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## org.apache.cassandra.service
Class StorageService

    java.lang.Object
      javax.management.NotificationBroadcasterSupport
          org.apache.cassandra.service.StorageService

All Implemented Interfaces:
  javax.management.NotificationBroadcaster, javax.management.NotificationEmitter, IEndpointStateChangeSubscriber, StorageServiceMBean

    public class StorageService

extends javax.management.NotificationBroadcasterSupport
implements IEndpointStateChangeSubscriber, StorageServiceMBean

This abstraction contains the token/identifier of this node on the identifier space. This token gets gossiped around. This class will also maintain histograms of the load information of other nodes in the cluster.

Nested Class Summary
`static class` | `StorageService.Verb`

Field Summary
`static StorageService` | `instance`
`static DebuggableScheduledThreadPoolExecutor` | `optionalTasks` tasks that do not need to be waited for on shutdown/drain
`static int` | `RING_DELAY`
`static DebuggableScheduledThreadPoolExecutor` | `scheduledTasks` This pool is used for periodic short (sub-second) tasks.
`static DebuggableScheduledThreadPoolExecutor` | `tasks` This pool is used by tasks that can have longer execution times, and usually are non periodic.
`VersionedValue.VersionedValueFactory` | `valueFactory`
`static StorageService.Verb[]` | `VERBS`
`static java.util.EnumMap<StorageService.Verb,Stage>` | `verbStages`

