在java中使用CDI注入多个log4j记录器类型

时间:2017-05-29 07:21:33

标签: java java-ee dependency-injection log4j cdi


我在log4j配置文件中有多个RollingFileAppender,以便管理不同的日志类型。
这是我的 LoggerFactory 类:

public class LoggerFactory {

    static {
        BasicConfigurator.configure();
    }

    @Produces
    public Logger produceLog(InjectionPoint ip) {
        return Logger.getLogger(ip.getMember().getDeclaringClass().getName());
    }

    @Produces
    @LogType(loggerType = LogType.LoggerType.CRITICAL)
    public Logger produceCriticalLogger(InjectionPoint injectionPoint) {
        return Logger.getLogger("critical");
    }

    @Produces
    @LogType(loggerType = LogType.LoggerType.SERVICE_TIMING)
    public Logger produceServiceTimingLogger(InjectionPoint injectionPoint) {
        return Logger.getLogger("serviceTiming");
    }

    @Produces
    @LogType(loggerType = LogType.LoggerType.HEALTH)
    public Logger produceHealthLogger(InjectionPoint injectionPoint) {
        return Logger.getLogger("health");
    }

    @Produces
    @LogType(loggerType = LogType.LoggerType.HTTP_HEADER)
    public Logger produceHttpLogger(InjectionPoint injectionPoint) {
        return Logger.getLogger("httpHeader");
    }

    @Produces
    @LogType(loggerType = LogType.LoggerType.POSTED_REQUEST)
    public Logger producePostRequestLogger(InjectionPoint injectionPoint) {
        System.out.println(" ********* getAnnotated" + injectionPoint.getAnnotated());
        System.out.println(injectionPoint.toString());

        return Logger.getLogger("postedRequest");
    }

    @Produces
    @LogType(loggerType = LogType.LoggerType.DB_TIMING)
    public Logger produceDbTimingLogger(InjectionPoint injectionPoint) {
        return Logger.getLogger("dbTiming");
    }

    @Produces
    @LogType(loggerType = LogType.LoggerType.STACK_TRACE)
    public Logger produceStackTraceLogger(InjectionPoint injectionPoint) {
        return Logger.getLogger("stackTrace");
    }

    @Produces
    @LogType(loggerType = LogType.LoggerType.TRANSACTIONAL)
    public Logger produceTransactionsLogger(InjectionPoint injectionPoint) {
        return Logger.getLogger("transactions");
    }
}

这是我的注释

@Qualifier
@Retention(RetentionPolicy.RUNTIME)
@Target({FIELD, METHOD, TYPE})
public @interface LogType {

    LoggerType loggerType();

    public enum LoggerType {
        CRITICAL,
        DB_TIMING,
        HEALTH,
        HTTP_HEADER,
        POSTED_REQUEST,
        SERVICE_TIMING,
        STACK_TRACE,
        TRANSACTIONAL
    }
}

这是我的注入点

   @Inject
    @LogType(loggerType = LogType.LoggerType.HEALTH)
    public transient Logger logger;

我收到此错误:

 Unsatisfied dependencies for type Logger with qualifiers @LogType
  at injection point [BackedAnnotatedField] @Inject @LogType public transient myclass.logger

其他信息
我的项目中有更多的注入点,它们工作正常,我对WELD库的健康状况有所了解......我在IDE中看到了bean图标,它将我链接到了producer方法。但我仍然无法找到问题!
 的问题
使用CDI实现多个记录器类型的最佳实践是什么?

1 个答案:

答案 0 :(得分:0)

将您的制作人类LoggerFactory制作成CDI Bean。在您的示例中,它是一个没有ani CDI注释的简单类。例如,您可以将其设为@ApplicationScoped或使用任何其他合适的范围。

或者,您可以将bean发现模式设置为" all"在beans.xml中。这样,即使在应用程序启动期间也会发现未注释的bean。