private boolean checkIfAlreadyReceived(PublishRequest req) { boolean retVal = false; Integer tid = req.getTransactionID(); if (this.alreadyDeliveredRequests.containsKey(tid)) { PublishRequest oldReq = this.alreadyDeliveredRequests.get(tid); if (oldReq.getPublisher().compareTo(req.getPublisher()) == 0 && Arrays.equals(oldReq.getMessage(), req.getMessage())) { retVal = true; } retVal = true; JCsyncAbstractOperation op = JCsyncAbstractOperation.encode(req.getMessage()); JCsyncAbstractOperation op_ = JCsyncAbstractOperation.encode(oldReq.getMessage()); log.warn("request already received: " + req + ", with operation:" + op); log.warn("\toldReq in buffer: " + oldReq + ", with operation:" + op_); } else { retVal = false; log.debug("request added to received requests buffer: " + req); this.alreadyDeliveredRequests.put(new Key(req.getTopicID(), tid), req); // log.trace(retVal); } PublishRequest req_; if (this.alreadyDeliveredRequests.size() > 200) { List<Key> list = new ArrayList<Key>(); list.addAll(this.alreadyDeliveredRequests.keySet()); log.trace( "Clrearing received request buffer, actual size:" + this.alreadyDeliveredRequests.size()); Collections.sort(list); for (int i = 0; i < list.size() - 100; i++) { req_ = this.alreadyDeliveredRequests.remove(list.get(i)); req_ = null; } list = null; System.gc(); } return retVal; }
@Override public void onDeliverRequest(PublishRequest req) { try { // // TODO remove 4 lines below - just for debug // byte[] details = req.getMessage(); // if (req.getEventType() == 1413) { // System.out.println("zzz"); // } JCsyncAbstractOperation op = JCsyncAbstractOperation.encode(req.getMessage()); op.setReqestID(req.getTransactionID()); log.trace( this.pubsubLayer.getNodeInfo().getName() + " (onDeliverRequest) - [publisher]:" + req.getPublisher() + ", [node relay]:" + req.getSourceInfo() + ": " + op); if (this.checkIfAlreadyReceived(req)) { log.trace( this.pubsubLayer.getNodeInfo().getName() + " (onDeliverRequest): - received request that was aready received, skipping ... : " + op); return; } // check that this node can hold this request JCSyncAbstractSharedObject so = this.sharedObjects.get(op.getObjectID()); if (so != null) { if ((op.getOperationType() & OP_REQ_GENERIC) == OP_REQ_GENERIC) { if (op.getOperationType() == OP_REQ_TRANSFER_OBJECT) { // there is no need to inform consistency manager about this kind of request, just send // response and indication sendResponse(req, PubSubConstants.RESP_SUCCESS); synchronized (so.operationIdIncrementLocker) { log.trace( getNodeInfo().getName() + ": transferring shared object with current operation id: " + so.getCurrentOperationID() + ", to node: " + req.getPublisher()); JCsyncAbstractOperation op_ = JCsyncAbstractOperation.get_OP_IND_TRANSFER_OBJECT( op.getObjectID(), so.encode(), req.getPublisher()); op_.setReqestID(op.getReqestID()); sendMessage(req, op_, false); } } else { // if this node is a root if (getAssignedTopic(req.getTopicID()) .isTopicRoot(this.pubsubLayer.getNodeInfo().getID())) { AbstractConsistencyManager acm = getConsistencyManager(req.getTopicID()); if (acm != null) { log.trace( "(onDeliverRequest) - passing operation to consistency model: " + op.toString()); acm.requestReceived(req, op); } else { log.fatal( "(onDeliverRequest) - there is no registered consistency manager for this operation: " + op.toString()); } } else { log.trace( "(onDeliverRequest) - forwarding operation request to the parent node: " + op.toString()); this.pubsubLayer.forwardToParent(req, getAssignedTopic(req.getTopicID())); } } } else { log.fatal("(onDeliverRequest) - unhandled operation type: " + op.toString()); } } else { if (op.getOperationType() == OP_REQ_TRANSFER_OBJECT) { log.trace( getNodeInfo().getName() + ": (onDeliverRequest) - shared object not found!: " + op.toString() + ", forwarding request to the topic owner: " + op.toString()); this.pubsubLayer.forwardToOtherNode( req, this.pubsubLayer.getTopic(op.getObjectID()).getOwner().getNodeInfo()); } else { log.fatal( getNodeInfo().getName() + ": (onDeliverRequest) - shared object not found!: " + op.toString()); sendResponse(req, PubSubConstants.RESP_DOESNOTEXIST); } } } catch (Exception e) { log.error("An error occurred:", e); } }