public final void postponeCommand(final SuspendContextCommandImpl command) {
if (!isResumed()) {
// Important! when postponing increment the holds counter, so that the action is not released
// too early.
// This will ensure that the counter becomes zero only when the command is actually executed
// or canceled
command.hold();
myPostponedCommands.add(command);
} else {
command.notifyCancelled();
}
}
@Override
public final void action() throws Exception {
if (LOG.isDebugEnabled()) {
LOG.debug("trying " + this);
}
final SuspendContextImpl suspendContext = getSuspendContext();
if (suspendContext == null) {
if (LOG.isDebugEnabled()) {
LOG.debug("skip processing - context is null " + this);
}
notifyCancelled();
return;
}
if (suspendContext.myInProgress) {
suspendContext.postponeCommand(this);
} else {
try {
if (!suspendContext.isResumed()) {
suspendContext.myInProgress = true;
contextAction(suspendContext);
} else {
notifyCancelled();
}
} finally {
suspendContext.myInProgress = false;
if (suspendContext.isResumed()) {
for (SuspendContextCommandImpl postponed = suspendContext.pollPostponedCommand();
postponed != null;
postponed = suspendContext.pollPostponedCommand()) {
postponed.notifyCancelled();
}
} else {
SuspendContextCommandImpl postponed = suspendContext.pollPostponedCommand();
if (postponed != null) {
final Stack<SuspendContextCommandImpl> stack = new Stack<>();
while (postponed != null) {
stack.push(postponed);
postponed = suspendContext.pollPostponedCommand();
}
final DebuggerManagerThreadImpl managerThread =
suspendContext.getDebugProcess().getManagerThread();
while (!stack.isEmpty()) {
managerThread.pushBack(stack.pop());
}
}
}
}
}
}
protected void resume() {
assertNotResumed();
DebuggerManagerThreadImpl.assertIsManagerThread();
try {
if (!Patches.IBM_JDK_DISABLE_COLLECTION_BUG) {
for (ObjectReference objectReference : myKeptReferences) {
DebuggerUtilsEx.enableCollection(objectReference);
}
myKeptReferences.clear();
}
for (SuspendContextCommandImpl cmd = pollPostponedCommand();
cmd != null;
cmd = pollPostponedCommand()) {
cmd.notifyCancelled();
}
resumeImpl();
} finally {
myIsResumed = true;
}
}
public boolean processLocatableEvent(
final SuspendContextCommandImpl action, final LocatableEvent event)
throws EventProcessingException {
final SuspendContextImpl context = action.getSuspendContext();
if (!isValid()) {
context.getDebugProcess().getRequestsManager().deleteRequest(this);
return false;
}
final String[] title = {DebuggerBundle.message("title.error.evaluating.breakpoint.condition")};
try {
final StackFrameProxyImpl frameProxy = context.getThread().frame(0);
if (frameProxy == null) {
// might be if the thread has been collected
return false;
}
final EvaluationContextImpl evaluationContext =
new EvaluationContextImpl(
action.getSuspendContext(), frameProxy, getThisObject(context, event));
if (!evaluateCondition(evaluationContext, event)) {
return false;
}
title[0] = DebuggerBundle.message("title.error.evaluating.breakpoint.action");
runAction(evaluationContext, event);
} catch (final EvaluateException ex) {
if (ApplicationManager.getApplication().isUnitTestMode()) {
System.out.println(ex.getMessage());
return false;
}
throw new EventProcessingException(title[0], ex.getMessage(), ex);
}
return true;
}
protected static boolean scheduleCommand(
EvaluationContextImpl evaluationContext,
@NotNull final XCompositeNode node,
final SuspendContextCommandImpl command) {
evaluationContext
.getManagerThread()
.schedule(
new SuspendContextCommandImpl(command.getSuspendContext()) {
@Override
public void contextAction() throws Exception {
command.contextAction();
}
@Override
protected void commandCancelled() {
node.setErrorMessage(DebuggerBundle.message("error.context.has.changed"));
}
});
return true;
}
