public object Clone()
{
HashMapBucket hmBucket = new HashMapBucket(_permanentAddress, _bucketId);
hmBucket.TempAddress = _tempAddress;
hmBucket.Status = Status;
return(hmBucket);
}
public override bool Equals(object obj)
{
HashMapBucket bucket = obj as HashMapBucket;
if (bucket != null)
{
return(this.BucketId == bucket.BucketId);
}
return(false);
}
/// <summary>
/// A new map is required when a member leaves or joins the cluster.
/// This method returns a new map based on the input paramameters.
/// </summary>
/// <param name="member">Address of the member that has either left
/// or joined the cluster</param>
/// <param name="isNew">A flag. True if the member has joined otherwise false.</param>
/// <returns>A new hashmap instance</returns>
public virtual DistributionMaps GetMaps(DistributionInfoData distInfoData)
{
ArrayList tmpMap = null;
Hashtable bucketsOwnershipMap = null;
ArrayList partitionNodes = new ArrayList();
_sync.AcquireWriterLock(Timeout.Infinite);
try
{
if (_installedHashMap == null)
{
tmpMap = new ArrayList(TotalBuckets);
for (int i = 0; i < TotalBuckets; i++)
{
HashMapBucket bucket = new HashMapBucket(distInfoData.AffectedNode.NodeAddress, i, BucketStatus.Functional);
tmpMap.Add(bucket);
}
_existingMembers.Add(distInfoData.AffectedNode.NodeAddress);
_lastCreatedHashMap = tmpMap.Clone() as ArrayList;
bucketsOwnershipMap = GetBucketsOwnershipMap(_lastCreatedHashMap);
return new DistributionMaps(_lastCreatedHashMap, bucketsOwnershipMap);
}
else if (_lastCreatedHashMap == null)
{
_lastCreatedHashMap = _installedHashMap.Clone() as ArrayList;
}
switch (distInfoData.ClustActivity)
{
case ClusterActivity.NodeJoin:
try
{
return GetMapsOnNodeJoining(distInfoData);
}
catch (Exception e)
{
if (NCacheLog.IsErrorEnabled) NCacheLog.Error("DistributionMgr.GetMaps()", e.ToString());
break;
}
case ClusterActivity.NodeLeave:
try
{
return GetMapsOnNodeLeaving(distInfoData);
}
catch (Exception e)
{
if (NCacheLog.IsErrorEnabled) NCacheLog.Error("DistributionMgr.GetMaps()", e.ToString());
break;
}
case ClusterActivity.None:
BalanceNodeMgr bnMgr = new BalanceNodeMgr(null);
DistributionMaps result = bnMgr.BalanceNodes(distInfoData, _lastCreatedHashMap, _bucketsStats, _existingMembers);
if (result.Hashmap != null)
{
_lastCreatedHashMap = result.Hashmap.Clone() as ArrayList;
result.BucketsOwnershipMap = GetBucketsOwnershipMap(_lastCreatedHashMap);
}
return result;
default:
break;
}
}
finally
{
_sync.ReleaseWriterLock();
}
return null;
}
public object Clone()
{
HashMapBucket hmBucket = new HashMapBucket(_permanentAddress, _bucketId);
hmBucket.TempAddress = _tempAddress;
hmBucket.Status = Status;
return hmBucket;
}
/// <summary>
/// Updates the state transfer task in synchronus way. It adds/remove buckets
/// to be transferred by the state transfer task.
/// </summary>
/// <param name="myBuckets"></param>
public bool UpdateStateTransfer(ArrayList myBuckets, int updateId)
{
if (_parent.HasDisposed)
return false;
StringBuilder sb = new StringBuilder();
lock (_updateIdMutex)
{
if (updateId != updateCount)
{
if (_parent.NCacheLog.IsErrorEnabled) _parent.Context.NCacheLog.CriticalInfo(this.Name + "UpdateStateTxfr", " Do not need to update the task as update id does not match; provided id :" + updateId + " currentId :" + updateCount);
return false;
}
}
lock (_stateTxfrMutex)
{
try
{
if (myBuckets != null)
{
if (_parent.Context.NCacheLog.IsInfoEnabled) _parent.Context.NCacheLog.Info(Name + ".UpdateStateTxfr", " my buckets " + myBuckets.Count);
//we work on the copy of the map.
