question

Hello,

I'm using Shared Group Data to store int arrays that change frequently. (I'm aware that SGD should be restricted to small groups of players, but as a temporary solution we use it for all our players, and we intend to find a better solution if/when our title scales up.)

Whenever a player completes an activity and gets a score in our game, it gets added to a list in SGD via a CloudScript function, reproduced here:

var MAX_SCORES = 200;


handlers.submitScore = function(args)
// Adds a new score to the specified activity
{
    var environment = args.environment; // string
    var activityId = args.activityId; // string
    var score = args.score; // int: the new score
    
    var sharedGroupId = "Scores_" + environment;
    var result = null;
    var scores = null;


    try
    {
        result = server.GetSharedGroupData({ SharedGroupId: sharedGroupId, Keys: [ activityId ] });
    }
    catch (e)
    {
        log.error("GetSharedGroupData: Error: " + e.message);
        return;
    }


    if (result == null)
    {
        log.info("GetSharedGroupData: No result");
        scores = [score];
    }
    else if (!result.Data.hasOwnProperty(activityId))
    {
        log.info("GetSharedGroupData: Activity '" + activityId + "' not found");
        scores = [score];
    }
    else
    {
        var scoresAsJson = result.Data[activityId].Value;
        scores = JSON.parse(scoresAsJson);

        scores.push(score);
        scores = scores.slice(-MAX_SCORES); // only keep the last MAX_SCORES values
    }
    
    var scoresAsJson = JSON.stringify(scores);
    log.info("scores: " + scoresAsJson + " (" + scores.length + " elements)");
    
    var data = {};
    data[activityId] = scoresAsJson;
    server.UpdateSharedGroupData({ SharedGroupId: sharedGroupId, Data: data });
}

There seems to be a recurring problem where sometimes a comma is missing between two values in these lists, eg it contains '[40,46,17,4533,99]' instead of '[40,46,17,45,33,99]' (notice the comma between 45 and 33). I suspect the problem is with JSON.parse()/JSON/stringify(), perhaps because the function is called too frequently, but I haven't been able to confirm.

Has anyone else encountered this problem? Thank you.