This method will return successfully after the * event has been posted to all subscribers, and regardless...of any exceptions thrown by * subscribers...(event); if (eventSubscribers.hasNext()) { dispatcher.dispatch(event, eventSubscribers); }...post(new DeadEvent(this, event)); } } 从上面代码可以看出,通过dispatcher.dispatch方法进行通知,这个方法的代码看下面代码: /** Global...(event, subscribers.next())); } EventWithSubscriber e; while ((e = queue.poll()) !
= method.getParameterTypes(); checkArgument(parameterTypes.length == 1, "Method %s has...@Subscribe annotation but has %s parameters...This method will return * successfully after the event has been posted to all subscribers, and...(event); if (eventSubscribers.hasNext()) { dispatcher.dispatch(event, eventSubscribers);...post(new DeadEvent(this, event)); } } 上面的解释比较清楚, 基本上核心的推送就是 dispatcher.dispatch(event, eventSubscribers
{ /** * 维护订阅者集合 */ private List subscribers; /** * 单例模式实例对象...*/ private static Dispatcher instance; private Dispatcher() { this.subscribers...注册订阅者 * @param subscriber */ public void register(Subscriber subscriber) { subscribers.add...取消订阅者 * @param subscriber */ public void unregister(Subscriber subscriber) { subscribers.remove...(); i++) { subscribers.get(i).onEvent(msg); } } } 5、客户端 public class Client {
private final SubscriberExceptionHandler exceptionHandler; private final SubscriberRegistry subscribers...= new SubscriberRegistry(this); private final Dispatcher dispatcher; // ......register(Object object) { subscribers.register(object); } public void unregister(Object...object) { subscribers.unregister(object); } // 利用 @Subscribe 注解可以实现 发送给匹配类型的观察者,而不是发送全部...(event instanceof DeadEvent)) { // the event had no subscribers and was not itself a DeadEvent
* * The ORSet has a version vector that is incremented when an element is added to * the set....yet seen that, or that B removed it and A has not yet seen that?...* * It has similar semantics as an [[ORSet]], but in case of concurrent updates * the values are...* * Subscribers will be notified periodically with the configured `notify-subscribers-interval...is also possible to send an explicit `FlushChanges` message to * the `Replicator` to notify the subscribers
executor; private final SubscriberExceptionHandler exceptionHandler; private final SubscriberRegistry subscribers...; private final Dispatcher dispatcher; public EventBus() { this("default"); } public EventBus...exceptionHandler) { this.subscribers = new SubscriberRegistry(this); this.identifier = (String...= (Dispatcher)Preconditions.checkNotNull(dispatcher); this.exceptionHandler = (SubscriberExceptionHandler...中获取消息信息进行特定的处理 其接口声明为 public interface SubscriberExceptionHandler { /** Handles exceptions thrown by subscribers
use: Basic Rate Interface (BRI) ISDN It uses two B (at 64 Kbps each) channels and one D (at 16 Kbps) channel...with a combined bandwidth of 144 Kbps and is generally used for home and small office subscribers....Primary Rate Interface (PRI) ISDN This implementation has up to 23 B channels and 1 D channel, at 64...Kbps per channel....B channel enable data to be transferred and one D channel provides for call setup, connection management
异步 异步推送处理Event和同步处理主要的区别点是使用的 Dispatcher不同, 同步是使用 PerThreadQueuedDispatcher , 异步是 LegacyAsyncDispatcher...(event, subscribers.next())); } EventWithSubscriber e; while ((e = queue.poll()) !...(new Event(event, subscribers)); if (!...= null) { while (nextEvent.subscribers.hasNext()) { nextEvent.subscribers.next().dispatchEvent...; private Event(Object event, Iterator subscribers) { this.event = event; this.subscribers
= new SubscriberRegistry(this); private final Dispatcher dispatcher; public EventBus() { this...identifier); this.executor = checkNotNull(executor); this.dispatcher = checkNotNull(dispatcher...post(new DeadEvent(this, event)); } } } identifier是时间总线的身份信息,subscribers是事件监听器容器,dispatcher...是事件派发器,我们看一下构造器和方法: 构造器: EventBus( String identifier, Executor executor, Dispatcher dispatcher,..., subscribers.next())); } EventWithSubscriber e; while ((e = queue.poll()) !
