/// <summary>Iterate through all items and detect timed-out items</summary>
internal virtual void PendingReplicationCheck()
{
lock (this._enclosing.pendingReplications)
{
IEnumerator <KeyValuePair <Block, PendingReplicationBlocks.PendingBlockInfo> > iter =
this._enclosing.pendingReplications.GetEnumerator();
long now = Time.MonotonicNow();
if (PendingReplicationBlocks.Log.IsDebugEnabled())
{
PendingReplicationBlocks.Log.Debug("PendingReplicationMonitor checking Q");
}
while (iter.HasNext())
{
KeyValuePair <Block, PendingReplicationBlocks.PendingBlockInfo> entry = iter.Next(
);
PendingReplicationBlocks.PendingBlockInfo pendingBlock = entry.Value;
if (now > pendingBlock.GetTimeStamp() + this._enclosing.timeout)
{
Block block = entry.Key;
lock (this._enclosing.timedOutItems)
{
this._enclosing.timedOutItems.AddItem(block);
}
PendingReplicationBlocks.Log.Warn("PendingReplicationMonitor timed out " + block);
iter.Remove();
}
}
}
}
/// <summary>How many copies of this block is pending replication?</summary>
internal virtual int GetNumReplicas(Block block)
{
lock (pendingReplications)
{
PendingReplicationBlocks.PendingBlockInfo found = pendingReplications[block];
if (found != null)
{
return(found.GetNumReplicas());
}
}
return(0);
}
/// <summary>Add a block to the list of pending Replications</summary>
/// <param name="block">The corresponding block</param>
/// <param name="targets">The DataNodes where replicas of the block should be placed</param>
internal virtual void Increment(Block block, DatanodeDescriptor[] targets)
{
lock (pendingReplications)
{
PendingReplicationBlocks.PendingBlockInfo found = pendingReplications[block];
if (found == null)
{
pendingReplications[block] = new PendingReplicationBlocks.PendingBlockInfo(targets
);
}
else
{
found.IncrementReplicas(targets);
found.SetTimeStamp();
}
}
}
/// <summary>Iterate through all items and print them.</summary>
internal virtual void MetaSave(PrintWriter @out)
{
lock (pendingReplications)
{
@out.WriteLine("Metasave: Blocks being replicated: " + pendingReplications.Count);
IEnumerator <KeyValuePair <Block, PendingReplicationBlocks.PendingBlockInfo> > iter =
pendingReplications.GetEnumerator();
while (iter.HasNext())
{
KeyValuePair <Block, PendingReplicationBlocks.PendingBlockInfo> entry = iter.Next(
);
PendingReplicationBlocks.PendingBlockInfo pendingBlock = entry.Value;
Block block = entry.Key;
@out.WriteLine(block + " StartTime: " + Sharpen.Extensions.CreateDate(pendingBlock
.timeStamp) + " NumReplicaInProgress: " + pendingBlock.GetNumReplicas());
}
}
}
/// <summary>One replication request for this block has finished.</summary>
/// <remarks>
/// One replication request for this block has finished.
/// Decrement the number of pending replication requests
/// for this block.
/// </remarks>
/// <param name="The">DataNode that finishes the replication</param>
internal virtual void Decrement(Block block, DatanodeDescriptor dn)
{
lock (pendingReplications)
{
PendingReplicationBlocks.PendingBlockInfo found = pendingReplications[block];
if (found != null)
{
if (Log.IsDebugEnabled())
{
Log.Debug("Removing pending replication for " + block);
}
found.DecrementReplicas(dn);
if (found.GetNumReplicas() <= 0)
{
Sharpen.Collections.Remove(pendingReplications, block);
}
}
}
}
