springs.access
Class ReferenceUpdateCommands

java.lang.Object
  |
  +--springs.access.ReferenceUpdateCommands

public class ReferenceUpdateCommands

extends java.lang.Object

Contains instructions to update references to agents. It is implemented as a FIFO queue.

Author:

Sergio Ilarri Artigas

Field Summary

private double	_arrivalRate
private java.util.Vector	_commands
private java.util.Vector	_insertionTimes
private long	_millisFirstCommand
private int	_numArrivedCommands To compute the throughput of commands.

Constructor Summary

ReferenceUpdateCommands()
Constructor.

Method Summary

double	getArrivalRate() Gets the arrival rate of remote tuples, per second.
springs.access.ReferenceUpdateCommand	popCommand() Gets the first command from the table and removes it.
void	removeCommand(java.lang.String agentName) Removes a command that requests the update for an agent with the given name.
void	set(java.lang.String agentName, springs.access.ReferenceUpdateCommand c) Sets the commands for the given agent.
int	size() Gets the number of remote agent references.

Methods inherited from class java.lang.Object

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

Field Detail

_commands

private java.util.Vector _commands

_insertionTimes

private java.util.Vector _insertionTimes

_numArrivedCommands

private int _numArrivedCommands

To compute the throughput of commands.

_arrivalRate

private double _arrivalRate

_millisFirstCommand

private long _millisFirstCommand

Constructor Detail

ReferenceUpdateCommands

public ReferenceUpdateCommands()

Constructor.

Method Detail

set

public void set(java.lang.String agentName,
                springs.access.ReferenceUpdateCommand c)

Sets the commands for the given agent.

Parameters:

agentName - the name of the agent.

c - the command.

See Also:

String, ReferenceUpdateCommand

popCommand

public springs.access.ReferenceUpdateCommand popCommand()

Gets the first command from the table and removes it.

Returns:

the first command, null if any.

See Also:

ReferenceUpdateCommand

removeCommand

public void removeCommand(java.lang.String agentName)

Removes a command that requests the update for an agent with the given name. It only removes the first occurrence, if several.

Parameters:

agentName - the name of the agent.

See Also:

String

size

public int size()

Gets the number of remote agent references.

Returns:

the number.

getArrivalRate

public double getArrivalRate()

Gets the arrival rate of remote tuples, per second.

Returns:

the arrival rate, in tuples per second.