peergroup.java

jxme的一些相关程序,主要是手机上程序开发以及手机和计算机通信的一些程序资料,程序编译需要Ant支持

/*
 * Copyright (c) 2001 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: PeerGroup.java,v 1.2 2002/03/04 20:19:20 echtcherbina Exp $
 */

package net.jxta.peergroup;


import net.jxta.discovery.DiscoveryService;
import net.jxta.document.Advertisement;
import net.jxta.document.Element;
import net.jxta.endpoint.EndpointService;
import net.jxta.exception.ServiceNotFoundException;
import net.jxta.exception.PeerGroupException;
import net.jxta.exception.ProtocolNotSupportedException;
import net.jxta.exception.JxtaError;
import net.jxta.id.ID;
import net.jxta.id.IDFactory;
import net.jxta.membership.MembershipService;
import net.jxta.peer.PeerID;
import net.jxta.peer.PeerInfoService;
import net.jxta.peergroup.PeerGroupID;
import net.jxta.pipe.PipeService;
import net.jxta.platform.JxtaLoader;
import net.jxta.platform.Module;
import net.jxta.platform.ModuleClassID;
import net.jxta.platform.ModuleSpecID;
import net.jxta.protocol.PeerAdvertisement;
import net.jxta.protocol.PeerGroupAdvertisement;
import net.jxta.protocol.ModuleImplAdvertisement;
import net.jxta.rendezvous.RendezVousService;
import net.jxta.resolver.ResolverService;
import net.jxta.service.Service;

import java.io.IOException;
import java.net.URL;
import java.net.MalformedURLException;
import java.net.UnknownServiceException;
import java.lang.ClassNotFoundException;

/**
 * Peer groups are formed
 * as a collection of peers that have agreed upon a common set of services.
 * Each peer group is assigned a unique peer group ID and a peer group
 * advertisement. The peer group advertisement contains a ModuleSpecID
 * which refers to a module specification for this peer group.
 *
 * <p>The peer group specification mandates each of the group services (membership,
 * discovery, resolver, etc). Implementations of that specification are
 * described by ModuleImplAdvertisements which are identified by the group's
 * ModuleSpecID. Implementations are responsible for providing the services mandated
 * by the specification.
 *
 * The java reference implementation achieves
 * this by loading additional Modules which ModuleSpecIDs are listed by the group
 * implementation advertisement.
 *
 * <p>In order to participate in a group, a peer needs to join the group
 * using the peer group membership service.
 *
 * <p> JXTA comes with two subclasses of peer groups:
 *
 * <ul type-disc>
 *
 * <li> <strong>Platform</strong>: this is used to represent the <em>World</em>
 * group. Every peer, when booting, becomes part of this group. This group
 * provides the minimum core services needed to find and instantiate other
 * groups on a peer. <strong>Platform</strong> has the privilege of assigning
 * a new ID to the peer, if it does not already have one. The <em>World</em>
 * group's ID is invariant.</li>
 *
 * <li> <strong>StdPeergroup</strong>: this is currently used to implement
 * all other kinds of peer groups.
 * The first such group that is instantiated after booting is known as
 * <em>The Net Peer Group</em>. When <strong>Platform</strong> starts it may
 * optionaly search for <em>The Net Peer Group</em> on the local network and,
 * if found, instantiate it. Otherwise a default configuration of
 * <em>The Net Peer Group</em> is instanciated.
 *
 * A non-default configuration of <em>The Net Peer Group</em> may be set-up
 * by the administrator in charge of the network domain inside which the peer
 * is booting. <em>The Net Peer Group</em> is discovered via the DiscoveryService
 * protocol. Many such groups may be configured by an administrator.<br>
 *
 * <strong>StdPeergroup</strong> may also be used to implement User-defined
 * peer groups: Users can create new peer groups which use their own set of
 * customized services.
 *</li>
 *</ul>
 *
 * @see         net.jxta.peergroup.PeerGroupID
 * @see         net.jxta.service.Service
 * @see         net.jxta.peergroup.PeerGroupFactory
 * @see         net.jxta.protocol.PeerGroupAdvertisement
 * @see         net.jxta.protocol.ModuleImplAdvertisement
 * @see         net.jxta.platform.ModuleSpecID
 * @see         net.jxta.platform.ModuleClassID
 *
 * @version $Revision: 1.2 $
 * @since JXTA 1.0 */


public interface PeerGroup extends Service {

    /**
     * Look for needed ModuleImplAdvertisement in this group.
     */
    public static final int Here = 0;

    /**
     * Look for needed ModuleImplAdvertisement in the parent group of this group.
     */
    public static final int FromParent = 1;

    /**
     * Look for needed ModuleImplAdvertisement in both this group and its parent.
     */
    public static final int Both = 2;

    /**
     * Default life time for group advertisements in the publisher's cache.
     * (a year)
     */
    public static final long   DEFAULT_LIFETIME = 1000 * 3600 * 24 * 365;

    /**
     * Default expiration time for discovered group advertisements. (2 weeks)
     */
    public static final long   DEFAULT_EXPIRATION = 1000 * 3600 * 24 * 14;

