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POHow to do sequential asynchronous ajax requests with given number of streams
 

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  1. POHow to do sequential asynchronous ajax requests with given number of streams
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    <p>I need to make sequential asynchronous ajax requests with limited streams. As of now I am allowed to occupy only one stream on web server so I can only do one ajax request at time.</p> <p>I have following function which helps me when I am allowed to use only one stream at a time.</p> <pre><code>function initiateChain() { var i = 0; var tasks = arguments; var callback = function () { i += 1; if (i != tasks.length) { tasks[i](callback); //block should call callback when done otherwise loop stops } } if (tasks.length != 0) { tasks[0](callback); //initiate first one } } </code></pre> <p>Say if I have three ajax helper functions</p> <pre><code> function getGadgets(callback) { //ajax call callback(); // I call this in complete callback of $.ajax } function getBooks(callback) { //ajax call callback(); // I call this in complete callback of $.ajax } function getDeals(callback) { //ajax call callback(); // I call this in complete callback of $.ajax } </code></pre> <p>following call ensures that no more than 1 ajax request is made from this client</p> <pre><code>initiateChain(getGadgets, getBooks, getDeals); </code></pre> <p>Now I need to enhance initiateChain to support arbitrary number of streams. Say I am allowed to use 2 or n number of streams I would like to know ideas to do so without changing ajax helper functions getGadgets, getDeals, getDeals.</p> <p>In short, I have a set of functions, N, in this case getGadgets, getDeals and getDeals(|N|=3) that each need a connection to the web server. Currently, I can only execute one request at a time, so initiateChain function calls the three methods in sequence. If I had access to M connections, I would like to execute |N| functions in parallel (up to a maximum of M).</p>
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    1. COWhat exactly is your question?
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      1. POHow to do sequential asynchronous ajax requests with given number of streams
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    2. COAs I mentioned I have a set of functions, N, in this case getGadgets, getDeals and getDeals(|N|=3) that each need a connection to the web server. Currently, I can only execute one request at a time, so initiateChain function calls the three methods in sequence. If I had access to M connections, I would like to execute |N| functions in parallel (up to a maximum of M).
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      1. POHow to do sequential asynchronous ajax requests with given number of streams
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