Constructor Summary
`StorageService()`

Method Summary
`protected void` | `addExpireTimeIfFound(java.net.InetAddress endpoint, long expireTime)`
`void` | `bulkLoad(java.lang.String directory)`
`Pair<java.util.Set<Range<Token>>,java.util.Set<Range<Token>>>` | `calculateStreamAndFetchRanges(java.util.Collection<Range<Token>> current, java.util.Collection<Range<Token>> updated)` Calculate pair of ranges to stream/fetch for given two range collections (current ranges for table and ranges after move to new token)
`void` | `clearSnapshot(java.lang.String tag, java.lang.String... tableNames)` Remove the snapshot with the given name from the given tables.
`void` | `confirmReplication(java.net.InetAddress node)`
`void` | `decommission()` transfer this node's data to other machines and remove it from service.
`void` | `deliverHints(java.lang.String host)`
`java.util.List<TokenRange>` | `describeRing(java.lang.String keyspace)` The TokenRange for a given keyspace.
`java.util.List<java.lang.String>` | `describeRingJMX(java.lang.String keyspace)` The same as `describeRing(String)` but converts TokenRange to the String for JMX compatibility
`void` | `drain()` Shuts node off to writes, empties memtables and the commit log.
`java.util.Map<java.lang.String,java.lang.Float>` | `effectiveOwnership(java.lang.String keyspace)` Effective ownership is % of the data each node owns given the keyspace we calculate the percentage using replication factor.
`protected long` | `extractExpireTime(java.lang.String[] pieces)`
`void` | `finishBootstrapping()`
`void` | `flushLargestMemtables()` Flushes the two largest memtables by ops and by throughput
`void` | `forceRemoveCompletion()` Force a remove operation to complete.
`int` | `forceRepairAsync(java.lang.String tableName, boolean isSequential, boolean primaryRange, java.lang.String... columnFamilies)` Invoke repair asynchronously.
`int` | `forceRepairAsync(java.lang.String tableName, boolean isSequential, java.util.Collection<Range<Token>> ranges, java.lang.String... columnFamilies)`
`int` | `forceRepairRangeAsync(java.lang.String beginToken, java.lang.String endToken, java.lang.String tableName, boolean isSequential, java.lang.String... columnFamilies)` Same as forceRepairAsync, but handles a specified range
`void` | `forceTableCleanup(java.lang.String tableName, java.lang.String... columnFamilies)` Trigger a cleanup of keys on a single keyspace
`void` | `forceTableCompaction(java.lang.String tableName, java.lang.String... columnFamilies)` Forces major compaction of a single keyspace
`void` | `forceTableFlush(java.lang.String tableName, java.lang.String... columnFamilies)` Flush all memtables for a table and column families.
`AntiEntropyService.RepairFuture` | `forceTableRepair(Range<Token> range, java.lang.String tableName, boolean isSequential, java.lang.String... columnFamilies)`
`void` | `forceTableRepair(java.lang.String tableName, boolean isSequential, java.lang.String... columnFamilies)` Trigger proactive repair for a table and column families.
`void` | `forceTableRepairPrimaryRange(java.lang.String tableName, boolean isSequential, java.lang.String... columnFamilies)` Triggers proactive repair but only for the node primary range.
`void` | `forceTableRepairRange(java.lang.String beginToken, java.lang.String endToken, java.lang.String tableName, boolean isSequential, java.lang.String... columnFamilies)` Perform repair of a specific range.
`void` | `forceTerminateAllRepairSessions()`
`java.lang.String[]` | `getAllDataFileLocations()` Get the list of all data file locations from conf
`java.util.List<Range<Token>>` | `getAllRanges(java.util.List<Token> sortedTokens)` Get all ranges that span the ring given a set of tokens.
`Token` | `getBootstrapToken()` return a token to which if a node bootstraps it will get about 1/2 of this node's range
`java.lang.String` | `getCommitLogLocation()` Get location of the commit log
`int` | `getCompactionThroughputMbPerSec()`
`int` | `getCurrentGenerationNumber()` Return the generation value for this node.
`java.lang.String` | `getDrainProgress()` get the progress of a drain operation
`int` | `getExceptionCount()`
`java.util.List<java.lang.String>` | `getJoiningNodes()` Retrieve the list of nodes currently bootstrapping into the ring.
`java.util.List<java.lang.String>` | `getKeyspaces()`
`java.util.List<java.lang.String>` | `getLeavingNodes()` Retrieve the list of nodes currently leaving the ring.
`java.util.List<java.net.InetAddress>` | `getLiveNaturalEndpoints(java.lang.String table, java.nio.ByteBuffer key)` This method attempts to return N endpoints that are responsible for storing the specified key i.e for replication.
`java.util.List<java.net.InetAddress>` | `getLiveNaturalEndpoints(java.lang.String table, RingPosition pos)`
`java.util.List<java.lang.String>` | `getLiveNodes()` Retrieve the list of live nodes in the cluster, where "liveness" is determined by the failure detector of the node being queried.
`double` | `getLoad()` raw load value
`java.util.Map<java.lang.String,java.lang.String>` | `getLoadMap()` Human-readable load value.
`java.lang.String` | `getLoadString()` Human-readable load value
`Range<Token>` | `getLocalPrimaryRange()`
`java.util.Collection<Range<Token>>` | `getLocalRanges(java.lang.String table)`
`Token` | `getLocalToken()`
`java.util.List<java.lang.String>` | `getMovingNodes()` Retrieve the list of nodes currently moving in the ring.
`java.util.List<java.net.InetAddress>` | `getNaturalEndpoints(java.lang.String table, java.nio.ByteBuffer key)`
`java.util.List<java.net.InetAddress>` | `getNaturalEndpoints(java.lang.String table, RingPosition pos)` This method returns the N endpoints that are responsible for storing the specified key i.e for replication.
`java.util.List<java.net.InetAddress>` | `getNaturalEndpoints(java.lang.String table, java.lang.String cf, java.lang.String key)` This method returns the N endpoints that are responsible for storing the specified key i.e for replication.
`java.lang.String` | `getOperationMode()` get the operational mode (leaving, joining, normal, decommissioned, client)
`java.util.Map<java.lang.String,java.lang.Float>` | `getOwnership()` given a list of tokens (representing the nodes in the cluster), returns a mapping from "token -> %age of cluster owned by that token"
`static IPartitioner` | `getPartitioner()`
`java.util.Map<java.util.List<java.lang.String>,java.util.List<java.lang.String>>` | `getPendingRangeToEndpointMap(java.lang.String keyspace)` Retrieve a map of pending ranges to endpoints that describe the ring topology
`java.util.List<java.lang.String>` | `getPrimaryRange()` Returns the local node's primary range.
`Range<Token>` | `getPrimaryRangeForEndpoint(java.net.InetAddress ep)` Get the primary range for the specified endpoint.
`java.util.Map<Range<Token>,java.util.List<java.net.InetAddress>>` | `getRangeToAddressMap(java.lang.String keyspace)`
`java.util.Map<java.util.List<java.lang.String>,java.util.List<java.lang.String>>` | `getRangeToEndpointMap(java.lang.String keyspace)` for a keyspace, return the ranges and corresponding listen addresses.
`java.util.Map<java.util.List<java.lang.String>,java.util.List<java.lang.String>>` | `getRangeToRpcaddressMap(java.lang.String keyspace)` for a keyspace, return the ranges and corresponding RPC addresses for a given keyspace.
`java.lang.String` | `getReleaseVersion()` Fetch a string representation of the Cassandra version.
`java.lang.String` | `getRemovalStatus()` Get the status of a token removal.
`java.lang.String` | `getRpcaddress(java.net.InetAddress endpoint)` Return the rpc address associated with an endpoint as a string.
`java.lang.String` | `getSavedCachesLocation()` Get location of the saved caches dir
`java.lang.String` | `getSchemaVersion()` Fetch a string representation of the current Schema version.
`java.util.List<Pair<Range<Token>,java.lang.Long>>` | `getSplits(java.lang.String table, java.lang.String cfName, Range<Token> range, int keysPerSplit)`
`int` | `getStreamThroughputMbPerSec()`
`java.net.InetAddress` | `getSuccessor(java.net.InetAddress ep)`
`java.lang.String` | `getToken()` Fetch a string representation of the token.
`TokenMetadata` | `getTokenMetadata()`
`java.util.Map<java.lang.String,java.lang.String>` | `getTokenToEndpointMap()` Retrieve a map of tokens to endpoints, including the bootstrapping ones.
`java.util.List<java.lang.String>` | `getUnreachableNodes()` Retrieve the list of unreachable nodes in the cluster, as determined by this node's failure detector.
`java.lang.Iterable<ColumnFamilyStore>` | `getValidColumnFamilies(java.lang.String tableName, java.lang.String... cfNames)`
`void` | `initClient()`
`void` | `initClient(int delay)`
`void` | `initServer()`
`void` | `initServer(int delay)`
`boolean` | `isBootstrapMode()`
`boolean` | `isClientMode()`
`boolean` | `isIncrementalBackupsEnabled()`
`boolean` | `isInitialized()`
`boolean` | `isJoined()`
`boolean` | `isRPCServerRunning()`
`void` | `joinRing()`
`void` | `loadNewSSTables(java.lang.String ksName, java.lang.String cfName)` #Load new SSTables to the given keyspace/columnFamily
`void` | `move(java.lang.String newToken)`
`void` | `onAlive(java.net.InetAddress endpoint, EndpointState state)`
`void` | `onChange(java.net.InetAddress endpoint, ApplicationState state, VersionedValue value)`
`void` | `onDead(java.net.InetAddress endpoint, EndpointState state)`
`void` | `onJoin(java.net.InetAddress endpoint, EndpointState epState)` Use to inform interested parties about the change in the state for specified endpoint
`void` | `onRemove(java.net.InetAddress endpoint)`
`void` | `onRestart(java.net.InetAddress endpoint, EndpointState state)` Called whenever a node is restarted.
`void` | `rebuild(java.lang.String sourceDc)` Initiate a process of streaming data for which we are responsible from other nodes.
`void` | `rebuildSecondaryIndex(java.lang.String ksName, java.lang.String cfName, java.lang.String... idxNames)` rebuild the specified indexes
`void` | `registerDaemon(CassandraDaemon daemon)`
`void` | `removeToken(java.lang.String tokenString)` Remove a node that has died, attempting to restore the replica count.
`void` | `requestGC()`
`void` | `rescheduleFailedDeletions()`
`void` | `resetLocalSchema()`
`java.util.List<java.lang.String>` | `sampleKeyRange()` #Return a List of Tokens representing a sample of keys across all ColumnFamilyStores.
`void` | `scrub(java.lang.String tableName, java.lang.String... columnFamilies)` Scrub (deserialize + reserialize at the latest version, skipping bad rows if any) the given keyspace.
`void` | `sendNotification(java.lang.String type, java.lang.String message, java.lang.Object userObject)` Sends JMX notification to subscribers.
`void` | `setCompactionThroughputMbPerSec(int value)`
`void` | `setIncrementalBackupsEnabled(boolean value)`
`void` | `setLog4jLevel(java.lang.String classQualifier, java.lang.String rawLevel)` set the logging level at runtime
`void` | `setStreamThroughputMbPerSec(int value)`
`void` | `setToken(Token token)` This method updates the local token on disk
`void` | `startGossiping()`
`void` | `startRPCServer()`
`void` | `stopClient()`
`void` | `stopGossiping()`
`void` | `stopRPCServer()`
`void` | `takeColumnFamilySnapshot(java.lang.String tableName, java.lang.String columnFamilyName, java.lang.String tag)` Takes the snapshot of a specific column family.
`void` | `takeSnapshot(java.lang.String tag, java.lang.String... tableNames)` Takes the snapshot for the given tables.
`void` | `truncate(java.lang.String keyspace, java.lang.String columnFamily)` Truncates (deletes) the given columnFamily from the provided keyspace.
`void` | `updateSnitch(java.lang.String epSnitchClassName, java.lang.Boolean dynamic, java.lang.Integer dynamicUpdateInterval, java.lang.Integer dynamicResetInterval, java.lang.Double dynamicBadnessThreshold)` Change endpointsnitch class and dynamic-ness (and dynamic attributes) at runtime
`void` | `upgradeSSTables(java.lang.String tableName, java.lang.String... columnFamilies)` Rewrite all sstables to the latest version.

