Exemple #1
0
 private static void _testMessage(Message msg) throws Exception {
   Buffer buf = Util.messageToByteBuffer(msg);
   Message msg2 = Util.byteBufferToMessage(buf.getBuf(), buf.getOffset(), buf.getLength());
   Assert.assertEquals(msg.getSrc(), msg2.getSrc());
   Assert.assertEquals(msg.getDest(), msg2.getDest());
   Assert.assertEquals(msg.getLength(), msg2.getLength());
 }
Exemple #2
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  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        LockingHeader hdr = (LockingHeader) msg.getHeader(id);
        if (hdr == null) break;

        Request req = (Request) msg.getObject();
        if (log.isTraceEnabled())
          log.trace("[" + local_addr + "] <-- [" + msg.getSrc() + "] " + req);
        switch (req.type) {
          case GRANT_LOCK:
          case RELEASE_LOCK:
            handleLockRequest(req);
            break;
          case LOCK_GRANTED:
            handleLockGrantedResponse(req.lock_name, req.owner, msg.getSrc());
            break;
          case LOCK_DENIED:
            handleLockDeniedResponse(req.lock_name, req.owner);
            break;
          case CREATE_LOCK:
            handleCreateLockRequest(req.lock_name, req.owner);
            break;
          case DELETE_LOCK:
            handleDeleteLockRequest(req.lock_name);
            break;
          case COND_SIG:
          case COND_SIG_ALL:
            handleSignalRequest(req);
            break;
          case LOCK_AWAIT:
            handleAwaitRequest(req.lock_name, req.owner);
            handleLockRequest(req);
            break;
          case DELETE_LOCK_AWAIT:
            handleDeleteAwaitRequest(req.lock_name, req.owner);
            break;
          case SIG_RET:
            handleSignalResponse(req.lock_name, req.owner);
            break;
          case CREATE_AWAITER:
            handleCreateAwaitingRequest(req.lock_name, req.owner);
            break;
          case DELETE_AWAITER:
            handleDeleteAwaitingRequest(req.lock_name, req.owner);
            break;
          default:
            log.error("Request of type " + req.type + " not known");
            break;
        }
        return null;

      case Event.VIEW_CHANGE:
        handleView((View) evt.getArg());
        break;
    }
    return up_prot.up(evt);
  }
Exemple #3
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  void handleMessage(Message msg) {
    Event evt;
    UdpHeader hdr;

    // discard my own multicast loopback copy
    if (loopback) {
      Address dst = msg.getDest();
      Address src = msg.getSrc();

      if (dst != null && dst.isMulticastAddress() && src != null && local_addr.equals(src)) {
        if (Trace.debug) {
          Trace.info("UDP.handleMessage()", "discarded own loopback multicast packet");
        }
        return;
      }
    }

    evt = new Event(Event.MSG, msg);
    if (Trace.debug) {
      Trace.info("UDP.handleMessage()", "message is " + msg + ", headers are " + msg.getHeaders());

      /* Because Protocol.up() is never called by this bottommost layer, we call up() directly in the observer.
       * This allows e.g. PerfObserver to get the time of reception of a message */
    }
    if (observer != null) {
      observer.up(evt, up_queue.size());
    }
    hdr = (UdpHeader) msg.removeHeader(name);
    if (hdr != null) {

      /* Discard all messages destined for a channel with a different name */
      String ch_name = null;

      if (hdr.group_addr != null) {
        ch_name = hdr.group_addr;

        // Discard if message's group name is not the same as our group name unless the
        // message is a diagnosis message (special group name DIAG_GROUP)
      }
      if (ch_name != null
          && group_addr != null
          && !group_addr.equals(ch_name)
          && !ch_name.equals(Util.DIAG_GROUP)) {
        if (Trace.trace) {
          Trace.warn(
              "UDP.handleMessage()",
              "discarded message from different group ("
                  + ch_name
                  + "). Sender was "
                  + msg.getSrc());
        }
        return;
      }
    } else {
      Trace.error("UDP.handleMessage()", "message does not have a UDP header");
    }
    passUp(evt);
  }
  /** When receive a message, analyze message content and then execute the command: Draw or Clear */
  public void receive(Message msg) {
    byte[] buf = msg.getRawBuffer();
    if (buf == null) {
      System.err.println(
          "["
              + channel.getAddress()
              + "] received null buffer from "
              + msg.getSrc()
              + ", headers: "
              + msg.printHeaders());
      return;
    }

    try {
      DrawCommand comm =
          (DrawCommand)
              Util.streamableFromByteBuffer(
                  DrawCommand.class, buf, msg.getOffset(), msg.getLength());
      switch (comm.mode) {
        case DrawCommand.DRAW:
          if (drawPanel != null) drawPanel.drawPoint(comm);
          break;
        case DrawCommand.CLEAR:
          clearPanel();
        default:
          System.err.println("***** received invalid draw command " + comm.mode);
          break;
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
Exemple #5
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  /**
   * Message contains MethodCall. Execute it against *this* object and return result. Use
   * MethodCall.invoke() to do this. Return result.
   */
  public Object handle(Message req) throws Exception {
    if (server_obj == null) {
      log.error(Util.getMessage("NoMethodHandlerIsRegisteredDiscardingRequest"));
      return null;
    }

    if (req == null || req.getLength() == 0) {
      log.error(Util.getMessage("MessageOrMessageBufferIsNull"));
      return null;
    }

