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  1. Replies
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    Hi Dejan, The snapshot to be sent to the...

    Hi Dejan,

    The snapshot to be sent to the client is actually managed by the Lightstreamer Server. It is the responsibility of the Server to maintain the snapshot for a given Item and to send it to...
  2. Hi, I'm not sure I've correctly understood...

    Hi,

    I'm not sure I've correctly understood your scenario. basically what I've understood is that you have a data adapter which connects to web servers and app servers to check connectivity and...
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    2,076

    Hi Dejan, In RAW mode and in DISTINCT mode...

    Hi Dejan,

    In RAW mode and in DISTINCT mode with unfiltered dispatching the bufferSize is unlimited, thus all itemEvents supplied by the Data Adapter are kept in the itemEventBuffer, allowing event...
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    5,887

    A simple object will do the job var...

    A simple object will do the job



    var subscriptions = {};

    // add a subscription
    subscriptions[itemName] = true;

    // test if an item name is already subscribed
  5. Replies
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    5,887

    Hi Gino, Keeping track of the subscribed item...

    Hi Gino,

    Keeping track of the subscribed item on the adapter and sending to the Lightstreamer Server just the itemEvents for Items actually subscribed, is a best practice compared to sending all...
  6. Hi, You may enable the forwarding of the...

    Hi,

    You may enable the forwarding of the cookies to the Metadata Adapter, setting to 'Y' the <forward_cookies> configuration element in the SECURITY CONFIGURATION section of the...
  7. Hi, In the "two-level push", the Data Adapter...

    Hi,

    In the "two-level push", the Data Adapter of the second level is actually independent from the Data Adapter of the first level.
    The second level adapter is in fact a Data Adapter on its own,...
  8. ... continue The second technique uses a...

    ... continue



    The second technique uses a predetermined 'response' item, where all the responses will be published.
    The client subscribes to the 'response' item and it keeps the subscription...
  9. Hi If I've well understood, what you are...

    Hi

    If I've well understood, what you are asking is how to implement the request reply paradigm with Lightstreamer, stated Lightstreamer is specialized for Publish/Subscribe, rather than...
  10. Hi Shabbir, You can find the description of...

    Hi Shabbir,

    You can find the description of connection and session in Lightstreamer General Concepts in chapter 2, Lightstreamer Glossary.
    Basically a connection represent the actual tcp...
  11. Yes, you are correct: it's up to the Data...

    Yes, you are correct:
    it's up to the Data Adapter to manually track subscriptions with subscribe/unsubscribe and manually check them before each call of listener.update()

    cheers
    Marco
  12. Hi Tony, Actually, when the are no more active...

    Hi Tony,

    Actually, when the are no more active subscription, the Lightstreamer Server notifies the Data Adapter on the unsubscribe method.
    The Data Adapter is supposed to stop sending updates for...
  13. Thanks for reporting this issue. We actually...

    Thanks for reporting this issue.
    We actually found a bug in lightstreamer_node.js which prevents to load correctly the required modules.
    We will release a new version as soon as possible, but for...
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    Hi, Lightstreamer Server contains an internal...

    Hi,

    Lightstreamer Server contains an internal web server that is able to serve static web resources. But actually it is only for demo purpose and to get started with Lightstreamer development....
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    Hi metero, I presume you are using the DEMO...

    Hi metero,

    I presume you are using the DEMO License, and the DEMO License is limited to a maximum of 20 concurrent users.
    This means actually that you may have at most 20 concurrent sessions....
  16. Hi kjohann You can try the Vivace Edition with...

    Hi kjohann

    You can try the Vivace Edition with a DEMO License for free, but just not in production.
    The Moderato Edition and the Allegro/Presto/Vivace Edition are actually two differente...
  17. Hi kjohann, Are you using the Moderato...

    Hi kjohann,

    Are you using the Moderato Edition?
    The Moderato Edition is limited up to 1 update per second for each Item. This means that only one update per second per item is allowed, but there...
  18. Replies
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    4,683

    First of all, you can check if the Lightstreamer...

    First of all, you can check if the Lightstreamer server is correctly installed by pointing your browser to "http://localhost:8080"
    You should see a welcome page containing the links to some...
  19. Hi, Actually, as already pointed out in a...

    Hi,

    Actually, as already pointed out in a previous post, since older versions are not maintained any more, you should upgrade to the latest version (5.x).
    You can download the latest...
  20. Replies
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    3,812

    Hi Edward, As I said, it's just a workaround,...

    Hi Edward,

    As I said, it's just a workaround, so, yes, in order to override the filed values of an item state in the snapshot, the Data Adapter may send an ItemEvent with empty strings for the...
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    Hi Edward, Currently there is not such a...

    Hi Edward,

    Currently there is not such a function like a snapshot expiration, but it will be introduced in the next upcoming Lightstreamer release, expected for the first months of next year.
    For...
  22. Hi Edward, I presume you have more than one...

    Hi Edward,

    I presume you have more than one adapter, and my suspect is that not all the adapters are actually correctly initialized.
    Could be that not for all the adapters the log message "<...
  23. Hi Edward, When you experience the lack of the...

    Hi Edward,

    When you experience the lack of the log messages, is the server actually running correctly? I mean: the only problem is you don't see the log messages, or the server or one of the...
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    Hi shifter1 Are you interacting to a...

    Hi shifter1


    Are you interacting to a lightstreamer server by hand? I mean: It's actually you, not a program, which is sending the requests to the server?
    I'm asking this because the server has...
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    Hi milad.j no, unfortunately, from the...

    Hi milad.j


    no, unfortunately, from the JavaScript Client API, there isn't a way to send custom headers for the request.


    Marco
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