buf.append("\"memory\":{");
        buf.append("\"physical\":{");
        append(buf, "free", () -> osProbe.getFreePhysicalMemorySize()).append(',');
        append(buf, "total", () -> osProbe.getTotalPhysicalMemorySize());
        buf.append("},");
        buf.append("\"swap_space\":{");
        append(buf, "free", () -> osProbe.getFreeSwapSpaceSize()).append(',');

        osMemoryObj.physical = osMemoryPhysicalObj;
        osMemoryPhysicalObj.free = osProbe.getFreePhysicalMemorySize();
        osMemoryPhysicalObj.total = osProbe.getTotalPhysicalMemorySize();
        final OsMemorySwapSpaceObj osMemorySwapSpaceObj = new OsMemorySwapSpaceObj();
        osMemoryObj.swapSpace = osMemorySwapSpaceObj;
        osMemorySwapSpaceObj.free = osProbe.getFreeSwapSpaceSize();