defaultconfigurator.java

jxta_src_2.41b jxta 2.41b 最新版源码 from www.jxta.org

/*
 *  Copyright (c) 2001-2003 Sun Microsystems, Inc.  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 *  2. 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.
 *
 *  3. The end-user documentation included with the redistribution,
 *  if any, must include the following acknowledgment:
 *  "This product includes software developed by the
 *  Sun Microsystems, Inc. for Project JXTA."
 *  Alternately, this acknowledgment may appear in the software itself,
 *  if and wherever such third-party acknowledgments normally appear.
 *
 *  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"
 *  must not be used to endorse or promote products derived from this
 *  software without prior written permission. For written
 *  permission, please contact Project JXTA at http://www.jxta.org.
 *
 *  5. Products derived from this software may not be called "JXTA",
 *  nor may "JXTA" appear in their name, without prior written
 *  permission of Sun.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 SUN MICROSYSTEMS OR
 *  ITS 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.
 *  ====================================================================
 *
 *  This software consists of voluntary contributions made by many
 *  individuals on behalf of Project JXTA.  For more
 *  information on Project JXTA, please see
 *  <http://www.jxta.org/>.
 *
 *  This license is based on the BSD license adopted by the Apache Foundation.
 *
 *  $Id: DefaultConfigurator.java,v 1.19 2006/02/22 01:29:42 bondolo Exp $
 */

package net.jxta.impl.peergroup;

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.net.URI;

import java.io.IOException;
import java.util.NoSuchElementException;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;

import net.jxta.document.Advertisement;
import net.jxta.document.AdvertisementFactory;
import net.jxta.document.XMLDocument;
import net.jxta.peergroup.PeerGroup;

import net.jxta.exception.JxtaError;
import net.jxta.exception.ConfiguratorException;

import net.jxta.impl.protocol.PlatformConfig;
import net.jxta.impl.protocol.PSEConfigAdv;

/**
 * This implementation provides the ability to reconfigure a JXTA PlatformConfig
 * via an AWT based dialog. This is the original JXTA configuration mechanism.
 */
public class DefaultConfigurator extends AutomaticConfigurator {
    
    /**
     *  Log4J logger
     **/
    private final static transient Logger LOG = Logger.getLogger(DefaultConfigurator.class.getName());
    
    /**
     * Configures the platform using the specified directory.
     **/
    public DefaultConfigurator(URI jxtaHome) throws ConfiguratorException {
        super(jxtaHome);
    }
    
    /**
     *  {@inheritDoc}
     *
     *  <p/>Kinda hackish in that we don't really do anything if home is not a file.
     **/
    public boolean isReconfigure() {
        if( !"file".equalsIgnoreCase( jxtaHome.getScheme() ) ){
            return false;
        }
                
        File jxtaHomeDir = new File( jxtaHome );
                
                try {
            boolean forceReconfig;
                    
            File file = new File( jxtaHomeDir, "reconf" );
            forceReconfig = file.exists();
                    
            if( LOG.isEnabledFor(Level.DEBUG) ) {
                LOG.debug( "force reconfig : " + forceReconfig );
            }
            
            return forceReconfig;
        } catch (Exception ex1) {
            if (LOG.isEnabledFor(Level.ERROR)) {
                LOG.error("Could not check 'reconf' file. Assuming it exists.", ex1 );
            }
            
            if( LOG.isEnabledFor(Level.INFO) ) {
                LOG.info( "Reconfig required - error getting 'reconf' file" );
        }
        
            return true;
        }
    }
    
    /**
     *  {@inheritDoc}
     **/
    public void setReconfigure(boolean reconfigure) {
        if( !"file".equalsIgnoreCase( jxtaHome.getScheme() ) ){
            return;
        }

        File jxtaHomeDir = new File( jxtaHome );
        
