javax.management.timer
Interface TimerMBean

All Known Implementing Classes:

Timer

public interface TimerMBean

Exposes the management interface of the timer MBean.

Version:

1.6

Author:

Alessio Menale, Attilio Mattiocco, Chiara Montecchio.

Method Summary

java.lang.Integer	addNotification(java.lang.String type, java.lang.String message, java.lang.Object userData, java.util.Date date) Creates a new timer notification with the specified type, message and userData and inserts it into the list of notifications with a given date and a null period and number of occurences.
java.lang.Integer	addNotification(java.lang.String type, java.lang.String message, java.lang.Object userData, java.util.Date date, long period) Creates a new timer notification with the specified type, message and userData and inserts it into the list of notifications with a given date and period and a null number of occurences.
java.lang.Integer	addNotification(java.lang.String type, java.lang.String message, java.lang.Object userData, java.util.Date date, long period, long nbOccurences) Creates a new timer notification with the specified type, message and userData and inserts it into the list of notifications with a given date, period and number of occurences.
java.util.Vector	getAllNotificationIDs() Gets all timer notification identifiers registered into the list of notifications.
java.util.Date	getDate(java.lang.Integer id) Gets a copy of the date associated to a timer notification.
int	getNbNotifications() Gets the number of timer notifications registered into the list of notifications.
java.lang.Long	getNbOccurences(java.lang.Integer id) Gets a copy of the remaining number of occurences associated to a timer notification.
java.util.Vector	getNotificationIDs(java.lang.String type) Gets all the identifiers of timer notifications corresponding to the specified type.
java.lang.String	getNotificationMessage(java.lang.Integer id) Gets the timer notification detailed message corresponding to the specified identifier.
java.lang.String	getNotificationType(java.lang.Integer id) Gets the timer notification type corresponding to the specified identifier.
java.lang.Object	getNotificationUserData(java.lang.Integer id) Gets the timer notification user data object corresponding to the specified identifier.
java.lang.Long	getPeriod(java.lang.Integer id) Gets a copy of the period (in milliseconds) associated to a timer notification.
boolean	getSendPastNotifications() Gets the flag indicating whether or not the timer sends past notifications.
boolean	isActive() Tests whether the timer MBean is active.
boolean	isEmpty() Tests whether the list of timer notifications is empty.
void	removeAllNotifications() Removes all the timer notifications from the list of notifications and resets the counter used to update the timer notification identifiers.
void	removeNotification(java.lang.Integer id) Removes the timer notification corresponding to the specified identifier from the list of notifications.
void	removeNotifications(java.lang.String type) Removes all the timer notifications corresponding to the specified type from the list of notifications.
void	setSendPastNotifications(boolean value) sets the attribute sendPastNotification, to determine the behavior of the timer when it finds expired notifications
void	start() Starts the timer.
void	stop() stops the timer.

Method Detail

addNotification

public java.lang.Integer addNotification(java.lang.String type,
                                         java.lang.String message,
                                         java.lang.Object userData,
                                         java.util.Date date)
                                  throws java.lang.IllegalArgumentException

Creates a new timer notification with the specified type, message and userData and inserts it into the list of notifications with a given date and a null period and number of occurences. The timer notification will be handled once at the specified date.

Parameters:

type - The timer notification type.

message - The timer notification detailed message.

userData - The timer notification user data object.

date - The date when the notification occurs.

Returns:

The identifier of the new created timer notification.

Throws:

java.lang.IllegalArgumentException - - The date notification is before the current date.

addNotification

public java.lang.Integer addNotification(java.lang.String type,
                                         java.lang.String message,
                                         java.lang.Object userData,
                                         java.util.Date date,
                                         long period)
                                  throws java.lang.IllegalArgumentException

Creates a new timer notification with the specified type, message and userData and inserts it into the list of notifications with a given date and period and a null number of occurences.

Parameters:

type - The timer notification type.

message - The timer notification detailed message.

userData - The timer notification user data object.

date - The date when the notification occurs.

period - The period of the timer notification (in milliseconds).

Returns:

The identifier of the new created timer notification.

Throws:

java.lang.IllegalArgumentException - - The period is negative or the date notification is before the current date.

addNotification

public java.lang.Integer addNotification(java.lang.String type,
                                         java.lang.String message,
                                         java.lang.Object userData,
                                         java.util.Date date,
                                         long period,
                                         long nbOccurences)
                                  throws java.lang.IllegalArgumentException

Creates a new timer notification with the specified type, message and userData and inserts it into the list of notifications with a given date, period and number of occurences. If the timer notification to be inserted has a date that is before the current date, the method attempts to update the notification using the defined period. If the defined period is null, the method generates an exception.

If the timer notification has a non null period, the date of the notification is updated by adding the period until the notification date is later than the current date. The timer notification is then inserted into the list of notifications.

If the specified number of occurences is non null, the previous mechanism is employed. The number of times that the period is added is limited by the specified number of occurences. If the notification date remains earlier than the current date, an exception is generated.

