org.apache.kudu.client

Class Statistics

java.lang.Object

org.apache.kudu.client.Statistics

@InterfaceAudience.Public
 @InterfaceStability.Evolving
public class Statistics
extends Object

A Statistics belongs to a specific AsyncKuduClient. It stores client-level statistics including number of operations, number of bytes written, number of rpcs. It is created along with the client's creation, and can be obtained through AsyncKuduClient or KuduClient's getStatistics method. Once obtained, an instance of this class can be used directly.

This class is thread-safe. The user can use it anywhere to get statistics of this client.

The method toString() can be useful to get a dump of all the metrics aggregated for all the tablets.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Statistics.Statistic The statistic enum to pass when querying.

Constructor Summary

Constructors

Constructor and Description
Statistics()

Method Summary

Modifier and Type	Method and Description
long	getClientStatistic(Statistics.Statistic statistic) Get the statistic count of the whole client.
String	getTableName(String tabletId) Get table name of the given tablet id.
Set<String>	getTableSet() Get the set of tables which have been written into by this client, which have statistics information.
long	getTableStatistic(String tableName, Statistics.Statistic statistic) Get the statistic count of this table.
Set<String>	getTabletSet() Get the set of tablets which have been written into by this client, which have statistics information.
long	getTabletStatistic(String tabletId, Statistics.Statistic statistic) Get the statistic count of this tablet.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Statistics

public Statistics()

Method Detail

getTabletStatistic

public long getTabletStatistic(String tabletId,
                               Statistics.Statistic statistic)

Get the statistic count of this tablet. If the specified tablet doesn't have statistics, 0 will be returned.

Parameters:

tabletId - the tablet's id

statistic - the statistic type to get

Returns:

the value of the statistic

getTableStatistic

public long getTableStatistic(String tableName,
                              Statistics.Statistic statistic)

Get the statistic count of this table.

Parameters:

tableName - the table's name

statistic - the statistic type to get

Returns:

the value of the statistic

getClientStatistic

public long getClientStatistic(Statistics.Statistic statistic)

Get the statistic count of the whole client.

Parameters:

statistic - the statistic type to get

Returns:

the value of the statistic

getTabletSet

public Set<String> getTabletSet()

Get the set of tablets which have been written into by this client, which have statistics information.

Returns:

set of tablet ids

getTableSet

public Set<String> getTableSet()

Get the set of tables which have been written into by this client, which have statistics information.

Returns:

set of table names

getTableName

public String getTableName(String tabletId)

Get table name of the given tablet id. If the tablet has no statistics, null will be returned.

Parameters:

tabletId - the tablet's id

Returns:

table name

toString

public String toString()

Overrides:

toString in class Object