What is the Scala Collection equivalent to Concurrenthashmap?

Question

Hello, how can I implement a Concurrenthashmap in Scala?

Answer 1

In addition to the already constant in java, in the package java.util.concurrent, in scala we have a extension for this API, also to work with collections that are thread safe, the package scala.collection.concurrent. It has fewer classes/interfaces than java, until you can use the API classes in java.

Specifically in relation to ConcurrentHashMap java, which uses hash tables, there we have nothing equal, ie also implement map exclusively with hash tables.

What we have there is the TrieMap implementing Map, it combines in the implementation hash tables and associative vector of prefix trees.

If it’s not what you want to wear, you can wear something like this:

import scala.collection._
import scala.collection.convert.decorateAsScala._
import java.util.concurrent.ConcurrentHashMap

val cMap: concurrent.Map[String, String] = new ConcurrentHashMap().asScala

This way, use ConcurrentHashMap of java in scala like =)

P.S.: see also the commenting of @Anthonyaccioly, quite interesting the benchmark article.