Note that once the timer notification has been added into the list of notifications, its associated date, period and number of occurences cannot be updated.

Parameters:

type - The timer notification type.

message - The timer notification detailed message.

userData - The timer notification user data object.

date - The date when the notification occurs.

period - The period of the timer notification (in milliseconds).

nbOccurences - The total number the timer notification will be emitted.

Returns:

The identifier of the new created timer notification.

Throws:

java.lang.IllegalArgumentException - - The period or the number of occurences is negative or the date notification is before the current date.

getAllNotificationIDs

public java.util.Vector getAllNotificationIDs()

Gets all timer notification identifiers registered into the list of notifications.

Returns:

A vector of Integer objects containing all the timer notification identifiers. The vector is empty if there is no timer notification registered for this timer MBean.

getDate

public java.util.Date getDate(java.lang.Integer id)

Gets a copy of the date associated to a timer notification.

Parameters:

id - The timer notification identifier.

Returns:

A copy of the date or null if the identifier is not mapped to any timer notification registered for this timer MBean.

getNbNotifications

public int getNbNotifications()

Gets the number of timer notifications registered into the list of notifications.

Returns:

The number of timer notifications

getNbOccurences

public java.lang.Long getNbOccurences(java.lang.Integer id)

Gets a copy of the remaining number of occurences associated to a timer notification.

Parameters:

id - The timer notification identifier.

Returns:

A copy of the remaining number of occurences or null if the identifier is not mapped to any timer notification registered for this timer MBean.

getNotificationIDs

public java.util.Vector getNotificationIDs(java.lang.String type)

Gets all the identifiers of timer notifications corresponding to the specified type.

Parameters:

type - The timer notification type..

Returns:

A vector of Integer objects containing all the identifiers of timer notifications with the specified type. The vector is empty if there is no timer notifications registered for this timer MBean with the specified type.

getNotificationMessage

public java.lang.String getNotificationMessage(java.lang.Integer id)

Gets the timer notification detailed message corresponding to the specified identifier.

Parameters:

id - The timer notification identifier.

Returns:

The timer notification detailed message or null if the identifier is not mapped to any timer notification registered for this timer MBean.

getNotificationType

public java.lang.String getNotificationType(java.lang.Integer id)

Gets the timer notification type corresponding to the specified identifier.

Parameters:

id - The timer notification identifier.

Returns:

The timer notification type or null if the identifier is not mapped to any timer notification registered for this timer MBean.

getNotificationUserData

public java.lang.Object getNotificationUserData(java.lang.Integer id)

Gets the timer notification user data object corresponding to the specified identifier.

Parameters:

id - The timer notification identifier.

Returns:

The timer notification user data object or null if the identifier is not mapped to any timer notification registered for this timer MBean.

getPeriod

public java.lang.Long getPeriod(java.lang.Integer id)

Gets a copy of the period (in milliseconds) associated to a timer notification.

Parameters:

id - The timer notification identifier.

Returns:

A copy of the period or null if the identifier is not mapped to any timer notification registered for this timer MBean.

getSendPastNotifications

public boolean getSendPastNotifications()

Gets the flag indicating whether or not the timer sends past notifications.

Returns:

The value of the attribute setSendPastNotification

isActive

public boolean isActive()

Tests whether the timer MBean is active. A timer MBean is marked active when the start method is called. It becomes inactive when the stop method is called.

Returns:

true if the timer is started, otherwise false

isEmpty

public boolean isEmpty()

Tests whether the list of timer notifications is empty.

Returns:

true if the timerNotifications list is empty

removeAllNotifications

public void removeAllNotifications()

Removes all the timer notifications from the list of notifications and resets the counter used to update the timer notification identifiers.

removeNotification

public void removeNotification(java.lang.Integer id)
                        throws InstanceNotFoundException

Removes the timer notification corresponding to the specified identifier from the list of notifications.

Parameters:

id - The timer notification identifier.

Throws:

InstanceNotFoundException - - The specified identifier does not correspond to any timer notification in the list of notifications of this timer MBean.

removeNotifications

public void removeNotifications(java.lang.String type)
                         throws InstanceNotFoundException

Removes all the timer notifications corresponding to the specified type from the list of notifications.

Parameters:

type - The timer notification type.

Throws:

IInstanceNotFoundException - - The specified type does not correspond to any timer notification in the list of notifications of this timer MBean.

setSendPastNotifications

public void setSendPastNotifications(boolean value)

sets the attribute sendPastNotification, to determine the behavior of the timer when it finds expired notifications

Parameters:

value - The past notifications sending on/off flag value.

start

public void start()

Starts the timer. If there is one or more timer notifications before the time in the list of notifications, the notification is sent according to the sendPastNotifications flag and then, updated according to its period and remaining number of occurences. If the timer notification date remains earlier than the current date, this notification is just removed from the list of notifications.

stop

public void stop()

stops the timer.