net.java.dev.moskito.core.stats.impl
Class IntervalRegistry

java.lang.Object
  net.java.dev.moskito.core.stats.impl.IntervalRegistry

public class IntervalRegistry
extends Object

This class implements a registry singleton to hold and create Interval instances.

Author:

dvayanu

Field Summary

private static IntervalRegistry	instance This is the instance of the singleton.
private Map<Integer,Interval>	intervalsById This Map holds all Intervals by their ids.
private Map<String,Interval>	intervalsByName This Map holds all Intervals by their names.
private AtomicInteger	nextId This is a Thread-safe counter to generate VM-wide uniqe ids for new Interval instances.
private List<IntervalRegistryListener>	registryListeners This List holds all registered IntervalRegistryListeners.
private IUpdateTriggerService	updateTriggerService This is a time control serive for periodic call backs.

Constructor Summary

private

IntervalRegistry() The contructor.

Method Summary

private Interval	createInterval(String aName, int aLength) This method creates a new Interval with the given name and length.
static IntervalRegistry	getInstance() This is the Singleton instance accessor method.
(package private) Interval	getInterval(int aId) This method retrieves an Interval with the given id.
Interval	getInterval(String aName) This method retrieves an Interval with the given name.
Interval	getInterval(String aName, int aLength) This method retrieves an Interval with the given name.
List<Interval>	getIntervals() This method returns a list containing all known Intervals.
private int	obtainNextUniqueId() This method returns the next free id.

Methods inherited from class java.lang.Object

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

Field Detail

instance

private static IntervalRegistry instance

This is the instance of the singleton.

intervalsById

private Map<Integer,Interval> intervalsById

This Map holds all Intervals by their ids.

intervalsByName

private Map<String,Interval> intervalsByName

This Map holds all Intervals by their names.

nextId

private AtomicInteger nextId

This is a Thread-safe counter to generate VM-wide uniqe ids for new Interval instances.

updateTriggerService

private IUpdateTriggerService updateTriggerService

This is a time control serive for periodic call backs.

registryListeners

private List<IntervalRegistryListener> registryListeners

This List holds all registered IntervalRegistryListeners.

See Also:

IntervalRegistryListener

Constructor Detail

IntervalRegistry

private IntervalRegistry()

The contructor.

Method Detail

getInstance

public static IntervalRegistry getInstance()

This is the Singleton instance accessor method.

Returns:

the IntervalRegistry instance.

getInterval

Interval getInterval(int aId)

This method retrieves an Interval with the given id.

Parameters:

aId - the Interval id

Returns:

the found Interval

Throws:

UnknownIntervalException - if no Interval with the given id could be found

getInterval

public Interval getInterval(String aName,
                            int aLength)

This method retrieves an Interval with the given name. If no one could be found it will create a new Interval with given name and length. TODO: This method should be renamed to "getOrCreateInterval" or something like that TODO: This method MUST be synchonrized to avoid doublicate Interval instances....

Parameters:

aName - the Interval name

aLength - the length of the new Interval in seconds.

Returns:

the existing Interval or a new Interval with given name and length

getInterval

public Interval getInterval(String aName)

This method retrieves an Interval with the given name. If no one could be found it will create a new Interval with given name - the length will be a guess. TODO: This method should be renamed to "getOrCreateInterval" or something like that TODO: This method MUST be synchonrized to avoid double Interval instances....

Parameters:

aName - the Interval name

Returns:

the existing Interval or a new Interval with given name and guessed length

createInterval

private Interval createInterval(String aName,
                                int aLength)

This method creates a new Interval with the given name and length.

Parameters:

aName - the name of the new Interval

aLength - the length of the Interval in seconds

Returns:

the new Interval

obtainNextUniqueId

private int obtainNextUniqueId()

This method returns the next free id.

Returns:

the next id

getIntervals

public List<Interval> getIntervals()

This method returns a list containing all known Intervals.

Returns:

the Interval list