Examples of org.jgroups.protocols.pbcast.NAKACK2

org.jgroups.protocols.pbcast.NAKACK2
Negative AcKnowledgement layer (NAKs). Messages are assigned a monotonically increasing sequence number (seqno). Receivers deliver messages ordered according to seqno and request retransmission of missing messages.
Retransmit requests are usually sent to the original sender of a message, but this can be changed by xmit_from_random_member (send to random member) or use_mcast_xmit_req (send to everyone). Responses can also be sent to everyone instead of the requester by setting use_mcast_xmit to true. @author Bela Ban

        for(int i=0; i < NUM; i++) {
            channels[i]= new JChannel(new SHARED_LOOPBACK(),
                                      new SHARED_LOOPBACK_PING(),
                                      new MERGE3(),
                                      new FD().setValue("timeout", 1000).setValue("max_tries", 1),
                                      new NAKACK2(),
                                      new UNICAST3(),
                                      new STABLE(),
                                      new GMS(),
                                      new RSVP().setValue("ack_on_delivery", false)
                                        .setValue("throw_exception_on_timeout", false));

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                new MERGE3(),
                new FD_SOCK(),
                new FD_ALL().setValue("timeout", 12000).setValue("interval", 3000),
                new VERIFY_SUSPECT(),
                new BARRIER(),
                new NAKACK2(),
                new UNICAST3(),
                new STABLE(),
                new GMS(),
                new UFC(),
                new MFC(),

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        JChannel ch=Util.createChannel(tunnel,
                                       new PING(),
                                       new MERGE3().setValue("min_interval", 1000).setValue("max_interval", 3000),
                                       new FD().setValue("timeout", 2000).setValue("max_tries", 2),
                                       new VERIFY_SUSPECT(),
                                       new NAKACK2().setValue("use_mcast_xmit", false),
                                       new UNICAST3(), new STABLE(), new GMS().joinTimeout(1000));
        if(name != null)
            ch.setName(name);
        return ch;
    }

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    }


    protected static JChannel createChannel() throws Exception {
        return new JChannel(new SHARED_LOOPBACK(),
                            new SHARED_LOOPBACK_PING(),
                            new NAKACK2().setValue("use_mcast_xmit", false),
                            new UNICAST3(),
                            new STABLE().setValue("max_bytes", 50000),
                            new GMS().setValue("print_local_addr", false),
                            new UFC(),
                            new MFC(),

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    protected JChannel create(String name, boolean use_batching) throws Exception {
        Protocol[] protocols={
          new SHARED_LOOPBACK(),
          new SHARED_LOOPBACK_PING().timeout(1000),
          new NAKACK2(),
          new MAKE_BATCH().sleepTime(100).unicasts(use_batching),
          new UNICAST3(),
          new STABLE(),
          new GMS(),
          new FRAG2().fragSize(8000),

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    protected JChannel createChannel(String name) throws Exception {
        JChannel retval=new JChannel(new SHARED_LOOPBACK(),
                                     new DISCARD().setValue("discard_all",true),
                                     new SHARED_LOOPBACK_PING(),
                                     new NAKACK2().setValue("use_mcast_xmit",false)
                                       .setValue("log_discard_msgs",false).setValue("log_not_found_msgs",false),
                                     new UNICAST3(),
                                     new STABLE().setValue("max_bytes",50000),
                                     new GMS().setValue("print_local_addr",false)
                                       .setValue("join_timeout", 1)

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        Collections.sort(members);
        Address coord=members.get(0);
        View view=new View(coord, 2, members);
        MutableDigest digest=new MutableDigest(view.getMembersRaw());
        for(JChannel ch: channels) {
            NAKACK2 nakack=(NAKACK2)ch.getProtocolStack().findProtocol(NAKACK2.class);
            digest.merge(nakack.getDigest(ch.getAddress()));
        }
        for(JChannel ch: channels) {
            GMS gms=(GMS)ch.getProtocolStack().findProtocol(GMS.class);
            gms.installView(view, digest);
        }

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                                           new DISCARD().setValue("discard_all",true),
                                           new SHARED_LOOPBACK_PING().setValue("force_sending_discovery_rsps", true),
                                           new MERGE3().setValue("min_interval",1000)
                                             .setValue("max_interval",5000)
                                             .setValue("max_participants_in_merge", MAX_PARTICIPANTS_IN_MERGE),
                                           new NAKACK2().setValue("use_mcast_xmit",false)
                                             .setValue("discard_delivered_msgs",true)
                                             .setValue("log_discard_msgs",false).setValue("log_not_found_msgs",false)
                                             .setValue("xmit_table_num_rows",5)
                                             .setValue("xmit_table_msgs_per_row",10),
                                           new UNICAST3().setValue("xmit_table_num_rows",5)

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     */
    public static Protocol[] getTestStack(Protocol... additional_protocols) {
        Protocol[] protocols={
          new SHARED_LOOPBACK(),
          new SHARED_LOOPBACK_PING().timeout(1000),
          new NAKACK2(),
          new UNICAST3(),
          new STABLE(),
          new GMS().joinTimeout(1000),
          new FRAG2().fragSize(8000)
        };

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          new MERGE3(),
          new FD_SOCK(),
          new FD_ALL(),
          new VERIFY_SUSPECT(),
          new BARRIER(),
          new NAKACK2(),
          new UNICAST3(),
          new STABLE(),
          new GMS(),
          new UFC(),
          new MFC(),

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