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/*******************************************************************************
* Copyright (c) 2014 Wind River Systems, Inc. and others. All rights reserved.
* This program and the accompanying materials are made available under the terms
* of the Eclipse Public License v1.0 which accompanies this distribution, and is
* available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.internal.debug.ui.model;
import org.eclipse.debug.core.IRequest;
import org.eclipse.tcf.debug.ui.ITCFPresentationProvider;
import org.eclipse.tcf.internal.debug.ui.Activator;
import org.eclipse.tcf.protocol.Protocol;
/**
* TCFRunnable is a wrapper for IRequest.
* It implements Runnable interface and is used by TCFModel to handle the request.
*/
public abstract class TCFRunnable implements Runnable {
private final IRequest request;
private final Iterable<ITCFPresentationProvider> listeners;
protected boolean done;
public TCFRunnable(TCFModel model, IRequest request) {
this.request = request;
listeners = model.view_request_listeners;
if (Protocol.isDispatchThread()) {
if (listeners != null) {
for (ITCFPresentationProvider l : listeners) {
try {
if (!l.updateStarted(TCFRunnable.this.request)) return;
}
catch (Throwable x) {
Activator.log("Unhandled exception in a presentation provider", x);
}
}
}
run();
return;
}
if (listeners == null) {
Protocol.invokeLater(this);
return;
}
Protocol.invokeLater(new Runnable() {
@Override
public void run() {
assert !done;
for (ITCFPresentationProvider l : listeners) {
try {
if (!l.updateStarted(TCFRunnable.this.request)) return;
}
catch (Throwable x) {
Activator.log("Unhandled exception in a presentation provider", x);
}
}
TCFRunnable.this.run();
}
});
}
public void done() {
assert !done;
done = true;
if (listeners != null) {
for (ITCFPresentationProvider l : listeners) {
try {
if (!l.updateComplete(request)) return;
}
catch (Throwable x) {
Activator.log("Unhandled exception in a presentation provider", x);
}
}
}
// Don't call Display.asyncExec: display thread can be blocked waiting for the request.
// For example, display thread is blocked for action state update requests.
// Calling back into Eclipse on TCF thread is dangerous too - if Eclipse blocks TCF thread
// we can get deadlocked. Might need a new thread (or Job) to make this call safe.
request.done();
}
}
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