Package jpvm

Source Code of jpvm.jpvmRecvConnection

/* jpvmRecvConnection.java
*
* The jpvmRecvConnection class implements objects that represent
* connections to remote jpvm processes from which messages may be
* received.
*
* Adam J Ferrari
* Sun 05-26-1996
*
* Copyright (C) 1996  Adam J Ferrari
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
* MA 02139, USA.
*/

package jpvm;

import java.net.*;
import java.io.*;
import jpvm.jpvmTaskId;

public
class jpvmRecvConnection {
  private InputStream  instrm;
  public DataInputStream  strm;
  public jpvmTaskId  tid;
 
  public jpvmRecvConnection() {
    instrm = null;
    strm = null;
    tid   = null;
  }

  public jpvmRecvConnection(Socket sock) {
    if(sock==null) return;
    try {
      instrm = sock.getInputStream();
      instrm = new BufferedInputStream(instrm);
      strm = new DataInputStream(instrm);
      tid = new jpvmTaskId();
      try {
        tid.recv(strm);
      }
      catch (jpvmException jpe) {
        strm  = null;
        tid   = null;
        jpvmDebug.error("jpvmRecvConnection, internal"+
          " error");
      }
      jpvmDebug.note("jpvmRecvConnection, connect to "
        +tid.toString()+" established");
    }
    catch (IOException ioe) {
      strm  = null;
      tid   = null;
      jpvmDebug.error("jpvmRecvConnection, i/o exception");
    }
    if(strm == null) return;
  }

  public boolean hasMessagesQueued() {
    boolean ret = false;
    if(instrm != null) {
      try {
        if (instrm.available() > 0)
        ret = true;
      }
      catch (IOException ioe) {
        ret = false;
        jpvmDebug.error("jpvmRecvConnection, " +
          "hasMessagesQueued - i/o exception");
      }
    }
    return ret;
  }
};
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