org.ngrinder.infra.servlet.ResourceLocationConfigurableJnlpDownloadServlet.java Source code

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Here is the source code for org.ngrinder.infra.servlet.ResourceLocationConfigurableJnlpDownloadServlet.java

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/* 
 * 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 org.ngrinder.infra.servlet;

import jnlp.sample.servlet.JnlpDownloadServlet;
import org.apache.commons.collections.iterators.IteratorEnumeration;
import org.ngrinder.common.util.NoOp;
import org.ngrinder.infra.config.Config;
import org.python.google.common.collect.Maps;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Controller;
import org.springframework.web.HttpRequestHandler;
import org.springframework.web.context.ServletContextAware;

import javax.annotation.PostConstruct;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Map;

/**
 * {@link JnlpDownloadServlet} which forwards the download request to the home folder. This class is
 * mainly implemented by providing decorating {@link ServletContext}.
 *
 * @author JunHo Yoon
 */
@Profile("production")
@Controller("jnlpDownloadServlet")
public class ResourceLocationConfigurableJnlpDownloadServlet extends JnlpDownloadServlet
        implements HttpRequestHandler, ServletConfig, ServletContextAware {
    private static final Logger LOGGER = LoggerFactory
            .getLogger(ResourceLocationConfigurableJnlpDownloadServlet.class);
    /**
     * UID.
     */
    private static final long serialVersionUID = 2703216836987727946L;

    @Autowired
    private Config config;

    private ServletContext servletContext;

    /**
     * Wrap the given {@link ServletContext} instance with {@link ServletContextDelegate}, so that
     * it can redirect {@link ServletContext#getRealPath(String)}
     * {@link ServletContext#getResource(String)},
     * {@link ServletContext#getResourceAsStream(String)} to ${NGRINDER_HOME}/download/.
     *
     * @param servletContext raw {@link ServletContext}
     */

    @Override
    public void setServletContext(ServletContext servletContext) {
        if (servletContext instanceof ServletContextDelegate) {
            this.servletContext = servletContext;
        } else {
            this.servletContext = new ServletContextDelegate(servletContext,
                    this.config.getHome().getDownloadDirectory());
        }
    }

    /**
     * This method name should not be init. If it's init, there will be recursion calls.
     *
     * @throws ServletException exception
     */
    @PostConstruct
    public void initialize() throws ServletException {
        super.init(this);
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.springframework.web.HttpRequestHandler#handleRequest(javax.servlet.http.HttpServletRequest
     * , javax.servlet.http.HttpServletResponse)
     */
    @Override
    public void handleRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            // Forward the the request to existing JNLPDownloadServlet.
            LOGGER.debug("JNLP file is downloading : {}", request.getPathInfo());
            if ("GET".equals(request.getMethod())) {
                doGet(request, response);
            } else if ("HEAD".equals(request.getMethod())) {
                doHead(request, response);
            } else {
                doGet(request, response);
            }
        } catch (Exception e) {
            NoOp.noOp();
        }

    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.servlet.GenericServlet#getInitParameter(java.lang.String)
     */
    @Override
    public String getInitParameter(String name) {
        return initParam.get(name);
    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.servlet.GenericServlet#getServletName()
     */
    @Override
    public String getServletName() {
        return "jnlpDownloadServlet";
    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.servlet.GenericServlet#getServletContext()
     */
    @Override
    public ServletContext getServletContext() {
        return servletContext;
    }

    private Map<String, String> initParam = Maps.newHashMap();

    @Override
    public Enumeration<String> getInitParameterNames() {
        return new IteratorEnumeration(initParam.keySet().iterator());
    }
}