org.onosproject.store.primitives

Class DefaultDocumentTree<V>

java.lang.Object

org.onosproject.store.service.Synchronous<AsyncDocumentTree<V>>

org.onosproject.store.primitives.DefaultDocumentTree<V>

Type Parameters:

V - the type of the values

All Implemented Interfaces:

DistributedPrimitive, DocumentTree<V>

public class DefaultDocumentTree<V>
extends Synchronous<AsyncDocumentTree<V>>
implements DocumentTree<V>

Synchronous wrapper for a AsyncDocumentTree. All operations are made by making the equivalent calls to a backing AsyncDocumentTree then blocking until the operations complete or timeout.

Nested Class Summary

Nested classes/interfaces inherited from interface org.onosproject.store.service.DistributedPrimitive

DistributedPrimitive.Status, DistributedPrimitive.Type

Field Summary

Fields inherited from interface org.onosproject.store.service.DistributedPrimitive

DEFAULT_OPERATION_TIMEOUT_MILLIS

Constructor Summary

Constructors

Constructor and Description
DefaultDocumentTree(AsyncDocumentTree<V> backingTree, long operationTimeoutMillis)

Method Summary

Modifier and Type	Method and Description
void	addListener(DocumentPath path, DocumentTreeListener<V> listener) Registers a listener to be notified when a subtree rooted at the specified path is modified.
void	addListener(DocumentTreeListener<V> listener) Registers a listener to be notified when the tree is modified.
boolean	create(DocumentPath path, V value) Creates a document tree node if one does not exist already.
boolean	createRecursive(DocumentPath path, V value) Creates a document tree node by first creating any missing intermediate nodes in the path.
Versioned<V>	get(DocumentPath path) Returns a document tree node.
Map<String,Versioned<V>>	getChildren(DocumentPath path) Returns the child values for this node.
void	removeListener(DocumentTreeListener<V> listener) Unregisters a previously added listener.
Versioned<V>	removeNode(DocumentPath path) Removes the node with the specified path.
boolean	replace(DocumentPath path, V newValue, long version) Conditionally updates a tree node if the current version matches a specified version.
boolean	replace(DocumentPath path, V newValue, V currentValue) Conditionally updates a tree node if the current value matches a specified value.
DocumentPath	root() Returns the path to root of the tree.
Versioned<V>	set(DocumentPath path, V value) Creates or updates a document tree node.

Methods inherited from class org.onosproject.store.service.Synchronous

destroy, name, primitiveType

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.onosproject.store.service.DocumentTree

primitiveType

Methods inherited from interface org.onosproject.store.service.DistributedPrimitive

addStatusChangeListener, applicationId, destroy, name, removeStatusChangeListener, statusChangeListeners

Constructor Detail

DefaultDocumentTree

public DefaultDocumentTree(AsyncDocumentTree<V> backingTree,
                           long operationTimeoutMillis)

Method Detail

root

public DocumentPath root()

Description copied from interface: DocumentTree

Returns the path to root of the tree.

Specified by:

root in interface DocumentTree<V>

Returns:

path to root of the tree

getChildren

public Map<String,Versioned<V>> getChildren(DocumentPath path)

Description copied from interface: DocumentTree

Returns the child values for this node.

Specified by:

getChildren in interface DocumentTree<V>

Parameters:

path - path to the node

Returns:

mapping from a child name to its value

get

public Versioned<V> get(DocumentPath path)

Description copied from interface: DocumentTree

Returns a document tree node.

Specified by:

get in interface DocumentTree<V>

Parameters:

path - path to node

Returns:

node value or null if path does not point to a valid node

set

public Versioned<V> set(DocumentPath path,
                        V value)

Description copied from interface: DocumentTree

Creates or updates a document tree node.

Specified by:

set in interface DocumentTree<V>

Parameters:

path - path for the node to create or update

value - the non-null value to be associated with the key

Returns:

the previous mapping or null if there was no previous mapping

create

public boolean create(DocumentPath path,
                      V value)

Description copied from interface: DocumentTree

Creates a document tree node if one does not exist already.

Specified by:

create in interface DocumentTree<V>

Parameters:

path - path for the node to create

value - the non-null value to be associated with the key

Returns:

returns true if the mapping could be added successfully, false otherwise

createRecursive

public boolean createRecursive(DocumentPath path,
                               V value)

Description copied from interface: DocumentTree

Creates a document tree node by first creating any missing intermediate nodes in the path.

Specified by:

createRecursive in interface DocumentTree<V>

Parameters:

path - path for the node to create

value - the non-null value to be associated with the key

Returns:

returns true if the mapping could be added successfully, false if a node already exists at that path

replace

public boolean replace(DocumentPath path,
                       V newValue,
                       long version)

Description copied from interface: DocumentTree

Conditionally updates a tree node if the current version matches a specified version.

Specified by:

replace in interface DocumentTree<V>

Parameters:

path - path for the node to create

newValue - the non-null value to be associated with the key

version - current version of the value for update to occur

Returns:

returns true if the update was made and the tree was modified, false otherwise

replace

public boolean replace(DocumentPath path,
                       V newValue,
                       V currentValue)

Description copied from interface: DocumentTree

Conditionally updates a tree node if the current value matches a specified value.

Specified by:

replace in interface DocumentTree<V>

Parameters:

path - path for the node to create

newValue - the non-null value to be associated with the key

currentValue - current value for update to occur

Returns:

returns true if the update was made and the tree was modified, false otherwise. This method returns false if the newValue and currentValue are same.

removeNode

public Versioned<V> removeNode(DocumentPath path)

Description copied from interface: DocumentTree

Removes the node with the specified path.

Specified by:

removeNode in interface DocumentTree<V>

Parameters:

path - path for the node to remove

Returns:

the previous value of the node or null if it did not exist

addListener

public void addListener(DocumentPath path,
                        DocumentTreeListener<V> listener)

Description copied from interface: DocumentTree

Registers a listener to be notified when a subtree rooted at the specified path is modified.

Specified by:

addListener in interface DocumentTree<V>

Parameters:

path - path to root of subtree to monitor for updates

listener - listener to be notified

removeListener

public void removeListener(DocumentTreeListener<V> listener)

Description copied from interface: DocumentTree

Unregisters a previously added listener.

Specified by:

removeListener in interface DocumentTree<V>

Parameters:

listener - listener to unregister

addListener

public void addListener(DocumentTreeListener<V> listener)

Description copied from interface: DocumentTree

Registers a listener to be notified when the tree is modified.

Specified by:

addListener in interface DocumentTree<V>

Parameters:

listener - listener to be notified