/// <summary>Return true if this CachedBlock is present on the given list.</summary>
public bool IsPresent(DatanodeDescriptor.CachedBlocksList cachedBlocksList)
{
for (int i = 0; i < triplets.Length; i += 3)
{
DatanodeDescriptor.CachedBlocksList list = (DatanodeDescriptor.CachedBlocksList)triplets
[i];
if (list == cachedBlocksList)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Get a list of the datanodes which this block is cached,
/// planned to be cached, or planned to be uncached on.
/// </summary>
/// <param name="type">
/// If null, this parameter is ignored.
/// If it is non-null, we match only datanodes which
/// have it on this list.
/// See
/// <see cref="Org.Apache.Hadoop.Hdfs.Server.Blockmanagement.DatanodeDescriptor.CachedBlocksList.Type
/// "/>
/// for a description of all the lists.
/// </param>
/// <returns>
/// The list of datanodes. Modifying this list does not
/// alter the state of the CachedBlock.
/// </returns>
public IList <DatanodeDescriptor> GetDatanodes(DatanodeDescriptor.CachedBlocksList.Type
type)
{
IList <DatanodeDescriptor> nodes = new List <DatanodeDescriptor>();
for (int i = 0; i < triplets.Length; i += 3)
{
DatanodeDescriptor.CachedBlocksList list = (DatanodeDescriptor.CachedBlocksList)triplets
[i];
if ((type == null) || (list.GetType() == type))
{
nodes.AddItem(list.GetDatanode());
}
}
return(nodes);
}
