io.pcp.parfait

Class SettableValue<T>

java.lang.Object

io.pcp.parfait.AbstractMonitorable<T>

io.pcp.parfait.SettableValue<T>

All Implemented Interfaces:

Monitorable<T>

Direct Known Subclasses:

MonitoredConstant, MonitoredValue, PollingMonitoredValue

abstract class SettableValue<T>
extends AbstractMonitorable<T>

A base class for Monitorables which can have their value set to an arbitrary value at runtime.

Field Summary

Fields

Modifier and Type	Field and Description
protected T	value

Fields inherited from class io.pcp.parfait.AbstractMonitorable

LOG

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SettableValue(java.lang.String name, java.lang.String description, MonitorableRegistry registry, T initialValue, javax.measure.Unit<?> unit, ValueSemantics semantics)

Method Summary

Modifier and Type	Method and Description
T	get() This method should never block and must return as quickly as possible.
void	set(T newValue) Sets the current value of this Monitorable.

Methods inherited from class io.pcp.parfait.AbstractMonitorable

attachMonitor, getDescription, getName, getSemantics, getType, getUnit, isAttached, logValue, notifyMonitors, registerSelf, removeMonitor

Methods inherited from class java.lang.Object

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

Field Detail

value

protected volatile T value

Constructor Detail

SettableValue

protected SettableValue(java.lang.String name,
                        java.lang.String description,
                        MonitorableRegistry registry,
                        T initialValue,
                        javax.measure.Unit<?> unit,
                        ValueSemantics semantics)

Method Detail

get

public T get()

Description copied from interface: Monitorable

This method should never block and must return as quickly as possible.

Returns:

the current value of this Monitorable.

set

public void set(T newValue)

Sets the current value of this Monitorable. Some level of optimization is performed to ensure that spurious updates are not sent out (i.e. when the new value is the same as the old), but this is optimized for performance and no guarantee is made that such notifications will not be sent.