Package org.apache.accumulo.server.manager.state

Interface TabletStateStore

All Superinterfaces:

Iterable<TabletLocationState>

public interface TabletStateStore
extends Iterable<TabletLocationState>

Interface for storing information about tablet assignments. There are three implementations:

Method Summary

Modifier and Type	Method	Description
Ample.DataLevel	getLevel()	Get the level for this state store
static TabletStateStore	getStoreForLevel(Ample.DataLevel level, ClientContext context)
static TabletStateStore	getStoreForLevel(Ample.DataLevel level, ClientContext context, CurrentState state)
static TabletStateStore	getStoreForTablet(KeyExtent extent, ServerContext context)
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.
static void	setLocation(ServerContext context, Assignment assignment)
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.
static void	suspend(ServerContext context, TabletLocationState tls, Map<TServerInstance,List<org.apache.hadoop.fs.Path>> logsForDeadServers, long suspensionTimestamp)
void	unassign(Collection<TabletLocationState> tablets, Map<TServerInstance,List<org.apache.hadoop.fs.Path>> logsForDeadServers)	Mark the tablets as having no known or future location.
static void	unassign(ServerContext context, TabletLocationState tls, Map<TServerInstance,List<org.apache.hadoop.fs.Path>> logsForDeadServers)
void	unsuspend(Collection<TabletLocationState> tablets)	Remove a suspension marker for a collection of tablets, moving them to being simply unassigned.

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

getLevel

Ample.DataLevel getLevel()

Get the level for this state store

name

String name()

Identifying name for this tablet state store.

iterator

ClosableIterator<TabletLocationState> iterator()

Scan the information about the tablets covered by this store

Specified by:

iterator in interface Iterable<TabletLocationState>

setFutureLocations

void setFutureLocations(Collection<Assignment> assignments)
                 throws DistributedStoreException

Store the assigned locations in the data store.

Throws:

DistributedStoreException

setLocations

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

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

Mark the tablets as having no known or future location.

Parameters:

tablets - the tablets' current information

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

Throws:

DistributedStoreException

suspend

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

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

Throws:

DistributedStoreException

unsuspend

void unsuspend(Collection<TabletLocationState> tablets)
        throws DistributedStoreException

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

Throws:

DistributedStoreException

unassign

static void unassign(ServerContext context,
                     TabletLocationState tls,
                     Map<TServerInstance,List<org.apache.hadoop.fs.Path>> logsForDeadServers)
              throws DistributedStoreException

Throws:

DistributedStoreException

suspend

static void suspend(ServerContext context,
                    TabletLocationState tls,
                    Map<TServerInstance,List<org.apache.hadoop.fs.Path>> logsForDeadServers,
                    long suspensionTimestamp)
             throws DistributedStoreException

Throws:

DistributedStoreException

setLocation

static void setLocation(ServerContext context,
                        Assignment assignment)
                 throws DistributedStoreException

Throws:

DistributedStoreException

getStoreForTablet

static TabletStateStore getStoreForTablet(KeyExtent extent,
                                          ServerContext context)

getStoreForLevel

static TabletStateStore getStoreForLevel(Ample.DataLevel level,
                                         ClientContext context)

getStoreForLevel

static TabletStateStore getStoreForLevel(Ample.DataLevel level,
                                         ClientContext context,
                                         CurrentState state)