pubsub javascript

First, using the array cache Subscriber subscription message, when the Subscriber subscribes to the message, push the subscription message to the queue of the specified message, and when the publisher publishes the message, we traverse the execution push to the specified message queue for the callback event.varPubsub= (function(){ vareventobj={}; return{subscribe:function(EVENT,FN) {eventobj[event]=fn}, publish:function(event) {if(Eventobj[event]) eventobj[event] (); }, off:function(EVENT,FN)

Wxpython learning] using the pubsub mechanism to update views Recently, I was busy working on a tool to generate xml packets for testing. In this tool, I have several panels that exist at the same time. One panel is used to manage data dictionaries. It can be edited. Other panels contain a display of these data dictionaries and cannot be edited. They reflect the same data source. At the same time, this tool can also import the transaction table accord

Pub/Sub publish and subscribe, pubsub publish and subscribeRelated commandsPSUBSCRIBEPUBLISHPUBSUBPUNSUBSCRIBESUBSCRIBEUNSUBSCRIBEPub/SubSUBSCRIBE, UNSUBSCRIBE and PUBLISH implement the Publish/Subscribe messaging paradigm where (citing Protocol) senders (publishers) are not programmed to send their messages to specific receivers (subscribers ). rather, published messages are characterized into channels, without knowledge of what (if any) subscribers

Redis source code analysis (30th) --- pubsub publish and subscribe Mode Today I learned the term "Publish and subscribe mode" in Redis, which was first introduced to JMS (Java Message Service) java Message Service. I subscribe to these types of messages. Only when these types of messages are broadcast and sent Will I filter other messages directly, this ensures an efficient transmission efficiency. Next, let's take a look at how Redis achieves this pu

In recent time, the development of message bus feature was postponed, and some time was spent to optimize and reconstruct the original pubsub mechanism. Here is a record of the optimization process and how it has changed compared to the original design.The role of pubsub within the message busPubSub is primarily used within the message bus for real-time control of all online clients. Each client in the use

NANOMSG Experiment--pubsubThe Publish subscription model is a common feature provided by many message middleware. The message mechanism enables the message publisher and the message to receive (consume) peopleTo decouple. PubSub mode is also one of the message models directly supported by NANOMSG, so through the PubSub model experiment,At the same time, we also have a general understanding of the basic usag

Today, I learned about the tall noun in Redis, "Publish subscription Mode", the word Publish subscription mode was heard in the JMS (Java message Service) Java Messaging Service when I first heard about it. This ranking in a popular point of saying, is that I subscribe to this type of message, when only this kind of message broadcast sent, I will, other messages directly filtered to ensure an efficient transmission efficiency. Let's cut to the chase and learn how Redis implements this publish su

a three-step plan: We need a method to bind the UI elements and attributes to each other.We need to monitor the changes in attributes and UI elements.We need to make all bound objects and elements aware of changes. There are still many ways to implement the above idea. A simple and effective method is to use the PubSub mode. This idea is simple: we use the data feature to bind HTML code. All JavaScript obj

takes 100ms and then setinterval and AJAX requests? This is easy if you understand the JavaScript event-driven mechanism. Leave a piece of code, let's try it for ourselves. Is that what everyone thinks? var obj = {"num": 1}, start = new Date;settimeout (function () {obj.num = 2}, 0); while (new Date-start Alert (json.stringify (obj)); Perhaps we can also think of some of the reasons behind the problems we usually encounter: Why is the setinterv

This article mainly introduces multiple implementation version instances of the observer mode of Javascript design mode. This article provides three implementation version codes and Jquery implementation versions. For more information, see Introduction The observer mode is also called the Publish/Subscribe mode. It defines a one-to-many relationship, allowing multiple observer objects to listen to a topic object at the same time, when the status of t

This article mainly introduces multiple implementation version instances of the observer mode of Javascript design mode. This article provides three implementation version codes and Jquery implementation versions. For more information, see Introduction The Observer Mode is also called the Publish/Subscribe mode. it defines a one-to-many relationship, allowing multiple observer objects to listen to a topic object at the same time, when the status of t

Multiple implementation version instances of the observer mode in the Javascript Design Mode This article mainly introduces multiple implementation version instances of the observer mode of Javascript design mode. This article provides three implementation version codes and Jquery implementation versions. For more information, see Introduction The observer mode is also called the Publish/Subscribe mode. I

JavaScript: Design Pattern-Observer PatternIntroduction The observer mode is also called the Publish/Subscribe mode. It defines a one-to-many relationship, allowing multiple observer objects to listen to a topic object at the same time, when the status of the topic object changes, all observer objects are notified so that they can automatically update themselves. Benefits of using the observer mode: Supports Simple broadcast communication to automat

Introduction The observer mode is also called the publish/subscribe mode. It defines a one-to-many relationship, allowing multiple observer objects to listen to a topic object at the same time, when the status of the topic object changes, all observer objects are notified so that they can automatically update themselves. Benefits of using the observer mode: Supports Simple broadcast communication to automatically notify all subscribed objects. After a page is loaded, the target obj

are many ways to do this, a simple and efficient approach is to implement it by publishing the subscriber pattern. The method is simple: we can use the custom data property as the attribute in the HTML code that needs to be bound. All of the JavaScript objects and DOM elements that are bound together will subscribe to this publication subscription object. Any time we detect changes in both JavaScript objec

The observer pattern, also called the Publish-subscribe pattern, defines a one-to-many relationship that allows multiple observer objects to listen to a Subject object at the same time, notifying all observers when the subject's state changes. It is composed of two types of objects, subject and observer, the topic is responsible for publishing events, while observers subscribe to these events to observe the subject, the Publisher and Subscribers are fully decoupled, do not know each other's exis

This article mainly introduces javascript asynchronous programming. You can learn javascript asynchronous programming from the ground up. If you are interested in javascript asynchronous programming, refer I. asynchronous mechanism The execution environment of JavaScript is single-threaded. The advantage of a single t

implementation methods, the simplest and most effective way is to use the publisher-subscriber mode. The idea is simple: you can use custom data attributes to specify bindings in HTML code. All bound JavaScript objects and DOM elements will "subscribe" to a publisher object. If a JavaScript object or an HTML input field is detected to be changed at any time, we send the proxy event to the publisher-subscri

Original Title: async javascript: build more responsive apps with less Code: (US) Bonham (Burnham, T .) translator: Xu qingsong series name: Turing Program Design Series Press: People's post and telecommunications Press ISBN: 9787115316578 Release Date: May 2013 published on: 32 Open page: 1 release: 1-1 category: more about computers, JavaScript asynchronous programming: designing fast-response network app

have changed, we will delegate the event to the Publisher-Subscriber pattern, which in turn broadcasts the change and propagates it to all bound objects and elements. Many people here naturally think of using jquery, using Dom's event actions to listen for UI changes, then modify the corresponding data fields, and then use the on change to listen for data fields from the definition event to broadcast the changes to all bound objects and elements. This article mainly discusses the use of