/// <summary>
/// Relinquish locks held during computation for a short while
/// and reacquire them.
/// </summary>
/// <remarks>
/// Relinquish locks held during computation for a short while
/// and reacquire them. This will give other threads a chance
/// to acquire the contended locks and run.
/// </remarks>
/// <returns>true if locks were released and reacquired.</returns>
public virtual bool Yield()
{
// Are we set up to do this?
if (limitPerRun <= 0 || dir == null || fsn == null)
{
return(false);
}
// Have we reached the limit?
long currentCount = counts.GetFileCount() + counts.GetSymlinkCount() + counts.GetDirectoryCount
() + counts.GetSnapshotableDirectoryCount();
if (currentCount <= nextCountLimit)
{
return(false);
}
// Update the next limit
nextCountLimit = currentCount + limitPerRun;
bool hadDirReadLock = dir.HasReadLock();
bool hadDirWriteLock = dir.HasWriteLock();
bool hadFsnReadLock = fsn.HasReadLock();
bool hadFsnWriteLock = fsn.HasWriteLock();
// sanity check.
if (!hadDirReadLock || !hadFsnReadLock || hadDirWriteLock || hadFsnWriteLock || dir
.GetReadHoldCount() != 1 || fsn.GetReadHoldCount() != 1)
{
// cannot relinquish
return(false);
}
// unlock
dir.ReadUnlock();
fsn.ReadUnlock();
try
{
Sharpen.Thread.Sleep(sleepMilliSec, sleepNanoSec);
}
catch (Exception)
{
}
finally
{
// reacquire
fsn.ReadLock();
dir.ReadLock();
}
yieldCount++;
return(true);
}
/// <summary>
/// Compute
/// <see cref="Org.Apache.Hadoop.FS.ContentSummary"/>
/// .
/// </summary>
public ContentSummary ComputeAndConvertContentSummary(ContentSummaryComputationContext
summary)
{
ContentCounts counts = ComputeContentSummary(summary).GetCounts();
QuotaCounts q = GetQuotaCounts();
return(new ContentSummary.Builder().Length(counts.GetLength()).FileCount(counts.GetFileCount
() + counts.GetSymlinkCount()).DirectoryCount(counts.GetDirectoryCount()).Quota(
q.GetNameSpace()).SpaceConsumed(counts.GetStoragespace()).SpaceQuota(q.GetStorageSpace
()).TypeConsumed(counts.GetTypeSpaces()).TypeQuota(q.GetTypeSpaces().AsArray()).
Build());
}