pubsub

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

=eventquence.length; if(len>0) {Eventquence.foreach (Item,index)={item ()})} }, off:function(EVENT,FN) {varEventquence =Quence[event]; if(eventquence) {quence[event]= Eventquence.filter (function(item) {returnItem!==fn; }); } } }})()functionFirst () {Console.log ("Emit first")}functionsecond () {Console.log ("Emit second")}pubsub1.subscribe (A, first) Pubsub1.subscribe (A, second) Pubsub1.off (' A ', first)//unsubscribe from a first eventPubsub1.publish ("a");JavaScript Publ

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

Publish/subscribePublish/SubscribeRedis-py includes a PubSub object, subscribes to channels, and listens for new messages. Creating a PubSub object is easy./redis-py with PUBSUB goals that can subscribe to channels and listen to new information. Here's how to create a pubsub:>>> r = Redis. Strictredis (...)>>> p = r.pu

these frameworks is the only choice. The following idea is actually very basic and can be considered as 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

expanded and reused separately. Body (version 1) In JS, the implementation of the observer mode is implemented through callback. We first define a pubsub object, which contains three methods: subscription, unsubscription, and release. The Code is as follows: Var pubsub = {}; (Function (q ){ Var topics ={}, // array stored by the callback function SubUid =-1; // Release Method Q. publish = function (topic,

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 automatically notify all subscribed objects. After

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

-start Alert (json.stringify (obj)); Perhaps we can also think of some of the reasons behind the problems we usually encounter: Why is the setinterval execution interval less than settimeout in most cases?Why is there a minimum interval for settimeout? The HTML5 specification of WHATWG and the Consortium stipulates that 4msWhy is it recommended that time-consuming functions be executed multiple times? For example, Process.nexttick. There are now 3 main programs for asynchronous programming:

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 objects and DOM elements bound together will subscribe to a PubSub object. When a JavaScript object or an HTML input element m

. There are still many ways to achieve the above ideas, there is a simple and effective way is to use the PubSub mode. The idea is simple: we use data attributes to bind HTML code, and all the JavaScript objects and DOM elements that are bound together subscribe to a PubSub object. Whenever a JavaScript object or an HTML INPUT element is monitoring the changes in the data, the events bound to the

apps from the queue to the last level of exchange is the ability to see the ownership of a queue at a glance on the console and to control all the queue under an app. In fact, to do this, just need to maintain a good app and queue logical relationship (through the control console interface to manipulate the database), there is no need to maintain the app becomes real exchange also makes the whole route more layer, but affect performance. So decided to remove the app Exchange layer.Tradeoffs of

pattern ).Function PubSub (){Var pubSub = {Callbacks :{},On: function (msg, callback ){This. callbacks [msg] = this. callbacks [msg] | [];This. callbacks [msg]. push (callback );},Publish: function (msg ){This. callbacks [msg] = this. callbacks [msg] | [];For (var I = 0, len = this. callbacks [msg]. length; I This. callbacks [msg] [I]. apply (this, arguments );}; } }Return

implemented through callback. We first define a pubsub object, which contains three methods: subscription, unsubscription, and release. The Code is as follows: Var pubsub = {};(Function (q ){ Var topics ={}, // array stored by the callback functionSubUid =-1;// Release MethodQ. publish = function (topic, args ){ If (! Topics [topic]) {Return false;} SetTimeout (function (){Var subscribers = topics [topic]

implemented through callback. We first define a pubsub object, which contains three methods: subscription, unsubscription, and release. The code is as follows: Var pubsub = {};(Function (q ){ Var topics ={}, // array stored by the callback functionSubUid =-1;// Release methodQ. publish = function (topic, args ){ If (! Topics [topic]) {Return false;} SetTimeout (function (){Var subscribers = topics [topic]

is triggered, the main program is "under download... ", after the download is complete, the thread notifies the window program to update the state to" download completed... ", such interactions are at least friendly. How to Use wxpython multithreading: wxpython developers suggest using wx. CallAfter + PubSub. The CallAfter owner pushes the time to the main program. PubSub enables the wxPython application t