[z]https://www.jb51.net/article/135475.htm
disruptor不过多介绍了,描述下当前的业务场景,两个应用A,B,应用 A 向应用 B 传递数据 . 数据传送比较快,如果用http直接push数据然后入库,效率不高.有可能导致A应用比较大的压力. 使用mq 太重量级,所以选择了disruptor. 也可以使用Reactor
BaseQueueHelper.java
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/** * lmax.disruptor 高效队列处理模板. 支持初始队列，即在init()前进行发布。 * * 调用init()时才真正启动线程开始处理 系统退出自动清理资源. * * @author xielongwang * @create 2018-01-18 下午3:49 * @email xielong.wang@nvr-china.com * @description */public abstract class BaseQueueHelper<D, E extends ValueWrapper<D>, H extends WorkHandler<E>> { /** * 记录所有的队列，系统退出时统一清理资源 */ private static List<BaseQueueHelper> queueHelperList = new ArrayList<BaseQueueHelper>(); /** * Disruptor 对象 */ private Disruptor<E> disruptor; /** * RingBuffer */ private RingBuffer<E> ringBuffer; /** * initQueue */ private List<D> initQueue = new ArrayList<D>(); /** * 队列大小 * * @return 队列长度，必须是2的幂 */ protected abstract int getQueueSize(); /** * 事件工厂 * * @return EventFactory */ protected abstract EventFactory<E> eventFactory(); /** * 事件消费者 * * @return WorkHandler[] */ protected abstract WorkHandler[] getHandler(); /** * 初始化 */ public void init() { ThreadFactory namedThreadFactory = new ThreadFactoryBuilder().setNameFormat("DisruptorThreadPool").build(); disruptor = new Disruptor<E>(eventFactory(), getQueueSize(), namedThreadFactory, ProducerType.SINGLE, getStrategy()); disruptor.setDefaultExceptionHandler(new MyHandlerException()); disruptor.handleEventsWithWorkerPool(getHandler()); ringBuffer = disruptor.start(); //初始化数据发布 for (D data : initQueue) { ringBuffer.publishEvent(new EventTranslatorOneArg<E, D>() { @Override public void translateTo(E event, long sequence, D data) { event.setValue(data); } }, data); } //加入资源清理钩子 synchronized (queueHelperList) { if (queueHelperList.isEmpty()) { Runtime.getRuntime().addShutdownHook(new Thread() { @Override public void run() { for (BaseQueueHelper baseQueueHelper : queueHelperList) { baseQueueHelper.shutdown(); } } }); } queueHelperList.add(this); } } /** * 如果要改变线程执行优先级，override此策略. YieldingWaitStrategy会提高响应并在闲时占用70%以上CPU， * 慎用SleepingWaitStrategy会降低响应更减少CPU占用，用于日志等场景. * * @return WaitStrategy */ protected abstract WaitStrategy getStrategy(); /** * 插入队列消息，支持在对象init前插入队列，则在队列建立时立即发布到队列处理. */ public synchronized void publishEvent(D data) { if (ringBuffer == null) { initQueue.add(data); return; } ringBuffer.publishEvent(new EventTranslatorOneArg<E, D>() { @Override public void translateTo(E event, long sequence, D data) { event.setValue(data); } }, data); } /** * 关闭队列 */ public void shutdown() { disruptor.shutdown(); }} |
EventFactory.java
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/** * @author xielongwang * @create 2018-01-18 下午6:24 * @email xielong.wang@nvr-china.com * @description */public class EventFactory implements com.lmax.disruptor.EventFactory<SeriesDataEvent> { @Override public SeriesDataEvent newInstance() { return new SeriesDataEvent(); }} |
MyHandlerException.java
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public class MyHandlerException implements ExceptionHandler { private Logger logger = LoggerFactory.getLogger(MyHandlerException.class); /* * (non-Javadoc) 运行过程中发生时的异常 * * @see * com.lmax.disruptor.ExceptionHandler#handleEventException(java.lang.Throwable * , long, java.lang.Object) */ @Override public void handleEventException(Throwable ex, long sequence, Object event) { ex.printStackTrace(); logger.error("process data error sequence ==[{}] event==[{}] ,ex ==[{}]", sequence, event.toString(), ex.getMessage()); } /* * (non-Javadoc) 启动时的异常 * * @see * com.lmax.disruptor.ExceptionHandler#handleOnStartException(java.lang. * Throwable) */ @Override public void handleOnStartException(Throwable ex) { logger.error("start disruptor error ==[{}]!", ex.getMessage()); } /* * (non-Javadoc) 关闭时的异常 * * @see * com.lmax.disruptor.ExceptionHandler#handleOnShutdownException(java.lang * .Throwable) */ @Override public void handleOnShutdownException(Throwable ex) { logger.error("shutdown disruptor error ==[{}]!", ex.getMessage()); }} |
SeriesData.java (代表应用A发送给应用B的消息)
