How to make a code thread safe in scala?

Question

I have a code in scala that, for various reasons, have few lines of code that cannot be accessed by more threads at the same time.

How to easily make it thread-safe?

Answer 1

If it is really very simple you can use synchronized: http://www.ibm.com/developerworks/java/library/j-scala02049/index.html

Or you could use some of the classes from the concurrent package in the jdk: http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/package-summary.html

If you want to use actors, you should use akka actors (they will replace scala actors in the future), see here: http://doc.akka.io/docs/akka/2.0.1/. They also support things like FSM (Finite State Machine) and STM (Software Transactional Memory).