How to call apex class from process builder?

As we all know it is not possible to invoke apex class from work flow,for that purpose sfdc lunched new functionality called process builder.

Please go through this link. In my previous post i have explained about creation of process builder and updating a field through process builder.

http://salesforceworld4u.blogspot.in/2015/04/updating-records-thorough-lightening.html

Now this is post is all about calling an apex class from process builder.

public class DeleteBrassCaseUtil{

  @InvocableMethod(label='Get Brass Cases Names' description='Returns the list of Brass Cases corresponding to the specified Brass Cases IDs.')
  public static void deleteBrassCase(List<Id> BrassCaseIds)
    {
        List<BRASS_Case__c> brassCases =[SELECT Id,Is_Org_Case_Created__c FROM BRASS_Case__c WHERE Is_Org_Case_Created__c =true AND id IN :BrassCaseIds];
 
        delete brassCases;
    }
}

The annotation "@InvocableMethod" defines this method can be invoked from process builder. This class will delete some custom object records based on meeting criteria.

Below is the process builder.