/// <summary>Modify a CacheDirective.</summary>
/// <param name="info">
/// Information about the directive to modify. You must set the ID
/// to indicate which CacheDirective you want to modify.
/// </param>
/// <param name="flags">
///
/// <see cref="Org.Apache.Hadoop.FS.CacheFlag"/>
/// s to use for this operation.
/// </param>
/// <exception cref="System.IO.IOException">if the directive could not be modified</exception>
public virtual void ModifyCacheDirective(CacheDirectiveInfo info, EnumSet <CacheFlag
> flags)
{
dfs.ModifyCacheDirective(info, flags);
}
/// <exception cref="System.IO.IOException"/>
public virtual int Run(Configuration conf, IList <string> args)
{
CacheDirectiveInfo.Builder builder = new CacheDirectiveInfo.Builder();
bool modified = false;
string idString = StringUtils.PopOptionWithArgument("-id", args);
if (idString == null)
{
System.Console.Error.WriteLine("You must specify a directive ID with -id.");
return(1);
}
builder.SetId(long.Parse(idString));
string path = StringUtils.PopOptionWithArgument("-path", args);
if (path != null)
{
builder.SetPath(new Path(path));
modified = true;
}
bool force = StringUtils.PopOption("-force", args);
string replicationString = StringUtils.PopOptionWithArgument("-replication", args
);
if (replicationString != null)
{
builder.SetReplication(short.ParseShort(replicationString));
modified = true;
}
string poolName = StringUtils.PopOptionWithArgument("-pool", args);
if (poolName != null)
{
builder.SetPool(poolName);
modified = true;
}
string ttlString = StringUtils.PopOptionWithArgument("-ttl", args);
try
{
CacheDirectiveInfo.Expiration ex = ParseExpirationString(ttlString);
if (ex != null)
{
builder.SetExpiration(ex);
modified = true;
}
}
catch (IOException e)
{
System.Console.Error.WriteLine("Error while parsing ttl value: " + e.Message);
return(1);
}
if (!args.IsEmpty())
{
System.Console.Error.WriteLine("Can't understand argument: " + args[0]);
System.Console.Error.WriteLine("Usage is " + GetShortUsage());
return(1);
}
if (!modified)
{
System.Console.Error.WriteLine("No modifications were specified.");
return(1);
}
DistributedFileSystem dfs = AdminHelper.GetDFS(conf);
EnumSet <CacheFlag> flags = EnumSet.NoneOf <CacheFlag>();
if (force)
{
flags.AddItem(CacheFlag.Force);
}
try
{
dfs.ModifyCacheDirective(builder.Build(), flags);
System.Console.Out.WriteLine("Modified cache directive " + idString);
}
catch (IOException e)
{
System.Console.Error.WriteLine(AdminHelper.PrettifyException(e));
return(2);
}
return(0);
}
