gracelog/buffer.js at develop · voltrue2/gracelog · GitHub

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var buff = {
    verbose: { data: [], size: 0 },
    sys: { data: [], size: 0 },
    debug: { data: [], size: 0 },
    trace: { data: [], size: 0 },
    info: { data: [], size: 0 },
    warn: { data: [], size: 0 },
    error: { data: [], size: 0 },
    fatal: { data: [], size: 0 }
};
// default 8 KB
var limit = 8192;

module.exports.setup = function (size) {
    if (size !== undefined && size !== null) {
        limit = size;
    }
};

module.exports.add = function (level, msg) {
    buff[level].data.push({
        msg: msg.message,
        time: msg.timestamp
    });
    buff[level].size += Buffer.byteLength(msg.message);

    if (buff[level].size > limit) {
        return module.exports.flush(level);
    }

    return null;
};

module.exports.flush = function (level) {
    if (buff[level].size) {
        var data = buff[level].data;
        buff[level].data = [];
        buff[level].size = 0;
        return data;
    }
    return null;
};

module.exports.flushAll = function () {
    var flushed = {};
    for (var level in buff) {
        flushed[level] = module.exports.flush(level);
    }
    return flushed;
};