    /**
     * An inner class used to create static well-known identifiers.
     */
    class IdMaker {
        // This method serves to catch the MalformedURLException.
        // Don't know how to catch it from the static init context.
        static ID mkID( String s ) {

            try {
                 return IDFactory.fromURL(new URL( "urn", "", "jxta:uuid-" + s));
            } catch (MalformedURLException absurd) {
                // Fall through.
            } catch (UnknownServiceException absurd2) {
                // Fall through.
            }
            throw new JxtaError("Hardcoded Spec and Class IDs are malformed.");
        }
    }

    /**
     * Well known classes for the basic services.
     * FIXME: we should make a "well-known ID" encoding implementation that
     * has its own little name space of human readable names...later.
     * To keep their string representation shorter, we put our small spec
     * or role pseudo unique ID at the front of the second UUID string.
     * Base classes do not need an explicit second UUID string because it is
     * all 0.
     * The type is always the last two characters, nomatter the total length.
     */

    /**
     * Well known module class identifier: peer group
     */


    public static final ModuleClassID peerGroupClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000001"
              + "05" );


    /**
     * Well known module class identifier: resolver service
     */


    public static final ModuleClassID resolverClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000002"
              + "05" );


    /**
     * Well known module class identifier: discovery service
     */
    public static final ModuleClassID discoveryClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000003"
              + "05" );

    /**
     * Well known module class identifier: pipe service
     */
    public static final ModuleClassID pipeClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000004"
              + "05" );

    /**
     * Well known module class identifier: membership service
     */
    public static final ModuleClassID membershipClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000005"
              + "05" );

    /**
     * Well known module class identifier: rendezvous service
     */
    public static final ModuleClassID rendezvousClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000006"
              + "05" );

    /**
     * Well known module class identifier: peerinfo service
     */
    public static final ModuleClassID peerinfoClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000007"
              + "05" );

    /**
     * Well known module class identifier: endpoint service
     */
    public static final ModuleClassID endpointClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000008"
              + "05" );

    /*
     * FIXME: EndpointProtocols should probably all be of the same class
     * and of different specs and roles... But we'll take a shortcut for now.
     */

    /**
     * Well known module class identifier: tcp protocol
     */
    public static final ModuleClassID tcpProtoClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000009"
              + "05" );

    /**
     * Well known module class identifier: http protocol
     */
    public static final ModuleClassID httpProtoClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe0000000A"
              + "05" );

    /**
     * Well known module class identifier: router protocol
     */
    public static final ModuleClassID routerProtoClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe0000000B"
              + "05" );

    /**
     * Well known module class identifier: application
     */
    public static final ModuleClassID applicationClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe0000000C"
              + "05" );

    /**
     * Well known module class identifier: tlsProtocol
     */
    public static final ModuleClassID tlsProtoClassID = (ModuleClassID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe0000000D"
              + "05" );

    /**
     * Well known group specification identifier: the platform
     */
    public static final ModuleSpecID refPlatformSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000001"
              + "01"
              + "06" );

    /**
     * Well known group specification identifier: the Network Peer Group
     */
    public static final ModuleSpecID refNetPeerGroupSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000001"
              + "02"
              + "06" );

    /**
     * Well known service specification identifier: the standard resolver
     */
    public static final ModuleSpecID refResolverSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000002"
              + "01"
              + "06" );

    /**
     * Well known service specification identifier: the standard discovery
     */
    public static final ModuleSpecID refDiscoverySpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000003"
              + "01"
              + "06" );

    /**
     * Well known service specification identifier: the standard pipe
     */
    public static final ModuleSpecID refPipeSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000004"
              + "01"
              + "06" );

    /**
     * Well known service specification identifier: the standard membership
     */
    public static final ModuleSpecID refMembershipSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000005"
              + "01"
              + "06" );

    /**
     * Well known service specification identifier: the standard rendezvous
     */
    public static final ModuleSpecID refRendezvousSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000006"
              + "01"
              + "06" );

    /**
     * Well known service specification identifier: the standard peerinfo
     */
    public static final ModuleSpecID refPeerinfoSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000007"
              + "01"
              + "06" );

    /**
     * Well known service specification identifier: the standard endpoint
     */
    public static final ModuleSpecID refEndpointSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000008"
              + "01"
              + "06" );

    /**
     * Well known endpoint protocol specification identifier: the standard
     * tcp endpoint protocol
     */
    public static final ModuleSpecID refTcpProtoSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe00000009"
              + "01"
              + "06" );

    /**
     * Well known endpoint protocol specification identifier: the standard
     * http endpoint protocol
     */
    public static final ModuleSpecID refHttpProtoSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe0000000A"
              + "01"
              + "06" );

    /**
     * Well known endpoint protocol specification identifier: the standard
     * router
     */
    public static final ModuleSpecID refRouterProtoSpecID = (ModuleSpecID)
        IdMaker.mkID( "DeadBeefDeafBabaFeedBabe0000000B"
              + "01"