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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2011, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This 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 (at your option) any later version.
 *
 * This software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.ejb.client.remoting;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashSet;

import org.jboss.logging.Logger;

/**
 * A {@link ClusterNode} holds the information of a server side cluster server instance
 *
 * @author Jaikiran Pai
 */
final class ClusterNode {

    private static final Logger logger = Logger.getLogger(ClusterNode.class);

    private static final Collection ALL_INET_ADDRESSES;

    static {
        Collection addresses;
        try {
            addresses = getAllApplicableInetAddresses();
        } catch (Throwable t) {
            logger.warn("Could not fetch the InetAddress(es) of this system due to " + t.getMessage());
            logger.debug("Failed while fetching InetAddress(es) of this system ", t);

            addresses = Collections.emptySet();
        }
        ALL_INET_ADDRESSES = addresses;
    }

    /**
     * The name of the cluster to which this cluster node belongs
     */
    private final String clusterName;

    /**
     * The node name of the cluster
     */
    private final String nodeName;

    private final ClientMapping[] clientMappings;
    private ResolvedDestination resolvedDestination;
    private final String cachedToString;

    ClusterNode(final String clusterName, final String nodeName, final ClientMapping[] clientMappings) {
        this.clusterName = clusterName;
        this.nodeName = nodeName;
        this.clientMappings = clientMappings;

        // resolve the destination from among the client mappings for this cluster node
        this.resolveDestination();

        this.cachedToString = this.generateToString();
    }

    /**
     * Returns the node name of this cluster node
     *
     * @return
     */
    String getNodeName() {
        return this.nodeName;
    }

    /**
     * Returns the destination address of the cluster node
     *
     * @return
     */
    String getDestinationAddress() {
        return this.resolvedDestination.destinationAddress;
    }

    /**
     * Returns the destination port of the cluster node
     *
     * @return
     */
    int getDestinationPort() {
        return this.resolvedDestination.destinationPort;
    }

    boolean isDestinationResolved() {
        return this.resolvedDestination != null;
    }

    @Override
    public String toString() {
        return this.cachedToString;
    }

    private String generateToString() {
        return "ClusterNode{" +
                "clusterName='" + clusterName + '\'' +
                ", nodeName='" + nodeName + '\'' +
                ", clientMappings=" + (clientMappings == null ? null : Arrays.asList(clientMappings)) +
                ", resolvedDestination=" + resolvedDestination +
                '}';
    }

    private void resolveDestination() {
        for (final ClientMapping clientMapping : this.clientMappings) {
            final InetAddress sourceNetworkAddress = clientMapping.getSourceNetworkAddress();
            final int netMask = clientMapping.getSourceNetworkMaskBits();
            for (final InetAddress address : ALL_INET_ADDRESSES) {
                logger.debugf("Checking for a match of client address %s with client mapping %s", address, clientMapping);
                final boolean match = NetworkUtil.belongsToNetwork(address, sourceNetworkAddress, netMask & 0xff);
                if (match) {
                    logger.debugf("Client mapping %s matches client address %s", clientMapping, address);
                    this.resolvedDestination = new ResolvedDestination(clientMapping.getDestinationAddress(), clientMapping.getDestinationPort());
                    return;
                }
            }
        }
    }

    private static final class ResolvedDestination {
        private final String destinationAddress;
        private final int destinationPort;

        ResolvedDestination(final String destinationAddress, final int destinationPort) {
            this.destinationAddress = NetworkUtil.formatPossibleIpv6Address(destinationAddress);
            this.destinationPort = destinationPort;
        }

        @Override
        public String toString() {
            return "[Destination address=" + this.destinationAddress + ", destination port="
                    + this.destinationPort + "]";
        }
    }

    /**
     * Returns all the {@link InetAddress}es that are applicable for the current system. This is done
     * by fetching all the {@link NetworkInterface network interfaces} and then getting the {@link InetAddress}es
     * for each of the network interface.
     *
     * @return
     * @throws SocketException
     */
    private static Collection getAllApplicableInetAddresses() throws SocketException {
        final Collection addresses = new HashSet();
        final Enumeration networkInterfaces = NetworkInterface.getNetworkInterfaces();
        while (networkInterfaces.hasMoreElements()) {
            final NetworkInterface networkInterface = networkInterfaces.nextElement();
            final Enumeration inetAddresses = networkInterface.getInetAddresses();
            while (inetAddresses.hasMoreElements()) {
                addresses.add(inetAddresses.nextElement());
            }
        }
        return addresses;
    }

}