JaxrsAsyncServletPrintingErrorHandler.java

package org.jboss.resteasy.test.asynch.resource;

import org.jboss.logging.Logger;

import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;

@Provider
public class JaxrsAsyncServletPrintingErrorHandler implements ExceptionMapper<Throwable> {
    private Logger logger = Logger.getLogger(JaxrsAsyncServletApp.class);

    @Override
    public Response toResponse(Throwable throwable) {
        StringWriter errors = new StringWriter();
        throwable.printStackTrace(new PrintWriter(errors));
        logger.error(errors.toString());

        Writer result = new StringWriter();
        PrintWriter printWriter = new PrintWriter(result);
        throwable.printStackTrace(printWriter);
        return Response.status(Response.Status.NOT_ACCEPTABLE).entity(result.toString())
                .build();
    }

}