Mercurial > hg > digilib-old

annotate servlet3/src/main/java/digilib/servlet/AsyncServletWorker.java @ 903:7779b37d1d05

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refactored into maven modules per servlet type. can build servlet-api 2.3 and 3.0 via profile now!
author robcast
date Tue, 26 Apr 2011 20:24:31 +0200
parents servlet/src/main/java/digilib/servlet/AsyncServletWorker.java@ba1eb2d821a2
children 66f1ba72d07b
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1 /**
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2 *
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3 */
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4 package digilib.servlet;
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5
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6 import java.io.IOException;
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7
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8 import javax.servlet.AsyncContext;
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9 import javax.servlet.ServletException;
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10 import javax.servlet.http.HttpServletResponse;
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11
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12 import org.apache.log4j.Logger;
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13
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14 import digilib.image.DocuImage;
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15 import digilib.image.ImageJobDescription;
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16 import digilib.image.ImageOpException;
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17 import digilib.image.ImageWorker;
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18 import digilib.servlet.Scaler.ErrMsg;
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19 import digilib.servlet.Scaler.Error;
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20
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21 /**
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22 * @author casties
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23 *
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24 */
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25 public class AsyncServletWorker implements Runnable {
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26
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27 /** the AsyncServlet context */
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28 private AsyncContext asyncContext;
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29
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30 /** the ImageWorker we use */
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31 private ImageWorker imageWorker;
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32
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33 protected static Logger logger = Logger.getLogger(AsyncServletWorker.class);
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34 private long startTime;
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35 private ErrMsg errMsgType = ErrMsg.IMAGE;
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36 private ImageJobDescription jobinfo;
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37
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38 /**
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39 * @param dlConfig
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40 * @param jobinfo
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41 */
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42 public AsyncServletWorker(DigilibConfiguration dlConfig,
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43 ImageJobDescription jobinfo, AsyncContext asyncContext,
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44 ErrMsg errMsgType, long startTime) {
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45 // set up image worker
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46 imageWorker = new ImageWorker(dlConfig, jobinfo);
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47 // save AsyncContext
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48 this.asyncContext = asyncContext;
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49 this.startTime = startTime;
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50 this.errMsgType = errMsgType;
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51 this.jobinfo = jobinfo;
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52 }
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53
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54 /**
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55 * runs the ImageWorker and writes the image to the ServletResponse.
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56 */
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57 public void run() {
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58 // get fresh response
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59 HttpServletResponse response = (HttpServletResponse) asyncContext.getResponse();
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60 logger.debug("working on response: (" + ServletOps.headersToString(response) + ")");
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61 try {
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62 // render the image
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63 DocuImage img = imageWorker.call();
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64 // forced destination image type
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65 String mt = null;
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66 if (jobinfo.hasOption("jpg")) {
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67 mt = "image/jpeg";
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68 } else if (jobinfo.hasOption("png")) {
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69 mt = "image/png";
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70 }
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71 // send image
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72 ServletOps.sendImage(img, mt, response, logger);
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73 logger.debug("Job done in: "
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74 + (System.currentTimeMillis() - startTime) + "ms");
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75 } catch (ImageOpException e) {
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76 logger.error(e.getClass() + ": " + e.getMessage());
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77 Scaler.digilibError(errMsgType, Error.IMAGE, null, response);
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78 } catch (IOException e) {
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79 logger.error(e.getClass() + ": " + e.getMessage());
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80 Scaler.digilibError(errMsgType, Error.FILE, null, response);
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81 } catch (ServletException e) {
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82 logger.error("Servlet error: ", e);
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83 } catch (Exception e) {
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84 logger.error("Other error: ", e);
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85 } finally {
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86 // submit response
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87 logger.debug("context complete.");
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88 logger.debug("response: (" + ServletOps.headersToString(response) + ")");
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89 asyncContext.complete();
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90 }
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91
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92 }
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93
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94 }