Methods inherited from class javax.management.NotificationBroadcasterSupport
`addNotificationListener, getNotificationInfo, handleNotification, removeNotificationListener, removeNotificationListener, sendNotification`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface javax.management.NotificationEmitter
`removeNotificationListener`

Methods inherited from interface javax.management.NotificationBroadcaster
`addNotificationListener, getNotificationInfo, removeNotificationListener`

Field Detail

### RING_DELAY

    public static final int RING_DELAY

### VERBS

    public static final StorageService.Verb[] VERBS

### verbStages

    public static final java.util.EnumMap<StorageService.Verb,Stage> verbStages

### scheduledTasks

    public static final DebuggableScheduledThreadPoolExecutor scheduledTasks

  This pool is used for periodic short (sub-second) tasks.

### tasks

    public static final DebuggableScheduledThreadPoolExecutor tasks

  This pool is used by tasks that can have longer execution times, and usually are non periodic.

### optionalTasks

    public static final DebuggableScheduledThreadPoolExecutor optionalTasks

  tasks that do not need to be waited for on shutdown/drain

### valueFactory

    public VersionedValue.VersionedValueFactory valueFactory

### instance

    public static final StorageService instance

Constructor Detail

### StorageService

    public StorageService()

Method Detail

### getPartitioner

    public static IPartitioner getPartitioner()

### getLocalRanges

    public java.util.Collection<Range<Token>> getLocalRanges(java.lang.String table)

### getLocalPrimaryRange

    public Range<Token> getLocalPrimaryRange()

### getPrimaryRange

    public java.util.List<java.lang.String> getPrimaryRange()

  Description copied from interface: `StorageServiceMBean`
  Returns the local node's primary range.

  Specified by:
    `getPrimaryRange` in interface `StorageServiceMBean`

### finishBootstrapping

    public void finishBootstrapping()

### setToken

    public void setToken(Token token)

  This method updates the local token on disk

### registerDaemon

    public void registerDaemon(CassandraDaemon daemon)

### stopGossiping

    public void stopGossiping()

  Specified by:
    `stopGossiping` in interface `StorageServiceMBean`

### startGossiping

    public void startGossiping()

  Specified by:
    `startGossiping` in interface `StorageServiceMBean`

### startRPCServer

    public void startRPCServer()

  Specified by:
    `startRPCServer` in interface `StorageServiceMBean`

### stopRPCServer

    public void stopRPCServer()

  Specified by:
    `stopRPCServer` in interface `StorageServiceMBean`

### isRPCServerRunning

    public boolean isRPCServerRunning()

  Specified by:
    `isRPCServerRunning` in interface `StorageServiceMBean`

### stopClient

    public void stopClient()

### isInitialized

    public boolean isInitialized()

  Specified by:
    `isInitialized` in interface `StorageServiceMBean`

### initClient

    public void initClient()
                    throws java.io.IOException,
                           ConfigurationException

  Throws:
    `java.io.IOException`
    `ConfigurationException`

### initClient

    public void initClient(int delay)
                    throws java.io.IOException,
                           ConfigurationException

  Throws:
    `java.io.IOException`
    `ConfigurationException`

### initServer

    public void initServer()
                    throws java.io.IOException,
                           ConfigurationException

  Throws:
    `java.io.IOException`
    `ConfigurationException`

### initServer

    public void initServer(int delay)
                    throws java.io.IOException,
                           ConfigurationException

  Throws:
    `java.io.IOException`
    `ConfigurationException`

### joinRing

    public void joinRing()
                  throws java.io.IOException,
                         ConfigurationException

  Specified by:
    `joinRing` in interface `StorageServiceMBean`
  Throws:
    `java.io.IOException`
    `ConfigurationException`

### isJoined

    public boolean isJoined()

  Specified by:
    `isJoined` in interface `StorageServiceMBean`

### rebuild

    public void rebuild(java.lang.String sourceDc)

  Description copied from interface: `StorageServiceMBean`
  Initiate a process of streaming data for which we are responsible from other nodes. It is similar to bootstrap except meant to be used on a node which is already in the cluster (typically containing no data) as an alternative to running repair.

