Package org.nuxeo.ecm.core.blob

Class DocumentBlobManagerComponent

java.lang.Object

org.nuxeo.runtime.model.DefaultComponent

org.nuxeo.ecm.core.blob.DocumentBlobManagerComponent

All Implemented Interfaces:

DocumentBlobManager, Adaptable, Component, Extensible, TimestampedService

public class DocumentBlobManagerComponent
extends DefaultComponent
implements DocumentBlobManager

Implementation of the service managing Blobs associated to a Document or a repository.

Since:

9.2

Field Summary

Fields

Modifier and Type	Field	Description
protected static final int	BINARY_GC_TX_TIMEOUT_SEC
protected BlobDispatcher	blobDispatcher
static final String	BLOBS_CANDIDATE_FOR_DELETION_EVENT	Event fired to GC blobs candidates for deletion.
static final String	BLOBS_DELETED_DOMAIN_EVENT	Event fired to record blob deletion.
protected static final String	DOC_WITH_BLOB_KEYS_IN_QUERY
static final String	MAIN_BLOB_XPATH
protected static final String	XP

Fields inherited from class org.nuxeo.runtime.model.DefaultComponent

lastModified, name

Constructor Summary

Constructors

Constructor	Description
DocumentBlobManagerComponent()

Method Summary

Modifier and Type	Method	Description
void	checkCanDeleteBlob(String repositoryName)	Checks that blobs can be safely deleted for the given repository.
boolean	deleteBlob(String repositoryName, String key, boolean dryRun)	Deletes the blob associated to the given key.
protected void	findBlobs(Object value, List<String> split, List<ManagedBlob> blobs)
void	freezeVersion(Document doc)	Freezes the blobs' versions on a document version when it is created via a check in.
protected void	freezeVersion(Document.BlobAccessor accessor, Document doc)
BinaryManagerStatus	garbageCollectBinaries(boolean delete)	Garbage collect the unused binaries.
protected ManagedBlob	getBlob(Document doc, String xpath)
protected BlobDispatcher	getBlobDispatcher()
protected String	getBlobKeyReplacement(ManagedBlob blob)	A key may have been replaced by an async digest computation, use the new one.
protected String	getBlobKeyReplacement(ManagedBlob blob, boolean addPrefix)
protected BlobProvider	getBlobProvider(String providerId)
protected BlobProvider	getBlobProvider(String key, String repositoryName)
InputStream	getConvertedStream(Blob blob, String mimeType, DocumentModel doc)	Gets an InputStream for a conversion to the given MIME type.
protected DocumentBlobProvider	getDocumentBlobProvider(Blob blob)
protected List<BinaryGarbageCollector>	getGarbageCollectors()
protected ManagedBlob	getMainBlob(Document doc)
Collection<String>	getProviderIds(String repository)	Gets the list of the provider ids that are used by the given repository.
List<ManagedBlob>	getRetainableBlobs(Document doc)
protected List<String>	getSharedStorage()
boolean	hasSharedStorage()	Compute if there are shared storage.
boolean	isBinariesGarbageCollectionInProgress()	Checks if a garbage collection of the binaries in progress.
boolean	isUseRepositoryName()	Are the blobs from a repository stored in a provider with the same name.
void	notifyAfterCopy(Document doc)	Notifies the blob manager that the document has been copied.
void	notifyBeforeRemove(Document doc)	Notifies the blob manager that the document is about to be removed.
void	notifyChanges(Document doc, Set<String> xpaths)	Notifies the blob manager that a set of xpaths have changed on a document.
void	notifyMakeRecord(Document doc)	Notifies the blob manager that the document was made a record.
void	notifySetLegalHold(Document doc, boolean hold)	Notifies the blob manager that the document's legal hold status was changed.
void	notifySetRetainUntil(Document doc, Calendar retainUntil)	Notifies the blob manager that the document's retention date was changed.
Blob	readBlob(BlobInfo blobInfo, String repositoryName)	Deprecated. since 11.1, use readBlob(BlobInfo, Document, String) instead
Blob	readBlob(BlobInfo blobInfo, Document doc, String xpath)	Reads a Blob from storage.
protected Blob	readBlob(BlobInfo blobInfo, Document doc, String xpath, String repositoryName)
void	registerContribution(Object contribution, String extensionPoint, ComponentInstance contributor)
protected <R> R	runInTransaction(Supplier<R> supplier, int timeout)	Runs the given Supplier in a transaction with the given timeout.
protected String	stripBlobKeyPrefix(String key)
void	unregisterContribution(Object contribution, String extensionPoint, ComponentInstance contributor)
protected void	updateBlob(ManagedBlob blob, Consumer<BlobUpdateContext> contextFiller)
void	updateBlob(Document doc, Consumer<BlobUpdateContext> contextFiller)	Update main blob of the doc.
protected void	updateRetainedBlobs(Document doc, Consumer<BlobUpdateContext> contextFiller)
String	writeBlob(Blob blob, Document doc, String xpath)	Writes a Blob to storage and returns its key.

