Package org.jclouds.blobstore.strategy.internal

Class MarkersGetDirectoryStrategy

java.lang.Object

org.jclouds.blobstore.strategy.internal.MarkersGetDirectoryStrategy

All Implemented Interfaces:

GetDirectoryStrategy

@Singleton
public class MarkersGetDirectoryStrategy
extends Object
implements GetDirectoryStrategy

Key-value implementations of BlobStore, such as S3, do not have directories. In following the rackspace cloud files project, we use an empty object '#{dirpath}' with content type set to 'application/directory'.

To interoperate with other S3 tools, we accept the following ways to tell if the directory exists:

• an object named '#{dirpath}_$folder$' or '#{dirpath}/' denoting a directory marker
• an object with content type set to 'application/directory' denoting a directory marker
• if there exists any objects with the prefix "#{dirpath}/", then the directory is said to exist
• if both a file with the name of a directory and a marker for that directory exists, then the *file masks the directory*, and the directory is never returned.

See Also:

MarkerFileMkdirStrategy

Field Summary

Fields

Modifier and Type	Field	Description
protected ResourceMetadataToRelativePathResourceMetadata	resource2Directory

Constructor Summary

Constructors

Constructor	Description
MarkersGetDirectoryStrategy(BlobStore connection, ResourceMetadataToRelativePathResourceMetadata resource2Directory)

Method Summary

Modifier and Type	Method	Description
StorageMetadata	execute(String containerName, String directory)

Methods inherited from class java.lang.Object

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

Field Detail

resource2Directory

protected final ResourceMetadataToRelativePathResourceMetadata resource2Directory

Constructor Detail

MarkersGetDirectoryStrategy

@Inject
public MarkersGetDirectoryStrategy(BlobStore connection,
                                   ResourceMetadataToRelativePathResourceMetadata resource2Directory)

Method Detail

execute

public StorageMetadata execute(String containerName,
                               String directory)

Specified by:

execute in interface GetDirectoryStrategy