  Specified by:
    `rebuild` in interface `StorageServiceMBean`
  Parameters:
    `sourceDc` - Name of DC from which to select sources for streaming or null to pick any node

### setStreamThroughputMbPerSec

    public void setStreamThroughputMbPerSec(int value)

  Specified by:
    `setStreamThroughputMbPerSec` in interface `StorageServiceMBean`

### getStreamThroughputMbPerSec

    public int getStreamThroughputMbPerSec()

  Specified by:
    `getStreamThroughputMbPerSec` in interface `StorageServiceMBean`

### getCompactionThroughputMbPerSec

    public int getCompactionThroughputMbPerSec()

  Specified by:
    `getCompactionThroughputMbPerSec` in interface `StorageServiceMBean`

### setCompactionThroughputMbPerSec

    public void setCompactionThroughputMbPerSec(int value)

  Specified by:
    `setCompactionThroughputMbPerSec` in interface `StorageServiceMBean`

### isIncrementalBackupsEnabled

    public boolean isIncrementalBackupsEnabled()

  Specified by:
    `isIncrementalBackupsEnabled` in interface `StorageServiceMBean`

### setIncrementalBackupsEnabled

    public void setIncrementalBackupsEnabled(boolean value)

  Specified by:
    `setIncrementalBackupsEnabled` in interface `StorageServiceMBean`

### isBootstrapMode

    public boolean isBootstrapMode()

### getTokenMetadata

    public TokenMetadata getTokenMetadata()

### getRangeToEndpointMap

    public java.util.Map<java.util.List<java.lang.String>,java.util.List<java.lang.String>> getRangeToEndpointMap(java.lang.String keyspace)

  for a keyspace, return the ranges and corresponding listen addresses.

  Specified by:
    `getRangeToEndpointMap` in interface `StorageServiceMBean`
  Parameters:
    `keyspace` -
  Returns:

### getRpcaddress

    public java.lang.String getRpcaddress(java.net.InetAddress endpoint)

  Return the rpc address associated with an endpoint as a string.

  Parameters:
    `endpoint` - The endpoint to get rpc address for
  Returns:

### getRangeToRpcaddressMap

    public java.util.Map<java.util.List<java.lang.String>,java.util.List<java.lang.String>> getRangeToRpcaddressMap(java.lang.String keyspace)

  for a keyspace, return the ranges and corresponding RPC addresses for a given keyspace.

  Specified by:
    `getRangeToRpcaddressMap` in interface `StorageServiceMBean`
  Parameters:
    `keyspace` -
  Returns:

### getPendingRangeToEndpointMap

    public java.util.Map<java.util.List<java.lang.String>,java.util.List<java.lang.String>> getPendingRangeToEndpointMap(java.lang.String keyspace)

  Description copied from interface: `StorageServiceMBean`
  Retrieve a map of pending ranges to endpoints that describe the ring topology

  Specified by:
    `getPendingRangeToEndpointMap` in interface `StorageServiceMBean`
  Parameters:
    `keyspace` - the keyspace to get the pending range map for.
  Returns:
    a map of pending ranges to endpoints

### getRangeToAddressMap

    public java.util.Map<Range<Token>,java.util.List<java.net.InetAddress>> getRangeToAddressMap(java.lang.String keyspace)

### describeRingJMX

    public java.util.List<java.lang.String> describeRingJMX(java.lang.String keyspace)
                                                     throws InvalidRequestException

  The same as `describeRing(String)` but converts TokenRange to the String for JMX compatibility

  Specified by:
    `describeRingJMX` in interface `StorageServiceMBean`
  Parameters:
    `keyspace` - The keyspace to fetch information about
  Returns:
    a List of TokenRange(s) converted to String for the given keyspace
  Throws:
    `InvalidRequestException` - if there is no ring information available about keyspace

### describeRing

    public java.util.List<TokenRange> describeRing(java.lang.String keyspace)
                                            throws InvalidRequestException

  The TokenRange for a given keyspace.

  Parameters:
    `keyspace` - The keyspace to fetch information about
  Returns:
    a List of TokenRange(s) for the given keyspace
  Throws:
    `InvalidRequestException` - if there is no ring information available about keyspace

### getTokenToEndpointMap

    public java.util.Map<java.lang.String,java.lang.String> getTokenToEndpointMap()

  Description copied from interface: `StorageServiceMBean`
  Retrieve a map of tokens to endpoints, including the bootstrapping ones.

  Specified by:
    `getTokenToEndpointMap` in interface `StorageServiceMBean`
  Returns:
    a map of tokens to endpoints in ascending order

### onChange

    public void onChange(java.net.InetAddress endpoint,
                         ApplicationState state,
                         VersionedValue value)

  Specified by:
    `onChange` in interface `IEndpointStateChangeSubscriber`

### addExpireTimeIfFound

    protected void addExpireTimeIfFound(java.net.InetAddress endpoint,
                                        long expireTime)

### extractExpireTime

    protected long extractExpireTime(java.lang.String[] pieces)

### onJoin

    public void onJoin(java.net.InetAddress endpoint,
                       EndpointState epState)

  Description copied from interface: `IEndpointStateChangeSubscriber`
  Use to inform interested parties about the change in the state for specified endpoint

  Specified by:
    `onJoin` in interface `IEndpointStateChangeSubscriber`
  Parameters:
    `endpoint` - endpoint for which the state change occurred.
    `epState` - state that actually changed for the above endpoint.

### onAlive

    public void onAlive(java.net.InetAddress endpoint,
                        EndpointState state)

  Specified by:
    `onAlive` in interface `IEndpointStateChangeSubscriber`

### onRemove

    public void onRemove(java.net.InetAddress endpoint)

  Specified by:
    `onRemove` in interface `IEndpointStateChangeSubscriber`

### onDead

    public void onDead(java.net.InetAddress endpoint,
                       EndpointState state)

  Specified by:
    `onDead` in interface `IEndpointStateChangeSubscriber`

### onRestart

    public void onRestart(java.net.InetAddress endpoint,
                          EndpointState state)

  Description copied from interface: `IEndpointStateChangeSubscriber`
  Called whenever a node is restarted. Note that there is no guarantee when that happens that the node was previously marked down. It will have only if `state.isAlive() == false` as `state` is from before the restarted node is marked up.

