co.cask.cdap.store

Class DefaultNamespaceStore

java.lang.Object

co.cask.cdap.store.DefaultNamespaceStore

All Implemented Interfaces:

NamespaceStore

public class DefaultNamespaceStore
extends Object
implements NamespaceStore

Default implementation for NamespaceStore.

Method Summary

Methods

Modifier and Type	Method and Description
NamespaceMeta	create(NamespaceMeta metadata) Creates a new namespace.
NamespaceMeta	delete(Id.Namespace id) Deletes a namespace from the namespace metadata store.
NamespaceMeta	get(Id.Namespace id) Retrieves a namespace from the namespace metadata store.
List<NamespaceMeta>	list() Lists all registered namespaces.
void	update(NamespaceMeta metadata) Updates the namespace meta.

Methods inherited from class java.lang.Object

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

Method Detail

create

@Nullable
public NamespaceMeta create(NamespaceMeta metadata)

Description copied from interface: NamespaceStore

Creates a new namespace.

Specified by:

create in interface NamespaceStore

Parameters:

metadata - NamespaceMeta representing the namespace metadata

Returns:

existing NamespaceMeta if a namespace with the specified name existed already, null if the a namespace with the specified name did not exist, and was created successfully These semantics of return type are borrowed from ConcurrentHashMap.putIfAbsent(K, V)

update

public void update(NamespaceMeta metadata)

Description copied from interface: NamespaceStore

Updates the namespace meta.

Specified by:

update in interface NamespaceStore

Parameters:

metadata - NamespaceMeta representing the namespace metadata

get

@Nullable
public NamespaceMeta get(Id.Namespace id)

Description copied from interface: NamespaceStore

Retrieves a namespace from the namespace metadata store.

Specified by:

get in interface NamespaceStore

Parameters:

id - Id.Namespace of the requested namespace

Returns:

NamespaceMeta of the requested namespace

delete

@Nullable
public NamespaceMeta delete(Id.Namespace id)

Description copied from interface: NamespaceStore

Deletes a namespace from the namespace metadata store.

Specified by:

delete in interface NamespaceStore

Parameters:

id - Id.Namespace of the namespace to delete

Returns:

NamespaceMeta of the namespace if it was found and deleted, null if the specified namespace did not exist These semantics of return type are borrowed from ConcurrentHashMap.remove(java.lang.Object)

list

public List<NamespaceMeta> list()

Description copied from interface: NamespaceStore

Lists all registered namespaces.

Specified by:

list in interface NamespaceStore

Returns:

a list of all registered namespaces