Methods inherited from class org.nuxeo.runtime.model.DefaultComponent

activate, addRuntimeMessage, addRuntimeMessage, deactivate, getAdapter, getDescriptor, getDescriptors, getLastModified, getRegistry, register, registerExtension, setLastModified, setModifiedNow, setName, start, stop, unregister, unregisterExtension

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.nuxeo.runtime.model.Component

getApplicationStartedOrder

Field Details

XP

protected static final String XP

See Also:

• Constant Field Values

BINARY_GC_TX_TIMEOUT_SEC

protected static final int BINARY_GC_TX_TIMEOUT_SEC

See Also:

• Constant Field Values

BLOBS_CANDIDATE_FOR_DELETION_EVENT

public static final String BLOBS_CANDIDATE_FOR_DELETION_EVENT

Event fired to GC blobs candidates for deletion.

Since:

2023

See Also:

• Constant Field Values

BLOBS_DELETED_DOMAIN_EVENT

public static final String BLOBS_DELETED_DOMAIN_EVENT

Event fired to record blob deletion.

Since:

2023

See Also:

• Constant Field Values

DOC_WITH_BLOB_KEYS_IN_QUERY

protected static final String DOC_WITH_BLOB_KEYS_IN_QUERY

See Also:

• Constant Field Values

MAIN_BLOB_XPATH

public static final String MAIN_BLOB_XPATH

See Also:

• Constant Field Values

blobDispatcher

protected volatile BlobDispatcher blobDispatcher

Constructor Details

DocumentBlobManagerComponent

public DocumentBlobManagerComponent()

Method Details

registerContribution

public void registerContribution(Object contribution,
 String extensionPoint,
 ComponentInstance contributor)

Overrides:

registerContribution in class DefaultComponent

unregisterContribution

public void unregisterContribution(Object contribution,
 String extensionPoint,
 ComponentInstance contributor)

Overrides:

unregisterContribution in class DefaultComponent

getBlobDispatcher

protected BlobDispatcher getBlobDispatcher()

getBlobProvider

protected BlobProvider getBlobProvider(String providerId)

getDocumentBlobProvider

protected DocumentBlobProvider getDocumentBlobProvider(Blob blob)

readBlob

public Blob readBlob(BlobInfo blobInfo,
 Document doc,
 String xpath)
              throws IOException

Reads a Blob from storage.

The BlobInfo (coming from the database) contains the blob key, which may or may not be prefixed by a blob provider id.

Specified by:

readBlob in interface DocumentBlobManager

Parameters:

blobInfo - the blob information

doc - the document to which this blob belongs

xpath - the xpath of the blob in the document

Returns:

a managed blob

Throws:

IOException

readBlob

protected Blob readBlob(BlobInfo blobInfo,
 Document doc,
 String xpath,
 String repositoryName)
                 throws IOException

Throws:

IOException

readBlob

@Deprecated
public Blob readBlob(BlobInfo blobInfo,
 String repositoryName)
              throws IOException

Deprecated.

since 11.1, use readBlob(BlobInfo, Document, String) instead

Reads a Blob from storage.

