org.magnum.dataup.VideoSvc.java Source code

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Here is the source code for org.magnum.dataup.VideoSvc.java

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/*
 * 
 * Copyright 2014 Jules White
 *
 * 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.magnum.dataup;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.atomic.AtomicLong;

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

import org.magnum.dataup.model.Video;
import org.magnum.dataup.model.VideoStatus;
import org.magnum.dataup.model.VideoStatus.VideoState;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;

@Controller
public class VideoSvc {

    /**
     * You will need to create one or more Spring controllers to fulfill the
     * requirements of the assignment. If you use this file, please rename it
     * to something other than "AnEmptyController"
     * 
     * 
        ________  ________  ________  ________          ___       ___  ___  ________  ___  __       
       |\   ____\|\   __  \|\   __  \|\   ___ \        |\  \     |\  \|\  \|\   ____\|\  \|\  \     
       \ \  \___|\ \  \|\  \ \  \|\  \ \  \_|\ \       \ \  \    \ \  \\\  \ \  \___|\ \  \/  /|_   
        \ \  \  __\ \  \\\  \ \  \\\  \ \  \ \\ \       \ \  \    \ \  \\\  \ \  \    \ \   ___  \  
    \ \  \|\  \ \  \\\  \ \  \\\  \ \  \_\\ \       \ \  \____\ \  \\\  \ \  \____\ \  \\ \  \ 
     \ \_______\ \_______\ \_______\ \_______\       \ \_______\ \_______\ \_______\ \__\\ \__\
      \|_______|\|_______|\|_______|\|_______|        \|_______|\|_______|\|_______|\|__| \|__|
                                                                                                                                                                                                                                                                        
     * 
     */
    public static final String DATA_PARAMETER = "data";
    public static final String ID_PARAMETER = "id";
    public static final String VIDEO_SVC_PATH = "/video";
    public static final String VIDEO_DATA_PATH = VIDEO_SVC_PATH + "/{id}/data";
    private List<Video> videos = new ArrayList<Video>();
    private static final AtomicLong currentId = new AtomicLong(0L);

    // =========== HTTP Requests ==================
    // ================ START =====================
    @RequestMapping(value = VIDEO_SVC_PATH, method = RequestMethod.GET)
    public @ResponseBody Collection<Video> getVideoList() {
        return videos;
    }

    @RequestMapping(value = VIDEO_SVC_PATH, method = RequestMethod.POST)
    public @ResponseBody Video addVideo(@RequestBody Video v) {
        checkAndSetId(v);
        v.setDataUrl(getDataUrl(v.getId()));
        videos.add(v);
        return v;
    }

    @RequestMapping(value = VIDEO_DATA_PATH, method = RequestMethod.POST)
    public @ResponseBody VideoStatus setVideoData(@PathVariable(ID_PARAMETER) long id,
            @RequestParam(DATA_PARAMETER) MultipartFile videoData, HttpServletResponse response)
            throws IOException {
        VideoFileManager videoDataMgr = VideoFileManager.get();
        Video v = getVideoById(id);

        if (v != null) {
            videoDataMgr.saveVideoData(v, videoData.getInputStream());
        } else {
            response.setStatus(404);
        }

        return new VideoStatus(VideoState.READY);
    }

    @RequestMapping(value = VIDEO_DATA_PATH, method = RequestMethod.GET)
    public void getData(@PathVariable(ID_PARAMETER) long id, HttpServletResponse response) throws IOException {
        VideoFileManager videoDataMgr = VideoFileManager.get();
        Video v = getVideoById(id);

        if (v != null) {
            if (videoDataMgr.hasVideoData(v)) {
                videoDataMgr.copyVideoData(v, response.getOutputStream());
            }
        } else {
            response.setStatus(404);
        }
    }

    // =========== HTTP Requests ==================
    // ================= END ======================
    // Method used to set random (diff from 0) id to any given video object
    private void checkAndSetId(Video entity) {
        if (entity.getId() == 0) {
            entity.setId(currentId.incrementAndGet());
        }
    }

    private String getDataUrl(long videoId) {
        String url = getUrlBaseForLocalServer() + "/video/" + videoId + "/data";
        return url;
    }

    private String getUrlBaseForLocalServer() {
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes())
                .getRequest();
        String base = "http://" + request.getServerName()
                + ((request.getServerPort() != 80) ? ":" + request.getServerPort() : "");
        return base;
    }

    private Video getVideoById(long id) {
        for (Video v : videos) {
            if (v.getId() == id) {
                return v;
            }
        }
        return null;
    }
}