org.apache.accumulo.server.master.state

Class MetaDataStateStore

java.lang.Object

org.apache.accumulo.server.master.state.TabletStateStore

org.apache.accumulo.server.master.state.MetaDataStateStore

All Implemented Interfaces:

Iterable<TabletLocationState>

Direct Known Subclasses:

RootTabletStateStore

public class MetaDataStateStore
extends TabletStateStore

Field Summary

Fields

Modifier and Type	Field and Description
protected ClientContext	context
protected CurrentState	state

Constructor Summary

Constructors

Modifier	Constructor and Description
	MetaDataStateStore(AccumuloServerContext context)
protected	MetaDataStateStore(AccumuloServerContext context, String tableName)
	MetaDataStateStore(ClientContext context, CurrentState state)
protected	MetaDataStateStore(ClientContext context, CurrentState state, String targetTableName)

Method Summary

Modifier and Type	Method and Description
ClosableIterator<TabletLocationState>	iterator() Scan the information about the tablets covered by this store
String	name() Identifying name for this tablet state store.
void	setFutureLocations(Collection<Assignment> assignments) Store the assigned locations in the data store.
void	setLocations(Collection<Assignment> assignments) Tablet servers will update the data store with the location when they bring the tablet online
void	suspend(Collection<TabletLocationState> tablets, Map<TServerInstance,List<org.apache.hadoop.fs.Path>> logsForDeadServers, long suspensionTimestamp) Mark tablets as having no known or future location, but desiring to be returned to their previous tserver.
void	unassign(Collection<TabletLocationState> tablets, Map<TServerInstance,List<org.apache.hadoop.fs.Path>> logsForDeadServers) Mark the tablets as having no known or future location.
void	unsuspend(Collection<TabletLocationState> tablets) Remove a suspension marker for a collection of tablets, moving them to being simply unassigned.

Methods inherited from class org.apache.accumulo.server.master.state.TabletStateStore

getStoreForTablet, setLocation, suspend, unassign

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

context

protected final ClientContext context

state

protected final CurrentState state

Constructor Detail

MetaDataStateStore

protected MetaDataStateStore(ClientContext context,
                             CurrentState state,
                             String targetTableName)

MetaDataStateStore

public MetaDataStateStore(ClientContext context,
                          CurrentState state)

MetaDataStateStore

protected MetaDataStateStore(AccumuloServerContext context,
                             String tableName)

MetaDataStateStore

public MetaDataStateStore(AccumuloServerContext context)

Method Detail

iterator

public ClosableIterator<TabletLocationState> iterator()

Description copied from class: TabletStateStore

Scan the information about the tablets covered by this store

Specified by:

iterator in interface Iterable<TabletLocationState>

Specified by:

iterator in class TabletStateStore

setLocations

public void setLocations(Collection<Assignment> assignments)
                  throws DistributedStoreException

Description copied from class: TabletStateStore

Tablet servers will update the data store with the location when they bring the tablet online

Specified by:

setLocations in class TabletStateStore

Throws:

DistributedStoreException

setFutureLocations

public void setFutureLocations(Collection<Assignment> assignments)
                        throws DistributedStoreException

Description copied from class: TabletStateStore

Store the assigned locations in the data store.

Specified by:

setFutureLocations in class TabletStateStore

Throws:

DistributedStoreException

unassign

public void unassign(Collection<TabletLocationState> tablets,
                     Map<TServerInstance,List<org.apache.hadoop.fs.Path>> logsForDeadServers)
              throws DistributedStoreException

Description copied from class: TabletStateStore

Mark the tablets as having no known or future location.

Specified by:

unassign in class TabletStateStore

Parameters:

tablets - the tablets' current information

logsForDeadServers - a cache of logs in use by servers when they died

Throws:

DistributedStoreException

suspend

public void suspend(Collection<TabletLocationState> tablets,
                    Map<TServerInstance,List<org.apache.hadoop.fs.Path>> logsForDeadServers,
                    long suspensionTimestamp)
             throws DistributedStoreException

Description copied from class: TabletStateStore

Mark tablets as having no known or future location, but desiring to be returned to their previous tserver.

Specified by:

suspend in class TabletStateStore

Throws:

DistributedStoreException

unsuspend

public void unsuspend(Collection<TabletLocationState> tablets)
               throws DistributedStoreException

Description copied from class: TabletStateStore

Remove a suspension marker for a collection of tablets, moving them to being simply unassigned.

Specified by:

unsuspend in class TabletStateStore

Throws:

DistributedStoreException

name

public String name()

Description copied from class: TabletStateStore

Identifying name for this tablet state store.

Specified by:

name in class TabletStateStore