The BlobInfo (coming from the database) contains the blob key, which may or may not be prefixed by a blob provider id.

Specified by:

readBlob in interface DocumentBlobManager

Parameters:

blobInfo - the blob information

repositoryName - the repository to which this blob belongs

Returns:

a managed blob

Throws:

IOException

getBlobProvider

protected BlobProvider getBlobProvider(String key,
 String repositoryName)

writeBlob

public String writeBlob(Blob blob,
 Document doc,
 String xpath)
                 throws IOException

Writes a Blob to storage and returns its key.

The passed blob may be null, in which case a null key is returned after checking that deleting this blob is allowed.

If the blob is managed and already uses the provider that's expected for this blob and document, there is no need to recompute a key. Otherwise, go through the blob provider.

Specified by:

writeBlob in interface DocumentBlobManager

Parameters:

blob - the blob

doc - the document to which this blob belongs

xpath - the xpath of blob in doc

Returns:

the blob key

Throws:

IOException

getBlobKeyReplacement

protected String getBlobKeyReplacement(ManagedBlob blob)

A key may have been replaced by an async digest computation, use the new one.

getBlobKeyReplacement

protected String getBlobKeyReplacement(ManagedBlob blob,
 boolean addPrefix)

getConvertedStream

public InputStream getConvertedStream(Blob blob,
 String mimeType,
 DocumentModel doc)
                               throws IOException

Description copied from interface: DocumentBlobManager

Gets an InputStream for a conversion to the given MIME type.

Like all InputStream, the result must be closed when done with it to avoid resource leaks.

Specified by:

getConvertedStream in interface DocumentBlobManager

Parameters:

blob - the blob

mimeType - the MIME type to convert to

doc - the document that holds the blob

Returns:

the stream, or null if no conversion is available for the given MIME type

Throws:

IOException

freezeVersion

protected void freezeVersion(Document.BlobAccessor accessor,
 Document doc)

freezeVersion

public void freezeVersion(Document doc)

Description copied from interface: DocumentBlobManager

Freezes the blobs' versions on a document version when it is created via a check in.

Specified by:

freezeVersion in interface DocumentBlobManager

Parameters:

doc - the new document version

notifyChanges

public void notifyChanges(Document doc,
 Set<String> xpaths)

Description copied from interface: DocumentBlobManager

Notifies the blob manager that a set of xpaths have changed on a document.

Specified by:

notifyChanges in interface DocumentBlobManager

Parameters:

doc - the document

xpaths - the set of changed xpaths

notifyMakeRecord

public void notifyMakeRecord(Document doc)

Description copied from interface: DocumentBlobManager

Notifies the blob manager that the document was made a record.

Specified by:

notifyMakeRecord in interface DocumentBlobManager

Parameters:

doc - the document

notifyAfterCopy

public void notifyAfterCopy(Document doc)

Description copied from interface: DocumentBlobManager

Notifies the blob manager that the document has been copied.

Specified by:

notifyAfterCopy in interface DocumentBlobManager

Parameters:

doc - the new document, the result of the copy

notifyBeforeRemove

public void notifyBeforeRemove(Document doc)

Description copied from interface: DocumentBlobManager

Notifies the blob manager that the document is about to be removed.

Specified by:

notifyBeforeRemove in interface DocumentBlobManager

Parameters:

doc - the document

notifySetRetainUntil

public void notifySetRetainUntil(Document doc,
 Calendar retainUntil)

Description copied from interface: DocumentBlobManager

Notifies the blob manager that the document's retention date was changed.

Specified by:

notifySetRetainUntil in interface DocumentBlobManager

Parameters:

doc - the document

notifySetLegalHold

public void notifySetLegalHold(Document doc,
 boolean hold)

Description copied from interface: DocumentBlobManager

Notifies the blob manager that the document's legal hold status was changed.

