如何在Google Guice中使用Jersey ExceptionMapper? [英] How do I use a Jersey ExceptionMapper with Google Guice?

问题描述

我正在使用Jersey Guice，需要配置自定义ExceptionMapper

I am using Jersey Guice and need to configure a custom ExceptionMapper

我的模块如下:

public final class MyJerseyModule extends JerseyServletModule
{
   @Override
   protected void configureServlets()
   {
      ...
      filter("/*").through(GuiceContainer.class);
      ...
   }
}

这是我的ExceptionMapper:

import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.ext.ExceptionMapper;

public class MyExceptionMapper implements ExceptionMapper<MyException>
{
   @Override
   public Response toResponse(final MyException exception)
   {
      return Response.status(Status.NOT_FOUND).entity(exception.getMessage()).build();
   }
}

推荐答案

您的ExceptionMapper必须使用@Provider进行注释，并且必须是Singleton.

Your ExceptionMapper must be annotated with @Provider and be a Singleton.

import com.google.inject.Singleton;

import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;

@Provider
@Singleton
public class MyExceptionMapper implements ExceptionMapper<MyException>
{
   @Override
   public Response toResponse(final MyException exception)
   {
      return Response.status(Status.NOT_FOUND).entity(exception.getMessage()).build();
   }
}

然后将ExceptionMapper绑定到与JerseyServletModule相同的Injector中的一个Guice模块中，然后Jersey Guice会自动找到它.

Then just bind the ExceptionMapper in one of the Guice modules in the same Injector where your JerseyServletModule, and Jersey Guice will find it automatically.

import com.google.inject.AbstractModule;

public class MyModule extends AbstractModule
{
   @Override
   protected void configure()
   {
      ...
      bind(MyExceptionMapper.class);
      ...
   }
}

如果需要，还可以将其直接绑定到JerseyServletModule中:

You can also directly bind it in the JerseyServletModule if you want to:

public final class MyJerseyModule extends JerseyServletModule
{
   @Override
   protected void configureServlets()
   {
      ...
      filter("/*").through(GuiceContainer.class);
      bind(MyExceptionMapper.class);
      ...
   }
}

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