MVCC Demo

This is a small demo that shows MVCC/STM in Clojure at work.

Essentiall, a counter is incremented and decremented (or the other way round).

Here is a possible output:

--> increment has been invoked
--> increment reads the current value
--> decrement has been invoked
--> decrement reads the current value
--> decrementing now
--> decrementing done
--> incrementing now
--> increment reads the current value
--> incrementing now
--> incrementing done
final counter: 0
last operation: incremented

Note that

--> increment reads the current value
--> incrementing now

appears twice, this due to the transaction.

Build the Demo

Get leiningen and invoke lein uberjar.

Run the Demo

java -jar mvcc-1.0.0-SNAPSHOT-standalone.jar