  Specified by:
    `onRestart` in interface `IEndpointStateChangeSubscriber`

### getLoad

    public double getLoad()

  raw load value

  Specified by:
    `getLoad` in interface `StorageServiceMBean`

### getLoadString

    public java.lang.String getLoadString()

  Description copied from interface: `StorageServiceMBean`
  Human-readable load value

  Specified by:
    `getLoadString` in interface `StorageServiceMBean`

### getLoadMap

    public java.util.Map<java.lang.String,java.lang.String> getLoadMap()

  Description copied from interface: `StorageServiceMBean`
  Human-readable load value. Keys are IP addresses.

  Specified by:
    `getLoadMap` in interface `StorageServiceMBean`

### deliverHints

    public final void deliverHints(java.lang.String host)
                            throws java.net.UnknownHostException

  Throws:
    `java.net.UnknownHostException`

### getLocalToken

    public Token getLocalToken()

### getToken

    public java.lang.String getToken()

  Description copied from interface: `StorageServiceMBean`
  Fetch a string representation of the token.

  Specified by:
    `getToken` in interface `StorageServiceMBean`
  Returns:
    a string token

### getReleaseVersion

    public java.lang.String getReleaseVersion()

  Description copied from interface: `StorageServiceMBean`
  Fetch a string representation of the Cassandra version.

  Specified by:
    `getReleaseVersion` in interface `StorageServiceMBean`
  Returns:
    A string representation of the Cassandra version.

### getSchemaVersion

    public java.lang.String getSchemaVersion()

  Description copied from interface: `StorageServiceMBean`
  Fetch a string representation of the current Schema version.

  Specified by:
    `getSchemaVersion` in interface `StorageServiceMBean`
  Returns:
    A string representation of the Schema version.

### getLeavingNodes

    public java.util.List<java.lang.String> getLeavingNodes()

  Description copied from interface: `StorageServiceMBean`
  Retrieve the list of nodes currently leaving the ring.

  Specified by:
    `getLeavingNodes` in interface `StorageServiceMBean`
  Returns:
    set of IP addresses, as Strings

### getMovingNodes

    public java.util.List<java.lang.String> getMovingNodes()

  Description copied from interface: `StorageServiceMBean`
  Retrieve the list of nodes currently moving in the ring.

  Specified by:
    `getMovingNodes` in interface `StorageServiceMBean`
  Returns:
    set of IP addresses, as Strings

### getJoiningNodes

    public java.util.List<java.lang.String> getJoiningNodes()

  Description copied from interface: `StorageServiceMBean`
  Retrieve the list of nodes currently bootstrapping into the ring.

  Specified by:
    `getJoiningNodes` in interface `StorageServiceMBean`
  Returns:
    set of IP addresses, as Strings

### getLiveNodes

    public java.util.List<java.lang.String> getLiveNodes()

  Description copied from interface: `StorageServiceMBean`
  Retrieve the list of live nodes in the cluster, where "liveness" is determined by the failure detector of the node being queried.

  Specified by:
    `getLiveNodes` in interface `StorageServiceMBean`
  Returns:
    set of IP addresses, as Strings

### getUnreachableNodes

    public java.util.List<java.lang.String> getUnreachableNodes()

  Description copied from interface: `StorageServiceMBean`
  Retrieve the list of unreachable nodes in the cluster, as determined by this node's failure detector.

  Specified by:
    `getUnreachableNodes` in interface `StorageServiceMBean`
  Returns:
    set of IP addresses, as Strings

### getAllDataFileLocations

    public java.lang.String[] getAllDataFileLocations()

  Description copied from interface: `StorageServiceMBean`
  Get the list of all data file locations from conf

  Specified by:
    `getAllDataFileLocations` in interface `StorageServiceMBean`
  Returns:
    String array of all locations

### getCommitLogLocation

    public java.lang.String getCommitLogLocation()

  Description copied from interface: `StorageServiceMBean`
  Get location of the commit log

  Specified by:
    `getCommitLogLocation` in interface `StorageServiceMBean`
  Returns:
    a string path

### getSavedCachesLocation

    public java.lang.String getSavedCachesLocation()

  Description copied from interface: `StorageServiceMBean`
  Get location of the saved caches dir

  Specified by:
    `getSavedCachesLocation` in interface `StorageServiceMBean`
  Returns:
    a string path

### getCurrentGenerationNumber

    public int getCurrentGenerationNumber()

  Description copied from interface: `StorageServiceMBean`
  Return the generation value for this node.

  Specified by:
    `getCurrentGenerationNumber` in interface `StorageServiceMBean`
  Returns:
    generation number

### forceTableCleanup

    public void forceTableCleanup(java.lang.String tableName,
                                  java.lang.String... columnFamilies)
                           throws java.io.IOException,
                                  java.util.concurrent.ExecutionException,
                                  java.lang.InterruptedException

  Description copied from interface: `StorageServiceMBean`
  Trigger a cleanup of keys on a single keyspace

  Specified by:
    `forceTableCleanup` in interface `StorageServiceMBean`
  Throws:
    `java.io.IOException`
    `java.util.concurrent.ExecutionException`
    `java.lang.InterruptedException`

### scrub

    public void scrub(java.lang.String tableName,
                      java.lang.String... columnFamilies)
               throws java.io.IOException,
                      java.util.concurrent.ExecutionException,
                      java.lang.InterruptedException

  Description copied from interface: `StorageServiceMBean`
  Scrub (deserialize + reserialize at the latest version, skipping bad rows if any) the given keyspace. If columnFamilies array is empty, all CFs are scrubbed. Scrubbed CFs will be snapshotted first.

  Specified by:
    `scrub` in interface `StorageServiceMBean`
  Throws:
    `java.io.IOException`
    `java.util.concurrent.ExecutionException`
    `java.lang.InterruptedException`

### upgradeSSTables

    public void upgradeSSTables(java.lang.String tableName,
                                java.lang.String... columnFamilies)
                         throws java.io.IOException,
                                java.util.concurrent.ExecutionException,
                                java.lang.InterruptedException

  Description copied from interface: `StorageServiceMBean`
  Rewrite all sstables to the latest version. Unlike scrub, it doesn't skip bad rows and do not snapshot sstables first.

