plugins/org.eclipse.papyrus.moka.kernel/src/org/eclipse/papyrus/moka/kernel/process/ExecutionEngineJob.java

/*****************************************************************************
 * Copyright (c) 2019, 2020 CEA LIST.
 *
 *
 * All rights reserved. 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:
 *  CEA LIST - Initial API and implementation
 *
 *****************************************************************************/
package org.eclipse.papyrus.moka.kernel.process;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.SubMonitor;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.debug.core.DebugException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.papyrus.moka.kernel.engine.EngineConfiguration;
import org.eclipse.papyrus.moka.kernel.engine.ExecutionEngineException;
import org.eclipse.papyrus.moka.kernel.engine.IExecutionEngine;
import org.eclipse.swt.widgets.Display;

public class ExecutionEngineJob extends Job implements IExecutionEngineContainer {

	/**
	 * The execution engine used to realize the model execution
	 */
	protected IExecutionEngine engine;

	/**
	 * The configuration passed to the engine
	 */
	protected EngineConfiguration<?> configuration;

	/**
	 * job name
	 */
	private final static String EXECUTION_ENGINE_JOB_NAME = "Execution Engine Job"; //$NON-NLS-1$

	public ExecutionEngineJob(IExecutionEngine e, EngineConfiguration<?> c) {
		super(EXECUTION_ENGINE_JOB_NAME);
		engine = e;
		configuration = c;
	}

	@Override
	protected IStatus run(IProgressMonitor monitor) {
		// Run the engine over the provided configuration
		// Note that the model execution takes place on a
		// dedicated thread of execution
		if (engine != null && configuration != null) {
			monitor.beginTask("Run execution engine", IProgressMonitor.UNKNOWN); //$NON-NLS-1$
			try {
				engine.run(configuration, SubMonitor.convert(monitor));
			} catch (ExecutionEngineException e) {
				handleEngineException(e);
			}
			monitor.done();
		}
		return Status.OK_STATUS;
	}

	@Override
	protected void canceling() {
		if (engine.canTerminate()) {
			try {
				engine.terminate();
			} catch (DebugException e) {
				e.printStackTrace();
			}
		}
	}

	public IExecutionEngine getExecutionEngine() {
		return engine;
	}

	private static void handleEngineException(final ExecutionEngineException exception) {
		Display.getDefault().syncExec(new Runnable() {
			@Override
			public void run() {
				String message = exception.getMessage();
				message += "\n\n Engine information ---"; //$NON-NLS-1$
				message += "\n - Status: " + exception.getEngineStatus().toString(); //$NON-NLS-1$
				message += "\n - ID: " + exception.getEngineID(); //$NON-NLS-1$
				MessageDialog.openWarning(Display.getDefault().getActiveShell(), "Error", message); //$NON-NLS-1$
			}
		});
	}

}