将spring bean注入自定义的logback过滤器 [英] Inject spring bean into custom logback filter

问题描述

为了减少应用程序中存在的日志记录数量，我们决定 启用/禁用基于每个客户端的某些方法的日志记录.

in order to reduce the amount of logging present in our application, we decided to enable/disable logging of certain methods on a per-client basis.

public class LoggingFilter extends Filter<ILoggingEvent> {

@Autowired
private MethodNameValidator validator;

@Override
public FilterReply decide(ILoggingEvent event) {
    Map<String, String> mdcProperties = event.getMDCPropertyMap();

    if (mdcProperties.isEmpty()) {
        return FilterReply.ACCEPT;
    }

    String accountId = mdcProperties.get(MDCUtil.ACCOUNT_ID);
    String methodName = mdcProperties.get(MDCUtil.METHOD_NAME);

    if (validator.isValidMethodName(accountId, methodName)) {
        return FilterReply.ACCEPT;
    }

    return FilterReply.DENY;
}

}

上面定义的自定义过滤器具有一个验证组件，在其中实现了方法验证逻辑.

The custom filter defined above has a validation component in which the method validation logic is implemented.

验证器是Spring Bean(也通过JMX公开用于外部配置).

The validator is a Spring Bean (which is also exposed via JMX for external configuration).

我无法将MethodNameValidator bean注入到过滤器中.

I fail to inject the MethodNameValidator bean into the filter.

过滤器也是bean.

有没有办法做到这一点?

Is there a way to achieve this?

如果我可以动态设置回退过滤器 然后我可以将过滤器初始化为bean，获取所需的记录器 按名称并应用过滤器.

If I could set a logback filter dynamically then I could initialize my filter as a bean, get the desired logger by name and apply the filter.

无法弄清楚如何通过提供的Logback api进行操作.

Can't figure out how to do it via the provided Logback api.

推荐答案

这对我有用.

@Component
public class DiscoveringPostProcessor implements BeanPostProcessor, ApplicationContextAware {

    ApplicationContext applicationContext;

    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        // TODO Auto-generated method stub
        return bean;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {

        if(bean instanceof CustomLoggingFilter){
            Map<String, TurboFilter> filterBeans = applicationContext.getBeansOfType(TurboFilter.class);
            for (TurboFilter filter : filterBeans.values()) {
                LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
                loggerContext.addTurboFilter(filter);
            }
        }
        return bean;

    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

}

2.

@Named("customLoggingFilter")
public class CustomLoggingFilter extends TurboFilter {

    @Autowired
    private TestService ts;

    @Override
    public FilterReply decide(Marker marker, Logger logger, Level level, String format, Object[] params, Throwable t) {
        System.out.println(ts.doTest());
        return FilterReply.ACCEPT;
    }
}

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