alluxio.underfs.hdfs.acl

Class SupportedHdfsAclProvider

java.lang.Object

alluxio.underfs.hdfs.acl.SupportedHdfsAclProvider

All Implemented Interfaces:

HdfsAclProvider

@ThreadSafe
public class SupportedHdfsAclProvider
extends java.lang.Object
implements HdfsAclProvider

Provides the HDFS ACLs. This is only supported in Hadoop versions 2.4 and greater.

Constructor Summary

Constructors

Constructor and Description
SupportedHdfsAclProvider()

Method Summary

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

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SupportedHdfsAclProvider

public SupportedHdfsAclProvider()

Method Detail

getAcl

public Pair<AccessControlList,DefaultAccessControlList> getAcl(org.apache.hadoop.fs.FileSystem hdfs,
                                                               java.lang.String path)
                                                        throws java.io.IOException

Description copied from interface: HdfsAclProvider

Returns the AccessControlList from an hdfs path.

Specified by:

getAcl in interface HdfsAclProvider

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:

java.io.IOException - if ACL is supported but cannot be retrieved

setAclEntries

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

Description copied from interface: HdfsAclProvider

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

Specified by:

setAclEntries in interface HdfsAclProvider

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:

java.io.IOException - if ACL can not be set