知识点总结(二)--Disruptor

1. Disruptor
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   6. volatile关键字的作用:保证可见性，禁止指令重排，不保证原子性

   7. 简单用法：

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   11. //消费者
       public class MsgConsumer implements EventHandler<MsgEvent>{
           private String name;
           public MsgConsumer(String name){
               this.name = name;
           }
           @Override
           public void onEvent(MsgEvent msgEvent, long l, boolean b) throws Exception {
               System.out.println(this.name+" -> 接收到信息： "+msgEvent.getValue());
           }
       }
       
       //生产者处理
       public class MsgProducer {
           private Disruptor disruptor;
           public MsgProducer(Disruptor disruptor){
               this.disruptor = disruptor;
           }
       
           public void send(String data){
               RingBuffer<MsgEvent> ringBuffer = this.disruptor.getRingBuffer();
               long next = ringBuffer.next();
               try{
                   MsgEvent event = ringBuffer.get(next);
                   event.setValue(data);
               }finally {
                   ringBuffer.publish(next);
               }
           }
       
           public void send(List<String> dataList){
               dataList.stream().forEach(data -> this.send(data));
           }
       }
       
       
       //触发测试
       public class DisruptorDemo {
           @Test
           public void test(){
               Disruptor<MsgEvent> disruptor = new Disruptor<>(MsgEvent::new, 1024, Executors.defaultThreadFactory());
       
               //定义消费者
               MsgConsumer msg1 = new MsgConsumer("1");
               MsgConsumer msg2 = new MsgConsumer("2");
               MsgConsumer msg3 = new MsgConsumer("3");
       
               //绑定配置关系
               disruptor.handleEventsWith(msg1, msg2, msg3);
               disruptor.start();
       
               // 定义要发送的数据
               MsgProducer msgProducer = new MsgProducer(disruptor);
               msgProducer.send(Arrays.asList("nihao","hah"));
           }
       }

2.  集合的遍历删除，不能使用增强for循环：

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