    Object body =
        req_marshaller != null
            ? req_marshaller.objectFromBuffer(req.getRawBuffer(), req.getOffset(), req.getLength())
            : req.getObject();

    if (!(body instanceof MethodCall))
      throw new IllegalArgumentException("message does not contain a MethodCall object");

    MethodCall method_call = (MethodCall) body;

    if (log.isTraceEnabled()) log.trace("[sender=%s], method_call: %s", req.getSrc(), method_call);

    if (method_call.getMode() == MethodCall.ID) {
      if (method_lookup == null)
        throw new Exception(
            String.format(
                "MethodCall uses ID=%d, but method_lookup has not been set", method_call.getId()));
      Method m = method_lookup.findMethod(method_call.getId());
      if (m == null) throw new Exception("no method found for " + method_call.getId());
      method_call.setMethod(m);
    }

    return method_call.invoke(server_obj);
  }
Exemple #6
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  private void encryptAndSend(Message msg) throws Exception {
    EncryptHeader hdr = new EncryptHeader(EncryptHeader.ENCRYPT, getSymVersion());
    if (this.encrypt_entire_message) hdr.type |= EncryptHeader.ENCRYPT_ENTIRE_MSG;

    if (encrypt_entire_message) {
      if (msg.getSrc() == null) msg.setSrc(local_addr);

      Buffer serialized_msg = Util.streamableToBuffer(msg);
      byte[] encrypted_msg =
          code(
              serialized_msg.getBuf(),
              serialized_msg.getOffset(),
              serialized_msg.getLength(),
              false);

      // exclude existing headers, they will be seen again when we decrypt and unmarshal the msg at
      // the receiver
      Message tmp = msg.copy(false, false).setBuffer(encrypted_msg).putHeader(this.id, hdr);
      down_prot.down(new Event(Event.MSG, tmp));
      return;
    }

    // copy neeeded because same message (object) may be retransmitted -> no double encryption
    Message msgEncrypted =
        msg.copy(false)
            .putHeader(this.id, hdr)
            .setBuffer(code(msg.getRawBuffer(), msg.getOffset(), msg.getLength(), false));
    down_prot.down(new Event(Event.MSG, msgEncrypted));
  }
Exemple #7
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  public void up(MessageBatch batch) {
    if (batch.dest() == null) { // not a unicast batch
      up_prot.up(batch);
      return;
    }

    int size = batch.size();
    Map<Short, List<Message>> msgs =
        new TreeMap<Short, List<Message>>(); // map of messages, keyed by conn-id
    for (Message msg : batch) {
      if (msg == null || msg.isFlagSet(Message.Flag.NO_RELIABILITY)) continue;
      UnicastHeader hdr = (UnicastHeader) msg.getHeader(id);
      if (hdr == null) continue;
      batch.remove(msg); // remove the message from the batch, so it won't be passed up the stack

      if (hdr.type != UnicastHeader.DATA) {
        try {
          handleUpEvent(msg.getSrc(), hdr);
        } catch (Throwable t) { // we cannot let an exception terminate the processing of this batch
          log.error(local_addr + ": failed handling event", t);
        }
        continue;
      }

      List<Message> list = msgs.get(hdr.conn_id);
      if (list == null) msgs.put(hdr.conn_id, list = new ArrayList<Message>(size));
      list.add(msg);
    }

    if (!msgs.isEmpty()) handleBatchReceived(batch.sender(), msgs); // process msgs:
    if (!batch.isEmpty()) up_prot.up(batch);
  }
Exemple #8
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  private Message _decrypt(final Cipher cipher, Message msg, boolean decrypt_entire_msg)
      throws Exception {
    byte[] decrypted_msg;
    if (cipher == null)
      decrypted_msg = code(msg.getRawBuffer(), msg.getOffset(), msg.getLength(), true);
    else decrypted_msg = cipher.doFinal(msg.getRawBuffer(), msg.getOffset(), msg.getLength());

    if (!decrypt_entire_msg) {
      msg.setBuffer(decrypted_msg);
      return msg;
    }

