java disruptor代码

以下是一个简单的 Java Disruptor 代码示例：

import com.lmax.disruptor.RingBuffer;
import com.lmax.disruptor.dsl.Disruptor;
import java.nio.ByteBuffer;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;

public class LongEvent {
    private long value;

    public void set(long value) {
        this.value = value;
    }
}

class LongEventFactory implements EventFactory<LongEvent> {
    public LongEvent newInstance() {
        return new LongEvent();
    }
}

class LongEventHandler implements EventHandler<LongEvent> {
    public void onEvent(LongEvent event, long sequence, boolean endOfBatch) {
        System.out.println("Event: " + event);
    }
}

public class DisruptorExample {
    public static void main(String[] args) {
        Executor executor = Executors.newCachedThreadPool();
        LongEventFactory factory = new LongEventFactory();
        int bufferSize = 1024;
        Disruptor<LongEvent> disruptor = new Disruptor<>(factory, bufferSize, executor);
        disruptor.handleEventsWith(new LongEventHandler());
        RingBuffer<LongEvent> ringBuffer = disruptor.start();
        ByteBuffer bb = ByteBuffer.allocate(8);
        for (long l = 0; true; l++) {
            bb.putLong(0, l);
            ringBuffer.publishEvent(new EventTranslatorOneArg<LongEvent, ByteBuffer>() {
                public void translateTo(LongEvent event, long sequence, ByteBuffer arg0) {
                    event.set(arg0.getLong(0));
                }
            }, bb);
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

该代码使用 LMAX Disruptor 实现了一个简单的事件处理程序。Disruptor 可以高效地处理并发事件处理任务，例如高性能日志记录、消息传递和网络通信。在这个例子中，我们定义了一个事件对象 LongEvent，包含一个 long 值。我们使用 LongEventFactory 为 Disruptor 创建新的事件对象，使用 LongEventHandler 处理事件。我们还定义了一个 ByteBuffer，用于在主线程中创建事件并将其发布到 Disruptor 中。在主线程中，我们每秒钟创建一个新事件并将其发布到 Disruptor 中。在事件处理程序中，我们简单地打印事件。