org.apache.accumulo.server.master.state

Class TabletStateStore

java.lang.Object

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

All Implemented Interfaces:

Iterable<TabletLocationState>

Direct Known Subclasses:

MetaDataStateStore, ZooTabletStateStore

public abstract class TabletStateStore
extends Object
implements Iterable<TabletLocationState>

Interface for storing information about tablet assignments. There are three implementations: ZooTabletStateStore: information about the root tablet is stored in ZooKeeper MetaDataStateStore: information about the other tablets are stored in the metadata table

Constructor Summary

Constructors

Constructor and Description
TabletStateStore()

Method Summary

Methods

Modifier and Type	Method and Description
abstract ClosableIterator<TabletLocationState>	iterator() Scan the information about the tablets covered by this store
abstract String	name() Identifying name for this tablet state store.
abstract void	setFutureLocations(Collection<Assignment> assignments) Store the assigned locations in the data store.
static void	setLocation(Assignment assignment)
abstract void	setLocations(Collection<Assignment> assignments) Tablet servers will update the data store with the location when they bring the tablet online
abstract void	unassign(Collection<TabletLocationState> tablets) Mark the tablets as having no known or future location.
static void	unassign(TabletLocationState tls)

Methods inherited from class java.lang.Object

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

Constructor Detail

TabletStateStore

public TabletStateStore()

Method Detail

name

public abstract String name()

Identifying name for this tablet state store.

iterator

public abstract ClosableIterator<TabletLocationState> iterator()

Scan the information about the tablets covered by this store

Specified by:

iterator in interface Iterable<TabletLocationState>

setFutureLocations

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

Store the assigned locations in the data store.

Throws:

DistributedStoreException

setLocations

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

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

Throws:

DistributedStoreException

unassign

public abstract void unassign(Collection<TabletLocationState> tablets)
                       throws DistributedStoreException

Mark the tablets as having no known or future location.

Parameters:

tablets - the tablets' current information

Throws:

DistributedStoreException

unassign

public static void unassign(TabletLocationState tls)
                     throws DistributedStoreException

Throws:

DistributedStoreException

setLocation

public static void setLocation(Assignment assignment)
                        throws DistributedStoreException

Throws:

DistributedStoreException