org.apache.commons.monitoring.impl.monitors
Class CreateValuesOnDemandMonitor

java.lang.Object
  org.apache.commons.monitoring.impl.monitors.AbstractMonitor
      org.apache.commons.monitoring.impl.monitors.ObservableMonitor
          org.apache.commons.monitoring.impl.monitors.CreateValuesOnDemandMonitor

All Implemented Interfaces:

Monitor, Monitor.Observable

Direct Known Subclasses:

CompositeValuesMonitor

public class CreateValuesOnDemandMonitor
extends ObservableMonitor

implementation of the Monitor interface that creates StatValues on demand. The application can request for Counters/Gauges without having to handle instantiation of monitors with all required StatValues pre-registered.

Author:

Nicolas De Loof

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.commons.monitoring.Monitor

Monitor.Key, Monitor.Listener, Monitor.Observable

Field Summary

Fields inherited from interface org.apache.commons.monitoring.Monitor

CONCURRENCY, FAILURES, PERFORMANCES

Constructor Summary

CreateValuesOnDemandMonitor(Monitor.Key key)

Method Summary

Counter	getCounter(Role<Counter> role) Retrieve a Counter or create a new one for the role
Gauge	getGauge(Role<Gauge> role) Retrieve a Gauge or create a new one for the role
protected Counter	newCounterInstance(Role<Counter> role) Create a new Counter instance
protected Gauge	newGaugeInstance(Role<Gauge> role) Create a new Gauge instance

Methods inherited from class org.apache.commons.monitoring.impl.monitors.ObservableMonitor

addListener, register, removeListener

Methods inherited from class org.apache.commons.monitoring.impl.monitors.AbstractMonitor

getCounter, getGauge, getKey, getRoles, getValue, getValue, getValues, reset

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.monitoring.Monitor

getCounter, getGauge, getKey, getRoles, getValue, getValue, getValues, reset

Constructor Detail

CreateValuesOnDemandMonitor

public CreateValuesOnDemandMonitor(Monitor.Key key)

Method Detail

getCounter

public Counter getCounter(Role<Counter> role)

Retrieve a Counter or create a new one for the role

Specified by:

getCounter in interface Monitor

Overrides:

getCounter in class AbstractMonitor

Parameters:

role - the Counter role in the monitor

Returns:

the Counter

newCounterInstance

protected Counter newCounterInstance(Role<Counter> role)

Create a new Counter instance

getGauge

public Gauge getGauge(Role<Gauge> role)

Retrieve a Gauge or create a new one for the role

Specified by:

getGauge in interface Monitor

Overrides:

getGauge in class AbstractMonitor

Parameters:

role - the gauge role in the monitor

Returns:

the Gauge

newGaugeInstance

protected Gauge newGaugeInstance(Role<Gauge> role)

Create a new Gauge instance