Category.java 文件源码

static Category getInstance(final LoggerContext context, final String name, final LoggerFactory factory) {
    final ConcurrentMap<String, Logger> loggers = getLoggersMap(context);
    Logger logger = loggers.get(name);
    if (logger != null) {
        return logger;
    }
    logger = factory.makeNewLoggerInstance(context, name);
    final Logger prev = loggers.putIfAbsent(name, logger);
    return prev == null ? logger : prev;
}