Class EmptyBlobStore
- All Implemented Interfaces:
BlobStore
- Since:
- 11.5
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Nested Class Summary
Nested classes/interfaces inherited from interface org.nuxeo.ecm.core.blob.BlobStore
BlobStore.OptionalOrUnknown<T>
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Field Summary
Fields inherited from class org.nuxeo.ecm.core.blob.AbstractBlobStore
blobProviderId, BYTE_RANGE_SEP, keyStrategy, name
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionvoid
clear()
INTERNAL (TESTS).boolean
copyBlobIsOptimized
(BlobStore sourceStore) Checks if blob copy/move from another blob store to this one can be done efficiently.copyOrMoveBlob
(String key, BlobStore sourceStore, String sourceKey, boolean atomicMove) Writes a file based on a key, as an optimized copy/move from a source in another compatible blob store.void
deleteBlob
(String key) Deletes a blob based on a key.Returns the binary garbage collector (GC).Gets an already-existing file containing the blob for the given key, if present.Gets the stream of the blob for the given key, if present.boolean
Reads a blob based on its key into the given file.protected String
writeBlobGeneric
(BlobWriteContext blobWriteContext) Writes the blob without using any store-to-store optimization.Methods inherited from class org.nuxeo.ecm.core.blob.AbstractBlobStore
deleteBlob, getBlobKeyReplacement, getByteRangeFromKey, getKeyStrategy, getName, hasVersioning, logTrace, logTrace, logTrace, notifyAsyncDigest, randomLong, randomString, setByteRangeInKey, stripBlobKeyPrefix, stripBlobKeyVersionSuffix, transfer, transfer, transfer, unwrap, useAsyncDigest, writeBlob, writeBlob, writeBlobProperties, writeBlobUsingOptimizedCopy
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.nuxeo.ecm.core.blob.BlobStore
copyBlob, exists, hasDefaultStorageClass
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Field Details
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gc
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Constructor Details
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EmptyBlobStore
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Method Details
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writeBlobGeneric
Description copied from class:AbstractBlobStore
Writes the blob without using any store-to-store optimization.- Overrides:
writeBlobGeneric
in classAbstractBlobStore
- Throws:
IOException
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copyBlobIsOptimized
Description copied from interface:BlobStore
Checks if blob copy/move from another blob store to this one can be done efficiently.- Specified by:
copyBlobIsOptimized
in interfaceBlobStore
- Overrides:
copyBlobIsOptimized
in classAbstractBlobStore
- Parameters:
sourceStore
- the source store- Returns:
true
if the copy/move can be done efficiently
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copyOrMoveBlob
public String copyOrMoveBlob(String key, BlobStore sourceStore, String sourceKey, boolean atomicMove) throws IOException Description copied from interface:BlobStore
Writes a file based on a key, as an optimized copy/move from a source in another compatible blob store.The target
key
may benull
, which is a signal from the caller that it has determined that deduplication is enabled and async digest computation is enabled, but the needed digest hasn't been computed, so this method should either find the digest in an efficient way if it can, or otherwise trigger an async digest computation.If the copy/move is requested to be atomic, then the destination file is created atomically. In case of atomic move, in some stores the destination will be created atomically but the source will only be deleted afterwards.
The returned key may be different than the passed one when versioning is used.
- Parameters:
key
- the key; ornull
if the store should choose it or trigger async digest computationsourceStore
- the source storesourceKey
- the source keyatomicMove
-true
for an atomic move,false
for a regular copy- Returns:
- the key of the copied/moved file, or
null
if copy/move failed - Throws:
IOException
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getFile
Description copied from interface:BlobStore
Gets an already-existing file containing the blob for the given key, if present.Note that this method is best-effort, it may return unknown even though the blob exists in the store, it's just that it's not handily available locally in a file.
- Parameters:
key
- the blob key- Returns:
- the file containing the blob, or empty if the blob cannot be found, or unknown if no file is available locally
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getStream
Description copied from interface:BlobStore
Gets the stream of the blob for the given key, if present.Note that this method is best-effort, it may return unknown even though the blob exists in the store, it's just that it's not efficient to return it as a stream.
- Parameters:
key
- the blob key- Returns:
- the blob stream, or empty if the blob cannot be found, or unknown if no stream is efficiently available
- Throws:
IOException
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readBlob
Description copied from interface:BlobStore
Reads a blob based on its key into the given file.- Parameters:
key
- the blob keydest
- the file to use to store the fetched data- Returns:
true
if the file was fetched,false
if the file was not found- Throws:
IOException
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deleteBlob
Description copied from interface:BlobStore
Deletes a blob based on a key. No error occurs if the blob does not exist.This method does not throw
IOException
, but may log an error message.- Parameters:
key
- the blob key
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clear
public void clear()Description copied from interface:BlobStore
INTERNAL (TESTS). Clears the blob store of all its data. -
getBinaryGarbageCollector
Description copied from interface:BlobStore
Returns the binary garbage collector (GC).Several calls to this method will return the same GC, so that its status can be monitored using
BinaryGarbageCollector.isInProgress()
.- Returns:
- the binary GC
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