Title

var pubsub = {};

(function(myObject) {

// Storage for topics that can be broadcast 可以廣播的主題的存儲(chǔ)

// or listened to 或者聽(tīng)

var topics = {};

// A topic identifier 主題標(biāo)識(shí)符

var subUid = -1;

// Publish or broadcast events of interest 發(fā)布或廣播感興趣的事件

// with a specific topic name and arguments 具有特定的主題名稱和參數(shù)

// such as the data to pass along 如數(shù)據(jù)傳遞

myObject.publish = function( topic, args ) {

if ( !topics[topic] ) {

return false;

}

var subscribers = topics[topic],

len = subscribers ? subscribers.length : 0;

while (len--) {

subscribers[len].func( topic, args );

}

return this;

};

// Subscribe to events of interest 訂閱感興趣的事件

// with a specific topic name and a 具有特定的主題名稱和

// callback function, to be executed 回調(diào)函數(shù)，將被執(zhí)行

// when the topic/event is observed 當(dāng)觀察到主題/事件時(shí)

myObject.subscribe = function( topic, func ) {

if (!topics[topic]) {

topics[topic] = [];

}

var token = ( ++subUid ).toString();

topics[topic].push({

token: token,

func: func

});

return token;

};

// Unsubscribe from a specific 取消訂閱

// topic, based on a tokenized reference 主題，基于標(biāo)記化參考

// to the subscription 訂閱

myObject.unsubscribe = function( token ) {

for ( var m in topics ) {

if ( topics[m] ) {

for ( var i = 0, j = topics[m].length; i < j; i++ ) {

if ( topics[m][i].token === token ) {

topics[m].splice( i, 1 );

return token;

}

}

}

}

return this;

};

}( pubsub ));

// A simple message logger that logs any topics and data received through our 一個(gè)簡(jiǎn)單的消息記錄器，記錄通過(guò)我們接收的任何主題和數(shù)據(jù)。

// subscriber 用戶

var messageLogger = function ( topics, data ) {

console.log( "Logging: " + topics + ": " + data );

};

// Subscribers listen for topics they have subscribed to and 訂閱者監(jiān)聽(tīng)他們訂閱的主題和

// invoke a callback function (e.g messageLogger) once a new 調(diào)用一個(gè)新的回調(diào)函數(shù)(例如MasigelgGER)

// notification is broadcast on that topic 這個(gè)主題廣播通知

var subscription = pubsub.subscribe( "inbox/newMessage", messageLogger );

// Publishers are in charge of publishing topics or notifications of 出版商負(fù)責(zé)出版主題或通知。

// interest to the application. e.g: 對(duì)應(yīng)用程序有興趣。例如：

pubsub.publish( "inbox/newMessage", "hello world!" );

// or

pubsub.publish( "inbox/newMessage", ["test", "a", "b", "c"] );

// or

pubsub.publish( "inbox/newMessage", {

sender: "hello@google.com",

body: "Hey again!"

});

// We can also unsubscribe if we no longer wish for our subscribers 如果我們不再希望我們的訂戶，我們也可以退訂。

// to be notified 被通知

pubsub.unsubscribe( subscription );

// Once unsubscribed, this for example won't result in our 一旦退訂，這將不會(huì)導(dǎo)致我們的

// messageLogger being executed as the subscriber is MasaGelgGER作為訂閱服務(wù)器執(zhí)行

// no longer listening 不再聽(tīng)

pubsub.publish( "inbox/newMessage", "Hello! are you still there?" );

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