org.onosproject.store.primitives

Class DefaultConsistentMap<K,V>

java.lang.Object

org.onosproject.store.service.Synchronous<AsyncConsistentMap<K,V>>

org.onosproject.store.primitives.DefaultConsistentMap<K,V>

Type Parameters:

K - type of key.

V - type of value.

All Implemented Interfaces:

ConsistentMap<K,V>, DistributedPrimitive

public class DefaultConsistentMap<K,V>
extends Synchronous<AsyncConsistentMap<K,V>>
implements ConsistentMap<K,V>

Default implementation of ConsistentMap.

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, DEFAULT_OPERTATION_TIMEOUT_MILLIS

Constructor Summary

Constructors

Constructor and Description
DefaultConsistentMap(AsyncConsistentMap<K,V> asyncMap, long operationTimeoutMillis)

Method Summary

Modifier and Type	Method and Description
void	addListener(MapEventListener<K,V> listener, java.util.concurrent.Executor executor) Registers the specified listener to be notified whenever the map is updated.
void	addStatusChangeListener(java.util.function.Consumer<DistributedPrimitive.Status> listener) Registers a listener to be called when the primitive's status changes.
java.util.Map<K,V>	asJavaMap() Returns a java.util.Map instance backed by this ConsistentMap.
void	clear() Removes all of the mappings from this map (optional operation).
Versioned<V>	compute(K key, java.util.function.BiFunction<? super K,? super V,? extends V> remappingFunction) Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).
Versioned<V>	computeIf(K key, java.util.function.Predicate<? super V> condition, java.util.function.BiFunction<? super K,? super V,? extends V> remappingFunction) If the value for the specified key satisfies a condition, attempts to compute a new mapping given the key and its current mapped value.
Versioned<V>	computeIfAbsent(K key, java.util.function.Function<? super K,? extends V> mappingFunction) If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null.
Versioned<V>	computeIfPresent(K key, java.util.function.BiFunction<? super K,? super V,? extends V> remappingFunction) If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value.
boolean	containsKey(K key) Returns true if this map contains a mapping for the specified key.
boolean	containsValue(V value) Returns true if this map contains the specified value.
java.util.Set<java.util.Map.Entry<K,Versioned<V>>>	entrySet() Returns the set of entries contained in this map.
Versioned<V>	get(K key) Returns the value (and version) to which the specified key is mapped, or null if this map contains no mapping for the key.
Versioned<V>	getOrDefault(K key, V defaultValue) Returns the value (and version) to which the specified key is mapped, or the provided default value if this map contains no mapping for the key.
boolean	isEmpty() Returns true if the map is empty.
java.util.Set<K>	keySet() Returns a Set view of the keys contained in this map.
Versioned<V>	put(K key, V value) Associates the specified value with the specified key in this map (optional operation).
Versioned<V>	putAndGet(K key, V value) Associates the specified value with the specified key in this map (optional operation).
Versioned<V>	putIfAbsent(K key, V value) If the specified key is not already associated with a value associates it with the given value and returns null, else returns the current value.
Versioned<V>	remove(K key) Removes the mapping for a key from this map if it is present (optional operation).
boolean	remove(K key, long version) Removes the entry for the specified key only if its current version in the map is equal to the specified version.
boolean	remove(K key, V value) Removes the entry for the specified key only if it is currently mapped to the specified value.
void	removeListener(MapEventListener<K,V> listener) Unregisters the specified listener such that it will no longer receive map change notifications.
void	removeStatusChangeListener(java.util.function.Consumer<DistributedPrimitive.Status> listener) Unregisters a previously registered listener to be called when the primitive's status changes.
boolean	replace(K key, long oldVersion, V newValue) Replaces the entry for the specified key only if it is currently mapped to the specified version.
Versioned<V>	replace(K key, V value) Replaces the entry for the specified key only if there is any value which associated with specified key.
boolean	replace(K key, V oldValue, V newValue) Replaces the entry for the specified key only if currently mapped to the specified value.
int	size() Returns the number of entries in the map.
java.util.Collection<java.util.function.Consumer<DistributedPrimitive.Status>>	statusChangeListeners() Returns the collection of status change listeners previously registered.
java.lang.String	toString()
java.util.Collection<Versioned<V>>	values() Returns the collection of values (and associated versions) contained in this map.

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, wait, wait, wait

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

addListener

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

applicationId, destroy, name, primitiveType

Constructor Detail

DefaultConsistentMap

public DefaultConsistentMap(AsyncConsistentMap<K,V> asyncMap,
                            long operationTimeoutMillis)

Method Detail

size

public int size()

Description copied from interface: ConsistentMap

Returns the number of entries in the map.

Specified by:

size in interface ConsistentMap<K,V>

Returns:

map size.

isEmpty

public boolean isEmpty()

Description copied from interface: ConsistentMap

Returns true if the map is empty.

Specified by:

isEmpty in interface ConsistentMap<K,V>

Returns:

true if map has no entries, false otherwise

containsKey

public boolean containsKey(K key)

Description copied from interface: ConsistentMap

Returns true if this map contains a mapping for the specified key.

