buffertest6.java

MPI for java for Distributed Programming

package mpjdev.buffertest;

import mpjdev.*;
import mpjbuf.*;

/**
 * This checks the sending/receiving of the java objects.
 */
public class BufferTest6 {
  public BufferTest6() {
  }
  
  public static void main(String args[]) throws Exception {  	  
  }
  
  public BufferTest6(String[] args) throws Exception{
    String[] nargs = new String[args.length+1];	  
    System.arraycopy(args,0,nargs,0,args.length);
    nargs[args.length] = this.toString();	  
    MPJDev.init(args);

    int id = MPJDev.WORLD.id();

    int size = MPJDev.WORLD.size();

    if(size > 2) {
      if(id == 1)
        System.out.println("BufferTest6: Must run with 2 tasks!");      
      MPJDev.finish();
      return;
    } 
    int SEND_OVERHEAD = MPJDev.getSendOverhead() ; 
    int RECV_OVERHEAD = MPJDev.getRecvOverhead() ; 

    java.util.Vector vector1 = null;
    java.util.Vector vector = new java.util.Vector();

    for (int i = 0; i < 10; i++) {
      vector.add(i + "");
    }

    if (MPJDev.WORLD.id() == 0) {
      Object[] source = new Object[5];
      source[0] = vector;
      source[1] = vector;
      source[2] = null;
      source[3] = null;
      source[4] = null;

      Buffer writeBuffer = new Buffer(
		      BufferFactory.create(8 + SEND_OVERHEAD), 
		      SEND_OVERHEAD, 8+ SEND_OVERHEAD );     
      
      writeBuffer.putSectionHeader(Type.OBJECT);
      writeBuffer.write(source, 0, 1);

      writeBuffer.commit();
      MPJDev.WORLD.send(writeBuffer, 1, 992, true);
      BufferFactory.destroy(writeBuffer.getStaticBuffer() );


    } else if (MPJDev.WORLD.id() == 1) {
      Buffer readBuffer = new Buffer(
		      BufferFactory.create(8 + RECV_OVERHEAD), 
		      RECV_OVERHEAD, 8+ RECV_OVERHEAD );     
      Object[] source = new Object[5];
      source[0] = null;
      source[1] = null;
      source[2] = null;
      source[3] = null;
      source[4] = null;


      MPJDev.WORLD.recv(readBuffer, 0, 992, true);  
      readBuffer.commit();
      readBuffer.getSectionHeader();
      readBuffer.getSectionSize (); try {
      readBuffer.read(source, 0, 1);    
      } catch (Exception e) {
        e.printStackTrace();
      }

      BufferFactory.destroy(readBuffer.getStaticBuffer() );
      
      vector1 = (java.util.Vector) source[0];

      if (vector1.equals(vector)) {
        System.out.println("BufferTest6 TEST Completed"+id);
      } else {
        System.out.println("BufferTest6 TEST (Unsuccessful) Completed");        
      }

    }

    MPJDev.finish();
  }
}