org/objectweb/proactive/core/node/NodeFactory.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.node;

import java.net.UnknownHostException;
import java.rmi.AlreadyBoundException;

import org.apache.log4j.Logger;
import org.objectweb.proactive.ProActive;
import org.objectweb.proactive.core.ProActiveException;
import org.objectweb.proactive.core.UniqueID;
import org.objectweb.proactive.core.config.ProActiveConfiguration;
import org.objectweb.proactive.core.runtime.ProActiveRuntime;
import org.objectweb.proactive.core.runtime.ProActiveRuntimeImpl;
import org.objectweb.proactive.core.runtime.RuntimeFactory;
import org.objectweb.proactive.core.util.UrlBuilder;
import org.objectweb.proactive.core.util.log.Loggers;
import org.objectweb.proactive.core.util.log.ProActiveLogger;
import org.objectweb.proactive.ext.security.ProActiveSecurityManager;


public class NodeFactory {
    protected static Logger logger = ProActiveLogger.getLogger(Loggers.DEPLOYMENT);
    private static final String DEFAULT_NODE_NAME;
    private static Node defaultNode = null;

    static {
        ProActiveConfiguration.load();

        String protocol = UrlBuilder.checkProtocol(System.getProperty(
                    "proactive.communication.protocol"));
        String port = System.getProperty("proactive.rmi.port");

        if (port != null) {
            DEFAULT_NODE_NAME = UrlBuilder.buildUrl("localhost", "Node",
                    protocol, new Integer(port).intValue());
        } else {
            DEFAULT_NODE_NAME = UrlBuilder.buildUrl("localhost", "Node",
                    protocol);
        }
    }

    // test with class loader
    //private static final ClassLoader myClassLoader = new NodeClassLoader();
    //
    // -- PUBLIC METHODS - STATIC -----------------------------------------------
    //
    public static synchronized Node getDefaultNode() throws NodeException {
        String nodeURL = null;

        ProActiveRuntime defaultRuntime = null;
        String jobID = ProActive.getJobId();
        ProActiveSecurityManager securityManager = null;

        if (defaultNode == null) {
            try {
                defaultRuntime = RuntimeFactory.getDefaultRuntime();
                nodeURL = defaultRuntime.createLocalNode(DEFAULT_NODE_NAME +
                        Integer.toString(ProActiveRuntimeImpl.getNextInt()),
                        false, securityManager, "DefaultVN", jobID);
            } catch (ProActiveException e) {
                throw new NodeException("Cannot create the default Node", e);
            } catch (AlreadyBoundException e) { //if this exception is risen, we generate an othe random name for the node
                getDefaultNode();
            }

            defaultNode = new NodeImpl(defaultRuntime, nodeURL,
                    UrlBuilder.checkProtocol(System.getProperty(
                            "proactive.communication.protocol")), jobID );
        }

        return defaultNode;
    }

    public static boolean isNodeLocal(Node node) {
        return node.getNodeInformation().getVMID()
                   .equals(UniqueID.getCurrentVMID());
    }

    public static Node createNode(String nodeURL)
        throws NodeException, AlreadyBoundException {
        return createNode(nodeURL, false, null, null);
    }

    public static Node createNode(String url, boolean replacePreviousBinding,
        ProActiveSecurityManager psm, String vnname)
        throws NodeException, AlreadyBoundException {
        ProActiveRuntime proActiveRuntime;
        String nodeURL;
        String jobID = ProActive.getJobId();

        if (logger.isDebugEnabled()) {
            logger.debug("NodeFactory: createNode(" + url + ")");
        }

        //first look for the prototcol
        String protocol = UrlBuilder.getProtocol(url);

        //NodeFactory factory = getFactory(protocol);
        //then create a node
        try {
            proActiveRuntime = RuntimeFactory.getProtocolSpecificRuntime(protocol);
            nodeURL = proActiveRuntime.createLocalNode(url,
                    replacePreviousBinding, psm, vnname, jobID);
        } catch (ProActiveException e) {
            throw new NodeException("Cannot create a Node based on " + url, e);
        }

        Node node = new NodeImpl(proActiveRuntime, nodeURL, protocol, jobID);

        return node;
    }

    public static Node getNode(String nodeURL) throws NodeException {
        ProActiveRuntime proActiveRuntime;
        String url;
        String jobID;

        if (logger.isDebugEnabled()) {
            logger.debug("NodeFactory: getNode() for " + nodeURL);
        }

        //do we have any association for this node?
        String protocol = UrlBuilder.getProtocol(nodeURL);

        //String noProtocolUrl = UrlBuilder.removeProtocol(nodeURL, protocol);
        try {
            url = UrlBuilder.checkUrl(nodeURL);
            proActiveRuntime = RuntimeFactory.getRuntime(url, protocol);
            jobID = proActiveRuntime.getJobID(url);
        } catch (ProActiveException e) {
            throw new NodeException("Cannot get the node based on " + nodeURL, e);
        } catch (UnknownHostException e) {
            throw new NodeException("Cannot get the node based on " + nodeURL, e);
        }

        Node node = new NodeImpl(proActiveRuntime, url, protocol, jobID);

        return node;
    }

    public static void killNode(String nodeURL) throws NodeException {
        ProActiveRuntime proActiveRuntime;
        String url;

        String protocol = UrlBuilder.getProtocol(nodeURL);

        try {
            url = UrlBuilder.checkUrl(nodeURL);
            proActiveRuntime = RuntimeFactory.getRuntime(url, protocol);
            proActiveRuntime.killNode(url);
        } catch (ProActiveException e) {
            throw new NodeException("Cannot get the node based on " + nodeURL, e);
        } catch (UnknownHostException e) {
            throw new NodeException("Cannot get the node based on " + nodeURL, e);
        }
    }
}

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