TGridClientNodePtr GridClientPartitionAffinity::findNode(const GridUuid& id, const TNodesSet& nodes) const {
TNodesSet::const_iterator iter = find_if(nodes.begin(), nodes.end(), [&id] (const GridClientNode& node) {
return node.getNodeId() == id;
});
assert(iter != nodes.end());
return TGridClientNodePtr(new GridClientNode(*iter));
}
TGridClientNodePtr GridClientPartitionAffinity::getNode(const TNodesSet& nodes, const GridHasheableObject& key) {
set<GridUuid> newNodes;
for (auto iter = nodes.begin(); iter != nodes.end(); ++iter)
newNodes.insert(iter->getNodeId());
GridUuid nodeId;
{
boost::lock_guard<boost::mutex> lock(mux);
if (addedNodes != newNodes) {
// Recreate the consistent hash ring.
addedNodes.clear();
nodeHash.clear();
for (auto iter = nodes.begin(); iter != nodes.end(); ++iter) {
GridClientNode n = *iter;
add(n, getReplicas(n));
}
}
int32_t part = abs(key.hashCode() % parts);
std::set<NodeInfo> nInfos;
for (TNodesSet::const_iterator i = nodes.begin(); i != nodes.end(); i++)
nInfos.insert(NodeInfo(i->getNodeId(),
std::shared_ptr<GridHasheableObject>(new GridClientVariantHasheableObject(hashIdResolver(*i)))));
nodeId = nodeHash.node(GridInt32Hasheable(part), nInfos).id();
}
return findNode(nodeId, nodes);
}
TGridClientNodeList GridClientComputeProjectionImpl::nodes(std::function<bool(const GridClientNode&)> filter) const {
TGridClientNodeList nodes;
TNodesSet ns;
subProjectionNodes(ns);
for (auto it = ns.begin(); it != ns.end(); ++it) {
GridClientNode* gcn = new GridClientNode(*it);
TGridClientNodePtr p = TGridClientNodePtr(gcn);
if (filter(*p))
nodes.push_back(p);
}
return nodes;
}
/**
* Gets nodes that passes the filter. If this compute instance is a projection, then only
* nodes that passes projection criteria will be passed to the filter.
*
* @param filter Node filter.
* @return Collection of nodes that satisfy provided filter.
*/
TGridClientNodeList GridClientComputeProjectionImpl::nodes(const std::vector<GridUuid>& ids) const {
TGridClientNodeList nodes;
std::set<GridUuid> nodeIds(ids.begin(), ids.end());
TNodesSet ns;
subProjectionNodes(ns);
for (auto it = ns.begin(); it != ns.end(); ++it) {
if (nodeIds.find(it->getNodeId()) == nodeIds.end())
continue;
nodes.push_back(TGridClientNodePtr(new GridClientNode(*it)));
}
return nodes;
}
void GridClientImpl::fireTopologyEvents(const TNodesSet& updNodes, const TNodesSet& prevNodes) {
ClientNodeComparator nodeComp;
TNodesSet newNodes;
// Calculate new nodes.
std::set_difference(updNodes.begin(), updNodes.end(), prevNodes.begin(), prevNodes.end(),
std::inserter(newNodes, newNodes.begin()), nodeComp);
// File onNodeAdded() events.
for (auto i = newNodes.begin(); i != newNodes.end(); i++)
fireNodeAdded(*i);
TNodesSet leftNodes;
// Calculate left nodes.
std::set_difference(prevNodes.begin(), prevNodes.end(), updNodes.begin(), updNodes.end(),
std::inserter(leftNodes, leftNodes.begin()), nodeComp);
// Fire onNodeRemoved() events.
for (auto i = leftNodes.begin(); i != leftNodes.end(); i++)
fireNodeRemoved(*i);
}