    Message ret = Util.streamableFromBuffer(Message.class, decrypted_msg, 0, decrypted_msg.length);
    if (ret.getDest() == null) ret.setDest(msg.getDest());
    if (ret.getSrc() == null) ret.setSrc(msg.getSrc());
    return ret;
  }
Exemple #9
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  protected void handleUpEvent(Message msg, EncryptHeader hdr) {
    // check if we had some sort of encrypt control header if using supplied key we should not
    // process it
    if (suppliedKey) {
      log.warn("we received an encrypt header of %s while in configured mode", hdr.getType());
      return;
    }

    // see what sort of encrypt control message we have received
    switch (hdr.getType()) {
        // if a key request
      case EncryptHeader.KEY_REQUEST:
        log.debug("received a key request from peer %s", msg.getSrc());

        // if a key request send response key back
        try {
          // extract peer's public key
          PublicKey tmpKey = generatePubKey(msg.getBuffer());
          // send back the secret key we have
          sendSecretKey(getSecretKey(), tmpKey, msg.getSrc());
        } catch (Exception e) {
          log.warn("unable to reconstitute peer's public key");
        }
        break;
      case EncryptHeader.SECRETKEY:
        log.debug("received a secretkey response from keyserver %s", msg.getSrc());

        try {
          SecretKey tmp = decodeKey(msg.getBuffer());
          if (tmp == null) sendKeyRequest(); // unable to understand response, let's try again
          else {
            // otherwise lets set the returned key as the shared key
            setKeys(tmp, hdr.getVersion());
            log.debug("decoded secretkey response");
          }
        } catch (Exception e) {
          log.warn("unable to process received public key", e);
        }
        break;
      default:
        log.warn("received ignored encrypt header of %s", hdr.getType());
        break;
    }
  }
Exemple #10
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  public Object up(Event evt) {
    Message msg;
    Address dst, src;
    Unicast2Header hdr;

    switch (evt.getType()) {
      case Event.MSG:
        msg = (Message) evt.getArg();
        dst = msg.getDest();

        if (dst == null || msg.isFlagSet(Message.NO_RELIABILITY)) // only handle unicast messages
        break; // pass up

        // changed from removeHeader(): we cannot remove the header because if we do loopback=true
        // at the
        // transport level, we will not have the header on retransmit ! (bela Aug 22 2006)
        hdr = (Unicast2Header) msg.getHeader(this.id);
        if (hdr == null) break;
        src = msg.getSrc();
        switch (hdr.type) {
          case Unicast2Header.DATA: // received regular message
            handleDataReceived(src, hdr.seqno, hdr.conn_id, hdr.first, msg, evt);
            return null; // we pass the deliverable message up in handleDataReceived()
          case Unicast2Header.XMIT_REQ: // received ACK for previously sent message
            handleXmitRequest(src, hdr.seqno, hdr.high_seqno);
            break;
          case Unicast2Header.SEND_FIRST_SEQNO:
            handleResendingOfFirstMessage(src, hdr.seqno);
            break;
          case Unicast2Header.STABLE:
            stable(msg.getSrc(), hdr.conn_id, hdr.seqno, hdr.high_seqno);
            break;
          default:
            log.error("UnicastHeader type " + hdr.type + " not known !");
            break;
        }
        return null;
    }

    return up_prot.up(evt); // Pass up to the layer above us
  }
  /**
   * Message contains MethodCall. Execute it against *this* object and return result. Use
   * MethodCall.invoke() to do this. Return result.
   */
  public Object handle(Message req) {
    Object body;
    MethodCall method_call;

    if (server_obj == null) {
      if (log.isErrorEnabled()) log.error("no method handler is registered. Discarding request.");
      return null;
    }

    if (req == null || req.getLength() == 0) {
      if (log.isErrorEnabled()) log.error("message or message buffer is null");
      return null;
    }

    try {
      body =
          req_marshaller != null
              ? req_marshaller.objectFromByteBuffer(
                  req.getBuffer(), req.getOffset(), req.getLength())
              : req.getObject();
    } catch (Throwable e) {
      if (log.isErrorEnabled()) log.error("exception marshalling object", e);
      return e;
    }

    if (!(body instanceof MethodCall)) {
      if (log.isErrorEnabled()) log.error("message does not contain a MethodCall object");