Specified by:

containsKey in interface ConsistentMap<K,V>

Parameters:

key - key

Returns:

true if map contains key, false otherwise

containsValue

public boolean containsValue(V value)

Description copied from interface: ConsistentMap

Returns true if this map contains the specified value.

Specified by:

containsValue in interface ConsistentMap<K,V>

Parameters:

value - value

Returns:

true if map contains value, false otherwise.

get

public Versioned<V> get(K key)

Description copied from interface: ConsistentMap

Returns the value (and version) to which the specified key is mapped, or null if this map contains no mapping for the key.

Specified by:

get in interface ConsistentMap<K,V>

Parameters:

key - the key whose associated value (and version) is to be returned

Returns:

the value (and version) to which the specified key is mapped, or null if this map contains no mapping for the key

getOrDefault

public Versioned<V> getOrDefault(K key,
                                 V defaultValue)

Description copied from interface: ConsistentMap

Returns the value (and version) to which the specified key is mapped, or the provided default value if this map contains no mapping for the key.

Note: a non-null Versioned value will be returned even if the defaultValue is null.

Specified by:

getOrDefault in interface ConsistentMap<K,V>

Parameters:

key - the key whose associated value (and version) is to be returned

defaultValue - the default value to return if the key is not set

Returns:

the value (and version) to which the specified key is mapped, or null if this map contains no mapping for the key

computeIfAbsent

public Versioned<V> computeIfAbsent(K key,
                                    java.util.function.Function<? super K,? extends V> mappingFunction)

Description copied from interface: ConsistentMap

If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null.

Specified by:

computeIfAbsent in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified value is to be associated

mappingFunction - the function to compute a value

Returns:

the current (existing or computed) value associated with the specified key, or null if the computed value is null. Method throws ConsistentMapException.ConcurrentModification if a concurrent modification of map is detected

computeIfPresent

public Versioned<V> computeIfPresent(K key,
                                     java.util.function.BiFunction<? super K,? super V,? extends V> remappingFunction)

Description copied from interface: ConsistentMap

If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value. If the computed value is null, the current mapping will be removed from the map.

Specified by:

computeIfPresent in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified value is to be associated

remappingFunction - the function to compute a value

Returns:

the new value associated with the specified key, or null if none. This method throws ConsistentMapException.ConcurrentModification if a concurrent modification of map is detected

compute

public Versioned<V> compute(K key,
                            java.util.function.BiFunction<? super K,? super V,? extends V> remappingFunction)

Description copied from interface: ConsistentMap

Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping). If the computed value is null, the current mapping will be removed from the map.

Specified by:

compute in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified value is to be associated

remappingFunction - the function to compute a value

Returns:

the new value associated with the specified key, or null if none. This method throws ConsistentMapException.ConcurrentModification if a concurrent modification of map is detected

computeIf

public Versioned<V> computeIf(K key,
                              java.util.function.Predicate<? super V> condition,
                              java.util.function.BiFunction<? super K,? super V,? extends V> remappingFunction)

Description copied from interface: ConsistentMap

If the value for the specified key satisfies a condition, attempts to compute a new mapping given the key and its current mapped value. If the computed value is null, the current mapping will be removed from the map.

Specified by:

computeIf in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified value is to be associated

condition - condition that should evaluate to true for the computation to proceed

remappingFunction - the function to compute a value

Returns:

the new value associated with the specified key, or the old value if condition evaluates to false. This method throws ConsistentMapException.ConcurrentModification if a concurrent modification of map is detected

put

public Versioned<V> put(K key,
                        V value)

Description copied from interface: ConsistentMap

Associates the specified value with the specified key in this map (optional operation). If the map previously contained a mapping for the key, the old value is replaced by the specified value.

Specified by:

put in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

the previous value (and version) associated with key, or null if there was no mapping for key.

putAndGet

public Versioned<V> putAndGet(K key,
                              V value)

Description copied from interface: ConsistentMap

Associates the specified value with the specified key in this map (optional operation). If the map previously contained a mapping for the key, the old value is replaced by the specified value.

Specified by:

putAndGet in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

new value.

remove

public Versioned<V> remove(K key)

Description copied from interface: ConsistentMap

Removes the mapping for a key from this map if it is present (optional operation).

Specified by:

remove in interface ConsistentMap<K,V>

Parameters:

key - key whose value is to be removed from the map

Returns:

the value (and version) to which this map previously associated the key, or null if the map contained no mapping for the key.

clear

public void clear()

Description copied from interface: ConsistentMap

Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.

Specified by:

clear in interface ConsistentMap<K,V>

keySet

public java.util.Set<K> keySet()

Description copied from interface: ConsistentMap

Returns a Set view of the keys contained in this map. This method differs from the behavior of java.util.Map.keySet() in that what is returned is a unmodifiable snapshot view of the keys in the ConsistentMap. Attempts to modify the returned set, whether direct or via its iterator, result in an UnsupportedOperationException.

