/// <summary>
/// Verifies whether a given node is the permanent owner of the bucket or not
/// </summary>
/// <param name="bucketId"></param>
/// <param name="perOwner"></param>
/// <returns></returns>
public bool VerifyPermanentOwnership(int bucketId, Address perOwner)
{
try
{
if (perOwner != null)
{
Sync.AcquireReaderLock(Timeout.Infinite);
try
{
lock (InstalledHashMap.SyncRoot)
{
HashMapBucket bucket = (HashMapBucket)InstalledHashMap[bucketId];
return(perOwner.Equals(bucket.TempAddress));
}
}
finally
{
Sync.ReleaseReaderLock();
}
}
}
catch (Exception e)
{
NCacheLog.Error("DistributionMgr.VerifyPermanentOwnership", e.ToString());
}
return(false);
}
public bool IsBucketFunctional(Address owner, object key)
{
int bucketId = GetBucketId(key as string);
Sync.AcquireReaderLock(Timeout.Infinite);
try
{
if (BucketsOwnershipMap != null && BucketsOwnershipMap.Contains(owner))
{
ArrayList buckets = BucketsOwnershipMap[owner] as ArrayList;
if (buckets != null)
{
int index = buckets.IndexOf(new HashMapBucket(null, bucketId));
if (index != -1)
{
HashMapBucket bucket = buckets[index] as HashMapBucket;
if (bucket.Status == BucketStatus.Functional)
{
return(true);
}
}
}
}
}
finally
{
Sync.ReleaseReaderLock();
}
return(false);
}
public override int GetItemSize(object key)
{
Sync.AcquireReaderLock(Timeout.Infinite);
try
{
return(_storage.GetItemSize(key));
}
finally
{
Sync.ReleaseReaderLock();
}
}
/// <summary>
/// Determines whether the store contains a specific key.
/// </summary>
/// <param name="key">The key to locate in the store.</param>
/// <returns>true if the store contains an element
/// with the specified key; otherwise, false.</returns>
public override bool Contains(object key)
{
Sync.AcquireReaderLock(Timeout.Infinite);
try
{
return(_storage.Contains(key));
}
finally
{
Sync.ReleaseReaderLock();
}
}
public override Hashtable GetBucketsOwnershipMap(ArrayList hashMap)
{
Hashtable bucketsOwnerShipMap = new Hashtable();
try
{
Sync.AcquireReaderLock(Timeout.Infinite);
Hashtable coordinatorNodesOwnershipMap = base.GetBucketsOwnershipMap(hashMap);
Hashtable currentOwnershipMap = _bucketsOwnershipMap != null?_bucketsOwnershipMap.Clone() as Hashtable : null;
ArrayList replicas = null;
Address partitionCoordinator = null;
if (coordinatorNodesOwnershipMap != null)
{
IDictionaryEnumerator ide = coordinatorNodesOwnershipMap.GetEnumerator();
while (ide.MoveNext())
{
partitionCoordinator = ide.Key as Address;
ArrayList coordinatorBuckets = ide.Value as ArrayList;
string subgroup = _subGroupMap[partitionCoordinator] as string;
if (subgroup != null)
{
replicas = _partitionNodesInfo[subgroup] as ArrayList;
if (replicas != null)
{
foreach (PartNodeInfo node in replicas)
{
if (node.IsCoordinator)
{
bucketsOwnerShipMap.Add(node.NodeAddress, coordinatorBuckets);
if (NCacheLog.IsInfoEnabled)
{
NCacheLog.Info("PoRDistMgr.GetBucketsOwnerShipMap", subgroup + ": " + node.NodeAddress.ToString() + " has got " + coordinatorBuckets.Count + " buckets");
}
}
else
{
ArrayList currentBuckets = currentOwnershipMap != null ? currentOwnershipMap[node.NodeAddress] as ArrayList : null;
ArrayList updatedBucketsList = new ArrayList();
if (currentBuckets != null)
{
//Node was already in the partitioned.
foreach (HashMapBucket bucket in currentBuckets)
{
//if bucket is not transferred to the replica yet then we
//change the temp address to make sure that if the coordinator
//of the partitioned is changed, it is reflected in the map.
if (coordinatorBuckets.Contains(bucket))
{
if (bucket.TempAddress != null && !bucket.PermanentAddress.Equals(bucket.TempAddress))
{
bucket.PermanentAddress = partitionCoordinator;
}
if (NCacheLog.IsInfoEnabled)
{
NCacheLog.Info("PoRDistMgr.GetBucketsOwnerShipMap", bucket.ToString() + " after coordinator left");
}
updatedBucketsList.Add(bucket.Clone());
}
}
//during loadbalancing; some new buckets may be assigned to a replica coordinator.
foreach (HashMapBucket coodinatorBucket in coordinatorBuckets)
{
if (!currentBuckets.Contains(coodinatorBucket))
{
HashMapBucket newNodeBucket = coodinatorBucket.Clone() as HashMapBucket;
newNodeBucket.PermanentAddress = partitionCoordinator;
newNodeBucket.TempAddress = node.NodeAddress;
//replica node need to state transfer from his coordinator.
newNodeBucket.Status = BucketStatus.NeedTransfer;
updatedBucketsList.Add(newNodeBucket);
if (NCacheLog.IsInfoEnabled)
{
NCacheLog.Info("PoRDistMgr.GetBucketsOwnerShipMap", newNodeBucket.ToString() + " new bucket assigned to replica");
}
}
}
}
else
{
//it is a new replica node,so we create a new bucket list for this node
foreach (HashMapBucket coodinatorBucket in coordinatorBuckets)
{
HashMapBucket newNodeBucket = coodinatorBucket.Clone() as HashMapBucket;
newNodeBucket.PermanentAddress = partitionCoordinator;
newNodeBucket.TempAddress = node.NodeAddress;
//replica node need to state transfer from his coordinator.
newNodeBucket.Status = BucketStatus.NeedTransfer;
updatedBucketsList.Add(newNodeBucket);
if (NCacheLog.IsInfoEnabled)
{
NCacheLog.Info("PoRDistMgr.GetBucketsOwnerShipMap", newNodeBucket.ToString() + " fresh replica");
}
}
}
if (NCacheLog.IsInfoEnabled)
{
NCacheLog.Info("PoRDistMgr.GetBucketsOwnerShipMap", subgroup + ": " + node.NodeAddress.ToString() + " has got " + updatedBucketsList.Count + " buckets");
}
bucketsOwnerShipMap.Add(node.NodeAddress, updatedBucketsList);
}
}
}
}
}
}
}
catch (Exception e)
{
NCacheLog.Error("PoRDistMgr.GetBucketsOwnerShipMap", e.ToString());
}
finally
{
Sync.ReleaseReaderLock();
}
return(bucketsOwnerShipMap);
}
