io.apiman.test.integration.deployment.servlet.EchoServlet.java Source code

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Here is the source code for io.apiman.test.integration.deployment.servlet.EchoServlet.java

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/*
 * Copyright 2016 Red Hat Inc.
 *
 * 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 io.apiman.test.integration.deployment.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

/**
 * Simple echo servlet - for testing the gateway.
 *
 * @author eric.wittmann@redhat.com
 */
public class EchoServlet extends HttpServlet {

    private static final long serialVersionUID = 3185466526830586555L;
    private static ObjectMapper mapper = new ObjectMapper();

    static {
        mapper.enable(SerializationFeature.INDENT_OUTPUT);
    }

    /**
     * Constructor.
     */
    public EchoServlet() {
    }

    /**
     * @see HttpServlet#doOptions(HttpServletRequest, HttpServletResponse)
     */
    @Override
    protected void doOptions(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        doEchoResponse(req, resp, false);
    }

    /**
     * @see HttpServlet#doHead(HttpServletRequest, HttpServletResponse)
     */
    @Override
    protected void doHead(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doEchoResponse(req, resp, false);
    }

    /**
     * @see HttpServlet#doTrace(HttpServletRequest, HttpServletResponse)
     */
    @Override
    protected void doTrace(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doEchoResponse(req, resp, false);
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest, HttpServletResponse)
     */
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doEchoResponse(req, resp, false);
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest, HttpServletResponse)
     */
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doEchoResponse(req, resp, true);
    }

    /**
     * @see HttpServlet#doPut(HttpServletRequest, HttpServletResponse)
     */
    @Override
    protected void doPut(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doEchoResponse(req, resp, true);
    }

    /**
     * @see HttpServlet#doDelete(HttpServletRequest, HttpServletResponse)
     */
    @Override
    protected void doDelete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doEchoResponse(req, resp, false);
    }

    /**
     * Responds with a comprehensive echo.  This means bundling up all the
     * information about the inbound request into a java bean and responding
     * with that data as a JSON response.
     * @param req
     * @param resp
     * @param withBody
     */
    protected void doEchoResponse(HttpServletRequest req, HttpServletResponse resp, boolean withBody) {
        EchoResponse response = EchoResponse.from(req, withBody);

        resp.setContentType("application/json"); //$NON-NLS-1$
        try {
            mapper.writeValue(resp.getOutputStream(), response);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}