/*
* Copyright (c) 1999, 2008, 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.
*/
/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
package com.sun.tools.example.debug.bdi;
import com.sun.jdi.*;
import com.sun.jdi.event.*;
import com.sun.tools.example.debug.event.*;
import javax.swing.SwingUtilities;
/**
*/
class JDIEventSource extends Thread {
private /*final*/ EventQueue queue;
private /*final*/ Session session;
private /*final*/ ExecutionManager runtime;
private final JDIListener firstListener = new FirstListener();
private boolean wantInterrupt; //### Hack
/**
* Create event source.
*/
JDIEventSource(Session session) {
super("JDI Event Set Dispatcher");
this.session = session;
this.runtime = session.runtime;
this.queue = session.vm.eventQueue();
}
@Override
public void run() {
try {
runLoop();
} catch (Exception exc) {
//### Do something different for InterruptedException???
// just exit
}
session.running = false;
}
private void runLoop() throws InterruptedException {
AbstractEventSet es;
do {
EventSet jdiEventSet = queue.remove();
es = AbstractEventSet.toSpecificEventSet(jdiEventSet);
session.interrupted = es.suspendedAll();
dispatchEventSet(es);
} while(!(es instanceof VMDisconnectEventSet));
}
//### Gross foul hackery!
private void dispatchEventSet(final AbstractEventSet es) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
boolean interrupted = es.suspendedAll();
es.notify(firstListener);
boolean wantInterrupt = JDIEventSource.this.wantInterrupt;
for (JDIListener jl : session.runtime.jdiListeners) {
es.notify(jl);
}
if (interrupted && !wantInterrupt) {
session.interrupted = false;
//### Catch here is a hack
try {
session.vm.resume();
} catch (VMDisconnectedException ee) {}
}
if (es instanceof ThreadDeathEventSet) {
ThreadReference t = ((ThreadDeathEventSet)es).getThread();
session.runtime.removeThreadInfo(t);
}
}
});
}
private void finalizeEventSet(AbstractEventSet es) {
if (session.interrupted && !wantInterrupt) {
session.interrupted = false;
//### Catch here is a hack
try {
session.vm.resume();
} catch (VMDisconnectedException ee) {}
}
if (es instanceof ThreadDeathEventSet) {
ThreadReference t = ((ThreadDeathEventSet)es).getThread();
session.runtime.removeThreadInfo(t);
}
}
//### This is a Hack, deal with it
private class FirstListener implements JDIListener {
@Override
public void accessWatchpoint(AccessWatchpointEventSet e) {
session.runtime.validateThreadInfo();
wantInterrupt = true;
}
@Override
public void classPrepare(ClassPrepareEventSet e) {
wantInterrupt = false;
runtime.resolve(e.getReferenceType());
}
@Override
public void classUnload(ClassUnloadEventSet e) {
wantInterrupt = false;
}
@Override
public void exception(ExceptionEventSet e) {
wantInterrupt = true;
}
@Override
public void locationTrigger(LocationTriggerEventSet e) {
session.runtime.validateThreadInfo();
wantInterrupt = true;
}
@Override
public void modificationWatchpoint(ModificationWatchpointEventSet e) {
session.runtime.validateThreadInfo();
wantInterrupt = true;
}
@Override
public void threadDeath(ThreadDeathEventSet e) {
wantInterrupt = false;
}
@Override
public void threadStart(ThreadStartEventSet e) {
wantInterrupt = false;
}
@Override
public void vmDeath(VMDeathEventSet e) {
//### Should have some way to notify user
//### that VM died before the session ended.
wantInterrupt = false;
}
@Override
public void vmDisconnect(VMDisconnectEventSet e) {
//### Notify user?
wantInterrupt = false;
session.runtime.endSession();
}
@Override
public void vmStart(VMStartEventSet e) {
//### Do we need to do anything with it?
wantInterrupt = false;
}
}
}