/**
* FUNCTION NAME: updateRing
*
* DESCRIPTION: This function does the following:
* 1) Gets the current membership list from the Membership Protocol (MP1Node)
* The membership list is returned as a vector of Nodes. See Node class in Nodne.h
* 2) Constructs the ring based on the membership list
* 3) Calls the Stabilization Protocol
*/
void MP2Node::updateRing() {
/*
* Implement this. Parts of it are already implemented
*/
vector<Node> curMemList;
bool change = false;
/*
* Step 1. Get the current membership list from Membership Protocol / MP1
*/
curMemList = getMembershipList();
/*
* Step 2: Construct the ring
*/
// Sort the list based on the hashCode
sort(curMemList.begin(), curMemList.end());
//else ring remians the same
if (!equalRing(curMemList, ring)) {
change = true;
ring = curMemList;
//hasMyReplicas = findNodes();
}
/*
* Step 3: Run the stabilization protocol IF REQUIRED
*/
// Run stabilization protocol if the hash table size is greater than zero and if there has been a changed in the ring
if ((!ht->isEmpty()) && change)
stabilizationProtocol();
}
/**
* FUNCTION NAME: updateRing
*
* DESCRIPTION: This function does the following:
* 1) Gets the current membership list from the Membership Protocol (MP1Node)
* The membership list is returned as a vector of Nodes. See Node class in Node.h
* 2) Constructs the ring based on the membership list
* 3) Calls the Stabilization Protocol
*/
void MP2Node::updateRing() {
/*
* Implement this. Parts of it are already implemented
*/
vector<Node> curMemList;
bool change = false;
/*
* Step 1. Get the current membership list from Membership Protocol / MP1
*/
curMemList = getMembershipList();
/*
* Step 2: Construct the ring
*/
// Sort the list based on the hashCode
sort(curMemList.begin(), curMemList.end());
//check if stablization required or not by checking the change in ring
change = isRingSame(curMemList);
//If the ring has changed or it was empty before assign ring the new Member List
if (ring.empty() || change)
ring = curMemList;
//Initially when hasMyReplicas and haveReplicasOf is empty initialize those variables for this node
if (hasMyReplicas.empty() || haveReplicasOf.empty())
assignReplicationNodes();
/*
* Step 3: Run the stabilization protocol IF REQUIRED
*/
//Run stabilization protocol if the hash table size is greater than zero and if there has been a changed in the ring
cout << "Stablization required = " << change << endl;
// If stablization is required run stablization protocol.
if (change && !ht->isEmpty())
stabilizationProtocol();
}
