Copyright (c) 2008, 2018 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2008, 2018 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.equinox.internal.app;

import org.eclipse.osgi.service.runnable.ApplicationRunnable;
import org.osgi.service.application.ApplicationException;

A main threaded application may be launched using this class to launch the main threaded application.
/**
 * A main threaded application may be launched using this class to launch the main threaded application.
 */
public class MainApplicationLauncher implements ApplicationRunnable {
	private final EclipseAppContainer appContainer;
	private ApplicationRunnable launchMainApp; // a handle to a main threaded application

	public MainApplicationLauncher(EclipseAppContainer appContainer) {
		this.appContainer = appContainer;
	}

	@Override
	public Object run(Object context) throws Exception {
		appContainer.startDefaultApp(false);
		ApplicationRunnable mainHandle = getMainHandle();
		if (mainHandle != null)
			return mainHandle.run(context);
		throw new ApplicationException(ApplicationException.APPLICATION_INTERNAL_ERROR, Messages.application_noIdFound);
	}

	private synchronized ApplicationRunnable getMainHandle() {
		return launchMainApp;
	}

	@Override
	public void stop() {
		// force the application to quit
		ApplicationRunnable handle = getMainHandle();
		if (handle != null)
			handle.stop();
	}

	synchronized void launch(ApplicationRunnable app) {
		launchMainApp = app;
	}
}