org.duracloud.storage.provider

Class ProbedStorageProvider

java.lang.Object

org.duracloud.storage.provider.ProbedStorageProvider

All Implemented Interfaces:

MetricsProbed, StorageProvider

public abstract class ProbedStorageProvider
extends Object
implements StorageProvider, MetricsProbed

This class wraps a StorageProvider implementation, collecting timing metrics while passing calls down.

Author:

Andrew Woods

Field Summary

Fields

Modifier and Type	Field and Description
protected Metric	metric
protected MetricsTable	metricsTable
protected StorageProvider	storageProvider

Fields inherited from interface org.duracloud.storage.provider.StorageProvider

DEFAULT_MAX_RESULTS, DEFAULT_MIMETYPE, ISO8601_DATE_FORMAT, PROPERTIES_CONTENT_CHECKSUM, PROPERTIES_CONTENT_CREATOR, PROPERTIES_CONTENT_FILE_CREATED, PROPERTIES_CONTENT_FILE_LAST_ACCESSED, PROPERTIES_CONTENT_FILE_MODIFIED, PROPERTIES_CONTENT_FILE_PATH, PROPERTIES_CONTENT_MD5, PROPERTIES_CONTENT_MIMETYPE, PROPERTIES_CONTENT_MODIFIED, PROPERTIES_CONTENT_SIZE, PROPERTIES_COPY_SOURCE, PROPERTIES_COPY_SOURCE_STORE, PROPERTIES_SPACE_ACL, PROPERTIES_SPACE_ACL_GROUP, PROPERTIES_SPACE_ACL_PUBLIC, PROPERTIES_SPACE_COUNT, PROPERTIES_SPACE_CREATED, PROPERTIES_SPACE_SIZE, PROPERTIES_STREAMING_HOST

Constructor Summary

Constructors

Constructor and Description
ProbedStorageProvider()

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.
protected abstract MetricsProbed	getProbedCore()
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	setMetricsTable(MetricsTable metricsTable)
void	setSpaceACLs(String spaceId, Map<String,AclType> spaceACLs) Sets the ACLs associated with a space.
protected void	setStorageProvider(StorageProvider storageProvider)
protected void	startMetric(String methodName)
protected void	stopMetric(String methodName)

Methods inherited from class java.lang.Object

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

Field Detail

storageProvider

protected StorageProvider storageProvider

metricsTable

protected MetricsTable metricsTable

metric

protected Metric metric

Constructor Detail

ProbedStorageProvider

public ProbedStorageProvider()

Method Detail

getProbedCore

protected abstract MetricsProbed getProbedCore()

startMetric

protected void startMetric(String methodName)

stopMetric

protected void stopMetric(String methodName)

setMetricsTable

public void setMetricsTable(MetricsTable metricsTable)

Specified by:

setMetricsTable in interface MetricsProbed

setStorageProvider

protected void setStorageProvider(StorageProvider storageProvider)

addContent

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

Description copied from interface: StorageProvider

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.

Specified by:

addContent in interface StorageProvider

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

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

Description copied from interface: StorageProvider

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.

Specified by:

copyContent in interface StorageProvider

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

createSpace

public void createSpace(String spaceId)
                 throws StorageException

Description copied from interface: StorageProvider

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.

Specified by:

createSpace in interface StorageProvider

Parameters:

spaceId - - ID of the space

Throws:

StorageException - if space with ID spaceId already exists

deleteContent

public void deleteContent(String spaceId,
                 String contentId)
                   throws StorageException

Description copied from interface: StorageProvider

Removes content from a space.

Specified by:

deleteContent in interface StorageProvider

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

deleteSpace

public void deleteSpace(String spaceId)
                 throws StorageException

Description copied from interface: StorageProvider

Deletes a space.

Specified by:

deleteSpace in interface StorageProvider

Parameters:

spaceId - - ID of the space

Throws:

NotFoundException - if space with ID spaceId does not exist

StorageException - if errors occur

getContent

public InputStream getContent(String spaceId,
                     String contentId)
                       throws StorageException

Description copied from interface: StorageProvider

Gets content from a space.

Specified by:

getContent in interface StorageProvider

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

getContentProperties

public Map<String,String> getContentProperties(String spaceId,
                                      String contentId)
                                        throws StorageException

Description copied from interface: StorageProvider

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.

Specified by:

getContentProperties in interface StorageProvider

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

getSpaceContents

public Iterator<String> getSpaceContents(String spaceId,
                                String prefix)
                                  throws StorageException

Description copied from interface: StorageProvider

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.

Specified by:

getSpaceContents in interface StorageProvider

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

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

Description copied from interface: StorageProvider

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.

Specified by:

getSpaceContentsChunked in interface StorageProvider

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

getSpaceProperties

public Map<String,String> getSpaceProperties(String spaceId)
                                      throws StorageException

Description copied from interface: StorageProvider

Retrieves the properties associated with a space.

Specified by:

getSpaceProperties in interface StorageProvider

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

getSpaces

public Iterator<String> getSpaces()
                           throws StorageException

Description copied from interface: StorageProvider

Provides a listing of all spaces owned by a customer.

Specified by:

getSpaces in interface StorageProvider

Returns:

Iterator listing spaceIds

Throws:

StorageException

setContentProperties

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

Description copied from interface: StorageProvider

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

Specified by:

setContentProperties in interface StorageProvider

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

getSpaceACLs

public Map<String,AclType> getSpaceACLs(String spaceId)

Description copied from interface: StorageProvider

Retrieves the ACLs associated with a space.

Specified by:

getSpaceACLs in interface StorageProvider

Parameters:

spaceId - - ID of the space

Returns:

Map of space ACLs or empty map if none exists

setSpaceACLs

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

Description copied from interface: StorageProvider

Sets the ACLs associated with a space.

Specified by:

setSpaceACLs in interface StorageProvider

Parameters:

spaceId - - ID of the space

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