org.apache.hadoop.hbase

Class ClusterStatus

java.lang.Object

org.apache.hadoop.io.VersionedWritable

org.apache.hadoop.hbase.ClusterStatus

All Implemented Interfaces:

org.apache.hadoop.io.Writable

@InterfaceAudience.Public
@InterfaceStability.Evolving
public class ClusterStatus
extends org.apache.hadoop.io.VersionedWritable

Status information on the HBase cluster.

ClusterStatus provides clients with information such as:

• The count and names of region servers in the cluster.
• The count and names of dead region servers in the cluster.
• The name of the active master for the cluster.
• The name(s) of the backup master(s) for the cluster, if they exist.
• The average cluster load.
• The number of regions deployed on the cluster.
• The number of requests since last report.
• Detailed region server loading and resource usage information, per server and per region.
• Regions in transition at master
• The unique cluster ID

Constructor Summary

Constructors

Constructor and Description
ClusterStatus() Deprecated. Used by Writables and Writables are going away.
ClusterStatus(String hbaseVersion, String clusterid, Map<ServerName,ServerLoad> servers, Collection<ServerName> deadServers, ServerName master, Collection<ServerName> backupMasters, Map<String,RegionState> rit, String[] masterCoprocessors, Boolean balancerOn)

Method Summary

Methods

Modifier and Type	Method and Description
ClusterStatusProtos.ClusterStatus	convert() Convert a ClusterStatus to a protobuf ClusterStatus
static ClusterStatus	convert(ClusterStatusProtos.ClusterStatus proto) Convert a protobuf ClusterStatus to a ClusterStatus
boolean	equals(Object o)
double	getAverageLoad()
Collection<ServerName>	getBackupMasters()
int	getBackupMastersSize()
Boolean	getBalancerOn()
String	getClusterId()
Collection<ServerName>	getDeadServerNames()
int	getDeadServers()
String	getHBaseVersion()
ServerLoad	getLoad(ServerName sn)
ServerName	getMaster() Returns detailed information about the current master ServerName.
String[]	getMasterCoprocessors()
int	getRegionsCount()
Map<String,RegionState>	getRegionsInTransition()
int	getRequestsCount()
Collection<ServerName>	getServerInfo() Deprecated. Use getServers()
Collection<ServerName>	getServers()
int	getServersSize()
byte	getVersion()
int	hashCode()
boolean	isBalancerOn()
String	toString()

Methods inherited from class org.apache.hadoop.io.VersionedWritable

readFields, write

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ClusterStatus

@Deprecated
public ClusterStatus()

Deprecated. Used by Writables and Writables are going away.

Constructor, for Writable

ClusterStatus

public ClusterStatus(String hbaseVersion,
             String clusterid,
             Map<ServerName,ServerLoad> servers,
             Collection<ServerName> deadServers,
             ServerName master,
             Collection<ServerName> backupMasters,
             Map<String,RegionState> rit,
             String[] masterCoprocessors,
             Boolean balancerOn)

Method Detail

getDeadServerNames

public Collection<ServerName> getDeadServerNames()

Returns:

the names of region servers on the dead list

getServersSize

public int getServersSize()

Returns:

the number of region servers in the cluster

getDeadServers

public int getDeadServers()

Returns:

the number of dead region servers in the cluster

getAverageLoad

public double getAverageLoad()

Returns:

the average cluster load

getRegionsCount

public int getRegionsCount()

Returns:

the number of regions deployed on the cluster

getRequestsCount

public int getRequestsCount()

Returns:

the number of requests since last report

getHBaseVersion

public String getHBaseVersion()

Returns:

the HBase version string as reported by the HMaster

equals

public boolean equals(Object o)

Overrides:

equals in class Object

See Also:

Object.equals(java.lang.Object)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

See Also:

Object.hashCode()

getVersion

public byte getVersion()

Specified by:

getVersion in class org.apache.hadoop.io.VersionedWritable

Returns:

the object version number

getServerInfo

public Collection<ServerName> getServerInfo()

Deprecated. Use getServers()

Returns detailed region server information: A list of ServerName.

Returns:

region server information

getServers

public Collection<ServerName> getServers()

getMaster

public ServerName getMaster()

Returns detailed information about the current master ServerName.

Returns:

current master information if it exists

getBackupMastersSize

public int getBackupMastersSize()

Returns:

the number of backup masters in the cluster

getBackupMasters

public Collection<ServerName> getBackupMasters()

Returns:

the names of backup masters

getLoad

public ServerLoad getLoad(ServerName sn)

Parameters:

sn -

Returns:

Server's load or null if not found.

getRegionsInTransition

@InterfaceAudience.Private
public Map<String,RegionState> getRegionsInTransition()

getClusterId

public String getClusterId()

getMasterCoprocessors

public String[] getMasterCoprocessors()

isBalancerOn

public boolean isBalancerOn()

getBalancerOn

public Boolean getBalancerOn()

toString

public String toString()

Overrides:

toString in class Object

convert

public ClusterStatusProtos.ClusterStatus convert()

Convert a ClusterStatus to a protobuf ClusterStatus

Returns:

the protobuf ClusterStatus

convert

public static ClusterStatus convert(ClusterStatusProtos.ClusterStatus proto)

Convert a protobuf ClusterStatus to a ClusterStatus

Parameters:

proto - the protobuf ClusterStatus

Returns:

the converted ClusterStatus