        File f = new File(jxtaHomeDir, "reconf");
        
        if (reconfigure) {
            try {
                f.createNewFile();
            } catch (IOException ex1) {
                if (LOG.isEnabledFor(Level.ERROR)) {
                    LOG.error("Could not create 'reconf' file", ex1 );
                    LOG.error("Create the file 'reconf' by hand before retrying.");
                }
            }
        } else {
            try {
                f.delete();
            } catch (Exception ex1) {
                if (LOG.isEnabledFor(Level.ERROR)) {
                    LOG.error("Could not remove 'reconf' file", ex1 );
                    LOG.error("Delete the file 'reconf' by hand before retrying.");
                }
            }
        }
    }
    
    /**
     *  {@inheritDoc}
     **/
    public PlatformConfig getPlatformConfig() throws ConfiguratorException {
        boolean needsConfig = isReconfigure();
            
        if( needsConfig && LOG.isEnabledFor(Level.INFO) ) {
            LOG.info( "Reconfig requested - Forced reconfigure" );
        }
            
        try {
            super.getPlatformConfig();
            
            // Automatic configuration doesn't do any security config. We use
            // this fact to decide if we must do configuration.
            XMLDocument security = (XMLDocument) advertisement.getServiceParam(PeerGroup.membershipClassID);

            if( null == security ) {
               needsConfig = true;
               
               if( LOG.isEnabledFor(Level.INFO) ) {
                   LOG.info( "Reconfig requested - No security info" );
               }
            } else {
                Advertisement adv = null;

                try {
                    adv = AdvertisementFactory.newAdvertisement(security);
                } catch (NoSuchElementException notAnAdv) {
                    ; // that's ok.
                } catch (IllegalArgumentException badAdv) {
                    ; // that's ok.
                }

                if (adv instanceof PSEConfigAdv) {
                    PSEConfigAdv pseConfig = (PSEConfigAdv) adv;

                    // no certificate? That means we need to make one.
                    needsConfig |= (null == pseConfig.getCertificate());
                } else {
                    needsConfig = true;
                }
            }
        } catch (IncompleteConfigurationException configBad) {
            needsConfig = true;
        }
            
        if( needsConfig ) {
            setReconfigure( true );
            
            try {
                if( java.awt.EventQueue.isDispatchThread() ) {
                    LOG.fatal(  "The JXTA AWT Configuration Dialog cannot be run from " +
                                "the event dispatch thread. It's modal nature is " +
                                "fundamentally incompatible with running on the " +
                                "event dispatch thread. Either change to a different " +
                                "Configurator via PeerGroupFactory.setConfiguratorClass() " +
                                "or start JXTA from the application main Thread before " +
                                "starting your GUI via invokeLater()." );
                    
                    // cruel but fair, the alternative is a UI deadlock.
                    System.exit( 1 );
                }
                
                ConfigDialog configUI = new ConfigDialog( advertisement );
                configUI.untilDone();
                
                setReconfigure( false );
            } catch (Throwable t) {
                if (t instanceof JxtaError) {
                    throw (JxtaError) t;
                    }
                    
                if( LOG.isEnabledFor(Level.WARN) ) {
                    LOG.warn( "Could not initialize graphical config dialog", t );
                }
            
                BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
            
                // clear any type-ahead
                try {
                    while (in.ready()) {
                        in.readLine();
            }
                } catch (Exception ignored ) {
                    ;
                }
                
                System.err.flush();
                System.out.flush();
                System.out.println("The window-based configurator does not seem to be usable.");
                System.out.print("Do you want to stop and edit the current configuration ? [no]: ");
                System.out.flush();
                String answer = "no";
                    try {
                    answer = in.readLine();
                } catch (Exception ignored) {
                    ;
            }
            
                // this will cover all the cases of the answer yes, while
                // allowing non-gui/batch type scripts to load the platform
                // see platform issue #45
            
                if ("yes".equalsIgnoreCase(answer)) {
                    save();
                
                    System.out.println("Exiting; edit the file \"" + configFile.getPath() +
                            "\", remove the file \"reconf\", and then launch JXTA again.");
                        
                    throw new JxtaError("Manual Configuration Requested");
                } else {
                    System.out.println("Attempting to continue using the current configuration.");
                }
            }
            
            // Set again in case it changed
            adjustLog4JPriority();
        }
        
        return advertisement;
    }
}