/*******************************************************************************
 * Copyright (c) 2000, 2006 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.jst.server.generic.core.internal;

import java.util.Map;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.model.IDebugTarget;
import org.eclipse.jdt.launching.AbstractJavaLaunchConfigurationDelegate;
import org.eclipse.jdt.launching.IJavaLaunchConfigurationConstants;
import org.eclipse.jdt.launching.IVMConnector;
import org.eclipse.jdt.launching.JavaRuntime;
import org.eclipse.osgi.util.NLS;

/**
 * <p>Extension of <code>AbstractJavaLaunchConfigurationDelegate</code> that supports 
 * the connection to remote JVMs for external servers. Used for debugging.</p>
 * 
 * <p>Based on JavaRemoteApplicationLaunchConfigurationDelegate</p>
 */
public class ExternalDebugLaunchConfigurationDelegate extends AbstractJavaLaunchConfigurationDelegate {

    /* (non-Javadoc)
     * @see org.eclipse.debug.core.model.ILaunchConfigurationDelegate#launch(org.eclipse.debug.core.ILaunchConfiguration, java.lang.String, org.eclipse.debug.core.ILaunch, org.eclipse.core.runtime.IProgressMonitor)
     */
    @SuppressWarnings({ "unchecked", "null" })
	public void launch(ILaunchConfiguration configuration, String mode, ILaunch launch, IProgressMonitor monitor) throws CoreException {

        if (monitor == null) {
            monitor = new NullProgressMonitor();
        }

        monitor.beginTask(NLS.bind(GenericServerCoreMessages.attachingToExternalGenericServer,new String[]{configuration.getName()}), 3);
        
        // check for cancellation
        if (monitor.isCanceled()) {
            return;
        }                       
                    
        monitor.subTask(GenericServerCoreMessages.verifyingExternalServerDebuggingLaunchAttributes);
                        
        String connectorId = getVMConnectorId(configuration);
        IVMConnector connector = null;
        if (connectorId == null) {
            connector = JavaRuntime.getDefaultVMConnector();
        } else {
            connector = JavaRuntime.getVMConnector(connectorId);
        }
        if (connector == null) {
            abort(GenericServerCoreMessages.externalServerDebugConnectorNotSpecified,
                    null, IJavaLaunchConfigurationConstants.ERR_CONNECTOR_NOT_AVAILABLE); 
        }
        
        Map argMap = configuration.getAttribute(IJavaLaunchConfigurationConstants.ATTR_CONNECT_MAP, (Map)null);
        
        int connectTimeout = JavaRuntime.getPreferences().getInt(JavaRuntime.PREF_CONNECT_TIMEOUT);
        argMap.put("timeout", ""+connectTimeout);  //$NON-NLS-1$//$NON-NLS-2$

        // check for cancellation
        if (monitor.isCanceled()) {
            return;
        }
        
        monitor.worked(1);
        
        monitor.subTask(GenericServerCoreMessages.creatingExternalServerDebuggingSourceLocator);
        // set the default source locator if required
        setDefaultSourceLocator(launch, configuration);
        monitor.worked(1);      
        
        // connect to remote VM
        connector.connect(argMap, monitor, launch);
        
        // check for cancellation
        if (monitor.isCanceled()) {
            IDebugTarget[] debugTargets = launch.getDebugTargets();
            for (int i = 0; i < debugTargets.length; i++) {
                IDebugTarget target = debugTargets[i];
                if (target.canDisconnect()) {
                    target.disconnect();
                }
            }
            return;
        }
        
        monitor.done();
    }
}