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Should choose which database to store data with nodeJS

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  • oplik0O

    Is using two instances with shared database but different theme/plugins possible?

    General Discussion
    1 Votes
    1 Posts
    154 Views
    oplik0O

    I'll soon be creating a custom theme and some plugins for a forum that is already in use and I'm thinking about running second instance on beta.forum.url with the new theme and plugins enabled when it's close to being ready (but in need of testing), that I'd like to work with the same database as the main forum - so that users can just use beta if they want to preview new features while still using the same forum as others.

    Now, I know that the list of themes/plugins enabled is stored in database, so I'd probably need to do something about that, but is there anything else that would stop me from running two instances with a bit different configs off one database? Some sync issue with posts/topics or something like that?

    EDIT: actually, since I might as well help others, would it be a good idea to add an option to add some instance identifier to db plugin entries to core? Perhaps in config.json? So that if it's set NodeBB would look for plugins:<instance>:active for example.

  • V

    I have some trouble with how to write native abstraction for nodejs

    Unsolved General Discussion
    0 Votes
    1 Posts
    477 Views
    V

    Hi,guys, I'm new to node.js and I have met some difficult problems. Now, I 'm writing a native abstraction for node.js to combine with my cpp code, which are some re-encapsulated function about OpenCV's camera calibration algorithm. The thing is I don't know how to convert opecv datatype to v8 datatype, such as std::vector<cv::Mat>,
    std::vector<std::vector<cv::Point2f>.
    I do know how to convert single cv::Mat datatype and a vector<Point2f> datatype to v8 Object, I`ll attach those code in the end, please give me some suggestion about how to convert vector<Mat> and vector<vector<Point2f>> to v8 object.
    if(info.Length()!=1) return;
    char buffer = node::Buffer::Data(info[0]->ToObject());
    size_t size = node::Buffer::Length(info[0]->ToObject());
    std::vector<char> src(buffer, buffer + size);
    std::vector<uchar> dst = new std::vector<uchar>();
    //do some thing with it
    //return
    info.GetReturnValue().Set(
    Nan::NewBuffer((char)dst->data(), dst->size(), png_delete_callback, dst).ToLocalChecked()
    );
    //**This is how to convert a cv::Mat to v8 buffer*/

    v8::Localv8::Object obj = Nan::Newv8::Object();
    Nan::Set(obj, Nan::New("x").ToLocalChecked(), Nan::New(pts[i].x));
    Nan::Set(obj, Nan::New("y").ToLocalChecked(), Nan::New(pts[i].y));
    Nan::Set(arr, i, obj);
    //vector<Point2f> to jsArray

  • MJM

    Make back-up > New fresh install > recover posts, users and data

    General Discussion
    1 Votes
    14 Posts
    5158 Views
    mananM

    @yariplus Ah...I was doing it on version 0.9.4 which did not have mongodb dependency listed in package.json. Had to install manually. Thanks. 😄

  • X

    Need some help with NodeJS in general :D

    General Discussion
    0 Votes
    5 Posts
    2242 Views
    frissdiegurkeF

    You know (one of) the main difference(s) between TCP and UDP, don't you?

    TCP is connection-oriented, UDP isn't. So there is no UDP core-functionality to check whether the receiver is alive (/has the port opened).

    You'd either need to create server-side code or know the server-behavior (e.g. responses to specific datagrams) to achieve an UDP port-scanner.

    If you're able to write server-side code the best is to ask for UDP port status via TCP since it has reliable data-transfer implemented.

  • B

    How do you guys persist data

    General Discussion
    0 Votes
    2 Posts
    1422 Views
    julianJ

    Hey @brizna,

    Please take a look at Redis' topics on Persistence to read about how it persists data to disk between server shutdowns/restarts.

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