alluxio.underfs.s3a

Class S3AUnderFileSystem.S3AObjectListingChunk

java.lang.Object

alluxio.underfs.s3a.S3AUnderFileSystem.S3AObjectListingChunk

All Implemented Interfaces:

ObjectUnderFileSystem.ObjectListingChunk

Enclosing class:

S3AUnderFileSystem

protected final class S3AUnderFileSystem.S3AObjectListingChunk
extends Object
implements ObjectUnderFileSystem.ObjectListingChunk

Wrapper over S3 ListObjectsV2Request.

Method Summary

Modifier and Type	Method and Description
String[]	getCommonPrefixes() Use common prefixes to infer pseudo-directories in object store.
ObjectUnderFileSystem.ObjectListingChunk	getNextChunk() Gets next chunk of object listings.
ObjectUnderFileSystem.ObjectStatus[]	getObjectStatuses() Returns objects in a pseudo-directory which may be a file or a directory.
Boolean	hasNextChunk() Gets if there is more chunks to fetch WITHOUT actually fetching the next chunk.

Methods inherited from class java.lang.Object

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

Method Detail

getObjectStatuses

public ObjectUnderFileSystem.ObjectStatus[] getObjectStatuses()

Description copied from interface: ObjectUnderFileSystem.ObjectListingChunk

Returns objects in a pseudo-directory which may be a file or a directory.

Specified by:

getObjectStatuses in interface ObjectUnderFileSystem.ObjectListingChunk

Returns:

a list of object statuses

getCommonPrefixes

public String[] getCommonPrefixes()

Description copied from interface: ObjectUnderFileSystem.ObjectListingChunk

Use common prefixes to infer pseudo-directories in object store.

Specified by:

getCommonPrefixes in interface ObjectUnderFileSystem.ObjectListingChunk

Returns:

a list of common prefixes

getNextChunk

@Nullable
public ObjectUnderFileSystem.ObjectListingChunk getNextChunk()
                                                                throws IOException

Description copied from interface: ObjectUnderFileSystem.ObjectListingChunk

Gets next chunk of object listings.

Specified by:

getNextChunk in interface ObjectUnderFileSystem.ObjectListingChunk

Returns:

null if listing did not find anything or is done, otherwise return new ObjectUnderFileSystem.ObjectListingChunk for the next chunk

Throws:

IOException

hasNextChunk

public Boolean hasNextChunk()

Description copied from interface: ObjectUnderFileSystem.ObjectListingChunk

Gets if there is more chunks to fetch WITHOUT actually fetching the next chunk.

Specified by:

hasNextChunk in interface ObjectUnderFileSystem.ObjectListingChunk

Returns:

true if there is, no if there isn't, NULL if it cannot tell