1 /*******************************************************************************

     2  * Copyright (c) 2009 Symbian Foundation and/or its subsidiary(-ies).

     3  * All rights reserved.

     4  * This component and the accompanying materials are made available

     5  * under the terms of the License "Eclipse Public License v1.0"

     6  * which accompanies this distribution, and is available

     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8  *

     9  * Initial Contributors:

    10  * Symbian Foundation - initial contribution.

    11  * Contributors:

    12  * Description:

    13  * Overview:

    14  * Details:

    15  * Platforms/Drives/Compatibility:

    16  * Assumptions/Requirement/Pre-requisites:

    17  * Failures and causes:

    18  *******************************************************************************/

    19 package org.symbian.tools.wrttools.debug.internal.launch;

    20 

    21 import java.io.IOException;

    22 import java.net.ServerSocket;

    23 

    24 import org.symbian.tools.wrttools.debug.internal.Activator;

    25 

    26 public abstract class PortPolicy {

    27     //	private static class ReuseSamePort extends PortPolicy {

    28     //		private int port = -1;

    29     //

    30     //		@Override

    31     //		protected int getPort() {

    32     //			if (port < 0) {

    33     //				port = getOpenPort();

    34     //			}

    35     //			return port;

    36     //		}

    37     //	}

    38 

    39 	private static class NewPortEachTime extends PortPolicy {

    40 		@Override

    41 		protected int getPort() {

    42 			return getOpenPort();

    43 		}

    44 	}

    45 

    46 	public static final PortPolicy INSTANCE;

    47 	static {

    48         //		if (CoreUtil.isMac()) {

    49 			INSTANCE = new NewPortEachTime();

    50         //		} else {

    51         //			INSTANCE = new ReuseSamePort();

    52         //		}

    53 	}

    54 

    55 	public static synchronized int getPortNumber() {

    56 		return INSTANCE.getPort();

    57 	}

    58 

    59 	public int getOpenPort() {

    60 		try {

    61 			final ServerSocket socket = new ServerSocket(0);

    62 			int port = socket.getLocalPort();

    63 			socket.close();

    64 			return port;

    65 		} catch (IOException e) {

    66 			Activator.log(e);

    67 			return 7222;

    68 		}

    69 	}

    70 

    71 	protected abstract int getPort();

    72 }