/// <summary>List all cache pools.</summary>
/// <returns>
/// A remote iterator from which you can get CachePoolEntry objects.
/// Requests will be made as needed.
/// </returns>
/// <exception cref="System.IO.IOException">If there was an error listing cache pools.
/// </exception>
public virtual RemoteIterator <CachePoolEntry> ListCachePools()
{
return(dfs.ListCachePools());
}
/// <exception cref="System.IO.IOException"/>
public virtual int Run(Configuration conf, IList <string> args)
{
string name = StringUtils.PopFirstNonOption(args);
bool printStats = StringUtils.PopOption("-stats", args);
if (!args.IsEmpty())
{
System.Console.Error.Write("Can't understand arguments: " + Joiner.On(" ").Join(args
) + "\n");
System.Console.Error.WriteLine("Usage is " + GetShortUsage());
return(1);
}
DistributedFileSystem dfs = AdminHelper.GetDFS(conf);
TableListing.Builder builder = new TableListing.Builder().AddField("NAME", TableListing.Justification
.Left).AddField("OWNER", TableListing.Justification.Left).AddField("GROUP", TableListing.Justification
.Left).AddField("MODE", TableListing.Justification.Left).AddField("LIMIT", TableListing.Justification
.Right).AddField("MAXTTL", TableListing.Justification.Right);
if (printStats)
{
builder.AddField("BYTES_NEEDED", TableListing.Justification.Right).AddField("BYTES_CACHED"
, TableListing.Justification.Right).AddField("BYTES_OVERLIMIT", TableListing.Justification
.Right).AddField("FILES_NEEDED", TableListing.Justification.Right).AddField("FILES_CACHED"
, TableListing.Justification.Right);
}
TableListing listing = builder.Build();
int numResults = 0;
try
{
RemoteIterator <CachePoolEntry> iter = dfs.ListCachePools();
while (iter.HasNext())
{
CachePoolEntry entry = iter.Next();
CachePoolInfo info = entry.GetInfo();
List <string> row = new List <string>();
if (name == null || info.GetPoolName().Equals(name))
{
row.AddItem(info.GetPoolName());
row.AddItem(info.GetOwnerName());
row.AddItem(info.GetGroupName());
row.AddItem(info.GetMode() != null ? info.GetMode().ToString() : null);
long limit = info.GetLimit();
string limitString;
if (limit != null && limit.Equals(CachePoolInfo.LimitUnlimited))
{
limitString = "unlimited";
}
else
{
limitString = string.Empty + limit;
}
row.AddItem(limitString);
long maxTtl = info.GetMaxRelativeExpiryMs();
string maxTtlString = null;
if (maxTtl != null)
{
if (maxTtl == CachePoolInfo.RelativeExpiryNever)
{
maxTtlString = "never";
}
else
{
maxTtlString = DFSUtil.DurationToString(maxTtl);
}
}
row.AddItem(maxTtlString);
if (printStats)
{
CachePoolStats stats = entry.GetStats();
row.AddItem(System.Convert.ToString(stats.GetBytesNeeded()));
row.AddItem(System.Convert.ToString(stats.GetBytesCached()));
row.AddItem(System.Convert.ToString(stats.GetBytesOverlimit()));
row.AddItem(System.Convert.ToString(stats.GetFilesNeeded()));
row.AddItem(System.Convert.ToString(stats.GetFilesCached()));
}
listing.AddRow(Sharpen.Collections.ToArray(row, new string[row.Count]));
++numResults;
if (name != null)
{
break;
}
}
}
}
catch (IOException e)
{
System.Console.Error.WriteLine(AdminHelper.PrettifyException(e));
return(2);
}
System.Console.Out.Write(string.Format("Found %d result%s.%n", numResults, (numResults
== 1 ? string.Empty : "s")));
if (numResults > 0)
{
System.Console.Out.Write(listing);
}
// If list pools succeed, we return 0 (success exit code)
return(0);
}