  Specified by:
    `upgradeSSTables` in interface `StorageServiceMBean`
  Throws:
    `java.io.IOException`
    `java.util.concurrent.ExecutionException`
    `java.lang.InterruptedException`

### forceTableCompaction

    public void forceTableCompaction(java.lang.String tableName,
                                     java.lang.String... columnFamilies)
                              throws java.io.IOException,
                                     java.util.concurrent.ExecutionException,
                                     java.lang.InterruptedException

  Description copied from interface: `StorageServiceMBean`
  Forces major compaction of a single keyspace

  Specified by:
    `forceTableCompaction` in interface `StorageServiceMBean`
  Throws:
    `java.io.IOException`
    `java.util.concurrent.ExecutionException`
    `java.lang.InterruptedException`

### takeSnapshot

    public void takeSnapshot(java.lang.String tag,
                             java.lang.String... tableNames)
                      throws java.io.IOException

  Takes the snapshot for the given tables. A snapshot name must be specified.

  Specified by:
    `takeSnapshot` in interface `StorageServiceMBean`
  Parameters:
    `tag` - the tag given to the snapshot; may not be null or empty
    `tableNames` - the name of the tables to snapshot; empty means "all."
  Throws:
    `java.io.IOException`

### takeColumnFamilySnapshot

    public void takeColumnFamilySnapshot(java.lang.String tableName,
                                         java.lang.String columnFamilyName,
                                         java.lang.String tag)
                                  throws java.io.IOException

  Takes the snapshot of a specific column family. A snapshot name must be specified.

  Specified by:
    `takeColumnFamilySnapshot` in interface `StorageServiceMBean`
  Parameters:
    `tableName` - the keyspace which holds the specified column family
    `columnFamilyName` - the column family to snapshot
    `tag` - the tag given to the snapshot; may not be null or empty
  Throws:
    `java.io.IOException`

### clearSnapshot

    public void clearSnapshot(java.lang.String tag,
                              java.lang.String... tableNames)
                       throws java.io.IOException

  Remove the snapshot with the given name from the given tables. If no tag is specified we will remove all snapshots.

  Specified by:
    `clearSnapshot` in interface `StorageServiceMBean`
  Throws:
    `java.io.IOException`

### getValidColumnFamilies

    public java.lang.Iterable<ColumnFamilyStore> getValidColumnFamilies(java.lang.String tableName,
                                                                        java.lang.String... cfNames)
                                                                 throws java.io.IOException

  Throws:
    `java.io.IOException`

### forceTableFlush

    public void forceTableFlush(java.lang.String tableName,
                                java.lang.String... columnFamilies)
                         throws java.io.IOException,
                                java.util.concurrent.ExecutionException,
                                java.lang.InterruptedException

  Flush all memtables for a table and column families.

  Specified by:
    `forceTableFlush` in interface `StorageServiceMBean`
  Parameters:
    `tableName` -
    `columnFamilies` -
  Throws:
    `java.io.IOException`
    `java.util.concurrent.ExecutionException`
    `java.lang.InterruptedException`

### sendNotification

    public void sendNotification(java.lang.String type,
                                 java.lang.String message,
                                 java.lang.Object userObject)

  Sends JMX notification to subscribers.

  Parameters:
    `type` - Message type
    `message` - Message itself
    `userObject` - Arbitrary object to attach to notification

### forceRepairAsync

    public int forceRepairAsync(java.lang.String tableName,
                                boolean isSequential,
                                boolean primaryRange,
                                java.lang.String... columnFamilies)

  Description copied from interface: `StorageServiceMBean`
  Invoke repair asynchronously. You can track repair progress by subscribing JMX notification sent from this StorageServiceMBean. Notification format is: type: "repair" userObject: int array of length 2, [0]=command number, [1]=ordinal of AntiEntropyService.Status

  Specified by:
    `forceRepairAsync` in interface `StorageServiceMBean`
  Returns:
    Repair command number, or 0 if nothing to repair
  See Also:
    `StorageServiceMBean.forceTableRepair(String, boolean, String...)`

### forceRepairAsync

    public int forceRepairAsync(java.lang.String tableName,
                                boolean isSequential,
                                java.util.Collection<Range<Token>> ranges,
                                java.lang.String... columnFamilies)

### forceRepairRangeAsync

    public int forceRepairRangeAsync(java.lang.String beginToken,
                                     java.lang.String endToken,
                                     java.lang.String tableName,
                                     boolean isSequential,
                                     java.lang.String... columnFamilies)

  Description copied from interface: `StorageServiceMBean`
  Same as forceRepairAsync, but handles a specified range

  Specified by:
    `forceRepairRangeAsync` in interface `StorageServiceMBean`

### forceTableRepair

    public void forceTableRepair(java.lang.String tableName,
                                 boolean isSequential,
                                 java.lang.String... columnFamilies)
                          throws java.io.IOException

  Trigger proactive repair for a table and column families.

  Specified by:
    `forceTableRepair` in interface `StorageServiceMBean`
  Parameters:
    `tableName` -
    `columnFamilies` -
  Throws:
    `java.io.IOException`

### forceTableRepairPrimaryRange

    public void forceTableRepairPrimaryRange(java.lang.String tableName,
                                             boolean isSequential,
                                             java.lang.String... columnFamilies)
                                      throws java.io.IOException

  Description copied from interface: `StorageServiceMBean`
  Triggers proactive repair but only for the node primary range.

  Specified by:
    `forceTableRepairPrimaryRange` in interface `StorageServiceMBean`
  Throws:
    `java.io.IOException`

### forceTableRepairRange

    public void forceTableRepairRange(java.lang.String beginToken,
                                      java.lang.String endToken,
                                      java.lang.String tableName,
                                      boolean isSequential,
                                      java.lang.String... columnFamilies)
                               throws java.io.IOException

  Description copied from interface: `StorageServiceMBean`
  Perform repair of a specific range. This allows incremental repair to be performed by having an external controller submitting repair jobs. Note that the provided range much be a subset of one of the node local range.

