Package io.permazen.kv.spanner

Class SpannerKVImplementation

java.lang.Object

io.permazen.kv.spanner.SpannerKVImplementation

All Implemented Interfaces:

KVImplementation<SpannerKVImplementation.Config>

public class SpannerKVImplementation
extends Object
implements KVImplementation<SpannerKVImplementation.Config>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SpannerKVImplementation.Config

Constructor Summary

Constructors

Constructor	Description
SpannerKVImplementation()

Method Summary

Modifier and Type	Method	Description
void	addOptions(joptsimple.OptionParser parser)	Add implementation-specific command line options.
SpannerKVImplementation.Config	buildConfig(joptsimple.OptionSet options)	Build a configuration from implementation-specific command line options, if any were given.
SpannerKVDatabase	createKVDatabase(SpannerKVImplementation.Config config, KVDatabase kvdb, AtomicKVStore kvstore)	Create an KVDatabase using the specified configuration.
String	getDescription(SpannerKVImplementation.Config config)	Generate a short, human-readable description of the KVDatabase instance configured as given.
boolean	providesKVDatabase(SpannerKVImplementation.Config config)	Determine whether this KVImplementation includes an implementation of the KVDatabase interface.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.permazen.kv.KVImplementation

createAtomicKVStore, getConfigType, providesAtomicKVStore, requiresAtomicKVStore, requiresKVDatabase

Constructor Details

SpannerKVImplementation

public SpannerKVImplementation()

Method Details

addOptions

public void addOptions(joptsimple.OptionParser parser)

Description copied from interface: KVImplementation

Add implementation-specific command line options.

All of the added options must be optional, because multiple key/value implementations will be available when the command line is parsed, and the presence of implementation-specific options determines which one(s) are chosen.

Specified by:

addOptions in interface KVImplementation<SpannerKVImplementation.Config>

Parameters:

parser - command line flag parser

buildConfig

public SpannerKVImplementation.Config buildConfig(joptsimple.OptionSet options)

Description copied from interface: KVImplementation

Build a configuration from implementation-specific command line options, if any were given.

If none of this implementation's options were provided, then this method must return null.

Specified by:

buildConfig in interface KVImplementation<SpannerKVImplementation.Config>

Parameters:

options - parsed command line options

Returns:

corresponding configuration, or null if this implementation was not configured

providesKVDatabase

public boolean providesKVDatabase(SpannerKVImplementation.Config config)

Description copied from interface: KVImplementation

Determine whether this KVImplementation includes an implementation of the KVDatabase interface.

The implementation in KVImplementation return false.

Specified by:

providesKVDatabase in interface KVImplementation<SpannerKVImplementation.Config>

Parameters:

config - implementation configuration returned by buildConfig()

Returns:

true if this instance can create an KVDatabase

createKVDatabase

public SpannerKVDatabase createKVDatabase(SpannerKVImplementation.Config config,
 KVDatabase kvdb,
 AtomicKVStore kvstore)

Description copied from interface: KVImplementation

Create an KVDatabase using the specified configuration.

The implementation in KVImplementation always throws UnsupportedOperationException.

Specified by:

createKVDatabase in interface KVImplementation<SpannerKVImplementation.Config>

Parameters:

config - implementation configuration returned by buildConfig()

kvdb - required KVDatabase; will be null unless KVImplementation.requiresKVDatabase(C) returned true

kvstore - required AtomicKVStore; will be null unless KVImplementation.requiresAtomicKVStore(C) returned true

Returns:

new KVDatabase instance

getDescription

public String getDescription(SpannerKVImplementation.Config config)

Description copied from interface: KVImplementation

Generate a short, human-readable description of the KVDatabase instance configured as given.

Specified by:

getDescription in interface KVImplementation<SpannerKVImplementation.Config>

Parameters:

config - implementation configuration returned by buildConfig()

Returns:

human-readable description