Specified by:

keySet in interface ConsistentMap<K,V>

Returns:

a set of the keys contained in this map

values

public java.util.Collection<Versioned<V>> values()

Description copied from interface: ConsistentMap

Returns the collection of values (and associated versions) contained in this map. This method differs from the behavior of java.util.Map.values() in that what is returned is a unmodifiable snapshot view of the values in the ConsistentMap. Attempts to modify the returned collection, whether direct or via its iterator, result in an UnsupportedOperationException.

Specified by:

values in interface ConsistentMap<K,V>

Returns:

a collection of the values (and associated versions) contained in this map

entrySet

public java.util.Set<java.util.Map.Entry<K,Versioned<V>>> entrySet()

Description copied from interface: ConsistentMap

Returns the set of entries contained in this map. This method differs from the behavior of java.util.Map.entrySet() in that what is returned is a unmodifiable snapshot view of the entries in the ConsistentMap. Attempts to modify the returned set, whether direct or via its iterator, result in an UnsupportedOperationException.

Specified by:

entrySet in interface ConsistentMap<K,V>

Returns:

set of entries contained in this map.

putIfAbsent

public Versioned<V> putIfAbsent(K key,
                                V value)

Description copied from interface: ConsistentMap

If the specified key is not already associated with a value associates it with the given value and returns null, else returns the current value.

Specified by:

putIfAbsent in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

the previous value associated with the specified key or null if key does not already mapped to a value.

remove

public boolean remove(K key,
                      V value)

Description copied from interface: ConsistentMap

Removes the entry for the specified key only if it is currently mapped to the specified value.

Specified by:

remove in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified value is associated

value - value expected to be associated with the specified key

Returns:

true if the value was removed

remove

public boolean remove(K key,
                      long version)

Description copied from interface: ConsistentMap

Removes the entry for the specified key only if its current version in the map is equal to the specified version.

Specified by:

remove in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified version is associated

version - version expected to be associated with the specified key

Returns:

true if the value was removed

replace

public Versioned<V> replace(K key,
                            V value)

Description copied from interface: ConsistentMap

Replaces the entry for the specified key only if there is any value which associated with specified key.

Specified by:

replace in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified value is associated

value - value expected to be associated with the specified key

Returns:

the previous value associated with the specified key or null

replace

public boolean replace(K key,
                       V oldValue,
                       V newValue)

Description copied from interface: ConsistentMap

Replaces the entry for the specified key only if currently mapped to the specified value.

Specified by:

replace in interface ConsistentMap<K,V>

Parameters:

key - key with which the specified value is associated

oldValue - value expected to be associated with the specified key

newValue - value to be associated with the specified key

Returns:

true if the value was replaced

replace

public boolean replace(K key,
                       long oldVersion,
                       V newValue)

Description copied from interface: ConsistentMap

Replaces the entry for the specified key only if it is currently mapped to the specified version.

Specified by:

replace in interface ConsistentMap<K,V>

Parameters:

key - key key with which the specified value is associated

oldVersion - version expected to be associated with the specified key

newValue - value to be associated with the specified key

Returns:

true if the value was replaced

addListener

public void addListener(MapEventListener<K,V> listener,
                        java.util.concurrent.Executor executor)

Description copied from interface: ConsistentMap

Registers the specified listener to be notified whenever the map is updated.

Specified by:

addListener in interface ConsistentMap<K,V>

Parameters:

listener - listener to notify about map events

executor - executor to use for handling incoming map events

removeListener

public void removeListener(MapEventListener<K,V> listener)

Description copied from interface: ConsistentMap

Unregisters the specified listener such that it will no longer receive map change notifications.

Specified by:

removeListener in interface ConsistentMap<K,V>

Parameters:

listener - listener to unregister

addStatusChangeListener

public void addStatusChangeListener(java.util.function.Consumer<DistributedPrimitive.Status> listener)

Description copied from interface: DistributedPrimitive

Registers a listener to be called when the primitive's status changes.

Specified by:

addStatusChangeListener in interface DistributedPrimitive

Parameters:

listener - The listener to be called when the status changes.

removeStatusChangeListener

public void removeStatusChangeListener(java.util.function.Consumer<DistributedPrimitive.Status> listener)

Description copied from interface: DistributedPrimitive

Unregisters a previously registered listener to be called when the primitive's status changes.

Specified by:

removeStatusChangeListener in interface DistributedPrimitive

Parameters:

listener - The listener to unregister

statusChangeListeners

public java.util.Collection<java.util.function.Consumer<DistributedPrimitive.Status>> statusChangeListeners()

Description copied from interface: DistributedPrimitive

Returns the collection of status change listeners previously registered.

Specified by:

statusChangeListeners in interface DistributedPrimitive

Returns:

collection of status change listeners

asJavaMap

public java.util.Map<K,V> asJavaMap()

Description copied from interface: ConsistentMap

Returns a java.util.Map instance backed by this ConsistentMap.

Specified by:

asJavaMap in interface ConsistentMap<K,V>

Returns:

java.util.Map

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object