Class Multiplex

java.lang.Object
org.jcsp.plugNplay.Multiplex
All Implemented Interfaces:
CSProcess

public final class Multiplex extends Object implements CSProcess
Fair multiplexes its input Object stream array into one output stream (carrying source channel and data pairs).

Process Diagram

Description

Multiplex is a process to convert multiple streams of objects to a single stream in such a way that it can be de-multiplexed later. The protocol on the outgoing multiplexed stream consists of an Integer, that represents the channel identity of the multiplexed data, followed by the multiplexed data.

The ordering of the channels in the in array makes no difference to the functionality of this process -- the multiplexing services all channels fairly.

Channel Protocols

Input Channels
in[] java.lang.Object The input streams.
Output Channels
out java.lang.Integer, java.lang.Object The channel index followed by the multiplexed data.

Example

The following example shows how to use MultiplexInt in a small program.
 import org.jcsp.lang.*;
 import org.jcsp.plugNplay.*;
 
 public class MultiplexExample {
 
   public static void main (String[] argv) {
 
     final One2OneChannel[] a = Channel.one2oneArray (3);
     final One2OneChannel b = Channel.one2one ();
 
     new Parallel (
       new CSProcess[] {
         new Numbers (a[0].out ()),
         new Fibonacci (a[1].out ()),
         new Squares (a[2].out ()),
         new Multiplex (Channel.getInputArray (a), b.out ()),
         new CSProcess () {
           public void run () {
             String[] key = {"Numbers ",
                             "            Fibonacci ",
                             "                          Squares "};
             while (true) {
               int channel = ((Integer) b.in ().read ()).intValue ();
               System.out.print (key[channel]);     // print channel source
               int n = ((Integer) b.in ().read ()).intValue ();
               System.out.println (n);              // print multiplexed data
             }
           }
         }
       }
     ).run ();
 
   }
 
 }
 
Author:
P.H. Welch and P.D. Austin and P.H. Welch
See Also:
  • Constructor Details

    • Multiplex

      public Multiplex(AltingChannelInput[] in, ChannelOutput out)
      Construct a new Multiplex process with the input Channel in and the output Channels out. The ordering of the Channels in the in array make no difference to the functionality of this process -- the multiplexing services all channels fairly.
      Parameters:
      in - the input channels
      out - the output channel
  • Method Details

    • run

      public void run()
      The main body of this process.
      Specified by:
      run in interface CSProcess