/*
* 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");
}
}
}