common
Class Statistics

java.lang.Object
  common.Statistics

All Implemented Interfaces:

java.io.Serializable

public class Statistics
extends java.lang.Object
implements java.io.Serializable

This class represents a Statistics object, witch contains statistical data about a Message server, and the static methods and datas to create these object. In particular, it contains a vector that contains the times the messages has been sended at.
Some methods of this class must be called during the Message Server activity, to let the data be updated.

Author:

Marco Cornolti and Alessandro Franchini

See Also:

Serialized Form

Field Summary

private int	cacheEntries
private int	forwardedMessages120Hours
private int	forwardedMessages144Hours
private int	forwardedMessages24Hours
private int	forwardedMessages48Hours
private int	forwardedMessages72Hours
private int	forwardedMessages96Hours
private static java.util.Vector<java.util.Date>	forwardedMessagesDates
private int	forwardedMessagesHour
private int	forwardedMessagesMinute
private long	freeMem
private int	managedUsers
private int	onlineManagedUsers
private int	queuedMsgsN
private static long	serialVersionUID

Constructor Summary

Statistics(int cacheEntries, int managedUsers, int onlineManagedUsers, int queuedMsgsN)

Method Summary

private static int	forwardedMessagesSince(int min) Returns the number of messages forwarded since min minutes ago.
private static int	fwMessSinceRec(java.util.Date from, int start, int end) Returns the number of dates present in the forwardedMessagesDates after the date given by argument.
static int	get24HourFwMsgs()
int	getCacheEntries()
int	getForwardedMessages120Hours()
int	getForwardedMessages144Hours()
int	getForwardedMessages24Hours()
int	getForwardedMessages48Hours()
int	getForwardedMessages72Hours()
int	getForwardedMessages96Hours()
int	getForwardedMessagesHour()
int	getForwardedMessagesMinute()
long	getFreeMem()
int	getManagedUsers()
int	getOnlineManagedUsers()
int	getQueuedMessageNumber()
static void	increaseForwardedMessages() Must be called whenever a new message is forwarded.

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

forwardedMessagesDates

private static java.util.Vector<java.util.Date> forwardedMessagesDates

cacheEntries

private int cacheEntries

managedUsers

private int managedUsers

onlineManagedUsers

private int onlineManagedUsers

queuedMsgsN

private int queuedMsgsN

forwardedMessagesMinute

private int forwardedMessagesMinute

forwardedMessagesHour

private int forwardedMessagesHour

forwardedMessages24Hours

private int forwardedMessages24Hours

forwardedMessages48Hours

private int forwardedMessages48Hours

forwardedMessages72Hours

private int forwardedMessages72Hours

forwardedMessages96Hours

private int forwardedMessages96Hours

forwardedMessages120Hours

private int forwardedMessages120Hours

forwardedMessages144Hours

private int forwardedMessages144Hours

freeMem

private long freeMem

Constructor Detail

Statistics

public Statistics(int cacheEntries,
                  int managedUsers,
                  int onlineManagedUsers,
                  int queuedMsgsN)

Parameters:

cacheEntries - the entries in the MS cache (user-MS corrispondences)

managedUsers - the number of managed users.

onlineManagedUsers - the number of online managed users.

queuedMsgsN - the number of messages contained in the users' queues.

Method Detail

forwardedMessagesSince

private static int forwardedMessagesSince(int min)

Returns the number of messages forwarded since min minutes ago. Takes O(logN) where N is the number of messages forwarding dates in the vector.

Parameters:

min - the minutes of the mesaurement.

Returns:

the number of messages forwarded in the last min minutes.

fwMessSinceRec

private static int fwMessSinceRec(java.util.Date from,
                                  int start,
                                  int end)

Returns the number of dates present in the forwardedMessagesDates after the date given by argument. The range of positions the algorithm has to search must be specified. The vector must be ordered (most recent date in the last position). This method takes O(logN) where N is the number of dates in the vector.

Parameters:

from - the date to start counting by.

start - the first index of the searching range.

end - the last index of the searching range.

Returns:

the number of messages forwarded from the date from, witch is included in the range start-end.

getCacheEntries

public int getCacheEntries()

Returns:

the number of cache entries contained in this statistics.

getFreeMem

public long getFreeMem()

Returns:

the amount of free memory.

getManagedUsers

public int getManagedUsers()

Returns:

the number of managed users.

getOnlineManagedUsers

public int getOnlineManagedUsers()

Returns:

the number of online managed users.

getQueuedMessageNumber

public int getQueuedMessageNumber()

Returns:

the number of queued messages.

getForwardedMessagesMinute

public int getForwardedMessagesMinute()

Returns:

the amount of messages forwarded in the last minute.

getForwardedMessagesHour

public int getForwardedMessagesHour()

Returns:

the amount of messages forwarded in the last hour.

getForwardedMessages24Hours

public int getForwardedMessages24Hours()

Returns:

the amount of messages forwarded in the last day.

getForwardedMessages48Hours

public int getForwardedMessages48Hours()

Returns:

the amount of messages forwarded in the last 2 days.

getForwardedMessages72Hours

public int getForwardedMessages72Hours()

Returns:

the amount of messages forwarded in the last 3 days.

getForwardedMessages96Hours

public int getForwardedMessages96Hours()

Returns:

the amount of messages forwarded in the last 4 days.

getForwardedMessages120Hours

public int getForwardedMessages120Hours()

Returns:

the amount of messages forwarded in the last 5 days.

getForwardedMessages144Hours

public int getForwardedMessages144Hours()

Returns:

the amount of messages forwarded in the last 6 days.

increaseForwardedMessages

public static void increaseForwardedMessages()

Must be called whenever a new message is forwarded. Adds the current time to the vector.

get24HourFwMsgs

public static int get24HourFwMsgs()

Returns:

the amount of messages forwarded in the last 24 hours.