Method createWriter

core/src/main/java/io/questdb/log/LogFactory.java:456–539

(final Properties properties, String writerName)

    }

    @SuppressWarnings("rawtypes")
    private static LogWriterConfig createWriter(final Properties properties, String writerName) {
        final String writer = "w." + writerName + '.';
        final String clazz = getProperty(properties, writer + "class");
        final String levelStr = getProperty(properties, writer + "level");
        final String scope = getProperty(properties, writer + "scope");

        if (clazz == null) {
            return null;
        }

        final Class<?> cl;
        final Constructor constructor;
        try {
            cl = Class.forName(clazz);
            constructor = cl.getDeclaredConstructor(RingQueue.class, SCSequence.class, int.class);
        } catch (ClassNotFoundException e) {
            throw new LogError("Class not found " + clazz, e);
        } catch (NoSuchMethodException e) {
            throw new LogError("Constructor(RingQueue, Sequence, int) expected: " + clazz, e);
        }

        int level = 0;
        if (levelStr != null) {
            for (String s : levelStr.split(",")) {
                switch (s.toUpperCase()) {
                    case "DEBUG":
                        level |= LogLevel.DEBUG;
                        break;
                    case "INFO":
                        level |= LogLevel.INFO;
                        break;
                    case "ERROR":
                        level |= LogLevel.ERROR;
                        break;
                    case "CRITICAL":
                        level |= LogLevel.CRITICAL;
                        break;
                    case "ADVISORY":
                        level |= LogLevel.ADVISORY;
                        break;
                    default:
                        throw new LogError("Unknown level: " + s);
                }
            }
        }

        if (isForcedDebug()) {
            level = level | LogLevel.DEBUG;
        }

        // enable all LOG levels above the minimum set one
        // ((-1 >>> (msb-1)) << msb) | level
        final int msb = Numbers.msb(level);
        level = (((-1 >>> (msb - 1)) << msb) | level) & LogLevel.MASK;

        return new LogWriterConfig(scope == null ? EMPTY_STR : scope, level, (ring, seq, level1) -> {
            try {