将Jersey实体记录为JSON作为响应 [英] Log Jersey entity as JSON as response

问题描述

我是泽西新手，我需要记录JSON响应。我希望将实体转换为JSON，就像Jersey框架所做的那样（相同的映射器等）。有没有办法提取它的映射器（并调用，例如，它的writeValueAsString）？

I'm a Jersey newbie and I need to log the JSON response. I wish to take the entity and convert it to JSON exactly as done by the Jersey framework does (same mapper, etc.). Is there a way to extract its mapper (and call, for example, its writeValueAsString)?

推荐答案

你没有指定哪个你用来制作JSON响应的包（你没有解释你的球衣服务器），但我假设你使用 Jackson 。

You don't specify which package you use for producing the JSON response (neither you explain much about your jersey server), but I will assume you use Jackson.

你在泽西岛有一些追踪，看看这里，但我知道它并不能满足您的需求。

You have some tracing in Jersey, take a look here, but as fas as I know it does not do what you need.

但首先你应该实现 LoggingFilter ，

public class YourLoggingFilter implements ContainerResponseFilter {

    @Override
    public void filter(final ContainerRequestContext requestContext, final ContainerResponseContext responseContext)
            throws IOException {
        ...

    }

}

我认为你已经扩展了d ResourceConfig 类添加资源，您需要在此处添加新过滤器：

And I assume you extend the ResourceConfig class to add resources, you need to add the new filter here:

public class YourApplication extends ResourceConfig {

    public YourApplication() {
        super();

        register(YourAuthenticationRequestFilter.class, Priorities.AUTHENTICATION);
        register(YourExceptionMapper.class);
        register(YourLoggingFilter.class);

        packages("...");
    }
}

最后，一种在内部记录响应的简单方法 YourLoggingFilter 将是（这里我假设 Jackson ，但这只是一个例子，我不知道你用什么记录器正在使用，但每次请求时都不要打开文件!!!）

And finally, a simple way to log your response inside YourLoggingFilter would be (here I assume Jackson, but this is just an example, I don't know what logger you are using, but don't open a file every time you do a request!!!)

Object obj = responseContext.getEntity();
ObjectMapper om = new ObjectMapper();
File file = new File("...");
try {
    OutputStream out = new FileOutputStream(file);
    om.writeValue(out, obj);
} catch (IOException e) {
    // this could fail but you don't want your request to fail
    e.printStackTrace();
}

希望有所帮助。

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