How to use

getGroup

method

in

org.jgroups.stack.GossipData

protected void handleUnregister(DataInput in) {
  GossipData req=readRequest(in, GossipType.UNREGISTER);
  if(req != null)
    removeAddressMapping(req.getGroup(), req.getAddress());
}

protected void handleGetMembersRequest(Address sender, DataInput in) {
  GossipData req=readRequest(in, GossipType.GET_MBRS);
  if(req == null)
    return;
  GossipData rsp=new GossipData(GossipType.GET_MBRS_RSP, req.getGroup(), null);
  Map<Address,Entry> members=address_mappings.get(req.getGroup());
  if(members != null) {
    for(Map.Entry<Address,Entry> entry : members.entrySet()) {
      Address logical_addr=entry.getKey();
      PhysicalAddress phys_addr=entry.getValue().phys_addr;
      String logical_name=entry.getValue().logical_name;
      PingData data=new PingData(logical_addr, true, logical_name, phys_addr);
      rsp.addPingData(data);
    }
  }
  ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(rsp.serializedSize());
  try {
    rsp.writeTo(out);
    server.send(sender, out.buffer(), 0, out.position());
  }
  catch(Exception ex) {
    log.error("failed sending %d to %s: %s", GossipType.GET_MBRS_RSP, sender, ex);
  }
}

protected void handleRegister(Address sender, DataInput in) {
  GossipData req=readRequest(in, GossipType.REGISTER);
  if(req != null) {
    String          group=req.getGroup();
    Address         addr=req.getAddress();
    PhysicalAddress phys_addr=req.getPhysicalAddress();
    String          logical_name=req.getLogicalName();
    addAddressMapping(sender, group, addr, phys_addr, logical_name);
  }
}

public void receive(Address sender, DataInput in) throws Exception {
  GossipData data=new GossipData();
  data.readFrom(in);
  switch(data.getType()) {
    case MESSAGE:
    case SUSPECT:
      if(receiver != null)
        receiver.receive(data);
      break;
    case GET_MBRS_RSP:
      notifyResponse(data.getGroup(), data.getPingData());
      break;
  }
}

@Override
public void receive(Address sender, byte[] buf, int offset, int length) {
  ByteArrayDataInputStream in=new ByteArrayDataInputStream(buf, offset, length);
  GossipData data=new GossipData();
  try {
    data.readFrom(in);
    switch(data.getType()) {
      case MESSAGE:
      case SUSPECT:
        if(receiver != null)
          receiver.receive(data);
        break;
      case GET_MBRS_RSP:
        notifyResponse(data.getGroup(), data.getPingData());
        break;
    }
  }
  catch(Exception ex) {
    log.error(Util.getMessage("FailedReadingData"), ex);
  }
}

protected void handleUnregister(DataInput in) {
  GossipData req=readRequest(in, GossipType.UNREGISTER);
  if(req != null)
    removeAddressMapping(req.getGroup(), req.getAddress());
}

protected void handleGetMembersRequest(Address sender, DataInput in) {
  GossipData req=readRequest(in, GossipType.GET_MBRS);
  if(req == null)
    return;
  GossipData rsp=new GossipData(GossipType.GET_MBRS_RSP, req.getGroup(), null);
  Map<Address,Entry> members=address_mappings.get(req.getGroup());
  if(members != null) {
    for(Map.Entry<Address,Entry> entry : members.entrySet()) {
      Address logical_addr=entry.getKey();
      PhysicalAddress phys_addr=entry.getValue().phys_addr;
      String logical_name=entry.getValue().logical_name;
      PingData data=new PingData(logical_addr, true, logical_name, phys_addr);
      rsp.addPingData(data);
    }
  }
  ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(rsp.serializedSize());
  try {
    rsp.writeTo(out);
    server.send(sender, out.buffer(), 0, out.position());
  }
  catch(Exception ex) {
    log.error("failed sending %d to %s: %s", GossipType.GET_MBRS_RSP, sender, ex);
  }
}

protected void handleRegister(Address sender, DataInput in) {
  GossipData req=readRequest(in, GossipType.REGISTER);
  if(req != null) {
    String          group=req.getGroup();
    Address         addr=req.getAddress();
    PhysicalAddress phys_addr=req.getPhysicalAddress();
    String          logical_name=req.getLogicalName();
    addAddressMapping(sender, group, addr, phys_addr, logical_name);
  }
}

case GossipRouter.REGISTER:
  mbr=req.getAddress();
  group=req.getGroup();
  if(log.isTraceEnabled())
    log.trace("REGISTER(" + group + ", " + mbr + ")");
  group=req.getGroup();
  if(log.isTraceEnabled())
    log.trace("UNREGISTER(" + group + ", " + mbr + ")");
  group=req.getGroup();
  List<Address> mbrs=null;
  Map<Address,AddressEntry> map;
  group=req.getGroup();
  output=new DataOutputStream(sock.getOutputStream());
  output=new DataOutputStream(sock.getOutputStream());
  logical_addr=req.getAddress();
  String group_name=req.getGroup();
  group_name=req.getGroup();
  removeEntry(group_name, addr);
  if(log.isTraceEnabled())

public void receive(Address sender, DataInput in) throws Exception {
  GossipData data=new GossipData();
  data.readFrom(in);
  switch(data.getType()) {
    case MESSAGE:
    case SUSPECT:
      if(receiver != null)
        receiver.receive(data);
      break;
    case GET_MBRS_RSP:
      notifyResponse(data.getGroup(), data.getPingData());
      break;
  }
}

@Override
public void receive(Address sender, byte[] buf, int offset, int length) {
  ByteArrayDataInputStream in=new ByteArrayDataInputStream(buf, offset, length);
  GossipData data=new GossipData();
  try {
    data.readFrom(in);
    switch(data.getType()) {
      case MESSAGE:
      case SUSPECT:
        if(receiver != null)
          receiver.receive(data);
        break;
      case GET_MBRS_RSP:
        notifyResponse(data.getGroup(), data.getPingData());
        break;
    }
  }
  catch(Exception ex) {
    log.error(Util.getMessage("FailedReadingData"), ex);
  }
}