= new SubscriberRegistry(this); private final Dispatcher dispatcher; public EventBus() { this...identifier); this.executor = checkNotNull(executor); this.dispatcher = checkNotNull(dispatcher...(event instanceof DeadEvent)) { // the event had no subscribers and was not itself a DeadEvent...dispatcher是事件派发器,我们看一下构造器和方法: 构造器: EventBus( String identifier, Executor executor, Dispatcher dispatcher..., subscribers.next())); } EventWithSubscriber e; while ((e = queue.poll()) !
pollingDone: make(chan struct{}), rescanSRVInterval: 60 * time.Second, fsm: newFSM(), subscribers...= nil { return nil, nil, err } // If the provided client session has a pinned connection...} } 上面的逻辑大致就是,启动一个for死循环,进行如下逻辑: 获取topo的订阅对象,包含topo变更channel 从channel中获取一个可用的server节点 如果发生异常则退出循环 否则一致循环获取...Even if waitForNextCheck has already read from the done channel, we // can safely read from it...= nil { // Clear the pool once the description has been updated to Unknown.
rm sync.RWMutex } EventBus 有 subscribers,这是一个包含 DataChannelSlices 的 map。...当发布者向主题发布数据时,channel将接收数据。...[topic]; found { eb.subscribers[topic] = append(prev, ch) } else { eb.subscribers[topic...你可以看到事件总线通过 channel 分发事件。 基于简单 channel 的事件总线的源代码。...[topic]; found { eb.subscribers[topic] = append(prev, ch) } else { eb.subscribers[topic] = append
AsyncEventBus的构造方法如下List-2.1所示 List-2.1 public AsyncEventBus(Executor executor) { super("default", executor, Dispatcher.legacyAsync...bus.handleSubscriberException(e.getCause(), context(event)); } } }); } guava提供了三个Dispatcher...Queues.newConcurrentLinkedQueue(); @Override void dispatch(Object event, Iterator subscribers...) { checkNotNull(event); while (subscribers.hasNext()) { queue.add(new EventWithSubscriber(event..., subscribers.next())); } EventWithSubscriber e; while ((e = queue.poll()) !
ExecutionDispatcher dubbo-2.7.3/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/dispatcher.../execution/ExecutionDispatcher.java public class ExecutionDispatcher implements Dispatcher { public...URL url) { return new ExecutionChannelHandler(handler, url); } } ExecutionDispatcher实现了Dispatcher...SERVER_THREADPOOL_EXHAUSTED_ERROR cannot return properly, // therefore the consumer side has...=" + channelHandler, new ExchangeHandlerAdapter() { public String telnet(Channel channel,
ExecutionDispatcher dubbo-2.7.3/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/dispatcher.../execution/ExecutionDispatcher.java public class ExecutionDispatcher implements Dispatcher { public...URL url) { return new ExecutionChannelHandler(handler, url); } } ExecutionDispatcher实现了Dispatcher...SERVER_THREADPOOL_EXHAUSTED_ERROR cannot return properly, // therefore the consumer side has...=" + channelHandler, new ExchangeHandlerAdapter() { public String telnet(Channel channel,
>, CopyOnWriteArraySet> subscribers = Maps.newConcurrentMap(); 到这里,订阅者已经准备好了,准备接受事件了。...通过debug 看下subscribers中数据: ?...(event); if (eventSubscribers.hasNext()) { //转发事件 dispatcher.dispatch(event, eventSubscribers...我们使用的是AsyncEventBus,其中指定的事件转发器是:LegacyAsyncDispatcher,接着看看其中的dispatch()方法的实现: com.google.common.eventbus.Dispatcher.LegacyAsyncDispatcher...private static final class LegacyAsyncDispatcher extends Dispatcher { private final ConcurrentLinkedQueue
WrappedChannelHandler dubbo-2.7.3/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/dispatcher...void disconnected(Channel channel) throws RemotingException { handler.disconnected(channel);...ExecutionChannelHandler dubbo-2.7.3/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/dispatcher...SERVER_THREADPOOL_EXHAUSTED_ERROR cannot return properly, // therefore the consumer side has...ChannelEventRunnable dubbo-2.7.3/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/dispatcher
而发布订阅模式,一般由三类对象组成: 发布者 Publisher 事件发布者,将需要发布的事件传递给信道中介 信道中介 Event Channel 作为发布订阅的中介,需要缓存相应事件的订阅者列表,在发布者发布时遍历订阅者列表并通知它们...= this.subscriber[key] || []; this.subscriber[key] = subscribers.filter((_fn) => _fn !...= this.subscriber[key] || []; if (subscribers.length === 0) { console.log("has't subscriber..."); } subscribers.forEach((subscriber) => { subscriber.apply(this, args); }); }...publisher.article2); // fans2 receive article2 // 取消所有订阅 e.unsubscribeAll('event1'); e.publish('event1'); // has't
://www.youtube.com/channel/UC9OeZkIwhzfv-_Cb7fCikLQ 5、Data School (37K subscribers, 1.8M views) https.../channel/UC9pXDvrYYsHuDkauM2fLllQ 8、Allen Institute for Artificial Intelligence (AI2) (1.6K subscribers...(634 subscribers, 48K views) https://www.youtube.com/channel/UCXweTmAk9K-Uo9R6SmfGtjg 10、Understanding...Machine Learning — Shai Ben-David (973 subscribers, 43K views) https://www.youtube.com/channel/UCR4_...akQ1HYMUcDszPQ6jh8Q 11、Machine Learning TV (455 subscribers, 11K views) https://www.youtube.com/channel
领取专属 10元无门槛券
手把手带您无忧上云