rspec/rules/S3067/java/rule.adoc

``++getClass++`` should not be used for synchronization in non-``++final++`` classes because child classes will synchronize on a different object than the parent or each other, allowing multiple threads into the code block at once, despite the ``++synchronized++`` keyword.


Instead, hard code the name of the class on which to synchronize or make the class ``++final++``.


== Noncompliant Code Example

[source,java]
----
public class MyClass {
  public void doSomethingSynchronized(){
    synchronized (this.getClass()) {  // Noncompliant
      // ...
    }
  }
----


== Compliant Solution

[source,java]
----
public class MyClass {
  public void doSomethingSynchronized(){
    synchronized (MyClass.class) {
      // ...
    }
  }
----


== See

* https://wiki.sei.cmu.edu/confluence/x/qTdGBQ[CERT, LCK02-J.] - Do not synchronize on the class object returned by getClass()


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