
Clojure Programming Cookbook
By :

In this recipe, we will learn Clojure's atoms, refs, and agents. Then we will have a look at Clojure's parallel features.
In this recipe, we will not use an external library. So, the only necessary thing is to start REPL to run code.
Clojure provides solutions for the concurrency problem. Clojure's vars defined in def
are ensured only in single thread and are not safe in concurrent environments. Clojure provides three types of resources for concurrent problem. Here, we will introduce you atoms, refs, and agents that work in concurrent environments.
Atoms provide a way to manage shared, synchronous, and independent states.
The atom
function sets the initial value to atom. The following code initializes the atom to 1
and sets the atom to the var x
:
(def x (atom 1)) ;;=? #'chapter06.concurrency/x
So, the value of x
binds to Atom
instance:
x ;;=> #<Atom@541e8f8d: 1>
To see the values...