com.isencia.passerelle.hmi.action.ModelResumer.java Source code

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Here is the source code for com.isencia.passerelle.hmi.action.ModelResumer.java

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/*
 * (c) Copyright 2001-2006, iSencia Belgium NV
 * All Rights Reserved.
 *
 * This software is the proprietary information of iSencia Belgium NV.
 * Use is subject to license terms.
 */
package com.isencia.passerelle.hmi.action;

import java.awt.event.ActionEvent;

import javax.swing.ImageIcon;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import ptolemy.kernel.util.Attribute;

import com.isencia.passerelle.ext.ExecutionControlStrategy;
import com.isencia.passerelle.ext.impl.SuspendResumeExecutionControlStrategy;
import com.isencia.passerelle.hmi.HMIBase;
import com.isencia.passerelle.hmi.HMIMessages;
import com.isencia.passerelle.hmi.state.StateMachine;
import com.isencia.passerelle.hmi.util.DynamicStepExecutionControlStrategy;

@SuppressWarnings("serial")
public class ModelResumer extends AbstractAction {
    private final static Log logger = LogFactory.getLog(ModelDebugStepper.class);

    public ModelResumer(final HMIBase base) {
        super(base, HMIMessages.getString(HMIMessages.MENU_RESUME),
                new ImageIcon(HMIBase.class.getResource("resources/resume.gif")));
    }

    @Override
    protected Log getLogger() {
        return logger;
    }

    public synchronized void actionPerformed(final ActionEvent e) {
        if (getLogger().isTraceEnabled()) {
            getLogger().trace("Model Resume action - entry"); //$NON-NLS-1$
        }

        try {
            final ExecutionControlStrategy execCtrlStr = getHMI().getDirector().getExecutionControlStrategy();
            try {
                ((SuspendResumeExecutionControlStrategy) execCtrlStr).resume();
            } catch (final ClassCastException ex) {
                ((DynamicStepExecutionControlStrategy) execCtrlStr).resume();
                // there's a small time window here where there's a risk that a
                // suspend action
                // is triggered immediately after the resume, where it will
                // still see the Stepping exec ctrl strategy,
                // but that should never happen in reality...
                final Attribute tmp = getHMI().getDirector().getAttribute(HMIBase.EXECUTION_CONTROL_ATTR_NAME);
                if (tmp != null) {
                    // remove the previous execution controller
                    tmp.setContainer(null);
                }
                new SuspendResumeExecutionControlStrategy(getHMI().getDirector(),
                        HMIBase.EXECUTION_CONTROL_ATTR_NAME);
            }
        } catch (final Exception ex) {
            getLogger().error("Received resume event, but model not configured correctly", ex);
        }

        StateMachine.getInstance().transitionTo(StateMachine.MODEL_EXECUTING);

        if (getLogger().isTraceEnabled()) {
            getLogger().trace("Model Resume action - exit"); //$NON-NLS-1$
        }
    }
}