      // create an exception to represent this and return it
      return new IllegalArgumentException("message does not contain a MethodCall object");
    }

    method_call = (MethodCall) body;

    try {
      if (log.isTraceEnabled())
        log.trace("[sender=" + req.getSrc() + "], method_call: " + method_call);

      if (method_call.getMode() == MethodCall.ID) {
        if (method_lookup == null)
          throw new Exception(
              "MethodCall uses ID=" + method_call.getId() + ", but method_lookup has not been set");
        Method m = method_lookup.findMethod(method_call.getId());
        if (m == null) throw new Exception("no method found for " + method_call.getId());
        method_call.setMethod(m);
      }

      return method_call.invoke(server_obj);
    } catch (Throwable x) {
      return x;
    }
  }
Exemple #12
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  /** Send a message to the address specified in dest */
  void sendUdpMessage(Message msg) throws Exception {
    IpAddress dest;
    Message copy;
    Event evt;

    dest = (IpAddress) msg.getDest(); // guaranteed not to be null
    setSourceAddress(msg);

    if (Trace.debug) {
      Trace.debug(
          "UDP.sendUdpMessage()",
          "sending message to "
              + msg.getDest()
              + " (src="
              + msg.getSrc()
              + "), headers are "
              + msg.getHeaders());

      // Don't send if destination is local address. Instead, switch dst and src and put in
      // up_queue.
      // If multicast message, loopback a copy directly to us (but still multicast). Once we receive
      // this,
      // we will discard our own multicast message
    }
    if (loopback && (dest.equals(local_addr) || dest.isMulticastAddress())) {
      copy = msg.copy();
      copy.removeHeader(name);
      copy.setSrc(local_addr);
      copy.setDest(dest);
      evt = new Event(Event.MSG, copy);

      /* Because Protocol.up() is never called by this bottommost layer, we call up() directly in the observer.
      This allows e.g. PerfObserver to get the time of reception of a message */
      if (observer != null) {
        observer.up(evt, up_queue.size());
      }
      if (Trace.debug) {
        Trace.info("UDP.sendUdpMessage()", "looped back local message " + copy);
      }
      passUp(evt);
      if (!dest.isMulticastAddress()) {
        return;
      }
    }

    if (use_outgoing_packet_handler) {
      outgoing_queue.add(msg);
      return;
    }

    send(msg);
  }
Exemple #13
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  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        StateHeader hdr = (StateHeader) msg.getHeader(this.id);
        if (hdr == null) break;

        switch (hdr.type) {
          case StateHeader.STATE_REQ:
            state_requesters.add(msg.getSrc());
            break;
          case StateHeader.STATE_RSP:
            handleStateRsp(hdr.getDigest(), msg.getSrc(), msg.getBuffer());
            break;
          case StateHeader.STATE_EX:
            closeHoleFor(msg.getSrc());
            handleException((Throwable) msg.getObject());
            break;
          default:
            log.error("%s: type %s not known in StateHeader", local_addr, hdr.type);
            break;
        }
        return null;

      case Event.TMP_VIEW:
      case Event.VIEW_CHANGE:
        handleViewChange((View) evt.getArg());
        break;

      case Event.CONFIG:
        Map<String, Object> config = (Map<String, Object>) evt.getArg();
        if (config != null && config.containsKey("state_transfer"))
          log.error(
              Util.getMessage(
                  "ProtocolStackCannotContainTwoStateTransferProtocolsRemoveEitherOneOfThem"));
        break;
    }
    return up_prot.up(evt);
  }
Exemple #14
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    public Message visit(Message msg, MessageBatch batch) {
      EncryptHeader hdr;

      if (msg == null
          || (msg.getLength() == 0 && !encrypt_entire_message)
          || ((hdr = (EncryptHeader) msg.getHeader(id)) == null)) return null;

      if (hdr.getType() == EncryptHeader.ENCRYPT) {
        // if queueing then pass into queue to be dealt with later
        if (queue_up) {
          queueUpMessage(msg, batch);
          return null;
        }

        // make sure we pass up any queued messages first
        if (!suppliedKey) drainUpQueue();

        if (lock == null) {
          int index = getNextIndex();
          lock = decoding_locks[index];
          cipher = decoding_ciphers[index];
          lock.lock();
        }

        try {
          Message tmpMsg = decryptMessage(cipher, msg.copy()); // need to copy for possible xmits
          if (tmpMsg != null) batch.replace(msg, tmpMsg);
        } catch (Exception e) {
          log.error(
              "failed decrypting message from %s (offset=%d, length=%d, buf.length=%d): %s, headers are %s",
              msg.getSrc(),
              msg.getOffset(),
              msg.getLength(),
              msg.getRawBuffer().length,
              e,
              msg.printHeaders());
        }
      } else {
        batch.remove(
            msg); // a control message will get handled by ENCRYPT and should not be passed up
        handleUpEvent(msg, hdr);
      }
      return null;
    }
Exemple #15
0
  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        if (msg.getDest() == null
            || msg.isFlagSet(Message.Flag.NO_RELIABILITY)) // only handle unicast messages
        break; // pass up

