scala.collection

# concurrent

#### package concurrent

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### Type Members

1. #### trait Map[A, B] extends mutable.Map[A, B]

   A template trait for mutable maps that allow concurrent access.

   A template trait for mutable maps that allow concurrent access.

   This is a base trait for all Scala concurrent map implementations. It provides all of the methods a `Map` does, with the difference that all the changes are atomic. It also describes methods specific to concurrent maps.

   Note: The concurrent maps do not accept `null` for keys or values.

   A

     the key type of the map

   B

     the value type of the map

   Since

     2.8

   See also

     "Scala's Collection Library overview" section on `Concurrent Maps` for more information.

2. #### final class TrieMap[K, V] extends Map[K, V] with mutable.MapLike[K, V, TrieMap[K, V]] with CustomParallelizable[(K, V), ParTrieMap[K, V]] with Serializable

   A concurrent hash-trie or TrieMap is a concurrent thread-safe lock-free implementation of a hash array mapped trie.

   A concurrent hash-trie or TrieMap is a concurrent thread-safe lock-free implementation of a hash array mapped trie. It is used to implement the concurrent map abstraction. It has particularly scalable concurrent insert and remove operations and is memory-efficient. It supports O(1), atomic, lock-free snapshots which are used to implement linearizable lock-free size, iterator and clear operations. The cost of evaluating the (lazy) snapshot is distributed across subsequent updates, thus making snapshot evaluation horizontally scalable.

   For details, see: http://lampwww.epfl.ch/~prokopec/ctries-snapshot.pdf

   Annotations
     @SerialVersionUID()
   Since

     2.10

### Value Members

1. #### object TrieMap extends MutableMapFactory[TrieMap] with Serializable

### Ungrouped