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	/*
	* Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code 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
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package com.sun.tools.jdi;

	import com.sun.jdi.*;
	import com.sun.jdi.event.*;
	import java.util.*;

	public class InternalEventHandler implements Runnable
	{
	EventQueueImpl queue;
	VirtualMachineImpl vm;

	InternalEventHandler(VirtualMachineImpl vm, EventQueueImpl queue)
	{
	this.vm = vm;
	this.queue = queue;
	Thread thread = new Thread(vm.threadGroupForJDI(), this,
	"JDI Internal Event Handler");
	thread.setDaemon(true);
	thread.start();
	}

	public void run() {
	if ((vm.traceFlags & VirtualMachine.TRACE_EVENTS) != 0) {
	vm.printTrace("Internal event handler running");
	}
	try {
	while (true) {
	try {
	EventSet eventSet = queue.removeInternal();
	EventIterator it = eventSet.eventIterator();
	while (it.hasNext()) {
	Event event = it.nextEvent();
	if (event instanceof ClassUnloadEvent) {
	ClassUnloadEvent cuEvent = (ClassUnloadEvent)event;
	vm.removeReferenceType(cuEvent.classSignature());

	if ((vm.traceFlags & VirtualMachine.TRACE_EVENTS) != 0) {
	vm.printTrace("Handled Unload Event for " +
	cuEvent.classSignature());
	}
	} else if (event instanceof ClassPrepareEvent) {
	ClassPrepareEvent cpEvent = (ClassPrepareEvent)event;
	((ReferenceTypeImpl)cpEvent.referenceType())
	.markPrepared();

	if ((vm.traceFlags & VirtualMachine.TRACE_EVENTS) != 0) {
	vm.printTrace("Handled Prepare Event for " +
	cpEvent.referenceType().name());
	}
	}

	}

	/*
	* Handle exceptions that can occur in normal operation
	* but which can't be accounted for by event builder
	* methods. The thread should not be terminated if they
	* occur.
	*
	* TO DO: We need a better way to log these conditions.
	*/
	} catch (VMOutOfMemoryException vmme) {
	vmme.printStackTrace();
	} catch (InconsistentDebugInfoException idie) {
	idie.printStackTrace();

	/*
	* If any of these exceptions below occurs, there is some
	* sort of programming error that should be addressed in
	* the JDI implemementation. However, it would cripple
	* the implementation if we let this thread die due to
	* one of them. So, a notification of the exception is
	* given and we attempt to continue.
	*/
	} catch (ObjectCollectedException oce) {
	oce.printStackTrace();
	} catch (ClassNotPreparedException cnpe) {
	cnpe.printStackTrace();
	}
	}
	} catch (InterruptedException e) { // should we really die here
	} catch (VMDisconnectedException e) { // time to die
	}
	if ((vm.traceFlags & VirtualMachine.TRACE_EVENTS) != 0) {
	vm.printTrace("Internal event handler exiting");
	}
	}
	}

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