Package io.atomix.client.map

Interface AsyncDistributedMultimap<K,V>

All Superinterfaces:
AsyncPrimitive, DistributedPrimitive
public interface AsyncDistributedMultimap<K,V> extends AsyncPrimitive
Interface for a distributed multimap.

NOTE: Editing any returned collection will NOT effect the map itself and changes in the map will NOT be reflected in the returned collections. Certain operations may be too expensive when backed by a distributed data structure and have been labeled as such.

  • Method Details

    • size

      CompletableFuture<Integer> size()
      Returns the number of key-value pairs in this multimap.
      Returns:
      the number of key-value pairs

    • isEmpty

      CompletableFuture<Boolean> isEmpty()
      Returns if this multimap contains no key-value pairs.
      Returns:
      completable future that will be true if no key-value pairs exist, false otherwise

    • containsKey

      CompletableFuture<Boolean> containsKey(K key)
      Returns true if there is at lease one key-value pair with a key equal to key.
      Parameters:
      key - the key to query
      Returns:
      a future whose value will be true if the map contains a key-value pair with key false otherwise

    • containsValue

      CompletableFuture<Boolean> containsValue(V value)
      Returns true if this map contains at lease one key-value pair with a value equal to value.
      Parameters:
      value - the value to query
      Returns:
      a future whose value will be true if there is a key-value pair with the specified value, false otherwise.

    • containsEntry

      CompletableFuture<Boolean> containsEntry(K key, V value)
      Returns true if this map contains at least one key-value pair with key and value specified.
      Parameters:
      key - key
      value - value
      Returns:
      a future whose value will be true if there is a key-value pair with the specified key and value, false otherwise.

    • put

      CompletableFuture<Boolean> put(K key, V value)
      If the key-value pair does not already exist adds either the key value pair or the value to the set of values associated with the key and returns true, if the key-value pair already exists then behavior is implementation specific with some implementations allowing duplicates and others ignoring put requests for existing entries.
      Parameters:
      key - the key to add
      value - the value to add
      Returns:
      a future whose value will be true if the map has changed because of this call, false otherwise

    • remove

      CompletableFuture<Boolean> remove(K key, V value)
      Removes the key-value pair with the specified values if it exists. In implementations that allow duplicates which matching entry will be removed is undefined.
      Parameters:
      key - the key of the pair to be removed
      value - the value of the pair to be removed
      Returns:
      a future whose value will be true if the map changed because of this call, false otherwise.

    • removeAll

      CompletableFuture<Boolean> removeAll(K key, Collection<? extends V> values)
      Removes the key-value pairs with the specified key and values if they exist. In implementations that allow duplicates each instance of a key will remove one matching entry, which one is not defined. Equivalent to repeated calls to remove() for each key value pair but more efficient.
      Parameters:
      key - the key of the pair to be removed
      values - the set of values to be removed
      Returns:
      a future whose value will be true if the map changes because of this call, false otherwise.

    • removeAll

      CompletableFuture<Collection<V>> removeAll(K key)
      Removes all values associated with the specified key as well as the key itself.
      Parameters:
      key - the key whose key-value pairs will be removed
      Returns:
      a future whose value is the set of values that were removed, which may be empty, if the values did not exist the version will be less than one.

    • putAll

      CompletableFuture<Boolean> putAll(K key, Collection<? extends V> values)
      Adds the set of key-value pairs of the specified key with each of the values in the iterable if each key-value pair does not already exist, if the pair does exist the behavior is implementation specific. (Same as repeated puts but with efficiency gains.)
      Parameters:
      key - the key to use for all pairs to be added
      values - the set of values to be added in pairs with the key
      Returns:
      a future whose value will be true if any change in the map results from this call, false otherwise

    • replaceValues

      CompletableFuture<Collection<V>> replaceValues(K key, Collection<V> values)
      Stores all the values in values associated with the key specified, removes all preexisting values and returns a collection of the removed values which may be empty if the entry did not exist.
      Parameters:
      key - the key for all entries to be added
      values - the values to be associated with the key
      Returns:
      a future whose value will be the collection of removed values, which may be empty

    • clear

      CompletableFuture<Void> clear()
      Removes all key-value pairs, after which it will be empty.
      Returns:
      a future whose value is irrelevant, simply used to determine if the call has completed

    • get

      CompletableFuture<Collection<V>> get(K key)
      Returns a collection of values associated with the specified key, if the key is not in the map it will return an empty collection.
      Parameters:
      key - the key whose associated values will be returned
      Returns:
      a future whose value will be the collection of the values associated with the specified key, the collection may be empty

    • keySet

      AsyncDistributedSet<K> keySet()
      Returns a set of the keys contained in this multimap with one or more associated values.
      Returns:
      a future whose value will be the collection of all keys with one or more associated values, this may be empty

    • keys

      AsyncDistributedMultiset<K> keys()
      Returns a multiset of the keys present in this multimap with one or more associated values each. Keys will appear once for each key-value pair in which they participate.
      Returns:
      a future whose value will be a multiset of the keys, this may be empty

    • values

      AsyncDistributedMultiset<V> values()
      Returns a collection of values in the set with duplicates permitted, the size of this collection will equal the size of the map at the time of creation.
      Returns:
      a future whose value will be a collection of values, this may be empty

    • entries

      AsyncDistributedCollection<Map.Entry<K,V>> entries()
      Returns a collection of each key-value pair in this map.
      Returns:
      a future whose value will be a collection of all entries in the map, this may be empty

    • asMap

      AsyncDistributedMap<K,Collection<V>> asMap()
      Returns the multimap as a distributed map.
      Returns:
      the multimap as a distributed map

    • listen

      default CompletableFuture<Cancellable> listen(MultimapEventListener<K,V> listener)
      Registers the specified listener to be notified whenever the map is updated.
      Parameters:
      listener - listener to notify about map events
      Returns:
      future that will be completed when the operation finishes

    • listen

      CompletableFuture<Cancellable> listen(MultimapEventListener<K,V> listener, Executor executor)
      Registers the specified listener to be notified whenever the map is updated.
      Parameters:
      listener - listener to notify about map events
      executor - executor to use for handling incoming map events
      Returns:
      future that will be completed when the operation finishes

    • removeListener

      CompletableFuture<Void> removeListener(MultimapEventListener<K,V> listener)
      Unregisters the specified listener such that it will no longer receive map change notifications.
      Parameters:
      listener - listener to unregister
      Returns:
      future that will be completed when the operation finishes

    • sync

      default DistributedMultimap<K,V> sync()
      Description copied from interface: AsyncPrimitive
      Returns a synchronous wrapper around the asynchronous primitive.
      Specified by:
      sync in interface AsyncPrimitive
      Returns:
      the synchronous primitive

    • sync

      DistributedMultimap<K,V> sync(Duration operationTimeout)
      Description copied from interface: AsyncPrimitive
      Returns a synchronous wrapper around the asynchronous primitive.
      Specified by:
      sync in interface AsyncPrimitive
      Parameters:
      operationTimeout - the synchronous operation timeout
      Returns:
      the synchronous primitive