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  1. #1

    Subscription Challenges

    Hi trying to use LS with IG api and having trouble getting a subscription set up.

    Keep getting following error:

    Error encountered !
    Status code: unknown
    Error code: ReferenceError: subscription is not defined


    Can get data from API call no problem.
    Can connect to LS no problem.
    But setting up the subscription is proving very problematic.
    I've added the function code below if anyone can help much appreciated:
    // Now subscribe to the BID and OFFER prices
    var fieldList = ["bid","offer","updateTime","delayTime","marketStat us"];
    require(["Subscription"], function (Subscription) {
    // Set up Lightstreamer FIDs
    var subscription = new Subscription("MERGE","L1:IX.D.DAX.IFD.IP",fieldLis t)
    });

    // Set up Lightstreamer event listener
    subscription.addListener({
    onSubscription: function () {
    console.log('subscribed');
    },
    onSubscriptionError: function (code, message) {
    console.log('subscription failure: ' + code + " message: " + message);
    },
    onItemUpdate: function (updateInfo) {

    // Lightstreamer published some data
    // Add a new row to data table
    var marketStatus=getValue(marketStatus);
    var bidprc=getValue(bid);
    var offprc=getValue(offer);
    var delayTm=getValue(delayTime);
    var updTm=getValue(updateTime);
    var chg = "";

    $('#search_results_list').find('tbody:last').appen d(''+marketStatus+''+updTm+''+delayTm+''+bidprc+'' +offprc+''+chg+'');
    }

    });
    // Subscribe to Lightstreamer
    lsClient.subscribe(subscription);

  2. #2
    Administrator
    Join Date
    Feb 2012
    Location
    Milano
    Posts
    543
    Hi kmm2908,

    It should be a problem about the scope of subscription variable; in your code it is visible only within the require block. Please try something like this:

 

 

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