jcsp.plugNplay
Class ProcessWrite
java.lang.Object
|
+--jcsp.plugNplay.ProcessWrite
- All Implemented Interfaces:
- CSProcess
- public class ProcessWrite
- extends Object
- implements CSProcess
Writes one Object to its output channel.
Process Diagram
________________
| | out
| ProcessWrite |-->--
|________________|
Description
ProcessWrite is a process that performs a single write
to its out channel and then terminates. The Object
that is written must first be placed in the public value field
of this process (which is safe to set before and in between
process runs).
ProcessWrite declaration, construction and use should normally
be localised within a single method -- so we feel no embarassment about
its public field. Its only (envisaged) purpose is as described in
the example below.
Channel Protocols
Output Channels |
out |
java.lang.Object |
The out Channel can accept data of any Class.
|
Example
ProcessWrite is designed to simplify writing in parallel
to channels. Make as many instances as there
are channels, binding each instance to a different channel,
together with a Parallel
object in which to run them:
ChannelOutput out0, out1;
.
.
.
ProcessWrite write0 = new ProcessWrite (out0);
ProcessWrite write1 = new ProcessWrite (out1);
CSProcess parWrite01 = new Parallel (new CSProcess[] {out0, out1});
The above is best done once, before any looping over the
parallel write commences. A parallel write can now be performed
at any time (and any number of times) by executing:
write0.value = ...; // whatever we want sent down out0
write1.value = ...; // whatever we want sent down out1
parWrite01.run ();
The last line above terminates when, and only when, both writes have completed --
the events may occur in any order.
- Author:
- P.D.Austin
- See Also:
Parallel
,
ProcessRead
,
ProcessReadInt
,
ProcessWriteInt
Field Summary |
Object |
value
The Object to be written to the channel |
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 |
value
public Object value
- The Object to be written to the channel
ProcessWrite
public ProcessWrite(ChannelOutput out)
- Construct a new ProcessWrite.
- Parameters:
out
- the channel to which to write
run
public void run()
- The main body of this process.
- Specified by:
run
in interface CSProcess
Submit a bug or feature to jcsp-team@ukc.ac.uk
Version 1.0-rc4 of the JCSP API Specification (Copyright 1997-2000 P.D.Austin and P.H.Welch - All Rights Reserved)
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