com.threewks.thundr.servlet.ServletExceptionViewResolver.java Source code

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Here is the source code for com.threewks.thundr.servlet.ServletExceptionViewResolver.java

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/*
 * This file is a component of thundr, a software library from 3wks.
 * Read more: http://3wks.github.io/thundr/
 * Copyright (C) 2015 3wks, <thundr@3wks.com.au>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.threewks.thundr.servlet;

import java.io.IOException;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;

import com.threewks.thundr.http.StatusCode;
import com.threewks.thundr.request.Response;
import com.threewks.thundr.view.ViewResolutionException;
import com.threewks.thundr.view.exception.ExceptionViewResolver;

public class ServletExceptionViewResolver extends ExceptionViewResolver {

    @Override
    protected void renderException(Response resp, Throwable exceptionOfInterest) {
        HttpServletResponse rawResponse = resp.getRawResponse(HttpServletResponse.class);
        if (rawResponse == null) {
            super.renderException(resp, exceptionOfInterest);
        } else {
            sendError(exceptionOfInterest, rawResponse);
        }
    }

    protected void sendError(Throwable exceptionOfInterest, HttpServletResponse rawResponse) {
        try {
            String message = exceptionOfInterest == null ? ""
                    : StringUtils.trimToEmpty(exceptionOfInterest.getMessage());
            rawResponse.sendError(StatusCode.InternalServerError.getCode(), message);
        } catch (IOException e) {
            throw new ViewResolutionException(e, "Failed to send error to client: %s", e.getMessage());
        }
    }

    @Override
    public String toString() {
        return this.getClass().getSimpleName();
    }
}