org.duracloud.storage.provider

Interface StorageProvider

All Known Implementing Classes:

BrokeredStorageProvider, MockStorageProvider, ProbedStorageProvider, StorageProviderBase

public interface StorageProvider

A Storage Provider provides services which allow content to be stored in and retrieved from spaces.

Author:

Bill Branan

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEFAULT_MAX_RESULTS
static String	DEFAULT_MIMETYPE
static DateFormat	ISO8601_DATE_FORMAT
static String	PROPERTIES_CONTENT_CHECKSUM
static String	PROPERTIES_CONTENT_CREATOR
static String	PROPERTIES_CONTENT_FILE_CREATED
static String	PROPERTIES_CONTENT_FILE_LAST_ACCESSED
static String	PROPERTIES_CONTENT_FILE_MODIFIED
static String	PROPERTIES_CONTENT_FILE_PATH
static String	PROPERTIES_CONTENT_MD5
static String	PROPERTIES_CONTENT_MIMETYPE
static String	PROPERTIES_CONTENT_MODIFIED
static String	PROPERTIES_CONTENT_SIZE
static String	PROPERTIES_COPY_SOURCE
static String	PROPERTIES_COPY_SOURCE_STORE
static String	PROPERTIES_SPACE_ACL
static String	PROPERTIES_SPACE_ACL_GROUP
static String	PROPERTIES_SPACE_ACL_PUBLIC
static String	PROPERTIES_SPACE_COUNT
static String	PROPERTIES_SPACE_CREATED
static String	PROPERTIES_SPACE_SIZE
static String	PROPERTIES_STREAMING_HOST

Method Summary

Methods

Modifier and Type	Method and Description
String	addContent(String spaceId, String contentId, String contentMimeType, Map<String,String> userProperties, long contentSize, String contentChecksum, InputStream content) Adds content to a space.
String	copyContent(String sourceSpaceId, String sourceContentId, String destSpaceId, String destContentId) This method copies the content item found in source-space with the id of source-content-id into the dest-space, naming it to dest-content-id.
void	createSpace(String spaceId) Creates a new space.
void	deleteContent(String spaceId, String contentId) Removes content from a space.
void	deleteSpace(String spaceId) Deletes a space.
InputStream	getContent(String spaceId, String contentId) Gets content from a space.
Map<String,String>	getContentProperties(String spaceId, String contentId) Retrieves the properties associated with content.
Map<String,AclType>	getSpaceACLs(String spaceId) Retrieves the ACLs associated with a space.
Iterator<String>	getSpaceContents(String spaceId, String prefix) Provides access to the content files within a space.
List<String>	getSpaceContentsChunked(String spaceId, String prefix, long maxResults, String marker) Provides a listing of the content files within a space.
Map<String,String>	getSpaceProperties(String spaceId) Retrieves the properties associated with a space.
Iterator<String>	getSpaces() Provides a listing of all spaces owned by a customer.
void	setContentProperties(String spaceId, String contentId, Map<String,String> contentProperties) Sets the properties associated with content.
void	setSpaceACLs(String spaceId, Map<String,AclType> spaceACLs) Sets the ACLs associated with a space.