ArrayList buckets = myBuckets.Clone() as ArrayList;
ArrayList leavingNodes = new ArrayList();
if (_sparsedBuckets != null && _sparsedBuckets.Count > 0)
{
IEnumerator e = _sparsedBuckets.GetEnumerator();
lock (_sparsedBuckets.SyncRoot)
{
while (e.MoveNext())
{
BucketsPack bPack = (BucketsPack)e.Current;
ArrayList bucketIds = bPack.BucketIds.Clone() as ArrayList;
foreach (int bucketId in bucketIds)
{
HashMapBucket current = new HashMapBucket(null, bucketId);
if (!buckets.Contains(current))
{
((BucketsPack)e.Current).BucketIds.Remove(bucketId);
}
else
{
HashMapBucket bucket = buckets[buckets.IndexOf(current)] as HashMapBucket;
if (!bPack.Owner.Equals(bucket.PermanentAddress))
{
//either i have become owner of the bucket or
//some one else for e.g a replica node
if (_parent.Context.NCacheLog.IsInfoEnabled) _parent.Context.NCacheLog.Info(Name + ".UpdateStateTxfer", bucket.BucketId + "bucket owner changed old :" + bPack.Owner + " new :" + bucket.PermanentAddress);
bPack.BucketIds.Remove(bucketId);
}
}
}
if (bPack.BucketIds.Count == 0)
{
//This owner has left.
leavingNodes.Add(bPack.Owner);
}
}
foreach (Address leavigNode in leavingNodes)
{
BucketsPack bPack = new BucketsPack(null, leavigNode);
_sparsedBuckets.Remove(bPack);
}
leavingNodes.Clear();
}
}
if (_filledBuckets != null && _filledBuckets.Count > 0)
{
IEnumerator e = _filledBuckets.GetEnumerator();
lock (_filledBuckets.SyncRoot)
{
while (e.MoveNext())
{
BucketsPack bPack = (BucketsPack)e.Current;
ArrayList bucketIds = bPack.BucketIds.Clone() as ArrayList;
foreach (int bucketId in bucketIds)
{
HashMapBucket current = new HashMapBucket(null, bucketId);
if (!buckets.Contains(current))
{
((BucketsPack)e.Current).BucketIds.Remove(bucketId);
}
else
{
HashMapBucket bucket = buckets[buckets.IndexOf(current)] as HashMapBucket;
if (!bPack.Owner.Equals(bucket.PermanentAddress))
{
//either i have become owner of the bucket or
//some one else for e.g a replica node
bPack.BucketIds.Remove(bucketId);
}
}
}
if (bPack.BucketIds.Count == 0)
{
//This owner has left.
leavingNodes.Add(bPack.Owner);
}
}
foreach (Address leavigNode in leavingNodes)
{
BucketsPack bPack = new BucketsPack(null, leavigNode);
_filledBuckets.Remove(bPack);
}
leavingNodes.Clear();
}
}
//Now we add those buckets which we have to be state transferred
//and are not currently in our list
IEnumerator ie = buckets.GetEnumerator();
while (ie.MoveNext())
{
HashMapBucket bucket = ie.Current as HashMapBucket;
if (_localAddress.Equals(bucket.TempAddress) && !_localAddress.Equals(bucket.PermanentAddress))
{
BucketsPack bPack = new BucketsPack(null, bucket.PermanentAddress);
if (IsSparsedBucket(bucket.BucketId, bucket.PermanentAddress))
{
int index = _sparsedBuckets.IndexOf(bPack);
if (index != -1)
{
bPack = _sparsedBuckets[index] as BucketsPack;
}
else
_sparsedBuckets.Add(bPack);
if (!bPack.BucketIds.Contains(bucket.BucketId))
{
bPack.BucketIds.Add(bucket.BucketId);
}
}
else
{
int index = _filledBuckets.IndexOf(bPack);
if (index != -1)
{
bPack = _filledBuckets[index] as BucketsPack;
}
else
{
_filledBuckets.Add(bPack);
}
if (!bPack.BucketIds.Contains(bucket.BucketId))
{
bPack.BucketIds.Add(bucket.BucketId);
}
}
}
}
}
}
catch (NullReferenceException ex)
{
_parent.Context.NCacheLog.Error(Name + ".UpdateStateTxfr", ex.ToString());
}
catch (Exception e)
{
_parent.Context.NCacheLog.Error(Name + ".UpdateStateTxfr", e.ToString());
}
finally
{
if (_parent.Context.NCacheLog.IsInfoEnabled) _parent.Context.NCacheLog.Info(Name + ".UpdateStateTxfr", " Pulsing waiting thread");
System.Threading.Monitor.PulseAll(_stateTxfrMutex);
}
}
return true;
}
