org.jboss.ejb.client.remoting.ClusterTopologyMessageHandler Maven / Gradle / Ivy

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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 org.jboss.ejb.client.ClusterContext;
import org.jboss.ejb.client.ClusterNodeManager;
import org.jboss.ejb.client.EJBClientConfiguration;
import org.jboss.ejb.client.EJBClientContext;
import org.jboss.ejb.client.EJBReceiverContext;
import org.jboss.logging.Logger;
import org.jboss.remoting3.Endpoint;

import java.io.DataInput;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

/**
 * Responsible for parsing the EJB remoting protocol messages which contain the information about the nodes that
 * are part of the cluster. The nodes will be considered as new
 * nodes and will just be added to the cluster context (without removing any existing nodes from the context).
 *
 * @author Jaikiran Pai
 */
class ClusterTopologyMessageHandler extends ProtocolMessageHandler {

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

    private final ChannelAssociation channelAssociation;

    ClusterTopologyMessageHandler(final ChannelAssociation channelAssociation) {
        this.channelAssociation = channelAssociation;
    }

    @Override
    protected void processMessage(final InputStream inputStream) throws IOException {
        if (inputStream == null) {
            throw new IllegalArgumentException("Cannot read from null stream");
        }
        final Map> clusterNodes = new HashMap>();
        try {
            final DataInput input = new DataInputStream(inputStream);
            // read the cluster count
            final int clusterCount = PackedInteger.readPackedInteger(input);
            for (int i = 0; i < clusterCount; i++) {
                // read the cluster name
                final String clusterName = input.readUTF();
                // read the cluster member count
                final int clusterMemberCount = PackedInteger.readPackedInteger(input);
                final Collection nodes = new ArrayList();
                // read the individual cluster member information
                for (int j = 0; j < clusterMemberCount; j++) {
                    // read the cluster member's node name
                    final String nodeName = input.readUTF();
                    // read the client-mapping count
                    final int clientMappingCount = PackedInteger.readPackedInteger(input);
                    final ClientMapping[] clientMappings = new ClientMapping[clientMappingCount];
                    // read each of the client-mapping(s)
                    for (int c = 0; c < clientMappingCount; c++) {
                        // read the client netmask which also contains the ipv4/ipv6 differentiator
                        final int netMaskWithIPFamilyDifferentiator = PackedInteger.readPackedInteger(input);

                        final int ipFamilyDifferentiator = netMaskWithIPFamilyDifferentiator & 1;
                        final int clientNetMask = netMaskWithIPFamilyDifferentiator >> 1;
                        final byte[] clientNetworkAddressBytes;
                        if (ipFamilyDifferentiator == 0) {
                            // ipv6
                            clientNetworkAddressBytes = new byte[16];
                        } else {
                            // ipv4
                            clientNetworkAddressBytes = new byte[4];
                        }
                        // read the client network address
                        input.readFully(clientNetworkAddressBytes);
                        final InetAddress clientNetworkAddress = InetAddress.getByAddress(clientNetworkAddressBytes);
                        // read the destination address
                        final String destinationAddress = input.readUTF();
                        // read the destination port
                        final int destinationPort = input.readUnsignedShort();
                        // create a ClientMapping out of this
                        clientMappings[c] = new ClientMapping(clientNetworkAddress, clientNetMask & 0xff, destinationAddress, destinationPort);
                    }
                    // form a cluster node out of the available information
                    final ClusterNode clusterNode = new ClusterNode(clusterName, nodeName, clientMappings);
                    nodes.add(clusterNode);
                }
                // add ito the map of cluster topologies
                clusterNodes.put(clusterName, nodes);
            }
        } finally {
            inputStream.close();
        }
        // let the client context know about the cluster topologies
        final EJBReceiverContext ejbReceiverContext = this.channelAssociation.getEjbReceiverContext();
        final EJBClientContext clientContext = ejbReceiverContext.getClientContext();
        for (final Map.Entry> entry : clusterNodes.entrySet()) {
            final String clusterName = entry.getKey();
            final Collection nodes = entry.getValue();
            if (logger.isDebugEnabled()) {
                logger.debug("Received a cluster node(s) addition message, for cluster named " + clusterName + " with "
                        + nodes.size() + " nodes " + Arrays.toString(nodes.toArray()));
            }
            // create a cluster context and add the nodes to it
            final ClusterContext clusterContext = clientContext.getOrCreateClusterContext(clusterName);
            // if this is a complete topology message, then we'll first remove any existing nodes from the cluster context
//            if (this.completeTopology) {
//                clusterContext.removeAllClusterNodes();
//            }
            this.addNodesToClusterContext(clusterContext, nodes);
        }
    }

    private void addNodesToClusterContext(final ClusterContext clusterContext, final Collection clusterNodes) {
        final Endpoint endpoint = this.channelAssociation.getChannel().getConnection().getEndpoint();
        final EJBClientConfiguration ejbClientConfiguration = clusterContext.getEJBClientContext().getEJBClientConfiguration();
        final ClusterNodeManager[] clusterNodeManagers = new ClusterNodeManager[clusterNodes.size()];
        int i = 0;
        for (final ClusterNode clusterNode : clusterNodes) {
            clusterNodeManagers[i++] = new RemotingConnectionClusterNodeManager(clusterContext, clusterNode, endpoint, ejbClientConfiguration, channelAssociation.getRemotingProtocol());
        }
        // add the cluster nodes to the cluster context
        clusterContext.addClusterNodes(clusterNodeManagers);
    }
}