Field Detail

PROPERTIES_SPACE_CREATED

static final String PROPERTIES_SPACE_CREATED

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Constant Field Values

PROPERTIES_SPACE_COUNT

static final String PROPERTIES_SPACE_COUNT

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Constant Field Values

PROPERTIES_SPACE_SIZE

static final String PROPERTIES_SPACE_SIZE

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Constant Field Values

PROPERTIES_SPACE_ACL

static final String PROPERTIES_SPACE_ACL

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Constant Field Values

PROPERTIES_SPACE_ACL_GROUP

static final String PROPERTIES_SPACE_ACL_GROUP

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Constant Field Values

PROPERTIES_SPACE_ACL_PUBLIC

static final String PROPERTIES_SPACE_ACL_PUBLIC

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Constant Field Values

PROPERTIES_CONTENT_MIMETYPE

static final String PROPERTIES_CONTENT_MIMETYPE

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Constant Field Values

PROPERTIES_CONTENT_SIZE

static final String PROPERTIES_CONTENT_SIZE

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Constant Field Values

PROPERTIES_CONTENT_CHECKSUM

static final String PROPERTIES_CONTENT_CHECKSUM

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Constant Field Values

PROPERTIES_CONTENT_MODIFIED

static final String PROPERTIES_CONTENT_MODIFIED

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Constant Field Values

PROPERTIES_CONTENT_FILE_CREATED

static final String PROPERTIES_CONTENT_FILE_CREATED

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Constant Field Values

PROPERTIES_CONTENT_FILE_MODIFIED

static final String PROPERTIES_CONTENT_FILE_MODIFIED

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Constant Field Values

PROPERTIES_CONTENT_FILE_LAST_ACCESSED

static final String PROPERTIES_CONTENT_FILE_LAST_ACCESSED

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Constant Field Values

PROPERTIES_CONTENT_FILE_PATH

static final String PROPERTIES_CONTENT_FILE_PATH

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Constant Field Values

PROPERTIES_COPY_SOURCE

static final String PROPERTIES_COPY_SOURCE

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Constant Field Values

PROPERTIES_COPY_SOURCE_STORE

static final String PROPERTIES_COPY_SOURCE_STORE

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Constant Field Values

PROPERTIES_CONTENT_CREATOR

static final String PROPERTIES_CONTENT_CREATOR

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Constant Field Values

PROPERTIES_CONTENT_MD5

static final String PROPERTIES_CONTENT_MD5

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Constant Field Values

DEFAULT_MIMETYPE

static final String DEFAULT_MIMETYPE

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Constant Field Values

ISO8601_DATE_FORMAT

static final DateFormat ISO8601_DATE_FORMAT

DEFAULT_MAX_RESULTS

static final long DEFAULT_MAX_RESULTS

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Constant Field Values

PROPERTIES_STREAMING_HOST

static final String PROPERTIES_STREAMING_HOST

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Constant Field Values

Method Detail

getSpaces

Iterator<String> getSpaces()

Provides a listing of all spaces owned by a customer.

Returns:

Iterator listing spaceIds

getSpaceContents

Iterator<String> getSpaceContents(String spaceId,
                                String prefix)

Provides access to the content files within a space. Chunking of the list is handled internally. Prefix can be set to return only content IDs starting with the prefix value.

Parameters:

spaceId - - ID of the space

prefix - - The prefix of the content id (null for no constraints)

Returns:

Iterator of contentIds

Throws:

NotFoundException - if space with ID spaceId does not exist

StorageException - if errors occur

getSpaceContentsChunked

List<String> getSpaceContentsChunked(String spaceId,
                                   String prefix,
                                   long maxResults,
                                   String marker)

Provides a listing of the content files within a space. The number of items returned is limited to maxResults (default is 1000). Retrieve further results by including the last content ID in the previous list as the marker. Set prefix to return only content IDs starting with the prefix value.

Parameters:

spaceId - - ID of the space

prefix - - Only retrieve content IDs with this prefix (null for all content ids)

maxResults - - The maximum number of content IDs to return in the list (0 indicates default (1000))

marker - - The content ID marking the last item in the previous set (null indicates the first set of ids)

Returns:

List of contentIds

Throws:

NotFoundException - if space with ID spaceId does not exist

StorageException - if errors occur

createSpace

void createSpace(String spaceId)

Creates a new space. Depending on the storage implementation, the spaceId may be changed somewhat to comply with the naming rules of the underlying storage provider. The same spaceId value used here can be used in all other methods, as the conversion will be applied internally, however a call to getSpaces() may not include a space with exactly this same name.

Parameters:

spaceId - - ID of the space

Throws:

StorageException - if space with ID spaceId already exists

deleteSpace

void deleteSpace(String spaceId)

Deletes a space.

