Question

这对我来说是一个令人费解的问题。

此node.js服务器订阅并获取消息。

这是代码

1, count: 1, key: key1
2, count: 1, key: key1
3, count: 1, key: key1

expiring, count: 1

1, count: 2, key: key2
2, count: 2, key: key2
3, count: 2, key: key2

expiring, count: 2

我希望看到以下情况，事实上我大多数时间都会看到它们。

1, count: 1, key: key1
2, count: 1, key: key1

1, count: 2, key: key2
2, count: 2, key: key2


3, count: 2, key: key2
expiring, count: 2
expiring, count: 2  (notice count 2 is shared, I guess my-script is modified in memory and shared, and wonder how to prevent it)

我有时会看到以下序列，但我不明白它是如何发生的。

/ my-generator.js

define([
    'module',
    'text!my-script.js',
    'script-fn',
], function(module, myScript, scriptFn) {

    var MyGenerator = function* (count) {
        var scriptString = myScript; // + some other script

        var context = scriptFn.context;
        var fn = scriptFn.fn;
        fn(scriptString);

        var main = context.main;
        main.count = count;

        yield _.bind(main.wait, main);

        var result;             //something that I get by running fn

        return result;

    }
});

// script-fn.js
define([
    'vm'
], function(vm) {

    var sandbox = {};

    var context = vm.createContext(sandbox);
    var script = vm.createScript('(function(scriptString) { eval(scriptString) })');
    var fn = script.runInContext(context);

    return {
        context: context,
        fn: fn
    };
});


// my-script.js

main = {
    count: 0
};

var _ = requirejs('underscore');
var Backbone = requirejs('backbone');

main.messenger = new Backbone.Model();

_.extend(main, {

    wait: function (callback) {
        var timerId = _.delay(
            main.expire,
            3000
        );
        return main.messenger.once('done', callback);
    }

});

以下是其他难题......

<span[^>]*class=\"value\"[^>]*>([^<]*)<\/span>

node.js redis服务器，当订阅频道有多条消息时会发生什么？

0 个答案: