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);
}
}