        UnicastHeader hdr = (UnicastHeader) msg.getHeader(this.id);
        if (hdr == null) break;
        Address sender = msg.getSrc();
        switch (hdr.type) {
          case UnicastHeader.DATA: // received regular message
            handleDataReceived(sender, hdr.seqno, hdr.conn_id, hdr.first, msg, evt);
            break;
          default:
            handleUpEvent(sender, hdr);
            break;
        }
        return null;
    }
    return up_prot.up(evt); // Pass up to the layer above us
  }
Exemple #16
0
  @SuppressWarnings("unchecked")
  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        PingHeader hdr = (PingHeader) msg.getHeader(this.id);
        if (hdr == null) return up_prot.up(evt);

        if (is_leaving) return null; // prevents merging back a leaving member
        // (https://issues.jboss.org/browse/JGRP-1336)

        PingData data = readPingData(msg.getRawBuffer(), msg.getOffset(), msg.getLength());
        Address logical_addr = data != null ? data.getAddress() : msg.src();

        switch (hdr.type) {
          case PingHeader.GET_MBRS_REQ: // return Rsp(local_addr, coord)
            if (cluster_name == null || hdr.cluster_name == null) {
              log.warn(
                  "cluster_name (%s) or cluster_name of header (%s) is null; passing up discovery "
                      + "request from %s, but this should not be the case",
                  cluster_name, hdr.cluster_name, msg.src());
            } else {
              if (!cluster_name.equals(hdr.cluster_name)) {
                log.warn(
                    "%s: discarding discovery request for cluster '%s' from %s; "
                        + "our cluster name is '%s'. Please separate your clusters properly",
                    logical_addr, hdr.cluster_name, msg.src(), cluster_name);
                return null;
              }
            }

            // add physical address and logical name of the discovery sender (if available) to the
            // cache
            if (data != null) {
              addDiscoveryResponseToCaches(
                  logical_addr, data.getLogicalName(), data.getPhysicalAddr());
              discoveryRequestReceived(msg.getSrc(), data.getLogicalName(), data.getPhysicalAddr());
              addResponse(data, false);
            }

            if (return_entire_cache) {
              Map<Address, PhysicalAddress> cache =
                  (Map<Address, PhysicalAddress>)
                      down(new Event(Event.GET_LOGICAL_PHYSICAL_MAPPINGS));
              if (cache != null) {
                for (Map.Entry<Address, PhysicalAddress> entry : cache.entrySet()) {
                  Address addr = entry.getKey();
                  // JGRP-1492: only return our own address, and addresses in view.
                  if (addr.equals(local_addr) || members.contains(addr)) {
                    PhysicalAddress physical_addr = entry.getValue();
                    sendDiscoveryResponse(
                        addr, physical_addr, UUID.get(addr), msg.getSrc(), isCoord(addr));
                  }
                }
              }
              return null;
            }

            // Only send a response if hdr.mbrs is not empty and contains myself. Otherwise always
            // send my info
            Collection<? extends Address> mbrs = data != null ? data.mbrs() : null;
            boolean send_response = mbrs == null || mbrs.contains(local_addr);
            if (send_response) {
              PhysicalAddress physical_addr =
                  (PhysicalAddress) down(new Event(Event.GET_PHYSICAL_ADDRESS, local_addr));
              sendDiscoveryResponse(
                  local_addr, physical_addr, UUID.get(local_addr), msg.getSrc(), is_coord);
            }
            return null;

          case PingHeader.GET_MBRS_RSP:
            // add physical address (if available) to transport's cache
            if (data != null) {
              log.trace("%s: received GET_MBRS_RSP from %s: %s", local_addr, msg.src(), data);
              handleDiscoveryResponse(data, msg.src());
            }
            return null;

          default:
            log.warn("got PING header with unknown type %d", hdr.type);
            return null;
        }

      case Event.FIND_MBRS:
        return findMembers(
            (List<Address>) evt.getArg(), false, true); // this is done asynchronously
    }

    return up_prot.up(evt);
  }
Exemple #17
0
 /**
  * If the sender is null, set our own address. We cannot just go ahead and set the address anyway,
  * as we might be sending a message on behalf of someone else ! E.g. in case of retransmission,
  * when the original sender has crashed, or in a FLUSH protocol when we have to return all
  * unstable messages with the FLUSH_OK response.
  */
 void setSourceAddress(Message msg) {
   if (msg.getSrc() == null) {
     msg.setSrc(local_addr);
   }
 }
Exemple #18
0
  @SuppressWarnings("unchecked")
  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        GmsHeader hdr = (GmsHeader) msg.getHeader(this.id);
        if (hdr == null) break;
        switch (hdr.type) {
          case GmsHeader.JOIN_REQ:
            view_handler.add(
                new Request(Request.JOIN, hdr.mbr, false, null, hdr.useFlushIfPresent));
            break;
          case GmsHeader.JOIN_REQ_WITH_STATE_TRANSFER:
            view_handler.add(
                new Request(
                    Request.JOIN_WITH_STATE_TRANSFER, hdr.mbr, false, null, hdr.useFlushIfPresent));
            break;
          case GmsHeader.JOIN_RSP:
            impl.handleJoinResponse(hdr.join_rsp);
            break;
          case GmsHeader.LEAVE_REQ:
            if (hdr.mbr == null) return null;
            view_handler.add(new Request(Request.LEAVE, hdr.mbr, false));
            break;
          case GmsHeader.LEAVE_RSP:
            impl.handleLeaveResponse();
            break;
          case GmsHeader.VIEW:
            View new_view = hdr.view;
            if (new_view == null) return null;

