Package io.camunda.zeebe.snapshots.impl

Class FileBasedSnapshotStoreFactory

java.lang.Object

io.camunda.zeebe.snapshots.impl.FileBasedSnapshotStoreFactory

All Implemented Interfaces:

ReceivableSnapshotStoreFactory

public final class FileBasedSnapshotStoreFactory
extends Object
implements ReceivableSnapshotStoreFactory

Loads existing snapshots in memory, cleaning out old and/or invalid snapshots if present.

The current load strategy is to lookup all files directly under the SNAPSHOTS_DIRECTORY, try to extract FileBasedSnapshotId from them, and if not possible skip them (and print out a warning).

The metadata extraction is done by parsing the directory name using '%d-%d-%d-%d', where in order we expect: index, term, processed position and exported position.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	PENDING_DIRECTORY
static final String	SNAPSHOTS_DIRECTORY

Constructor Summary

Constructors

Constructor	Description
FileBasedSnapshotStoreFactory(ActorSchedulingService actorScheduler, int nodeId)

Method Summary

Modifier and Type	Method	Description
ReceivableSnapshotStore	createReceivableSnapshotStore(Path root, int partitionId)	Creates a snapshot store operating in the given directory.
static RestorableSnapshotStore	createRestorableSnapshotStore(Path root, int partitionId, int nodeId)
ConstructableSnapshotStore	getConstructableSnapshotStore(int partitionId)
PersistedSnapshotStore	getPersistedSnapshotStore(int partitionId)
ReceivableSnapshotStore	getReceivableSnapshotStore(int partitionId)
ConcurrencyControl	getSnapshotStoreConcurrencyControl(int partitionId)	Deprecated.

Methods inherited from class java.lang.Object

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

Field Details

SNAPSHOTS_DIRECTORY

public static final String SNAPSHOTS_DIRECTORY

See Also:

• Constant Field Values

PENDING_DIRECTORY

public static final String PENDING_DIRECTORY

See Also:

• Constant Field Values

Constructor Details

FileBasedSnapshotStoreFactory

public FileBasedSnapshotStoreFactory(ActorSchedulingService actorScheduler,
 int nodeId)

Method Details

createRestorableSnapshotStore

public static RestorableSnapshotStore createRestorableSnapshotStore(Path root,
 int partitionId,
 int nodeId)

createReceivableSnapshotStore

public ReceivableSnapshotStore createReceivableSnapshotStore(Path root,
 int partitionId)

Description copied from interface: ReceivableSnapshotStoreFactory

Creates a snapshot store operating in the given directory.

Specified by:

createReceivableSnapshotStore in interface ReceivableSnapshotStoreFactory

Parameters:

root - the root directory where snapshots should be stored

partitionId - the id of the partition for this store

Returns:

a new PersistedSnapshotStore

getConstructableSnapshotStore

public ConstructableSnapshotStore getConstructableSnapshotStore(int partitionId)

getReceivableSnapshotStore

public ReceivableSnapshotStore getReceivableSnapshotStore(int partitionId)

getPersistedSnapshotStore

public PersistedSnapshotStore getPersistedSnapshotStore(int partitionId)

getSnapshotStoreConcurrencyControl

@Deprecated
public ConcurrencyControl getSnapshotStoreConcurrencyControl(int partitionId)

Deprecated.

Return the same concurrent control (actor) that is used by the snapshot store of the given partition

Parameters:

partitionId -

Returns:

concurrency control