Scala synchronized
Examples
synchronize on an object
synchronized is a low-level concurrency construct that can help preventing multiple threads access the same resources. Introduction for the JVM using the Java language.
anInstance.synchronized {
// code to run when the intristic lock on `anInstance` is acquired
// other thread cannot enter concurrently unless `wait` is called on `anInstance` to suspend
// other threads can continue of the execution of this thread if they `notify` or
`notifyAll` `anInstance`'s lock
}In case of objects it might synchronize on the class of the object, not on the singleton instance.
synchronize implicitly on this
/* within a class, def, trait or object, but not a constructor */
synchronized {
/* code to run when an intrisctic lock on `this` is acquired */
/* no other thread can get the this lock unless execution is suspended with
* `wait` on `this`
*/
}