            Address coord = msg.getSrc();
            if (!new_view.containsMember(coord)) {
              sendViewAck(
                  coord); // we need to send the ack first, otherwise the connection is removed
              impl.handleViewChange(new_view, hdr.my_digest);
            } else {
              impl.handleViewChange(new_view, hdr.my_digest);
              sendViewAck(coord); // send VIEW_ACK to sender of view
            }
            break;

          case GmsHeader.VIEW_ACK:
            Address sender = msg.getSrc();
            ack_collector.ack(sender);
            return null; // don't pass further up

          case GmsHeader.MERGE_REQ:
            impl.handleMergeRequest(msg.getSrc(), hdr.merge_id, hdr.mbrs);
            break;

          case GmsHeader.MERGE_RSP:
            MergeData merge_data =
                new MergeData(msg.getSrc(), hdr.view, hdr.my_digest, hdr.merge_rejected);
            if (log.isTraceEnabled()) {
              log.trace(
                  local_addr
                      + ": got merge response from "
                      + msg.getSrc()
                      + ", merge_id="
                      + hdr.merge_id
                      + ", merge data is "
                      + merge_data);
            }
            impl.handleMergeResponse(merge_data, hdr.merge_id);
            break;

          case GmsHeader.INSTALL_MERGE_VIEW:
            impl.handleMergeView(
                new MergeData(msg.getSrc(), hdr.view, hdr.my_digest), hdr.merge_id);
            break;

          case GmsHeader.INSTALL_DIGEST:
            Digest tmp = hdr.my_digest;
            down_prot.down(new Event(Event.MERGE_DIGEST, tmp));
            break;

          case GmsHeader.INSTALL_MERGE_VIEW_OK:
            // [JGRP-700] - FLUSH: flushing should span merge
            merge_ack_collector.ack(msg.getSrc());
            break;

          case GmsHeader.CANCEL_MERGE:
            // [JGRP-524] - FLUSH and merge: flush doesn't wrap entire merge process
            impl.handleMergeCancelled(hdr.merge_id);
            break;

          case GmsHeader.GET_DIGEST_REQ:
            // only handle this request if it was sent by the coordinator (or at least a member) of
            // the current cluster
            synchronized (members) {
              if (!members.contains(msg.getSrc())) break;
            }

            // discard my own request:
            if (msg.getSrc().equals(local_addr)) return null;

            if (hdr.merge_id != null
                && !(merger.matchMergeId(hdr.merge_id) || merger.setMergeId(null, hdr.merge_id)))
              return null;

            // fetch only my own digest
            Digest digest = (Digest) down_prot.down(new Event(Event.GET_DIGEST, local_addr));
            if (digest != null) {
              GmsHeader rsp_hdr = new GmsHeader(GmsHeader.GET_DIGEST_RSP);
              rsp_hdr.my_digest = digest;
              Message get_digest_rsp = new Message(msg.getSrc(), null, null);
              get_digest_rsp.setFlag(Message.OOB);
              get_digest_rsp.putHeader(this.id, rsp_hdr);
              down_prot.down(new Event(Event.MSG, get_digest_rsp));
            }
            break;

          case GmsHeader.GET_DIGEST_RSP:
            Digest digest_rsp = hdr.my_digest;
            impl.handleDigestResponse(msg.getSrc(), digest_rsp);
            break;

          default:
            if (log.isErrorEnabled()) log.error("GmsHeader with type=" + hdr.type + " not known");
        }
        return null; // don't pass up

      case Event.SUSPECT:
        Object retval = up_prot.up(evt);
        Address suspected = (Address) evt.getArg();
        view_handler.add(new Request(Request.SUSPECT, suspected, true));
        ack_collector.suspect(suspected);
        merge_ack_collector.suspect(suspected);
        return retval;

      case Event.UNSUSPECT:
        impl.unsuspect((Address) evt.getArg());
        return null; // discard

      case Event.MERGE:
        view_handler.add(
            new Request(Request.MERGE, null, false, (Map<Address, View>) evt.getArg()));
        return null; // don't pass up

      case Event.IS_MERGE_IN_PROGRESS:
        return merger.isMergeInProgress();
    }
    return up_prot.up(evt);
  }
Exemple #19
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  /**
   * 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;
  }
Exemple #20
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  public Object up(Message msg) {
    ExecutorHeader hdr = msg.getHeader(id);
    if (hdr == null) return up_prot.up(msg);

