Class CachingBlobStore
- java.lang.Object
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- org.nuxeo.ecm.core.blob.AbstractBlobStore
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- org.nuxeo.ecm.core.blob.CachingBlobStore
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- All Implemented Interfaces:
BlobStore
public class CachingBlobStore extends AbstractBlobStore
Blob store wrapper that caches blobs locally because fetching them may be expensive.- Since:
- 11.1
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Nested Class Summary
Nested Classes Modifier and Type Class Description class
CachingBlobStore.CachingBinaryGarbageCollector
Garbage collector that delegates to the underlying one, but purges the cache after an actual GC is done.-
Nested classes/interfaces inherited from interface org.nuxeo.ecm.core.blob.BlobStore
BlobStore.OptionalOrUnknown<T>
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Field Summary
Fields Modifier and Type Field Description Path
cacheDir
protected FileCache
fileCache
protected BinaryGarbageCollector
gc
protected BlobStore
store
protected PathStrategyFlat
tmpPathStrategy
protected BlobStore
tmpStore
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Fields inherited from class org.nuxeo.ecm.core.blob.AbstractBlobStore
BYTE_RANGE_SEP, keyStrategy, name
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Constructor Summary
Constructors Constructor Description CachingBlobStore(String name, BlobStore store, CachingConfiguration config)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
copyBlob(String key, BlobStore sourceStore, String sourceKey, boolean atomicMove)
Writes a file based on a key, as a copy/move from a source in another blob store.void
deleteBlob(String key)
Deletes a blob based on a key.BinaryGarbageCollector
getBinaryGarbageCollector()
Returns the binary garbage collector (GC).BlobStore.OptionalOrUnknown<Path>
getFile(String key)
Gets an already-existing file containing the blob for the given key, if present.BlobStore.OptionalOrUnknown<InputStream>
getStream(String key)
Gets the stream of the blob for the given key, if present.boolean
hasVersioning()
Whether this blob store has versioning.boolean
readBlob(String key, Path dest)
Reads a blob based on its key into the given file.BlobStore
unwrap()
If this blob store wraps another one, returns it, otherwise returns this.String
writeBlob(BlobWriteContext blobWriteContext)
Writes a blob.void
writeBlobProperties(BlobUpdateContext blobUpdateContext)
Sets properties on a blob.-
Methods inherited from class org.nuxeo.ecm.core.blob.AbstractBlobStore
copyBlobIsOptimized, deleteBlob, getByteRangeFromKey, getKeyStrategy, getName, logTrace, logTrace, logTrace, randomLong, randomString, setByteRangeInKey, stripBlobKeyPrefix, transfer, transfer, transfer, writeBlob
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Field Detail
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tmpPathStrategy
protected final PathStrategyFlat tmpPathStrategy
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gc
protected final BinaryGarbageCollector gc
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Constructor Detail
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CachingBlobStore
public CachingBlobStore(String name, BlobStore store, CachingConfiguration config)
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Method Detail
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hasVersioning
public boolean hasVersioning()
Description copied from interface:BlobStore
Whether this blob store has versioning.With versioning, two writes may use the same key. The returned keys will include a different version number to distinguish the writes.
- Specified by:
hasVersioning
in interfaceBlobStore
- Overrides:
hasVersioning
in classAbstractBlobStore
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unwrap
public BlobStore unwrap()
Description copied from interface:BlobStore
If this blob store wraps another one, returns it, otherwise returns this.- Specified by:
unwrap
in interfaceBlobStore
- Overrides:
unwrap
in classAbstractBlobStore
- Returns:
- the lowest-level blob store
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writeBlob
public String writeBlob(BlobWriteContext blobWriteContext) throws IOException
Description copied from interface:BlobStore
Writes a blob.Note that the returned key may be different than the one requested by the
BlobWriteContext
, if the blob store needs additional version info to retrieve it.- Parameters:
blobWriteContext
- the context of the blob write, including the blob- Returns:
- the key to use to read this blob in the future
- Throws:
IOException
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copyBlob
public boolean copyBlob(String key, BlobStore sourceStore, String sourceKey, boolean atomicMove) throws IOException
Description copied from interface:BlobStore
Writes a file based on a key, as a copy/move from a source in another blob store.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.
- Parameters:
key
- the keysourceStore
- the source storesourceKey
- the source keyatomicMove
-true
for an atomic move,false
for a regular copy- Returns:
true
if the file was found in the source store,false
if it was not found- Throws:
IOException
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getFile
public BlobStore.OptionalOrUnknown<Path> getFile(String key)
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
public BlobStore.OptionalOrUnknown<InputStream> getStream(String key) throws IOException
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
public boolean readBlob(String key, Path dest) throws IOException
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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writeBlobProperties
public void writeBlobProperties(BlobUpdateContext blobUpdateContext) throws IOException
Description copied from interface:BlobStore
Sets properties on a blob.- Specified by:
writeBlobProperties
in interfaceBlobStore
- Overrides:
writeBlobProperties
in classAbstractBlobStore
- Parameters:
blobUpdateContext
- the blob update context- Throws:
IOException
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deleteBlob
public void deleteBlob(String key)
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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getBinaryGarbageCollector
public BinaryGarbageCollector 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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