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public class SeriesData { private String deviceInfoStr; public SeriesData() { } public SeriesData(String deviceInfoStr) { this.deviceInfoStr = deviceInfoStr; } public String getDeviceInfoStr() { return deviceInfoStr; } public void setDeviceInfoStr(String deviceInfoStr) { this.deviceInfoStr = deviceInfoStr; } @Override public String toString() { return "SeriesData{" + "deviceInfoStr='" + deviceInfoStr + '\'' + '}'; }} |
SeriesDataEvent.java
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public class SeriesDataEvent extends ValueWrapper<SeriesData> {} |
SeriesDataEventHandler.java
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public class SeriesDataEventHandler implements WorkHandler<SeriesDataEvent> { private Logger logger = LoggerFactory.getLogger(SeriesDataEventHandler.class); @Autowired private DeviceInfoService deviceInfoService; @Override public void onEvent(SeriesDataEvent event) { if (event.getValue() == null || StringUtils.isEmpty(event.getValue().getDeviceInfoStr())) { logger.warn("receiver series data is empty!"); } //业务处理 deviceInfoService.processData(event.getValue().getDeviceInfoStr()); }} |
SeriesDataEventQueueHelper.java
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@Componentpublic class SeriesDataEventQueueHelper extends BaseQueueHelper<SeriesData, SeriesDataEvent, SeriesDataEventHandler> implements InitializingBean { private static final int QUEUE_SIZE = 1024; @Autowired private List<SeriesDataEventHandler> seriesDataEventHandler; @Override protected int getQueueSize() { return QUEUE_SIZE; } @Override protected com.lmax.disruptor.EventFactory eventFactory() { return new EventFactory(); } @Override protected WorkHandler[] getHandler() { int size = seriesDataEventHandler.size(); SeriesDataEventHandler[] paramEventHandlers = (SeriesDataEventHandler[]) seriesDataEventHandler.toArray(new SeriesDataEventHandler[size]); return paramEventHandlers; } @Override protected WaitStrategy getStrategy() { return new BlockingWaitStrategy(); //return new YieldingWaitStrategy(); } @Override public void afterPropertiesSet() throws Exception { this.init(); }} |
ValueWrapper.java
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public abstract class ValueWrapper<T> { private T value; public ValueWrapper() {} public ValueWrapper(T value) { this.value = value; } public T getValue() { return value; } public void setValue(T value) { this.value = value; }} |
DisruptorConfig.java
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@Configuration@ComponentScan(value = {"com.portal.disruptor"})//多实例几个消费者public class DisruptorConfig { /** * smsParamEventHandler1 * * @return SeriesDataEventHandler */ @Bean public SeriesDataEventHandler smsParamEventHandler1() { return new SeriesDataEventHandler(); } /** * smsParamEventHandler2 * * @return SeriesDataEventHandler */ @Bean public SeriesDataEventHandler smsParamEventHandler2() { return new SeriesDataEventHandler(); } /** * smsParamEventHandler3 * * @return SeriesDataEventHandler */ @Bean public SeriesDataEventHandler smsParamEventHandler3() { return new SeriesDataEventHandler(); } /** * smsParamEventHandler4 * * @return SeriesDataEventHandler */ @Bean public SeriesDataEventHandler smsParamEventHandler4() { return new SeriesDataEventHandler(); } /** * smsParamEventHandler5 * * @return SeriesDataEventHandler */ @Bean public SeriesDataEventHandler smsParamEventHandler5() { return new SeriesDataEventHandler(); }} |
测试
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//注入SeriesDataEventQueueHelper消息生产者@Autowiredprivate SeriesDataEventQueueHelper seriesDataEventQueueHelper;@RequestMapping(value = "/data", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)public DataResponseVo<String> receiverDeviceData(@RequestBody String deviceData) { long startTime1 = System.currentTimeMillis(); if (StringUtils.isEmpty(deviceData)) { logger.info("receiver data is empty !"); return new DataResponseVo<String>(400, "failed"); } seriesDataEventQueueHelper.publishEvent(new SeriesData(deviceData)); long startTime2 = System.currentTimeMillis(); logger.info("receiver data ==[{}] millisecond ==[{}]", deviceData, startTime2 - startTime1); return new DataResponseVo<String>(200, "success");} |
应用A通过/data 接口把数据发送到应用B ,然后通过seriesDataEventQueueHelper 把消息发给disruptor队列,消费者去消费,整个过程对不会堵塞应用A. 可接受消息丢失, 可以通过扩展SeriesDataEventQueueHelper来达到对disruptor队列的监控