    Request req = msg.getObject();
    if (log.isTraceEnabled()) log.trace("[" + local_addr + "] <-- [" + msg.getSrc() + "] " + req);
    switch (req.type) {
      case RUN_REQUEST:
        handleTaskRequest(req.request, (Address) req.object);
        break;
      case CONSUMER_READY:
        handleConsumerReadyRequest(req.request, (Address) req.object);
        break;
      case CONSUMER_UNREADY:
        handleConsumerUnreadyRequest(req.request, (Address) req.object);
        break;
      case CONSUMER_FOUND:
        handleConsumerFoundResponse(req.request, (Address) req.object);
        break;
      case RUN_SUBMITTED:
        RequestWithThread reqWT = (RequestWithThread) req;
        Object objectToRun = reqWT.object;
        Runnable runnable;
        if (objectToRun instanceof Runnable) {
          runnable = (Runnable) objectToRun;
        } else if (objectToRun instanceof Callable) {
          @SuppressWarnings("unchecked")
          Callable<Object> callable = (Callable<Object>) objectToRun;
          runnable = new FutureTask<>(callable);
        } else {
          log.error(
              Util.getMessage("RequestOfType")
                  + req.type
                  + " sent an object of "
                  + objectToRun
                  + " which is invalid");
          break;
        }

        handleTaskSubmittedRequest(runnable, msg.getSrc(), req.request, reqWT.threadId);
        break;
      case RUN_REJECTED:
        // We could make requests local for this, but is it really worth it
        handleTaskRejectedResponse(msg.getSrc(), req.request);
        break;
      case RESULT_SUCCESS:
        handleValueResponse(msg.getSrc(), req.request, req.object);
        break;
      case RESULT_EXCEPTION:
        handleExceptionResponse(msg.getSrc(), req.request, (Throwable) req.object);
        break;
      case INTERRUPT_RUN:
        // We could make requests local for this, but is it really worth it
        handleInterruptRequest(msg.getSrc(), req.request);
        break;
      case CREATE_CONSUMER_READY:
        Owner owner = new Owner((Address) req.object, req.request);
        handleNewConsumer(owner);
        break;
      case CREATE_RUN_REQUEST:
        owner = new Owner((Address) req.object, req.request);
        handleNewRunRequest(owner);
        break;
      case DELETE_CONSUMER_READY:
        owner = new Owner((Address) req.object, req.request);
        handleRemoveConsumer(owner);
        break;
      case DELETE_RUN_REQUEST:
        owner = new Owner((Address) req.object, req.request);
        handleRemoveRunRequest(owner);
        break;
      default:
        log.error(Util.getMessage("RequestOfType") + req.type + " not known");
        break;
    }
    return null;
  }
Exemple #21
0
  /**
   * An event was received from the layer below. Usually the current layer will want to examine the
   * event type and - depending on its type - perform some computation (e.g. removing headers from a
   * MSG event type, or updating the internal membership list when receiving a VIEW_CHANGE event).
   * Finally the event is either a) discarded, or b) an event is sent down the stack using <code>
   * PassDown</code> or c) the event (or another event) is sent up the stack using <code>PassUp
   * </code>.
   *
   * <p>For the PING protocol, the Up operation does the following things. 1. If the event is a
   * Event.MSG then PING will inspect the message header. If the header is null, PING simply passes
   * up the event If the header is PingHeader.GET_MBRS_REQ then the PING protocol will PassDown a
   * PingRequest message If the header is PingHeader.GET_MBRS_RSP we will add the message to the
   * initial members vector and wake up any waiting threads. 2. If the event is Event.SET_LOCAL_ADDR
   * we will simple set the local address of this protocol 3. For all other messages we simple pass
   * it up to the protocol above
   *
   * @param evt - the event that has been sent from the layer below
   */
  @SuppressWarnings("unchecked")
  public Object up(Event evt) {

    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        PingHeader hdr = (PingHeader) msg.getHeader(this.id);
        if (hdr == null) return up_prot.up(evt);

        PingData data = hdr.data;
        Address logical_addr = data != null ? data.getAddress() : null;

        if (is_leaving) return null; // prevents merging back a leaving member
        // (https://issues.jboss.org/browse/JGRP-1336)

        switch (hdr.type) {
          case PingHeader.GET_MBRS_REQ: // return Rsp(local_addr, coord)
            if (group_addr == null || hdr.cluster_name == null) {
              if (log.isWarnEnabled())
                log.warn(
                    "group_addr ("
                        + group_addr
                        + ") or cluster_name of header ("
                        + hdr.cluster_name
                        + ") is null; passing up discovery request from "
                        + msg.getSrc()
                        + ", but this should not"
                        + " be the case");
            } else {
              if (!group_addr.equals(hdr.cluster_name)) {
                if (log.isWarnEnabled())
                  log.warn(
                      "discarding discovery request for cluster '"
                          + hdr.cluster_name
                          + "' from "
                          + msg.getSrc()
                          + "; our cluster name is '"
                          + group_addr
                          + "'. "
                          + "Please separate your clusters cleanly.");
                return null;
              }
            }