  Specified by:
    `forceTableRepairRange` in interface `StorageServiceMBean`
  Throws:
    `java.io.IOException`

### forceTableRepair

    public AntiEntropyService.RepairFuture forceTableRepair(Range<Token> range,
                                                            java.lang.String tableName,
                                                            boolean isSequential,
                                                            java.lang.String... columnFamilies)
                                                     throws java.io.IOException

  Throws:
    `java.io.IOException`

### forceTerminateAllRepairSessions

    public void forceTerminateAllRepairSessions()

  Specified by:
    `forceTerminateAllRepairSessions` in interface `StorageServiceMBean`

### getSuccessor

    public java.net.InetAddress getSuccessor(java.net.InetAddress ep)

### getPrimaryRangeForEndpoint

    public Range<Token> getPrimaryRangeForEndpoint(java.net.InetAddress ep)

  Get the primary range for the specified endpoint.

  Parameters:
    `ep` - endpoint we are interested in.
  Returns:
    range for the specified endpoint.

### getAllRanges

    public java.util.List<Range<Token>> getAllRanges(java.util.List<Token> sortedTokens)

  Get all ranges that span the ring given a set of tokens. All ranges are in sorted order of ranges.

  Returns:
    ranges in sorted order

### getNaturalEndpoints

    public java.util.List<java.net.InetAddress> getNaturalEndpoints(java.lang.String table,
                                                                    java.lang.String cf,
                                                                    java.lang.String key)

  This method returns the N endpoints that are responsible for storing the specified key i.e for replication.

  Specified by:
    `getNaturalEndpoints` in interface `StorageServiceMBean`
  Parameters:
    `table` - keyspace name also known as table
    `cf` - Column family name
    `key` - key for which we need to find the endpoint
  Returns:
    the endpoint responsible for this key

### getNaturalEndpoints

    public java.util.List<java.net.InetAddress> getNaturalEndpoints(java.lang.String table,
                                                                    java.nio.ByteBuffer key)

  Specified by:
    `getNaturalEndpoints` in interface `StorageServiceMBean`

### getNaturalEndpoints

    public java.util.List<java.net.InetAddress> getNaturalEndpoints(java.lang.String table,
                                                                    RingPosition pos)

  This method returns the N endpoints that are responsible for storing the specified key i.e for replication.

  Parameters:
    `table` - keyspace name also known as table
    `pos` - position for which we need to find the endpoint
  Returns:
    the endpoint responsible for this token

### getLiveNaturalEndpoints

    public java.util.List<java.net.InetAddress> getLiveNaturalEndpoints(java.lang.String table,
                                                                        java.nio.ByteBuffer key)

  This method attempts to return N endpoints that are responsible for storing the specified key i.e for replication.

  Parameters:
    `table` - keyspace name also known as table
    `key` - key for which we need to find the endpoint
  Returns:
    the endpoint responsible for this key

### getLiveNaturalEndpoints

    public java.util.List<java.net.InetAddress> getLiveNaturalEndpoints(java.lang.String table,
                                                                        RingPosition pos)

### setLog4jLevel

    public void setLog4jLevel(java.lang.String classQualifier,
                              java.lang.String rawLevel)

  Description copied from interface: `StorageServiceMBean`
  set the logging level at runtime

  Specified by:
    `setLog4jLevel` in interface `StorageServiceMBean`

### getSplits

    public java.util.List<Pair<Range<Token>,java.lang.Long>> getSplits(java.lang.String table,
                                                                       java.lang.String cfName,
                                                                       Range<Token> range,
                                                                       int keysPerSplit)

  Returns:
    list of Token ranges (_not_ keys!) together with estimated key count, breaking up the data this node is responsible for into pieces of roughly keysPerSplit

### getBootstrapToken

    public Token getBootstrapToken()

  return a token to which if a node bootstraps it will get about 1/2 of this node's range

### decommission

    public void decommission()
                      throws java.lang.InterruptedException

  Description copied from interface: `StorageServiceMBean`
  transfer this node's data to other machines and remove it from service.

  Specified by:
    `decommission` in interface `StorageServiceMBean`
  Throws:
    `java.lang.InterruptedException`

### move

    public void move(java.lang.String newToken)
              throws java.io.IOException,
                     java.lang.InterruptedException,
                     ConfigurationException

  Specified by:
    `move` in interface `StorageServiceMBean`
  Parameters:
    `newToken` - token to move this node to. This node will unload its data onto its neighbors, and bootstrap to the new token.
  Throws:
    `java.io.IOException`
    `java.lang.InterruptedException`
    `ConfigurationException`

### getRemovalStatus

    public java.lang.String getRemovalStatus()

  Get the status of a token removal.

  Specified by:
    `getRemovalStatus` in interface `StorageServiceMBean`

### forceRemoveCompletion

    public void forceRemoveCompletion()

  Force a remove operation to complete. This may be necessary if a remove operation blocks forever due to node/stream failure. removeToken() must be called first, this is a last resort measure. No further attempt will be made to restore replicas.

  Specified by:
    `forceRemoveCompletion` in interface `StorageServiceMBean`

### removeToken

    public void removeToken(java.lang.String tokenString)

  Remove a node that has died, attempting to restore the replica count. If the node is alive, decommission should be attempted. If decommission fails, then removeToken should be called. If we fail while trying to restore the replica count, finally forceRemoveCompleteion should be called to forcibly remove the node without regard to replica count.

