泽西岛2.0和Moxy内部服务器错误，但没有服务器日志 [英] Jersey 2.0 and Moxy Internal Server Error But No Server Log

问题描述

我遵循了Jersey 2.0文档( https://jersey.java.net/documentation/latest/user-guide.html#json.moxy )，修改后的pom.xml，包括jersey-media-moxy构件，已编译并安装.对于Produce和Consume案例，我都可以获得从POJO到JSON的基本映射工作.

I followed the Jersey 2.0 document (https://jersey.java.net/documentation/latest/user-guide.html#json.moxy), modified pom.xml, included jersey-media-moxy artifact, compiled and installed. I could get basic POJO to JSON mapping work for both Produces and Consumes cases.

但是，当我尝试使用一些具有复杂数据类型的POJO作为资源返回类型时，出现了很多Status 500 Internal Server Error，但没有任何服务器日志.这很烦人.有人知道这是一个错误还是我错过了配置中的某些内容?

However, when I tried with some POJO with complex data type as resource return type, I got a lot Status 500 Internal Server Error but without any server log. It is very annoying. Does anybody know if it is a bug or I missed something in configuration?

顺便说一句，为了对POJO对象使用Moxy映射，POJO需要有一个空的参数构造函数.还有其他要求吗?

By the way, in order to use Moxy mapping for a POJO object, the POJO needs to have a empty parameter constructor. Are there any other requirements?

推荐答案

我遇到了同样的问题，并发现了这篇文章:

I had the same problem and found this post:

• http://jersey.576304.n2.nabble .com/Missing-MOXy-Log-Messages-In-Tomcat-td7580992.html

作者实现了ApplicationEventListener来记录Moxy抛出的异常.这是我的实现(需要在您的应用程序中注册):

The author implemented ApplicationEventListener to log the exceptions thrown by Moxy. This is my implementation (needs to be registered in your application):

public class ExceptionListener implements ApplicationEventListener {

    @Override
    public void onEvent(ApplicationEvent event) {

    }

    @Override
    public RequestEventListener onRequest(RequestEvent requestEvent) {
        return new ExceptionRequestEventListener();
    }

    public static class ExceptionRequestEventListener implements RequestEventListener{
        private final Logger logger;

        public ExceptionRequestEventListener(){
            logger = Logger.getLogger(getClass());
        }

        @Override
        public void onEvent(RequestEvent event) {
            switch (event.getType()){
                case ON_EXCEPTION:
                    Throwable t = event.getException();
                    logger.error("Found exception for requestType: "+event.getType(), t);
            }
        }
    }
}

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