org.javasimon.source
Class CachedMonitorSource<L,M extends Simon,K>

java.lang.Object
  org.javasimon.source.CachedMonitorSource<L,M,K>

Type Parameters:

L - Location/invocation context

M - Simon type

K - Location key

All Implemented Interfaces:

MonitorSource<L,M>

Direct Known Subclasses:

CachedStopwatchSource

public abstract class CachedMonitorSource<L,M extends Simon,K>
extends Object
implements MonitorSource<L,M>

Monitor source playing the role of cache for delegate monitor source.

Author:

gquintana

Nested Class Summary

private static class

CachedMonitorSource.MonitorInformation Monitor/location information.

Field Summary

private MonitorSource<L,M>	delegate Real monitor source.
private Map<K,CachedMonitorSource.MonitorInformation>	monitorInformations Map location key → monitor information.
private static CachedMonitorSource.MonitorInformation	NULL_MONITOR_INFORMATION Not monitored monitor information.

Constructor Summary

CachedMonitorSource(MonitorSource<L,M> delegate)
Constructor with real MonitorSource.

Method Summary

protected abstract K	getLocationKey(L location) Get location for given location.
Manager	getManager() Returns the Manager used as a real source of monitors.
M	getMonitor(L location) Get Simon for the specified location.
private CachedMonitorSource.MonitorInformation	getMonitorInformation(L location) Get monitor information for given location.
private M	getMonitorOnce(L location)
boolean	isMonitored(L location) Check whether location should be monitored.
private void	removeMonitorInformation(L location) Remove monitor information for given location.

Methods inherited from class java.lang.Object

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

Field Detail

delegate

private final MonitorSource<L,M extends Simon> delegate

Real monitor source.

NULL_MONITOR_INFORMATION

private static final CachedMonitorSource.MonitorInformation NULL_MONITOR_INFORMATION

Not monitored monitor information.

monitorInformations

private final Map<K,CachedMonitorSource.MonitorInformation> monitorInformations

Map location key → monitor information.

Constructor Detail

CachedMonitorSource

public CachedMonitorSource(MonitorSource<L,M> delegate)

Constructor with real MonitorSource.

Parameters:

delegate - Delegate provider monitors for real

Method Detail

getLocationKey

protected abstract K getLocationKey(L location)

Get location for given location.

getMonitorInformation

private CachedMonitorSource.MonitorInformation getMonitorInformation(L location)

Get monitor information for given location. First monitor information is looked up in cache. Then, when not found, delegate is called.

Parameters:

location - Location

Returns:

Monitor information

removeMonitorInformation

private void removeMonitorInformation(L location)

Remove monitor information for given location.

isMonitored

public boolean isMonitored(L location)

Check whether location should be monitored. Response is entirely based on cache

Specified by:

isMonitored in interface MonitorSource<L,M extends Simon>

Parameters:

location - Location

Returns:

true means monitored

getMonitorOnce

private M getMonitorOnce(L location)

getMonitor

public M getMonitor(L location)

Get Simon for the specified location. Simon is retrieved from name in cache.

Specified by:

getMonitor in interface MonitorSource<L,M extends Simon>

Parameters:

location - Location

Returns:

Simon for the specified location

getManager

public Manager getManager()

Description copied from interface: MonitorSource

Returns the Manager used as a real source of monitors.

Specified by:

getManager in interface MonitorSource<L,M extends Simon>

Returns:

Manager to get the monitors from