Package org.nuxeo.ecm.core.blob

Class AbstractBlobGarbageCollector

java.lang.Object

org.nuxeo.ecm.core.blob.AbstractBlobGarbageCollector

All Implemented Interfaces:

BinaryGarbageCollector

Direct Known Subclasses:

AzureBlobStore.AzureBlobGarbageCollector, EmptyBlobStore.EmptyBlobGarbageCollector, GoogleStorageBlobStore.GoogleStorageBlobGarbageCollector, GridFSBlobStore.GridFSBlobGarbageCollector, InMemoryBlobStore.InMemoryBlobGarbageCollector, S3BlobStore.S3BlobGarbageCollector

public abstract class AbstractBlobGarbageCollector
extends Object
implements BinaryGarbageCollector

Basic implementation for a garbage collector recording marked or to-delete blobs in memory.

Field Summary

Fields

Modifier and Type	Field	Description
protected Set<String>	marked
protected long	startTime
protected BinaryManagerStatus	status
protected Set<String>	toDelete

Constructor Summary

Constructors

Constructor	Description
AbstractBlobGarbageCollector()

Method Summary

Modifier and Type	Method	Description
void	computeToDelete()	Computes keys candidate for deletion.
BinaryManagerStatus	getStatus()	Gets the status of the binaries to GC and of those that won't be.
Set<String>	getUnmarkedBlobsAndUpdateStatus()
boolean	isInProgress()	Checks if a GC is in progress.
void	mark(String digest)	Marks a binary as being in use.
void	removeBlobs(Set<String> keys)
void	removeUnmarkedBlobsAndUpdateStatus(boolean delete)
void	start()	Starts the garbage collection process.
void	stop(boolean delete)	Stops the garbage collection process and deletes all binaries that have not been marked (sweep).

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.binary.BinaryGarbageCollector

getId

Field Detail

startTime

protected volatile long startTime

status

protected BinaryManagerStatus status

marked

protected Set<String> marked

toDelete

protected Set<String> toDelete

Constructor Detail

AbstractBlobGarbageCollector

public AbstractBlobGarbageCollector()

Method Detail

isInProgress

public boolean isInProgress()

Description copied from interface: BinaryGarbageCollector

Checks if a GC is in progress.

A GC is in progress is #start has been called but not #stop.

It's only useful to call this from a separate thread from the one that calls BinaryGarbageCollector.mark(java.lang.String).

Specified by:

isInProgress in interface BinaryGarbageCollector

Returns:

true if a GC is in progress

start

public void start()

Description copied from interface: BinaryGarbageCollector

Starts the garbage collection process.

After this, all active binaries must be fed to the BinaryGarbageCollector.mark(java.lang.String) method.

Specified by:

start in interface BinaryGarbageCollector

computeToDelete

public void computeToDelete()

Computes keys candidate for deletion.

Overrides should not call super (this allows detecting old implementations).

Since:

11.5

stop

public void stop(boolean delete)

Description copied from interface: BinaryGarbageCollector

Stops the garbage collection process and deletes all binaries that have not been marked (sweep).

Specified by:

stop in interface BinaryGarbageCollector

Parameters:

delete - true if actual deletion must be performed, false if the binaries to delete should simply be counted in the status

removeUnmarkedBlobsAndUpdateStatus

public void removeUnmarkedBlobsAndUpdateStatus(boolean delete)

getUnmarkedBlobsAndUpdateStatus

public Set<String> getUnmarkedBlobsAndUpdateStatus()

removeBlobs

public void removeBlobs(Set<String> keys)

mark

public void mark(String digest)

Description copied from interface: BinaryGarbageCollector

Marks a binary as being in use.

Specified by:

mark in interface BinaryGarbageCollector

Parameters:

digest - the binary's digest

getStatus

public BinaryManagerStatus getStatus()

Description copied from interface: BinaryGarbageCollector

Gets the status of the binaries to GC and of those that won't be.

Available after BinaryGarbageCollector.stop(boolean).

Specified by:

getStatus in interface BinaryGarbageCollector

Returns:

the status