

Method Details

getRouterRegistration

public GetRouterRegistrationResponse getRouterRegistration(GetRouterRegistrationRequest request)
                                                    throws IOException

Description copied from class: RouterStore

Fetches the current router state object.

Specified by:

getRouterRegistration in class RouterStore

Parameters:

request - Fully populated request object.

Returns:

The matching router record or null if none exists.

Throws:

IOException - Throws exception if unable to query the data store or if more than one matching record is found.

getRouterRegistrations

public GetRouterRegistrationsResponse getRouterRegistrations(GetRouterRegistrationsRequest request)
                                                      throws IOException

Description copied from class: RouterStore

Fetches all router status objects.

Specified by:

getRouterRegistrations in class RouterStore

Parameters:

request - Fully populated request object.

Returns:

List of Router records present in the data store.

Throws:

IOException - Throws exception if unable to query the data store

routerHeartbeat

public RouterHeartbeatResponse routerHeartbeat(RouterHeartbeatRequest request)
                                        throws IOException

Description copied from class: RouterStore

Update the state of this router in the State Store.

Specified by:

routerHeartbeat in class RouterStore

Parameters:

request - Fully populated request object.

Returns:

True if the update was successfully recorded, false otherwise.

Throws:

IOException - Throws exception if unable to query the data store