public INode GetNode(ulong nodeId, BrightstarProfiler profiler)
{
using (profiler.Step("BPlusTree.GetNode"))
{
INode ret;
if (_modifiedNodes.TryGetValue(nodeId, out ret))
{
profiler.Incr("NodeCache Hit");
return(ret);
}
if (_nodeCache.TryGetValue(nodeId, out ret))
{
profiler.Incr("NodeCache Hit");
return(ret);
}
profiler.Incr("NodeCache Miss");
using (profiler.Step("Load Node"))
{
var nodePage = _pageStore.Retrieve(nodeId, profiler);
var header = BitConverter.ToInt32(nodePage, 0);
if (header < 0)
{
ret = new InternalNode(nodeId, nodePage, ~header, _config);
}
else
{
ret = new LeafNode(nodeId, nodePage, header, _config);
}
_nodeCache.Add(ret);
return(ret);
}
}
}
public INode GetNode(ulong nodeId, BrightstarProfiler profiler)
{
using (profiler.Step("BPlusTree.GetNode"))
{
INode ret;
if (_nodeCache.TryGetValue(nodeId, out ret))
{
profiler.Incr("NodeCache Hit");
return(ret);
}
profiler.Incr("NodeCache Miss");
using (profiler.Step("Load Node"))
{
var nodePage = _pageStore.Retrieve(nodeId, profiler);
var header = BitConverter.ToInt32(nodePage.Data, 0);
if (header < 0)
{
ret = MakeInternalNode(nodePage, ~header);
#if DEBUG_BTREE
_config.BTreeDebug("{0}: Loaded INTERNAL node from page {1}. {2}", _config.DebugId, nodePage.Id, ret.ToString());
#endif
}
else
{
ret = MakeLeafNode(nodePage, header);
#if DEBUG_BTREE
_config.BTreeDebug("{0}: Loaded LEAF node from page {1}. {2}", _config.DebugId, nodePage.Id, ret.ToString());
#endif
}
_nodeCache.Add(ret);
return(ret);
}
}
}