一个Java的Actor框架：kilim

除了Akka以外，另外一个将类似Erlang和Scala的Actor的并发模型引入Java的开源框架：kilim/kilim - GitHub，其使用了一种mailbox跨线程共享内存，没有锁或同步。

消息消费者代码如下，监听mailbox：

public class Calculator extends Task{
 
 private Mailbox<calculation> mailbox;
 
 public Calculator(Mailbox<calculation> mailbox) {
  super();
  this.mailbox = mailbox;
 }
 
 @[author]Override[/author]
 public void execute() throws Pausable, Exception {
  while (true) {   
   Calculation calc = mailbox.get(); // blocks
   if (calc.getAnswer() == null) {
    calc.setAnswer(calc.getDividend().divide(calc.getDivisor(), 8, 
      RoundingMode.HALF_UP));    
    System.out.println("Calculator determined answer");
    mailbox.putnb(calc);
   }
   Task.sleep(1000);
  }
 }
}
<p>