/// <summary>
/// Sets up the storage directories for a block pool under
/// <see cref="DFSConfigKeys.DfsDatanodeDataDirKey"/>
/// . For each element
/// in
/// <see cref="DFSConfigKeys.DfsDatanodeDataDirKey"/>
/// , the subdirectories
/// represented by the first four elements of the <code>state</code> array
/// will be created and populated.
/// See
/// <see cref="UpgradeUtilities.CreateBlockPoolStorageDirs(string[], string, string)"
/// />
/// </summary>
/// <param name="bpid">block pool Id</param>
/// <param name="state">
/// a row from the testCases table which indicates which directories
/// to setup for the node
/// </param>
/// <returns>file paths representing block pool storage directories</returns>
/// <exception cref="System.Exception"/>
internal virtual string[] CreateBlockPoolStorageState(string bpid, bool[] state)
{
string[] baseDirs = conf.GetStrings(DFSConfigKeys.DfsDatanodeDataDirKey);
UpgradeUtilities.CreateEmptyDirs(baseDirs);
UpgradeUtilities.CreateDataNodeStorageDirs(baseDirs, "current");
// After copying the storage directories from master datanode, empty
// the block pool storage directories
string[] bpDirs = UpgradeUtilities.CreateEmptyBPDirs(baseDirs, bpid);
if (state[CurrentExists])
{
// current
UpgradeUtilities.CreateBlockPoolStorageDirs(baseDirs, "current", bpid);
}
if (state[PreviousExists])
{
// previous
UpgradeUtilities.CreateBlockPoolStorageDirs(baseDirs, "previous", bpid);
}
if (state[PreviousTmpExists])
{
// previous.tmp
UpgradeUtilities.CreateBlockPoolStorageDirs(baseDirs, "previous.tmp", bpid);
}
if (state[RemovedTmpExists])
{
// removed.tmp
UpgradeUtilities.CreateBlockPoolStorageDirs(baseDirs, "removed.tmp", bpid);
}
return(bpDirs);
}