com.astra.ses.spell.gui.model.commands.DisconnectServer.java Source code

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Here is the source code for com.astra.ses.spell.gui.model.commands.DisconnectServer.java

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///////////////////////////////////////////////////////////////////////////////
//
// PACKAGE   : com.astra.ses.spell.gui.model.commands
// 
// FILE      : DisconnectServer.java
//
// DATE      : 2008-11-21 08:55
//
// Copyright (C) 2008, 2010 SES ENGINEERING, Luxembourg S.A.R.L.
//
// By using this software in any way, you are agreeing to be bound by
// the terms of this license.
//
// 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
//
// NO WARRANTY
// EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE PROGRAM IS PROVIDED
// ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER
// EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR
// CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A
// PARTICULAR PURPOSE. Each Recipient is solely responsible for determining
// the appropriateness of using and distributing the Program and assumes all
// risks associated with its exercise of rights under this Agreement ,
// including but not limited to the risks and costs of program errors,
// compliance with applicable laws, damage to or loss of data, programs or
// equipment, and unavailability or interruption of operations.
//
// DISCLAIMER OF LIABILITY
// EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, NEITHER RECIPIENT NOR ANY
// CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT LIMITATION
// LOST PROFITS), HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE PROGRAM OR THE
// EXERCISE OF ANY RIGHTS GRANTED HEREUNDER, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGES.
//
// Contributors:
//    SES ENGINEERING - initial API and implementation and/or initial documentation
//
// PROJECT   : SPELL
//
// SUBPROJECT: SPELL GUI Client
//
///////////////////////////////////////////////////////////////////////////////
package com.astra.ses.spell.gui.model.commands;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

import com.astra.ses.spell.gui.core.exceptions.ServerError;
import com.astra.ses.spell.gui.core.services.ServerProxy;
import com.astra.ses.spell.gui.core.services.ServiceManager;

/**
 * Our sample handler extends AbstractHandler, an IHandler base class.
 * @see org.eclipse.core.commands.IHandler
 * @see org.eclipse.core.commands.AbstractHandler
 */
public class DisconnectServer extends AbstractHandler {
    public static final String ID = "com.astra.ses.spell.gui.commands.DisconnectServer";

    /***************************************************************************
     * The constructor.
     **************************************************************************/
    public DisconnectServer() {
    }

    /***************************************************************************
     * The command has been executed, so extract extract the needed information
     * from the application context.
     **************************************************************************/
    public CommandResult execute(ExecutionEvent event) throws ExecutionException {
        IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
        ServerProxy proxy = (ServerProxy) ServiceManager.get(ServerProxy.ID);
        if (!proxy.isConnected()) {
            MessageDialog.openWarning(window.getShell(), "Disconnect from server",
                    "Already disconnected from server");
            return CommandResult.NO_EFFECT;
        } else {
            try {
                proxy.disconnect();
            } catch (ServerError ex) {
                MessageDialog.openError(window.getShell(), "Disconnect from server",
                        "Cannot disconnect from server:\n\n" + ex.getLocalizedMessage());
                return CommandResult.FAILED;
            }
        }
        return CommandResult.SUCCESS;
    }
}