--- /dev/null 2005-06-09 16:29:11.371620296 -0400 +++ gnu/classpath/jdwp/processor/ThreadGroupReferenceCommandSet.java 2005-07-26 19:02:26.000000000 -0400 @@ -0,0 +1,178 @@ +/* ThreadGroupReferenceCommandSet.java -- class to implement the + ThreadGroupReference Command Set + Copyright (C) 2005 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.classpath.jdwp.processor; + +import gnu.classpath.jdwp.Jdwp; +import gnu.classpath.jdwp.JdwpConstants; +import gnu.classpath.jdwp.exception.JdwpException; +import gnu.classpath.jdwp.exception.JdwpInternalErrorException; +import gnu.classpath.jdwp.exception.NotImplementedException; +import gnu.classpath.jdwp.id.IdManager; +import gnu.classpath.jdwp.id.ObjectId; +import gnu.classpath.jdwp.util.JdwpString; + +import java.io.DataOutputStream; +import java.io.IOException; +import java.nio.ByteBuffer; + +/** + * A class representing the ThreadGroupReference Command Set. + * + * @author Aaron Luchko + */ +public class ThreadGroupReferenceCommandSet implements CommandSet +{ + // Manages all the different ids that are assigned by jdwp + private final IdManager idMan = Jdwp.getIdManager(); + + public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command) + throws JdwpException + { + try + { + switch (command) + { + case JdwpConstants.CommandSet.ThreadGroupReference.NAME: + executeName(bb, os); + break; + case JdwpConstants.CommandSet.ThreadGroupReference.PARENT: + executeParent(bb, os); + break; + case JdwpConstants.CommandSet.ThreadGroupReference.CHILDREN: + executeChildren(bb, os); + break; + default: + throw new NotImplementedException("Command " + command + + " not found in ThreadGroupReference Command Set."); + } + } + catch (IOException ex) + { + // The DataOutputStream we're using isn't talking to a socket at all + // So if we throw an IOException we're in serious trouble + throw new JdwpInternalErrorException(ex); + } + return true; + } + + private void executeName(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ObjectId oid = idMan.readId(bb); + ThreadGroup group = (ThreadGroup) oid.getObject(); + JdwpString.writeString(os, group.getName()); + } + + private void executeParent(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ObjectId oid = idMan.readId(bb); + ThreadGroup group = (ThreadGroup) oid.getObject(); + ThreadGroup parent = group.getParent(); + ObjectId parentId = idMan.getId(parent); + parentId.write(os); + } + + private void executeChildren(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ObjectId oid = idMan.readId(bb); + ThreadGroup group = (ThreadGroup) oid.getObject(); + + ThreadGroup jdwpGroup = Thread.currentThread().getThreadGroup(); + int numThreads = group.activeCount(); + Thread allThreads[] = new Thread[numThreads]; + + group.enumerate(allThreads, false); + + // We need to loop through for the true count since some threads may have + // been destroyed since we got activeCount so those spots in the array will + // be null. As well we must ignore any threads that belong to jdwp + numThreads = 0; + for (int i = 0; i < allThreads.length; i++) + { + Thread thread = allThreads[i]; + if (thread == null) + break; // No threads after this point + if (!thread.getThreadGroup().equals(jdwpGroup)) + numThreads++; + } + + os.writeInt(numThreads); + + for (int i = 0; i < allThreads.length; i++) + { + Thread thread = allThreads[i]; + if (thread == null) + break; // No threads after this point + if (!thread.getThreadGroup().equals(jdwpGroup)) + idMan.getId(thread).write(os); + } + + int numGroups = group.activeCount(); + ThreadGroup allGroups[] = new ThreadGroup[numGroups]; + + group.enumerate(allGroups, false); + + // We need to loop through for the true count since some ThreadGroups may + // have been destroyed since we got activeCount so those spots in the array + // will be null. As well we must ignore any threads that belong to jdwp. + numGroups = 0; + for (int i = 0; i < allGroups.length; i++) + { + ThreadGroup tgroup = allGroups[i]; + if (tgroup == null) + break; // No ThreadGroups after this point + if (!tgroup.equals(jdwpGroup)) + numGroups++; + } + + os.writeInt(numGroups); + + for (int i = 0; i < allGroups.length; i++) + { + ThreadGroup tgroup = allGroups[i]; + if (tgroup == null) + break; // No ThreadGroups after this point + if (!tgroup.equals(jdwpGroup)) + idMan.getId(tgroup).write(os); + } + } +}