            // add physical address and logical name of the discovery sender (if available) to the
            // cache
            if (data != null) {
              if (logical_addr == null) logical_addr = msg.getSrc();
              Collection<PhysicalAddress> physical_addrs = data.getPhysicalAddrs();
              PhysicalAddress physical_addr =
                  physical_addrs != null && !physical_addrs.isEmpty()
                      ? physical_addrs.iterator().next()
                      : null;
              if (logical_addr != null && physical_addr != null)
                down(
                    new Event(
                        Event.SET_PHYSICAL_ADDRESS,
                        new Tuple<Address, PhysicalAddress>(logical_addr, physical_addr)));
              if (logical_addr != null && data.getLogicalName() != null)
                UUID.add(logical_addr, data.getLogicalName());
              discoveryRequestReceived(msg.getSrc(), data.getLogicalName(), physical_addrs);

              synchronized (ping_responses) {
                for (Responses response : ping_responses) {
                  response.addResponse(data, false);
                }
              }
            }

            if (hdr.view_id != null) {
              // If the discovery request is merge-triggered, and the ViewId shipped with it
              // is the same as ours, we don't respond (JGRP-1315).
              ViewId my_view_id = view != null ? view.getViewId() : null;
              if (my_view_id != null && my_view_id.equals(hdr.view_id)) return null;

              boolean send_discovery_rsp =
                  force_sending_discovery_rsps
                      || is_coord
                      || current_coord == null
                      || current_coord.equals(msg.getSrc());
              if (!send_discovery_rsp) {
                if (log.isTraceEnabled())
                  log.trace(
                      local_addr
                          + ": suppressing merge response as I'm not a coordinator and the "
                          + "discovery request was not sent by a coordinator");
                return null;
              }
            }

            if (isMergeRunning()) {
              if (log.isTraceEnabled())
                log.trace(
                    local_addr + ": suppressing merge response as a merge is already in progress");
              return null;
            }

            List<PhysicalAddress> physical_addrs =
                hdr.view_id != null
                    ? null
                    : Arrays.asList(
                        (PhysicalAddress) down(new Event(Event.GET_PHYSICAL_ADDRESS, local_addr)));
            sendDiscoveryResponse(
                local_addr,
                physical_addrs,
                is_server,
                hdr.view_id != null,
                UUID.get(local_addr),
                msg.getSrc());
            return null;

          case PingHeader.GET_MBRS_RSP: // add response to vector and notify waiting thread
            // add physical address (if available) to transport's cache
            if (data != null) {
              Address response_sender = msg.getSrc();
              if (logical_addr == null) logical_addr = msg.getSrc();
              Collection<PhysicalAddress> addrs = data.getPhysicalAddrs();
              PhysicalAddress physical_addr =
                  addrs != null && !addrs.isEmpty() ? addrs.iterator().next() : null;
              if (logical_addr != null && physical_addr != null)
                down(
                    new Event(
                        Event.SET_PHYSICAL_ADDRESS,
                        new Tuple<Address, PhysicalAddress>(logical_addr, physical_addr)));
              if (logical_addr != null && data.getLogicalName() != null)
                UUID.add(logical_addr, data.getLogicalName());

              if (log.isTraceEnabled())
                log.trace(
                    local_addr + ": received GET_MBRS_RSP from " + response_sender + ": " + data);
              boolean overwrite = logical_addr != null && logical_addr.equals(response_sender);
              synchronized (ping_responses) {
                for (Responses response : ping_responses) {
                  response.addResponse(data, overwrite);
                }
              }
            }
            return null;

          default:
            if (log.isWarnEnabled())
              log.warn("got PING header with unknown type (" + hdr.type + ')');
            return null;
        }

      case Event.GET_PHYSICAL_ADDRESS:
        try {
          sendDiscoveryRequest(group_addr, null, null);
        } catch (InterruptedIOException ie) {
          if (log.isWarnEnabled()) {
            log.warn("Discovery request for cluster " + group_addr + " interrupted");
          }
          Thread.currentThread().interrupt();
        } catch (Exception ex) {
          if (log.isErrorEnabled()) log.error("failed sending discovery request", ex);
        }
        return null;

      case Event.FIND_INITIAL_MBRS: // sent by transport
        return findInitialMembers(null);
    }

    return up_prot.up(evt);
  }