org.apache.hadoop.hbase.coprocessor

接口 RegionCoprocessorEnvironment

所有超级接口:

CoprocessorEnvironment

@InterfaceAudience.LimitedPrivate(value="Coprocesssor")
@InterfaceStability.Evolving
public interface RegionCoprocessorEnvironment
extends CoprocessorEnvironment

方法概要

方法

限定符和类型	方法和说明
MetricRegistry	getMetricRegistryForRegionServer() Returns a MetricRegistry that can be used to track metrics at the region server level.
Region	getRegion()
HRegionInfo	getRegionInfo()
RegionServerServices	getRegionServerServices()
ConcurrentMap<String,Object>	getSharedData()

从接口继承的方法 org.apache.hadoop.hbase.CoprocessorEnvironment

getClassLoader, getConfiguration, getHBaseVersion, getInstance, getLoadSequence, getPriority, getTable, getTable, getVersion

方法详细资料

getRegion

Region getRegion()

返回:

the region associated with this coprocessor

getRegionInfo

HRegionInfo getRegionInfo()

返回:

region information for the region this coprocessor is running on

getRegionServerServices

RegionServerServices getRegionServerServices()

返回:

reference to the region server services

getSharedData

ConcurrentMap<String,Object> getSharedData()

返回:

shared data between all instances of this coprocessor

getMetricRegistryForRegionServer

MetricRegistry getMetricRegistryForRegionServer()

Returns a MetricRegistry that can be used to track metrics at the region server level. All metrics tracked at this level will be shared by all the coprocessor instances of the same class in the same region server process. Note that there will be one region coprocessor environment per region in the server, but all of these instances will share the same MetricRegistry. The metric instances (like Counter, Timer, etc) will also be shared among all of the region coprocessor instances.

See ExampleRegionObserverWithMetrics class in the hbase-examples modules to see examples of how metrics can be instantiated and used.

返回:

A MetricRegistry for the coprocessor class to track and export metrics.