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Class jcsp.lang.One2OneChannel 

java.lang.Object
   |
   +----jcsp.lang.AltingChannelInput
           |
           +----jcsp.lang.AltingChannel
                   |
                   +----jcsp.lang.One2OneChannel
public class One2OneChannel
extends AltingChannel

Description

The One2OneChannel is an implementation of an AltingChannel which is safe to use with only one Reading Process and one Writing Process. If either more than one reader or writer is using the Channel data may either be lost or read from the Channel more than once. In some cases it may cause the Channel to be left in an unstable state.

This implementation of the Channel uses Objects which conform to the ChannelDataStore interface to store the data sent across the Channel. This enables the storage policy to be defined when the channel is constructed. Also system constructors can define their own storage types.

This class also defines two static methods that can be used to create an array of One2OneChannel. The first of the two can be used to create an array with the default ChannelDataStore and the second allows the type of the ChannelDataStore to be specified.

Author:
P.D.Austin
See Also:
Alternative

Variable Index

o alt
The Alternative class which will control the selection
o data
The ChannelDataStore used to store the data for the Channel

Constructor Index

o One2OneChannel()
Constructs a new One2OneChannel with a ZeroBuffer ChannelDataStore.
o One2OneChannel(ChannelDataStore)
Constructs a new One2OneChannel with the specified ChannelDataStore.

Method Index

o create(int)
Creates an array of One2OneChannels.
o create(int, ChannelDataStore)
Creates an array of One2OneChannels using the specified ChannelDataStore.
o read()
Reads an Object from the Channel.
o write(Object)
Writes an Object to the Channel.

Variables

o data 
 protected ChannelDataStore data
The ChannelDataStore used to store the data for the Channel

o alt 
 protected Alternative alt
The Alternative class which will control the selection

Constructors

o One2OneChannel 
 public One2OneChannel()
Constructs a new One2OneChannel with a ZeroBuffer ChannelDataStore.

o One2OneChannel 
 public One2OneChannel(ChannelDataStore data)
Constructs a new One2OneChannel with the specified ChannelDataStore.

Parameters:
data - The ChannelDataStore used to store the data for the Channel

Methods

o read 
 public synchronized Object read()
Reads an Object from the Channel.

Returns:
The object returned from the Channel.
Overrides:
read in class AltingChannelInput
o write 
 public synchronized void write(Object value)
Writes an Object to the Channel.

Parameters:
value - The object to write to the Channel.
Overrides:
write in class AltingChannel
o create 
 public static One2OneChannel[] create(int n)
Creates an array of One2OneChannels.

Parameters:
n - The number of channels to create in the array
Returns:
The array of One2OneChannel
o create 
 public static One2OneChannel[] create(int n,
                                       ChannelDataStore store)
Creates an array of One2OneChannels using the specified ChannelDataStore.

Parameters:
n - The number of channels to create in the array
Returns:
The array of One2OneChannel 
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