Package com.mapr.org.apache.hadoop.metrics.util

Class MetricsDynamicMBeanBase

java.lang.Object

com.mapr.org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase

All Implemented Interfaces:

DynamicMBean

@LimitedPrivate({"HDFS","MapReduce"})
public abstract class MetricsDynamicMBeanBase
extends Object
implements DynamicMBean

This abstract base class facilitates creating dynamic mbeans automatically from metrics. The metrics constructors registers metrics in a registry. Different categories of metrics should be in differnt classes with their own registry (as in NameNodeMetrics and DataNodeMetrics). Then the MBean can be created passing the registry to the constructor. The MBean should be then registered using a mbean name (example): MetricsHolder myMetrics = new MetricsHolder(); // has metrics and registry MetricsTestMBean theMBean = new MetricsTestMBean(myMetrics.mregistry); ObjectName mbeanName = MBeanUtil.registerMBean("ServiceFoo", "TestStatistics", theMBean);

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	MetricsDynamicMBeanBase(MetricsRegistry mr, String aMBeanDescription)

Method Summary

Modifier and Type	Method	Description
Object	getAttribute(String attributeName)
AttributeList	getAttributes(String[] attributeNames)
MBeanInfo	getMBeanInfo()
Object	invoke(String actionName, Object[] parms, String[] signature)
void	setAttribute(Attribute attribute)
AttributeList	setAttributes(AttributeList attributes)

Methods inherited from class java.lang.Object

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

Constructor Details

MetricsDynamicMBeanBase

protected MetricsDynamicMBeanBase(MetricsRegistry mr,
 String aMBeanDescription)

Method Details

getAttribute

public Object getAttribute(String attributeName)
                    throws AttributeNotFoundException,
MBeanException,
ReflectionException

Specified by:

getAttribute in interface DynamicMBean

Throws:

AttributeNotFoundException

MBeanException

ReflectionException

getAttributes

public AttributeList getAttributes(String[] attributeNames)

Specified by:

getAttributes in interface DynamicMBean

getMBeanInfo

public MBeanInfo getMBeanInfo()

Specified by:

getMBeanInfo in interface DynamicMBean

invoke

public Object invoke(String actionName,
 Object[] parms,
 String[] signature)
              throws MBeanException,
ReflectionException

Specified by:

invoke in interface DynamicMBean

Throws:

MBeanException

ReflectionException

setAttribute

public void setAttribute(Attribute attribute)
                  throws AttributeNotFoundException,
InvalidAttributeValueException,
MBeanException,
ReflectionException

Specified by:

setAttribute in interface DynamicMBean

Throws:

AttributeNotFoundException

InvalidAttributeValueException

MBeanException

ReflectionException

setAttributes

public AttributeList setAttributes(AttributeList attributes)

Specified by:

setAttributes in interface DynamicMBean