org.jcsp.plugNplay.ints
Class RegulateInt

java.lang.Object
  org.jcsp.plugNplay.ints.RegulateInt

All Implemented Interfaces:

CSProcess

public class RegulateInt
extends Object
implements CSProcess

This process controls the rate of flow of traffic from its input to output channels.

Process Diagram

     in    _______________________________
   --->---|                               | out
    reset | RegulateInt (initialInterval) |-->--
   --->---|_______________________________|
 

Description

RegulateInt produces a constant rate of output flow, regardless of the rate of its input. At the end of each time period, it outputs the last object input during that period. If nothing comes in, the previous output will be repeated (note: this is defined to be zero if nothing has ever arrived). If the input flow is greater than the required output flow, data will be discarded.

The interval (in msecs) defining the output flow rate is given by a constructor argument. This can be changed at any time by sending a new interval (as a Long) down its reset channel.

Channel Protocols

Input Channels
in	int	The input stream.
reset	java.lang.Long	This resets the time interval between outputs (milliseconds).
Output Channels
out	int	This carries samples from the input data, sampled at the defined rate.

Implementation

See here (for the implementation of Regulate – which is the same apart from regulating Object, rather than int, traffic).

Author:

P.H. Welch

See Also:

FixedDelayInt, RegularInt

Constructor Summary

RegulateInt(AltingChannelInputInt in, AltingChannelInput reset, ChannelOutputInt out, long initialInterval)
Construct the process.

Method Summary

void	run() The main body of this process.

Methods inherited from class java.lang.Object

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

Constructor Detail

RegulateInt

public RegulateInt(AltingChannelInputInt in,
                   AltingChannelInput reset,
                   ChannelOutputInt out,
                   long initialInterval)

Construct the process.

Parameters:

in - the input channel

out - the output channel

initialInterval - the initial interval between outputs (in milliseconds)

reset - send a Long down this to change the interval between outputs (in milliseconds)

Method Detail

run

public void run()

The main body of this process.

Specified by:

run in interface CSProcess