Exemplo n.º 1
0
 protected void deliver(Message msg, Event evt, SequencerHeader hdr) {
   Address sender = msg.getSrc();
   if (sender == null) {
     if (log.isErrorEnabled())
       log.error(local_addr + ": sender is null, cannot deliver " + "::" + hdr.getSeqno());
     return;
   }
   long msg_seqno = hdr.getSeqno();
   if (sender.equals(local_addr)) {
     forward_table.remove(msg_seqno);
     if (hdr.flush_ack) {
       ack_promise.setResult(msg_seqno);
       if (ack_mode && !flushing && threshold > 0 && ++num_acks >= threshold) {
         ack_mode = false;
         num_acks = 0;
       }
     }
   }
   if (!canDeliver(sender, msg_seqno)) {
     if (log.isWarnEnabled())
       log.warn(local_addr + ": dropped duplicate message " + sender + "::" + msg_seqno);
     return;
   }
   if (log.isTraceEnabled()) log.trace(local_addr + ": delivering " + sender + "::" + msg_seqno);
   up_prot.up(evt);
   delivered_bcasts++;
 }
Exemplo n.º 2
0
 protected void unblockAll() {
   flushing = false;
   send_lock.lock();
   try {
     send_cond.signalAll();
     ack_promise.setResult(null);
   } finally {
     send_lock.unlock();
   }
 }
Exemplo n.º 3
0
  protected void stopFlusher() {
    flushing = false;
    Thread tmp = flusher;

    while (tmp != null && tmp.isAlive()) {
      tmp.interrupt();
      ack_promise.setResult(null);
      try {
        tmp.join();
      } catch (InterruptedException e) {
      }
    }
  }
Exemplo n.º 4
0
  public void sendDiscoveryRequest(String cluster_name, Promise promise, ViewId view_id)
      throws Exception {
    PingData data = null;
    PhysicalAddress physical_addr =
        (PhysicalAddress) down(new Event(Event.GET_PHYSICAL_ADDRESS, local_addr));

    if (view_id == null) {
      List<PhysicalAddress> physical_addrs = Arrays.asList(physical_addr);
      data = new PingData(local_addr, null, false, UUID.get(local_addr), physical_addrs);
    }

    PingHeader hdr = new PingHeader(PingHeader.GET_MBRS_REQ, data, cluster_name);
    hdr.view_id = view_id;

    Collection<PhysicalAddress> cluster_members = fetchClusterMembers(cluster_name);
    if (cluster_members == null) {
      Message msg = new Message(null); // multicast msg
      msg.setFlag(Message.OOB);
      msg.putHeader(getId(), hdr);
      sendMcastDiscoveryRequest(msg);
    } else {
      if (cluster_members.isEmpty()) { // if we don't find any members, return immediately
        if (promise != null) promise.setResult(null);
      } else {
        for (final Address addr : cluster_members) {
          if (addr.equals(physical_addr)) // no need to send the request to myself
          continue;
          final Message msg = new Message(addr, null, null);
          msg.setFlag(Message.OOB);
          msg.putHeader(this.id, hdr);
          if (log.isTraceEnabled())
            log.trace("[FIND_INITIAL_MBRS] sending discovery request to " + msg.getDest());
          if (!sendDiscoveryRequestsInParallel()) {
            down_prot.down(new Event(Event.MSG, msg));
          } else {
            timer.execute(
                new Runnable() {
                  public void run() {
                    try {
                      down_prot.down(new Event(Event.MSG, msg));
                    } catch (Exception ex) {
                      if (log.isErrorEnabled())
                        log.error("failed sending discovery request to " + addr + ": " + ex);
                    }
                  }
                });
          }
        }
      }
    }
  }
Exemplo n.º 5
0
  /**
   * Callback method <br>
   * Called by the ProtocolStack when a message is received.
   *
   * @param evt the event carrying the message from the protocol stack
   */
  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        if (stats) {
          received_msgs++;
          received_bytes += msg.getLength();
        }

        // discard local messages (sent by myself to me)
        if (discard_own_messages
            && local_addr != null
            && msg.getSrc() != null
            && local_addr.equals(msg.getSrc())) return null;
        break;

      case Event.VIEW_CHANGE:
        View tmp = (View) evt.getArg();
        if (tmp instanceof MergeView) my_view = new View(tmp.getViewId(), tmp.getMembers());
        else my_view = tmp;

        // Bela&Vladimir Oct 27th,2006 (JGroups 2.4): we need to set connected=true because a client
        // can
        // call channel.getView() in viewAccepted() callback invoked on this thread (see
        // Event.VIEW_CHANGE handling below)

        // not good: we are only connected when we returned from connect() - bela June 22 2007
        // Changed: when a channel gets a view of which it is a member then it should be
        // connected even if connect() hasn't returned yet ! (bela Noc 2010)
        if (state != State.CONNECTED) state = State.CONNECTED;
        break;

      case Event.CONFIG:
        Map<String, Object> cfg = (Map<String, Object>) evt.getArg();
        if (cfg != null) {
          if (cfg.containsKey("state_transfer")) {
            state_transfer_supported = (Boolean) cfg.get("state_transfer");
          }
          if (cfg.containsKey("flush_supported")) {
            flush_supported = (Boolean) cfg.get("flush_supported");
          }
        }
        break;

      case Event.GET_STATE_OK:
        StateTransferResult result = (StateTransferResult) evt.getArg();
        if (up_handler != null) {
          try {
            Object retval = up_handler.up(evt);
            state_promise.setResult(new StateTransferResult());
            return retval;
          } catch (Throwable t) {
            state_promise.setResult(new StateTransferResult(t));
          }
        }

        if (receiver != null) {
          try {
            if (result.hasBuffer()) {
              byte[] tmp_state = result.getBuffer();
              ByteArrayInputStream input = new ByteArrayInputStream(tmp_state);
              receiver.setState(input);
            }
            state_promise.setResult(result);
          } catch (Throwable t) {
            state_promise.setResult(new StateTransferResult(t));
          }
        }
        break;

      case Event.STATE_TRANSFER_INPUTSTREAM_CLOSED:
        state_promise.setResult((StateTransferResult) evt.getArg());
        break;

      case Event.STATE_TRANSFER_INPUTSTREAM:
        // Oct 13,2006 moved to down() when Event.STATE_TRANSFER_INPUTSTREAM_CLOSED is received
        // state_promise.setResult(is != null? Boolean.TRUE : Boolean.FALSE);

        if (up_handler != null) return up_handler.up(evt);

        InputStream is = (InputStream) evt.getArg();
        if (is != null && receiver != null) {
          try {
            receiver.setState(is);
          } catch (Throwable t) {
            throw new RuntimeException("failed calling setState() in state requester", t);
          }
        }
        break;

      case Event.STATE_TRANSFER_OUTPUTSTREAM:
        if (receiver != null && evt.getArg() != null) {
          try {
            receiver.getState((OutputStream) evt.getArg());
          } catch (Exception e) {
            throw new RuntimeException("failed calling getState() in state provider", e);
          }
        }
        break;

      case Event.GET_LOCAL_ADDRESS:
        return local_addr;

      default:
        break;
    }

    // If UpHandler is installed, pass all events to it and return (UpHandler is e.g. a building
    // block)
    if (up_handler != null) return up_handler.up(evt);

    if (receiver != null) return invokeCallback(evt.getType(), evt.getArg());
    return null;
  }