org.apache.jackrabbit.oak.plugins.document

Class VersionGCSupport

java.lang.Object

org.apache.jackrabbit.oak.plugins.document.VersionGCSupport

Direct Known Subclasses:

MongoVersionGCSupport, RDBVersionGCSupport

public class VersionGCSupport
extends Object

Constructor Summary

Constructors

Constructor and Description
VersionGCSupport(DocumentStore store)

Method Summary

Modifier and Type	Method and Description
protected SplitDocumentCleanUp	createCleanUp(Set<NodeDocument.SplitDocType> gcTypes, RevisionVector sweepRevs, long oldestRevTimeStamp, VersionGarbageCollector.VersionGCStats stats)
long	getDeletedOnceCount()
@NotNull DocumentStore	getDocumentStore() Returns the underlying document store.
long	getOldestDeletedOnceTimestamp(Clock clock, long precisionMs) Retrieve the time of the oldest document marked as 'deletedOnce'.
Iterable<NodeDocument>	getPossiblyDeletedDocs(long fromModified, long toModified) Returns documents that have a NodeDocument.MODIFIED_IN_SECS value within the given range and the NodeDocument.DELETED set to true.
protected Iterable<NodeDocument>	identifyGarbage(Set<NodeDocument.SplitDocType> gcTypes, RevisionVector sweepRevs, long oldestRevTimeStamp)
protected static boolean	isDefaultNoBranchSplitNewerThan(NodeDocument doc, RevisionVector sweepRevs) Returns true if the given document is of type NodeDocument.SplitDocType.DEFAULT_NO_BRANCH and the most recent change on the document is newer than the sweepRevs.

Methods inherited from class java.lang.Object

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

Constructor Detail

VersionGCSupport

public VersionGCSupport(DocumentStore store)

Method Detail

getPossiblyDeletedDocs

public Iterable<NodeDocument> getPossiblyDeletedDocs(long fromModified,
                                                     long toModified)

Returns documents that have a NodeDocument.MODIFIED_IN_SECS value within the given range and the NodeDocument.DELETED set to true. The two passed modified timestamps are in milliseconds since the epoch and the implementation will convert them to seconds at the granularity of the NodeDocument.MODIFIED_IN_SECS field and then perform the comparison.

Parameters:

fromModified - the lower bound modified timestamp (inclusive)

toModified - the upper bound modified timestamp (exclusive)

Returns:

matching documents.

getDocumentStore

@NotNull
public @NotNull DocumentStore getDocumentStore()

Returns the underlying document store.

Returns:

the underlying document store.

createCleanUp

protected SplitDocumentCleanUp createCleanUp(Set<NodeDocument.SplitDocType> gcTypes,
                                             RevisionVector sweepRevs,
                                             long oldestRevTimeStamp,
                                             VersionGarbageCollector.VersionGCStats stats)

identifyGarbage

protected Iterable<NodeDocument> identifyGarbage(Set<NodeDocument.SplitDocType> gcTypes,
                                                 RevisionVector sweepRevs,
                                                 long oldestRevTimeStamp)

getOldestDeletedOnceTimestamp

public long getOldestDeletedOnceTimestamp(Clock clock,
                                          long precisionMs)

Retrieve the time of the oldest document marked as 'deletedOnce'.

Parameters:

precisionMs - the exact time may vary by given precision

Returns:

the timestamp of the oldest document marked with 'deletecOnce', module given prevision. If no such document exists, returns the max time inspected (close to current time).

getDeletedOnceCount

public long getDeletedOnceCount()
                         throws UnsupportedOperationException

Throws:

UnsupportedOperationException

isDefaultNoBranchSplitNewerThan

protected static boolean isDefaultNoBranchSplitNewerThan(NodeDocument doc,
                                                         RevisionVector sweepRevs)

Returns true if the given document is of type NodeDocument.SplitDocType.DEFAULT_NO_BRANCH and the most recent change on the document is newer than the sweepRevs.

Parameters:

doc - the document to check.

sweepRevs - the current sweep revisions.

Returns:

true if the document is a NodeDocument.SplitDocType.DEFAULT_NO_BRANCH and it is newer than sweepRevs; false otherwise.