forward.server
Class ForwardSchedulerStatistics

java.lang.Object
  forward.server.ForwardSchedulerStatistics

public class ForwardSchedulerStatistics
extends java.lang.Object

This is the implementation for the statistics of a ForwardScheduler.

Field Summary

private static long	BANDWIDTH_STATISTICS_INTERVAL The backwards interval in milliseconds over which the current bandwidth usage statistics are created.
private int	m_acceptedConnections Stores the number of accepted connections.
private java.util.Vector	m_lastTransferVolumes Stores the list with the last transfered byte amounts.
private int	m_rejectedConnections Stores the number of rejected connections.
private long	m_transferedBytes Stores the number of transfered bytes.

Constructor Summary

ForwardSchedulerStatistics()
Creates a new ForwardSchedulerStatistics instance.

Method Summary

int	getAcceptedConnections() Returns the number of accepted connections.
int	getCurrentBandwidthUsage() Returns the current bandwidth usage.
int	getRejectedConnections() Returns the number of rejected connections.
long	getTransferedBytes() Returns the total number of transfered bytes.
void	incrementAcceptedConnections() Increments the number of accepted connections by one.
void	incrementRejectedConnections() Increments the number of rejected connections by one.
void	incrementTransferVolume(int a_volume) Increments the number of transfered bytes and adds the transfer volume to the list of volumes for calculating the current bandwidth usage.
private void	removeOutdatedTransferVolumes() Removes all outdated values from the list of currently transfered volumes.

Methods inherited from class java.lang.Object

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

Field Detail

BANDWIDTH_STATISTICS_INTERVAL

private static final long BANDWIDTH_STATISTICS_INTERVAL

The backwards interval in milliseconds over which the current bandwidth usage statistics are created.

See Also:

Constant Field Values

m_rejectedConnections

private int m_rejectedConnections

Stores the number of rejected connections.

m_acceptedConnections

private int m_acceptedConnections

Stores the number of accepted connections.

m_transferedBytes

private long m_transferedBytes

Stores the number of transfered bytes.

m_lastTransferVolumes

private java.util.Vector m_lastTransferVolumes

Stores the list with the last transfered byte amounts. See the constant in this class to see how long every amount is in that list to create the bandwidth usage statistics.

Constructor Detail

ForwardSchedulerStatistics

public ForwardSchedulerStatistics()

Creates a new ForwardSchedulerStatistics instance.

Method Detail

incrementRejectedConnections

public void incrementRejectedConnections()

Increments the number of rejected connections by one.

getRejectedConnections

public int getRejectedConnections()

Returns the number of rejected connections.

Returns:

The number of rejected connections.

incrementAcceptedConnections

public void incrementAcceptedConnections()

Increments the number of accepted connections by one.

getAcceptedConnections

public int getAcceptedConnections()

Returns the number of accepted connections.

Returns:

The number of accepted connections.

incrementTransferVolume

public void incrementTransferVolume(int a_volume)

Increments the number of transfered bytes and adds the transfer volume to the list of volumes for calculating the current bandwidth usage. Also outdated values from that list are removed.

Parameters:

a_volume - A number of currently transfered bytes.

getCurrentBandwidthUsage

public int getCurrentBandwidthUsage()

Returns the current bandwidth usage. It is calculated from the list of currently transfered volumes. See the constant in this class to get the time how long backwards the list stores every transfer volume. First all outdated volumes are removed from the list and the rest is used for calculating the current bandwidth usage.

Returns:

The current bandwidth usage in bytes/sec.

getTransferedBytes

public long getTransferedBytes()

Returns the total number of transfered bytes.

Returns:

The total number of transfered bytes.

removeOutdatedTransferVolumes

private void removeOutdatedTransferVolumes()

Removes all outdated values from the list of currently transfered volumes.