Parameters:

spaceId - - ID of the space

Throws:

NotFoundException - if space with ID spaceId does not exist

StorageException - if errors occur

getSpaceProperties

Map<String,String> getSpaceProperties(String spaceId)

Retrieves the properties associated with a space.

Parameters:

spaceId - - ID of the space

Returns:

Map of space properties or empty map if no properties exists

Throws:

NotFoundException - if space with ID spaceId does not exist

StorageException - if errors occur

getSpaceACLs

Map<String,AclType> getSpaceACLs(String spaceId)

Retrieves the ACLs associated with a space.

Parameters:

spaceId - - ID of the space

Returns:

Map of space ACLs or empty map if none exists

Throws:

NotFoundException - if space with ID spaceId does not exist

StorageException - if errors occur

setSpaceACLs

void setSpaceACLs(String spaceId,
                Map<String,AclType> spaceACLs)

Sets the ACLs associated with a space.

Parameters:

spaceId - - ID of the space

spaceACLs - - Updated space ACL. Note, null or empty arg spaceACLs will 'clear' the space ACLs.

Throws:

NotFoundException - if space with ID spaceId does not exist

StorageException - if errors occur

addContent

String addContent(String spaceId,
                String contentId,
                String contentMimeType,
                Map<String,String> userProperties,
                long contentSize,
                String contentChecksum,
                InputStream content)

Adds content to a space. Computes the checksum of the provided content and checks this against the checksum of the uploaded content to protect against loss or corruption during transfer.

Parameters:

spaceId - - ID of the space

contentId - - ID of the content in the space

contentMimeType - - the MIME type of the content being added

userProperties - - the metadata associated with the content

contentSize - - the file size (in bytes) of the content being added

contentChecksum - - the MD5 checksum of the content being added (null if no checksum is known)

content - - content to add

Returns:

The checksum of the provided content

Throws:

NotFoundException - if space with ID spaceId does not exist

StorageException - if errors occur

copyContent

String copyContent(String sourceSpaceId,
                 String sourceContentId,
                 String destSpaceId,
                 String destContentId)

This method copies the content item found in source-space with the id of source-content-id into the dest-space, naming it to dest-content-id.

Parameters:

sourceSpaceId - of content to copy

sourceContentId - of content to copy

destSpaceId - where copied content will end up

destContentId - given to copied content

Returns:

MD5 checksum of destination content item

getContent

InputStream getContent(String spaceId,
                     String contentId)

Gets content from a space.

Parameters:

spaceId - - ID of the space

contentId - - ID of the content in the space

Returns:

the content stream

Throws:

NotFoundException - if space with ID spaceId does not exist or the content item with ID contentId does not exist

StorageException - if errors occur

deleteContent

void deleteContent(String spaceId,
                 String contentId)

Removes content from a space.

Parameters:

spaceId - - ID of the space

contentId - - ID of the content in the space

Throws:

NotFoundException - if space with ID spaceId does not exist or the content item with ID contentId does not exist

StorageException - if errors occur

setContentProperties

void setContentProperties(String spaceId,
                        String contentId,
                        Map<String,String> contentProperties)

Sets the properties associated with content. This effectively removes all of the current content properties and adds a new set of properties. Some properties, such as system properties provided by the underlying storage system, cannot be updated or removed. Some of the values which cannot be updated or removed: Content-MD5 ETag Last-Modified Content-Type cannot be removed, but it can be updated

Parameters:

spaceId - - ID of the space

contentId - - ID of the content in the space

contentProperties - - new content properties

Throws:

NotFoundException - if space with ID spaceId does not exist or the content item with ID contentId does not exist

StorageException - if errors occur

getContentProperties

Map<String,String> getContentProperties(String spaceId,
                                      String contentId)

Retrieves the properties associated with content. This includes both properties generated by the underlying storage system as well as custom properties. Use the PROPERTIES_CONTENT_* constants to retrieve standard properties values.

Parameters:

spaceId - - ID of the space

contentId - - ID of the content in the space

Returns:

content properties

Throws:

NotFoundException - if space with ID spaceId does not exist or the content item with ID contentId does not exist

StorageException - if errors occur