net.centro.rtb.monitoringcenter.util

Class JmxUtil

java.lang.Object

net.centro.rtb.monitoringcenter.util.JmxUtil

public class JmxUtil
extends Object

Method Summary

Modifier and Type	Method and Description
static <T> T	getJmxAttribute(ObjectName targetObjectName, String attributeName, Class<T> attributeClass, T defaultValue) Retrieves the value of a JMX attribute.
static <T> com.codahale.metrics.Gauge<T>	getJmxAttributeAsGauge(ObjectName targetObjectName, String attributeName, Class<T> attributeClass, T gaugeDefaultValue) Creates a Gauge representing the value of a JMX attribute.

Methods inherited from class java.lang.Object

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

Method Detail

getJmxAttributeAsGauge

public static <T> com.codahale.metrics.Gauge<T> getJmxAttributeAsGauge(ObjectName targetObjectName,
                                                                       String attributeName,
                                                                       Class<T> attributeClass,
                                                                       T gaugeDefaultValue)

Creates a Gauge representing the value of a JMX attribute. If the attribute is not found or it is of a different type, null will be returned to signify absence of value. Default value will be returned by the Gauge, if an exception occurs within the Gauge's getValue() method.

Type Parameters:

T - type of the JMX attribute's value.

Parameters:

targetObjectName - JMX ObjectName to query.

attributeName - name of the JMX attribute.

attributeClass - class of the JMX attribute's value.

gaugeDefaultValue - default value to be returned by the gauge.

Returns:

Gauge representing the value of a JMX attribute or null if the attribute is absent or of different type

getJmxAttribute

public static <T> T getJmxAttribute(ObjectName targetObjectName,
                                    String attributeName,
                                    Class<T> attributeClass,
                                    T defaultValue)

Retrieves the value of a JMX attribute. If the attribute is not found or it is of a different type, defaultValue will be returned if the attribute is absent or of different type.

Type Parameters:

T - type of the JMX attribute's value.

Parameters:

targetObjectName - JMX ObjectName to query.

attributeName - name of the JMX attribute.

attributeClass - class of the JMX attribute's value.

defaultValue - default value to be returned if the JMX attribute is absent or of different type.

Returns:

value of a JMX attribute or defaultValue if the attribute is absent or of different type.