Package edu.jas.util

Class MPJChannel

java.lang.Object

edu.jas.util.MPJChannel

public final class MPJChannel
extends java.lang.Object

MPJChannel provides a communication channel for Java objects using MPI or TCP/IP to a given rank. Can use MPI transport layer for "niodev" with FastMPJ.

Author:

Heinz Kredel

Field Summary

Fields

Modifier and Type	Field	Description
static int	CHANTAG
(package private) static boolean	useTCP

Constructor Summary

Constructors

Constructor	Description
MPJChannel(mpi.Comm s, int r)	Constructs a MPI channel on the given MPI engine.
MPJChannel(mpi.Comm s, int r, int t)	Constructs a MPI channel on the given MPI engine.

Method Summary

Modifier and Type	Method	Description
void	close()	Closes the channel.
mpi.Comm	getEngine()	Get the MPI engine.
java.lang.Object	receive()	Receives an object.
java.lang.Object	receive(int t)	Receives an object.
void	send(int t, java.lang.Object v)	Sends an object.
(package private) void	send(int t, java.lang.Object v, int pr)	Sends an object.
void	send(java.lang.Object v)	Sends an object.
java.lang.String	toString()	to string.

Methods inherited from class java.lang.Object

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

Field Detail

CHANTAG

public static final int CHANTAG

See Also:

Constant Field Values

useTCP

static boolean useTCP

Constructor Detail

MPJChannel

public MPJChannel(mpi.Comm s,
                  int r)
           throws java.io.IOException,
                  mpi.MPIException

Constructs a MPI channel on the given MPI engine.

Parameters:

s - MPI communicator object.

r - rank of MPI partner.

Throws:

java.io.IOException

mpi.MPIException

MPJChannel

public MPJChannel(mpi.Comm s,
                  int r,
                  int t)
           throws java.io.IOException,
                  mpi.MPIException

Constructs a MPI channel on the given MPI engine.

Parameters:

s - MPI communicator object.

r - rank of MPI partner.

t - tag for messages.

Throws:

java.io.IOException

mpi.MPIException

Method Detail

getEngine

public mpi.Comm getEngine()

Get the MPI engine.

send

public void send(java.lang.Object v)
          throws java.io.IOException,
                 mpi.MPIException

Sends an object.

Parameters:

v - message object.

Throws:

java.io.IOException

mpi.MPIException

send

public void send(int t,
                 java.lang.Object v)
          throws java.io.IOException,
                 mpi.MPIException

Sends an object.

Parameters:

t - message tag.

v - message object.

Throws:

java.io.IOException

mpi.MPIException

send

void send(int t,
          java.lang.Object v,
          int pr)
   throws java.io.IOException,
          mpi.MPIException

Sends an object.

Parameters:

t - message tag.

v - message object.

pr - partner rank.

Throws:

java.io.IOException

mpi.MPIException

receive

public java.lang.Object receive()
                         throws java.io.IOException,
                                java.lang.ClassNotFoundException,
                                mpi.MPIException

Receives an object.

Returns:

a message object.

Throws:

java.io.IOException

java.lang.ClassNotFoundException

mpi.MPIException

receive

public java.lang.Object receive(int t)
                         throws java.io.IOException,
                                java.lang.ClassNotFoundException,
                                mpi.MPIException

Receives an object.

Parameters:

t - message tag.

Returns:

a message object.

Throws:

java.io.IOException

java.lang.ClassNotFoundException

mpi.MPIException

close

public void close()

Closes the channel.

toString

public java.lang.String toString()

to string.

Overrides:

toString in class java.lang.Object