  Specified by:
    `removeToken` in interface `StorageServiceMBean`
  Parameters:
    `tokenString` - token for the node

### confirmReplication

    public void confirmReplication(java.net.InetAddress node)

### isClientMode

    public boolean isClientMode()

### requestGC

    public void requestGC()

### getOperationMode

    public java.lang.String getOperationMode()

  Description copied from interface: `StorageServiceMBean`
  get the operational mode (leaving, joining, normal, decommissioned, client)

  Specified by:
    `getOperationMode` in interface `StorageServiceMBean`

### getDrainProgress

    public java.lang.String getDrainProgress()

  Description copied from interface: `StorageServiceMBean`
  get the progress of a drain operation

  Specified by:
    `getDrainProgress` in interface `StorageServiceMBean`

### drain

    public void drain()
               throws java.io.IOException,
                      java.lang.InterruptedException,
                      java.util.concurrent.ExecutionException

  Shuts node off to writes, empties memtables and the commit log. There are two differences between drain and the normal shutdown hook: - Drain waits for in-progress streaming to complete - Drain flushes *all* columnfamilies (shutdown hook only flushes non-durable CFs)

  Specified by:
    `drain` in interface `StorageServiceMBean`
  Throws:
    `java.io.IOException`
    `java.lang.InterruptedException`
    `java.util.concurrent.ExecutionException`

### truncate

    public void truncate(java.lang.String keyspace,
                         java.lang.String columnFamily)
                  throws UnavailableException,
                         java.util.concurrent.TimeoutException,
                         java.io.IOException

  Description copied from interface: `StorageServiceMBean`
  Truncates (deletes) the given columnFamily from the provided keyspace. Calling truncate results in actual deletion of all data in the cluster under the given columnFamily and it will fail unless all hosts are up. All data in the given column family will be deleted, but its definition will not be affected.

  Specified by:
    `truncate` in interface `StorageServiceMBean`
  Parameters:
    `keyspace` - The keyspace to delete from
    `columnFamily` - The column family to delete data from.
  Throws:
    `UnavailableException` - if some of the hosts in the ring are down.
    `java.util.concurrent.TimeoutException`
    `java.io.IOException`

### getOwnership

    public java.util.Map<java.lang.String,java.lang.Float> getOwnership()

  Description copied from interface: `StorageServiceMBean`
  given a list of tokens (representing the nodes in the cluster), returns a mapping from "token -> %age of cluster owned by that token"

  Specified by:
    `getOwnership` in interface `StorageServiceMBean`

### effectiveOwnership

    public java.util.Map<java.lang.String,java.lang.Float> effectiveOwnership(java.lang.String keyspace)
                                                                       throws ConfigurationException

  Description copied from interface: `StorageServiceMBean`
  Effective ownership is % of the data each node owns given the keyspace we calculate the percentage using replication factor. If Keyspace == null, this method will try to verify if all the keyspaces in the cluster have the same replication strategies and if yes then we will use the first else a empty Map is returned.

  Specified by:
    `effectiveOwnership` in interface `StorageServiceMBean`
  Throws:
    `ConfigurationException`

### getKeyspaces

    public java.util.List<java.lang.String> getKeyspaces()

  Specified by:
    `getKeyspaces` in interface `StorageServiceMBean`

### updateSnitch

    public void updateSnitch(java.lang.String epSnitchClassName,
                             java.lang.Boolean dynamic,
                             java.lang.Integer dynamicUpdateInterval,
                             java.lang.Integer dynamicResetInterval,
                             java.lang.Double dynamicBadnessThreshold)
                      throws ConfigurationException

  Description copied from interface: `StorageServiceMBean`
  Change endpointsnitch class and dynamic-ness (and dynamic attributes) at runtime

  Specified by:
    `updateSnitch` in interface `StorageServiceMBean`
  Parameters:
    `epSnitchClassName` - the canonical path name for a class implementing IEndpointSnitch
    `dynamic` - boolean that decides whether dynamicsnitch is used or not
    `dynamicUpdateInterval` - integer, in ms (default 100)
    `dynamicResetInterval` - integer, in ms (default 600,000)
    `dynamicBadnessThreshold` - double, (default 0.0)
  Throws:
    `ConfigurationException` - classname not found on classpath

### flushLargestMemtables

    public void flushLargestMemtables()

  Flushes the two largest memtables by ops and by throughput

### calculateStreamAndFetchRanges

    public Pair<java.util.Set<Range<Token>>,java.util.Set<Range<Token>>> calculateStreamAndFetchRanges(java.util.Collection<Range<Token>> current,
                                                                                                       java.util.Collection<Range<Token>> updated)

  Calculate pair of ranges to stream/fetch for given two range collections (current ranges for table and ranges after move to new token)

  Parameters:
    `current` - collection of the ranges by current token
    `updated` - collection of the ranges after token is changed
  Returns:
    pair of ranges to stream/fetch for given current and updated range collections

### bulkLoad

    public void bulkLoad(java.lang.String directory)

  Specified by:
    `bulkLoad` in interface `StorageServiceMBean`

### getExceptionCount

    public int getExceptionCount()

  Specified by:
    `getExceptionCount` in interface `StorageServiceMBean`

### rescheduleFailedDeletions

    public void rescheduleFailedDeletions()

  Specified by:
    `rescheduleFailedDeletions` in interface `StorageServiceMBean`

### loadNewSSTables

    public void loadNewSSTables(java.lang.String ksName,
                                java.lang.String cfName)

  #Load new SSTables to the given keyspace/columnFamily

  Specified by:
    `loadNewSSTables` in interface `StorageServiceMBean`
  Parameters:
    `ksName` - The parent keyspace name
    `cfName` - The ColumnFamily name where SSTables belong

### sampleKeyRange

    public java.util.List<java.lang.String> sampleKeyRange()

  #Return a List of Tokens representing a sample of keys across all ColumnFamilyStores. Note: this should be left as an operation, not an attribute (methods starting with "get") to avoid sending potentially multiple MB of data when accessing this mbean by default. See CASSANDRA-4452.

  Specified by:
    `sampleKeyRange` in interface `StorageServiceMBean`
  Returns:
    set of Tokens as Strings

### rebuildSecondaryIndex

    public void rebuildSecondaryIndex(java.lang.String ksName,
                                      java.lang.String cfName,
                                      java.lang.String... idxNames)

  Description copied from interface: `StorageServiceMBean`
  rebuild the specified indexes

  Specified by:
    `rebuildSecondaryIndex` in interface `StorageServiceMBean`

### resetLocalSchema

    public void resetLocalSchema()
                          throws java.io.IOException

  Specified by:
    `resetLocalSchema` in interface `StorageServiceMBean`
  Throws:
    `java.io.IOException`

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