alluxio.underfs.hdfs

Interface HdfsAclProvider

All Known Implementing Classes:

NoopHdfsAclProvider, SupportedHdfsAclProvider

public interface HdfsAclProvider

Interface for providing HDFS ACLs.

Method Summary

Modifier and Type	Method and Description
Pair<AccessControlList,DefaultAccessControlList>	getAcl(org.apache.hadoop.fs.FileSystem hdfs, String path) Returns the AccessControlList from an hdfs path.
void	setAclEntries(org.apache.hadoop.fs.FileSystem hdfs, String path, List<AclEntry> aclEntries) Sets the ACL and default ACL for an hdfs path using ACL entries.

Method Detail

getAcl

@Nullable
Pair<AccessControlList,DefaultAccessControlList> getAcl(org.apache.hadoop.fs.FileSystem hdfs,
                                                                  String path)
                                                           throws IOException

Returns the AccessControlList from an hdfs path.

Parameters:

hdfs - the HDFS client

path - the path to retrieve the ACL for

Returns:

a Pair object containing the AccessControlList representation and the DefaultAccessControlList representation or null if ACL is unsupported/disabled

Throws:

IOException - if ACL is supported but cannot be retrieved

setAclEntries

void setAclEntries(org.apache.hadoop.fs.FileSystem hdfs,
                   String path,
                   List<AclEntry> aclEntries)
            throws IOException

Sets the ACL and default ACL for an hdfs path using ACL entries.

Parameters:

hdfs - the HDFS client

path - the path to set the ACL entries for

aclEntries - list of AclEntries, could be a representation of AccessControlList or DefaultAccessControlList

Throws:

IOException - if ACL can not be set