Package com.atlassian.confluence.internal.index.lucene.snapshot

Class DefaultLuceneIndexSnapshotManager

java.lang.Object

com.atlassian.confluence.internal.index.lucene.snapshot.DefaultLuceneIndexSnapshotManager

All Implemented Interfaces:

LuceneIndexSnapshotManager

public class DefaultLuceneIndexSnapshotManager
extends Object
implements LuceneIndexSnapshotManager

Manage all Lucene index snapshots. In DC, all index snapshots are stored under shared-home/index-snapshots. There is a limit of how many snapshots are retained at any time for an index. The default is 3. Exceeded snapshots are regularly purged by LuceneIndexSnapshotCleaner.

Since:

7.6.0

Constructor Summary

Constructors

Constructor	Description
DefaultLuceneIndexSnapshotManager(com.atlassian.plugin.PluginAccessor pluginAccessor, BootstrapManager bootstrapManager, com.atlassian.dc.filestore.api.compat.FilesystemPath sharedHome, JournalStateStore journalStateStore)
DefaultLuceneIndexSnapshotManager(com.atlassian.plugin.PluginAccessor pluginAccessor, BootstrapManager bootstrapManager, com.atlassian.dc.filestore.api.compat.FilesystemPath sharedHome, JournalStateStore journalStateStore, Function<Path,Optional<Long>> indexVersionReader)

Method Summary

Modifier and Type	Method	Description
LuceneIndexSnapshot	create(JournalIdentifier journalIdentifier)	Create a new Lucene index snapshot for given journal (index)
void	delete(LuceneIndexSnapshot snapshot)	Delete an index snapshot from file system.
Optional<LuceneIndexSnapshot>	find(JournalIdentifier journalIdentifier, long journalEntryId)	Find a specific index snapshot corresponding to a journal entry ID.
Optional<LuceneIndexSnapshot>	find(JournalIdentifier journalIdentifier, long journalEntryId, long timeoutMs)	Find a specific index snapshot corresponding to a journal entry ID.
List<LuceneIndexSnapshot>	findForJournal(JournalIdentifier journalIdentifier)
Optional<Path>	getFile(LuceneIndexSnapshot snapshot)	Obtain location of an index snapshot.
void	restore(LuceneIndexSnapshot snapshot)	Restore a Lucene snapshot for given journal (index) to the current node

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultLuceneIndexSnapshotManager

public DefaultLuceneIndexSnapshotManager(com.atlassian.plugin.PluginAccessor pluginAccessor,
                                         BootstrapManager bootstrapManager,
                                         com.atlassian.dc.filestore.api.compat.FilesystemPath sharedHome,
                                         JournalStateStore journalStateStore)

DefaultLuceneIndexSnapshotManager

public DefaultLuceneIndexSnapshotManager(com.atlassian.plugin.PluginAccessor pluginAccessor,
                                         BootstrapManager bootstrapManager,
                                         com.atlassian.dc.filestore.api.compat.FilesystemPath sharedHome,
                                         JournalStateStore journalStateStore,
                                         Function<Path,Optional<Long>> indexVersionReader)

Method Detail

create

public LuceneIndexSnapshot create(JournalIdentifier journalIdentifier)

Description copied from interface: LuceneIndexSnapshotManager

Create a new Lucene index snapshot for given journal (index)

Specified by:

create in interface LuceneIndexSnapshotManager

Parameters:

journalIdentifier - Identifier of a journal of which a snapshot will be created

Returns:

newly created snapshot, its content can be accessed by LuceneIndexSnapshotManager.getFile(LuceneIndexSnapshot)

restore

public void restore(LuceneIndexSnapshot snapshot)

Description copied from interface: LuceneIndexSnapshotManager

Restore a Lucene snapshot for given journal (index) to the current node

Specified by:

restore in interface LuceneIndexSnapshotManager

Parameters:

snapshot - snapshot to restore

findForJournal

public List<LuceneIndexSnapshot> findForJournal(JournalIdentifier journalIdentifier)

Specified by:

findForJournal in interface LuceneIndexSnapshotManager

Returns:

all snapshots created for given journal (index) in chronological order (desc)

find

public Optional<LuceneIndexSnapshot> find(JournalIdentifier journalIdentifier,
                                          long journalEntryId)

Description copied from interface: LuceneIndexSnapshotManager

Find a specific index snapshot corresponding to a journal entry ID. This method returns immediately. Note: In certain network filesystem it may take a while after a snapshot file is created by a node until it is visible to other nodes. If you want to find a newly created snapshot and wait until it becomes visible, use LuceneIndexSnapshotManager.find(JournalIdentifier, long, long)

Specified by:

find in interface LuceneIndexSnapshotManager

Parameters:

journalIdentifier - Identifier of a journal of which a snapshot will be created

journalEntryId - place in journal when snapshot was created

find

public Optional<LuceneIndexSnapshot> find(JournalIdentifier journalIdentifier,
                                          long journalEntryId,
                                          long timeoutMs)
                                   throws InterruptedException

Description copied from interface: LuceneIndexSnapshotManager

Find a specific index snapshot corresponding to a journal entry ID. If it cannot be found immediately then this method will wait until it becomes visible or certain time has passed.

Specified by:

find in interface LuceneIndexSnapshotManager

Parameters:

journalIdentifier - Identifier of a journal of which a snapshot will be created

journalEntryId - place in journal when snapshot was created

timeoutMs - max time to wait until the snapshot file is available

Returns:

Location of the zipped snapshot in file system if found within waitTimeMs or empty

Throws:

InterruptedException

delete

public void delete(LuceneIndexSnapshot snapshot)
            throws IOException

Description copied from interface: LuceneIndexSnapshotManager

Delete an index snapshot from file system. Do nothing if the snapshot doesn't exist

Specified by:

delete in interface LuceneIndexSnapshotManager

Parameters:

snapshot - The snapshot to be deleted

Throws:

IOException - If there is error deleting the snapshot file

getFile

public Optional<Path> getFile(LuceneIndexSnapshot snapshot)

Description copied from interface: LuceneIndexSnapshotManager

Obtain location of an index snapshot.

Specified by:

getFile in interface LuceneIndexSnapshotManager

Parameters:

snapshot - Index snapshot to be accessed

Returns:

Location of the zipped snapshot in file system