| | | Concurrent Maps | Contents |
A concurrent map can be accessed by several threads at once. In addition to the usual Map operations, it provides the following atomic operations:
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Operations in class ConcurrentMap | |
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What it is | What it does |
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m putIfAbsent(k, v) | Adds key/value binding k -> m unless k is already defined in m |
| m remove (k, v) | Removes entry for k if it is currently mapped to v. |
| m replace (k, old, new) | Replaces value associated with key k to new, if it was previously bound to old. |
| m replace (k, v) | Replaces value associated with key k to v, if it was previously bound to some value. |
ConcurrentMap is a trait in the Scala collections library. Currently, its only implementation is Java's java.util.concurrent.ConcurrentMap, which can be converted automatically into a Scala map using the standard Java/Scala collection conversions
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| | | Concurrent Maps | Contents |