Specified by:

notifySetLegalHold in interface DocumentBlobManager

Parameters:

doc - the document

getRetainableBlobs

public List<ManagedBlob> getRetainableBlobs(Document doc)

findBlobs

protected void findBlobs(Object value,
 List<String> split,
 List<ManagedBlob> blobs)

updateRetainedBlobs

protected void updateRetainedBlobs(Document doc,
 Consumer<BlobUpdateContext> contextFiller)

updateBlob

protected void updateBlob(ManagedBlob blob,
 Consumer<BlobUpdateContext> contextFiller)

Since:

2023

updateBlob

public void updateBlob(Document doc,
 Consumer<BlobUpdateContext> contextFiller)

Update main blob of the doc.

getMainBlob

protected ManagedBlob getMainBlob(Document doc)

getBlob

protected ManagedBlob getBlob(Document doc,
 String xpath)

stripBlobKeyPrefix

protected String stripBlobKeyPrefix(String key)

getGarbageCollectors

protected List<BinaryGarbageCollector> getGarbageCollectors()

checkCanDeleteBlob

public void checkCanDeleteBlob(String repositoryName)

Description copied from interface: DocumentBlobManager

Checks that blobs can be safely deleted for the given repository. If the call returns without throwing an Exception, blobs can be safely deleted calling DocumentBlobManager.deleteBlob(String, String, boolean).

Specified by:

checkCanDeleteBlob in interface DocumentBlobManager

Parameters:

repositoryName - the repositoryName

deleteBlob

public boolean deleteBlob(String repositoryName,
 String key,
 boolean dryRun)
                   throws IOException

Description copied from interface: DocumentBlobManager

Deletes the blob associated to the given key. The method checks that the blob key is not referenced by any document of the given repository.

The repositories must have the Repository.CAPABILITY_QUERY_BLOB_KEYS capability (i.e. ecm:blobKeys populated).

Specified by:

deleteBlob in interface DocumentBlobManager

Parameters:

repositoryName - the repository where the blob key comes from

key - the blob key

dryRun - if false, effectively deletes the blob, dry run otherwise

Returns:

true if the blob has been deleted, false if the blob is referenced and cannot be deleted

Throws:

IOException - when reading/deleting the blob from the underlying blob provider

hasSharedStorage

public boolean hasSharedStorage()

Description copied from interface: DocumentBlobManager

Compute if there are shared storage.

Specified by:

hasSharedStorage in interface DocumentBlobManager

Returns:

true if at least 2 providers points to the same store, false otherwise

getSharedStorage

protected List<String> getSharedStorage()

garbageCollectBinaries

public BinaryManagerStatus garbageCollectBinaries(boolean delete)

Description copied from interface: DocumentBlobManager

Garbage collect the unused binaries.

Specified by:

garbageCollectBinaries in interface DocumentBlobManager

Parameters:

delete - if false don't actually delete the garbage collected binaries (but still return statistics about them), if true delete them

Returns:

a status about the number of garbage collected binaries

runInTransaction

protected <R> R runInTransaction(Supplier<R> supplier,
 int timeout)

Runs the given Supplier in a transaction with the given timeout.

Since:

11.1

isBinariesGarbageCollectionInProgress

public boolean isBinariesGarbageCollectionInProgress()

Description copied from interface: DocumentBlobManager

Checks if a garbage collection of the binaries in progress.

Specified by:

isBinariesGarbageCollectionInProgress in interface DocumentBlobManager

Returns:

true if a garbage collection of the binaries is in progress

isUseRepositoryName

public boolean isUseRepositoryName()

Description copied from interface: DocumentBlobManager

Are the blobs from a repository stored in a provider with the same name.

Specified by:

isUseRepositoryName in interface DocumentBlobManager

Returns:

true if the blobs are dispatched to the provider with the same name than the repository

getProviderIds

public Collection<String> getProviderIds(String repository)

Description copied from interface: DocumentBlobManager

Gets the list of the provider ids that are used by the given repository.

Specified by:

getProviderIds in interface DocumentBlobManager

Parameters:

repository - the repository name

Returns:

the list of provider ids where blob can be dispatched for the given repository