main.java

OSGI 的 源码实现,采用JAVA书写

/*
 * Oscar - An implementation of the OSGi framework.
 * Copyright (c) 2004, Richard S. Hall
 * All rights reserved.
 *  
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of the ungoverned.org nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *  
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 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
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * Contact: Richard S. Hall ([e-mail])
 * Contributor(s):
 * 
**/
package org.ungoverned.oscar;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import org.ungoverned.oscar.util.DefaultBundleCache;

public class Main
{
    private static Oscar m_oscar = null;

    public static void main(String[] argv) throws Exception
    {
        // Initialize the system properties.
        Oscar.initializeSystemProperties();

        // See if the profile name property was specified.
        String profileName = System.getProperty(DefaultBundleCache.CACHE_PROFILE_PROP);

        // See if the profile directory property was specified.
        String profileDirName = System.getProperty(DefaultBundleCache.CACHE_PROFILE_DIR_PROP);

        // Print welcome banner.
        System.out.println("\nWelcome to Oscar.");
        System.out.println("=================\n");

        // If no profile or profile directory is specified in the
        // properties, then ask for a profile name.
        if ((profileName == null) && (profileDirName == null))
        {
            System.out.print("Enter profile name: ");
            BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
            try
            {
                profileName = in.readLine();
            }
            catch (IOException ex)
            {
                System.err.println("Could not read input.");
                System.exit(-1);
            }
            System.out.println("");
            if (profileName.length() != 0)
            {
                System.setProperty(DefaultBundleCache.CACHE_PROFILE_PROP, profileName);
            }
        }

        // A profile directory or name must be specified.
        if ((profileDirName == null) && (profileName.length() == 0))
        {
            System.err.println("You must specify a profile name or directory.");
            System.exit(-1);
        }

        try
        {
            // Now create an instance of Oscar.
            m_oscar = new Oscar();
        }
        catch (Exception ex)
        {
            System.err.println("Could not create Oscar: " + ex);
            ex.printStackTrace();
            System.exit(-1);
        }
    }
}