SpringNettyConfiguration.java 文件源码

private <T> Supplier<T> createHandlerBeanSupplier(final T h, final Class<? extends T> handlerClass,
                                                  final String beanName) {

    final ChannelHandler.Sharable sharable = findAnnotation(handlerClass, ChannelHandler.Sharable.class);
    if (sharable == null) {
        final Scope scope = findAnnotation(handlerClass, Scope.class);
        if ((scope == null) || !ConfigurableBeanFactory.SCOPE_PROTOTYPE.equals(scope.value())) {
            throw new IllegalStateException("Non-sharable handler should be presented by a " +
                    "prototype bean");
        }
    }

    return (sharable == null) ?
            () -> beanFactory.getBean(beanName, handlerClass) :
            () -> h;
}