138 lines
4 KiB
Java
138 lines
4 KiB
Java
/* PacketProcessor.java -- a thread which processes command packets
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from the debugger
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Copyright (C) 2005 Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.classpath.jdwp.processor;
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import gnu.classpath.jdwp.Jdwp;
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import gnu.classpath.jdwp.event.Event;
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import gnu.classpath.jdwp.exception.JdwpException;
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import gnu.classpath.jdwp.transport.JdwpConnection;
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import gnu.classpath.jdwp.transport.JdwpCommandPacket;
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import gnu.classpath.jdwp.transport.JdwpPacket;
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import gnu.classpath.jdwp.transport.JdwpReplyPacket;
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import java.io.IOException;
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/**
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* This class is responsible for processing packets from the
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* debugger. It waits for an available packet from the connection
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* ({@link gnu.classpath.jdwp.transport.JdwpConnection}) and then
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* processes the packet and any reply.
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*
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* @author Keith Seitz (keiths@redhat.com)
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*/
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public class PacketProcessor
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extends Thread
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{
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// The connection to the debugger
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private JdwpConnection _connection;
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// Shutdown this thread?
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private boolean _shutdown;
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/**
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* Constructs a new <code>PacketProcessor</code> object
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* Connection must be validated before getting here!
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*
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* @param con the connection
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*/
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public PacketProcessor (JdwpConnection con)
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{
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_connection = con;
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_shutdown = false;
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}
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/**
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* Main run routine for this thread. Will loop getting packets
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* from the connection and processing them.
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*/
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public void run ()
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{
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while (!_shutdown)
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{
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_processOnePacket ();
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}
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}
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/**
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* Shutdown the packet processor
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*/
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public void shutdown ()
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{
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_shutdown = true;
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interrupt ();
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}
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// Helper function which actually does all the work of waiting
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// for a packet and getting it processed.
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private void _processOnePacket ()
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{
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JdwpPacket pkt = _connection.getPacket ();
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if (pkt instanceof JdwpReplyPacket)
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{
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// We're not supposed to get these from the debugger!
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// Drop it on the floor
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return;
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}
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if (pkt != null)
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{
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JdwpReplyPacket reply;
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try
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{
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// !! process packet here !!
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reply = new JdwpReplyPacket (pkt, (short) 0);
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}
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catch (JdwpException ex)
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{
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reply = new JdwpReplyPacket (pkt, ex.getErrorCode ());
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}
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try
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{
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_connection.sendPacket (reply);
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}
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catch (IOException ioe)
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{
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// Not much we can do...
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}
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}
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}
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}
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