Package org.apache.solr.metrics

Class MetricsMap

java.lang.Object

org.apache.solr.metrics.MetricsMap

All Implemented Interfaces:

com.codahale.metrics.Gauge<Map<String,Object>>, com.codahale.metrics.Metric, DynamicMBean, org.apache.solr.common.MapSerializable, org.apache.solr.common.MapWriter, org.apache.solr.common.NavigableObject, org.noggit.JSONWriter.Writable

public class MetricsMap
extends Object
implements com.codahale.metrics.Gauge<Map<String,Object>>, org.apache.solr.common.MapWriter, DynamicMBean

Dynamically constructed map of metrics, intentionally different from MetricSet where each metric had to be known in advance and registered separately in MetricRegistry.

Note: this awkwardly extends Gauge and not Metric because awkwardly Metric instances are not supported by MetricRegistryListener :(

Note 2: values added to this metric map should belong to the list of types supported by JMX: OpenType.ALLOWED_CLASSNAMES_LIST, otherwise only their toString() representation will be shown in JConsole.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.solr.common.MapWriter

org.apache.solr.common.MapWriter.EntryWriter

Field Summary

Fields inherited from interface org.apache.solr.common.MapWriter

EMPTY

Constructor Summary

Constructors

Constructor	Description
MetricsMap(org.apache.solr.common.MapWriter initializer)	Create an instance that reports values to a MapWriter.

Method Summary

Modifier and Type	Method	Description
Object	getAttribute(String attribute)
AttributeList	getAttributes(String[] attributes)
MBeanInfo	getMBeanInfo()
Map<String,Object>	getValue()
Map<String,Object>	getValue(boolean detailed)
Object	invoke(String actionName, Object[] params, String[] signature)
void	setAttribute(Attribute attribute)
AttributeList	setAttributes(AttributeList attributes)
String	toString()
void	writeMap(org.apache.solr.common.MapWriter.EntryWriter ew)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.solr.common.MapWriter

append, jsonStr, toMap, write

Methods inherited from interface org.apache.solr.common.NavigableObject

_forEachEntry, _forEachEntry, _forEachEntry, _get, _get, _get, _getStr, _getStr, _getStr, _size

Constructor Details

MetricsMap

public MetricsMap(org.apache.solr.common.MapWriter initializer)

Create an instance that reports values to a MapWriter.

Parameters:

initializer - function to populate the MapWriter result.

Method Details

getValue

public Map<String,Object> getValue()

Specified by:

getValue in interface com.codahale.metrics.Gauge<Map<String,Object>>

getValue

public Map<String,Object> getValue(boolean detailed)

toString

public String toString()

Overrides:

toString in class Object

getAttribute

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

Specified by:

getAttribute in interface DynamicMBean

Throws:

AttributeNotFoundException

MBeanException

ReflectionException

setAttribute

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

Specified by:

setAttribute in interface DynamicMBean

Throws:

AttributeNotFoundException

InvalidAttributeValueException

MBeanException

ReflectionException

getAttributes

public AttributeList getAttributes(String[] attributes)

Specified by:

getAttributes in interface DynamicMBean

setAttributes

public AttributeList setAttributes(AttributeList attributes)

Specified by:

setAttributes in interface DynamicMBean

invoke

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

Specified by:

invoke in interface DynamicMBean

Throws:

MBeanException

ReflectionException

getMBeanInfo

public MBeanInfo getMBeanInfo()

Specified by:

getMBeanInfo in interface DynamicMBean

writeMap

public void writeMap(org.apache.solr.common.MapWriter.EntryWriter ew)
              throws IOException

Specified by:

writeMap in interface org.apache.solr.common.MapWriter

Throws:

IOException