com.apple.foundationdb.record.provider.foundationdb.layers.interning

Class ScopedInterningLayer

java.lang.Object

com.apple.foundationdb.record.provider.foundationdb.keyspace.LocatableResolver

com.apple.foundationdb.record.provider.foundationdb.layers.interning.ScopedInterningLayer

@API(value=MAINTAINED)
public class ScopedInterningLayer
extends LocatableResolver

An implementation of LocatableResolver that is backed by the StringInterningLayer.

Nested Class Summary

Nested classes/interfaces inherited from class com.apple.foundationdb.record.provider.foundationdb.keyspace.LocatableResolver

LocatableResolver.LocatableResolverLockedException

Field Summary

Fields inherited from class com.apple.foundationdb.record.provider.foundationdb.keyspace.LocatableResolver

database, hashCode, location

Constructor Summary

Constructors

Constructor and Description
ScopedInterningLayer(FDBDatabase database, ResolvedKeySpacePath path) Creates a resolver rooted at the provided KeySpacePath.
ScopedInterningLayer(FDBRecordContext context, KeySpacePath path) Deprecated. use ScopedInterningLayer(FDBDatabase, ResolvedKeySpacePath) instead

Method Summary

Modifier and Type	Method and Description
protected CompletableFuture<ResolverResult>	create(FDBRecordContext context, String key, byte[] metadata)
ResolverResult	deserializeValue(byte[] value) Deserialize the raw bytes value stored in the mapping subspace.
CompletableFuture<Subspace>	getBaseSubspaceAsync() Get a CompletableFuture that will contain the Subspace this resolver is rooted at (e.g.
CompletableFuture<Subspace>	getMappingSubspaceAsync() Get a CompletableFuture that will contain the Subspace where this resolver stores the mappings from key Strings to value Long.
protected CompletableFuture<Subspace>	getStateSubspaceAsync()
static ScopedInterningLayer	global(FDBDatabase database) Creates a default instance of the scoped interning layer.
protected CompletableFuture<Optional<ResolverResult>>	read(FDBRecordContext context, String key)
protected CompletableFuture<Optional<String>>	readReverse(FDBStoreTimer timer, Long value)
CompletableFuture<Void>	setMapping(FDBRecordContext context, String key, ResolverResult value)
CompletableFuture<Void>	setWindow(long count)
CompletableFuture<Void>	updateMetadata(FDBRecordContext context, String key, byte[] metadata)

Methods inherited from class com.apple.foundationdb.record.provider.foundationdb.keyspace.LocatableResolver

create, disableWriteLock, enableWriteLock, equals, exclusiveLock, getBaseSubspace, getDatabase, getMappingSubspace, getVersion, hashCode, incrementVersion, mustResolve, mustResolveWithMetadata, resolve, resolve, resolveWithMetadata, retired, retiredSkipCache, retireLayer, reverseLookup, setMapping, toString, updateMetadataAndVersion, wrap

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ScopedInterningLayer

@Deprecated
 @API(value=DEPRECATED)
public ScopedInterningLayer(@Nonnull
                                                                FDBRecordContext context,
                                                                @Nonnull
                                                                KeySpacePath path)

Deprecated. use ScopedInterningLayer(FDBDatabase, ResolvedKeySpacePath) instead

Creates a resolver rooted at the provided KeySpacePath.

Parameters:

context - context used to resolve the provided path. This context is only used during the construction of this class and at no other point

path - the KeySpacePath where this resolver is rooted

ScopedInterningLayer

public ScopedInterningLayer(@Nonnull
                            FDBDatabase database,
                            @Nonnull
                            ResolvedKeySpacePath path)

Creates a resolver rooted at the provided KeySpacePath.

Parameters:

database - database that will be used when resolving values

path - the ResolvedKeySpacePath where this resolver is rooted

Method Detail

global

public static ScopedInterningLayer global(@Nonnull
                                          FDBDatabase database)

Creates a default instance of the scoped interning layer.

Parameters:

database - the FDBDatabase for this resolver

Returns:

the global ScopedInterningLayer for this database

read

protected CompletableFuture<Optional<ResolverResult>> read(@Nonnull
                                                           FDBRecordContext context,
                                                           String key)

Specified by:

read in class LocatableResolver

create

protected CompletableFuture<ResolverResult> create(@Nonnull
                                                   FDBRecordContext context,
                                                   @Nonnull
                                                   String key,
                                                   @Nullable
                                                   byte[] metadata)

Specified by:

create in class LocatableResolver

readReverse

protected CompletableFuture<Optional<String>> readReverse(FDBStoreTimer timer,
                                                          Long value)

Specified by:

readReverse in class LocatableResolver

setMapping

public CompletableFuture<Void> setMapping(FDBRecordContext context,
                                          String key,
                                          ResolverResult value)

Specified by:

setMapping in class LocatableResolver

updateMetadata

public CompletableFuture<Void> updateMetadata(@Nonnull
                                              FDBRecordContext context,
                                              @Nonnull
                                              String key,
                                              @Nullable
                                              byte[] metadata)

Specified by:

updateMetadata in class LocatableResolver

setWindow

public CompletableFuture<Void> setWindow(long count)

Specified by:

setWindow in class LocatableResolver

getStateSubspaceAsync

protected CompletableFuture<Subspace> getStateSubspaceAsync()

Specified by:

getStateSubspaceAsync in class LocatableResolver

getMappingSubspaceAsync

@Nonnull
public CompletableFuture<Subspace> getMappingSubspaceAsync()

Description copied from class: LocatableResolver

Get a CompletableFuture that will contain the Subspace where this resolver stores the mappings from key Strings to value Long. Direct access to this subspace is not needed by general users and extreme care should be taken when interacting with it.

Specified by:

getMappingSubspaceAsync in class LocatableResolver

Returns:

a future that, when ready, will hold the mapping subspace

getBaseSubspaceAsync

@Nonnull
public CompletableFuture<Subspace> getBaseSubspaceAsync()

Description copied from class: LocatableResolver

Get a CompletableFuture that will contain the Subspace this resolver is rooted at (e.g. the global resolver ExtendedDirectoryLayer.global(FDBDatabase) has a base subspace at the root of the FDB keyspace. Note that this is not the subspace where the resolver maintains its allocation keys (see LocatableResolver.getMappingSubspaceAsync()).

Specified by:

getBaseSubspaceAsync in class LocatableResolver

Returns:

a future that, when ready, will hold the base subspace

deserializeValue

@Nonnull
public ResolverResult deserializeValue(byte[] value)

Description copied from class: LocatableResolver

Deserialize the raw bytes value stored in the mapping subspace.

Specified by:

deserializeValue in class LocatableResolver

Parameters:

value - raw value bytes.

Returns:

the deserialized ResolverResult.