org/objectweb/proactive/core/body/rmi/RmiBodyAdapter.java

/* 
 * ################################################################
 * 
 * ProActive: The Java(TM) library for Parallel, Distributed, 
 *            Concurrent computing with Security and Mobility
 * 
 * Copyright (C) 1997-2007 INRIA/University of Nice-Sophia Antipolis
 * Contact: proactive@objectweb.org
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 *  
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 *  
 *  Initial developer(s):               The ProActive Team
 *                        http://www.inria.fr/oasis/ProActive/contacts.html
 *  Contributor(s): 
 * 
 * ################################################################
 */ 
package org.objectweb.proactive.core.body.rmi;

import java.net.MalformedURLException;
import java.rmi.ConnectException;

import org.objectweb.proactive.core.ProActiveException;
import org.objectweb.proactive.core.body.BodyAdapterImpl;
import org.objectweb.proactive.core.body.UniversalBody;
import org.objectweb.proactive.core.util.UrlBuilder;


public class RmiBodyAdapter extends BodyAdapterImpl {
    //
    // -- CONSTRUCTORS -----------------------------------------------
    //
    public RmiBodyAdapter() {
    }

    protected RmiBodyAdapter(RmiRemoteBody remoteBody)
        throws ProActiveException {
        construct(remoteBody);
    }

    public RmiBodyAdapter(UniversalBody body) throws ProActiveException {
        try {
            RmiRemoteBody remoteBody = new RmiRemoteBodyImpl(body);
            construct(remoteBody);
        } catch (java.rmi.RemoteException e) {
            throw new ProActiveException(e);
        }
    }

    public void register(String url) throws java.io.IOException {
        try {
            java.rmi.Naming.rebind(url, (RmiRemoteBody) proxiedRemoteBody);
        } catch (ConnectException e) {
            //failed to unbind at port 1099 
            // try at proactive.rmi.port
            String url2 = UrlBuilder.getProtocol(url) + "//" +
                UrlBuilder.getHostNameFromUrl(url) + ":" +
                System.getProperty("proactive.rmi.port") + "/" +
                UrlBuilder.getNameFromUrl(url);

            java.rmi.Naming.rebind(url2, (RmiRemoteBody) proxiedRemoteBody);
        }
    }

    public void unregister(String url) throws java.io.IOException {
        try {
            try {
                java.rmi.Naming.unbind(url);
            } catch (ConnectException e) {
                //failed to unbind at port 1099 
                // try at proactive.rmi.port
                String url2 = UrlBuilder.getProtocol(url) + "//" +
                    UrlBuilder.getHostNameFromUrl(url) + ":" +
                    System.getProperty("proactive.rmi.port") + "/" +
                    UrlBuilder.getNameFromUrl(url);

                java.rmi.Naming.unbind(url2);
            }
        } catch (java.rmi.NotBoundException e) {
            throw new java.io.IOException(
                "No object is bound to the given url : " + url);
        }
    }

    public UniversalBody lookup(String url) throws java.io.IOException {
        Object o = null;

        // Try if URL is the address of a RmiRemoteBody
        try {
            try {
                o = java.rmi.Naming.lookup(url);
            } catch (ConnectException e) {
                // connection failed, try to find a rmiregistry at proactive.rmi.port port
                String url2 = UrlBuilder.getProtocol(url) + "//" +
                    UrlBuilder.getHostNameFromUrl(url) + ":" +
                    System.getProperty("proactive.rmi.port") + "/" +
                    UrlBuilder.getNameFromUrl(url);

                o = java.rmi.Naming.lookup(url2);
            }
        } catch (java.rmi.NotBoundException e) { // there are one rmiregistry on target computer but node isn t bound
            throw new java.io.IOException("The url " + url +
                " is not bound to any known object");
        }

        //catch (java.rmi.ConnectException e)
        if (o instanceof RmiRemoteBody) {
            try {
                construct((RmiRemoteBody) o);
            } catch (ProActiveException e1) {
                throw new java.io.IOException(
                                "The remote object at " + url + " is not accessible ");
            }
            return this;
        } 
        
            throw new java.io.IOException(
                "The given url does exist but doesn't point to a remote body  url=" +
                url + " class found is " + o.getClass().getName());
    }


    public String [] list(String url) throws java.io.IOException {
        String [] names = null;

        // Try if URL is the address of a RmiRemoteBody
            try {
                names = java.rmi.Naming.list(url);
            } catch (MalformedURLException e) {
                // connection failed, try to find a rmiregistry at proactive.rmi.port port
                // ie change the port specified in url. 
                // Is this needed ? 
                String url2 = UrlBuilder.getProtocol(url) + "//" +
                    UrlBuilder.getHostNameFromUrl(url) + ":" +
                    System.getProperty("proactive.rmi.port") + "/" ;

                names = java.rmi.Naming.list(url2);
            } catch (ConnectException e) {
                return new String [] {};
            }
            return names;
    }
}

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