Mercurial > hg > digilib-old
annotate servlet/src/digilib/pdf/PDFStreamWorker.java @ 817:0b4345866797 stream
fix to log message. fixed jar creation.
| author | robcast |
|---|---|
| date | Mon, 21 Feb 2011 10:24:48 +0100 |
| parents | 72662bb585ba |
| children |
| rev | line source |
|---|---|
| 557 | 1 package digilib.pdf; |
| 546 | 2 |
| 3 import java.io.IOException; | |
| 4 import java.io.OutputStream; | |
| 5 import java.util.concurrent.Callable; | |
| 6 import java.util.concurrent.ExecutionException; | |
| 7 import java.util.concurrent.Future; | |
| 8 | |
| 9 import org.apache.log4j.Logger; | |
| 10 | |
| 11 import com.itextpdf.text.Document; | |
| 12 import com.itextpdf.text.DocumentException; | |
| 13 import com.itextpdf.text.Image; | |
| 14 import com.itextpdf.text.PageSize; | |
| 15 import com.itextpdf.text.pdf.PdfWriter; | |
| 16 | |
| 17 import digilib.image.DocuImage; | |
| 557 | 18 import digilib.image.ImageJobDescription; |
| 19 import digilib.image.ImageWorker; | |
| 20 import digilib.servlet.DigilibConfiguration; | |
| 21 import digilib.servlet.PDFRequest; | |
| 22 import digilib.util.DigilibJobCenter; | |
| 23 import digilib.util.NumRange; | |
| 546 | 24 |
| 25 public class PDFStreamWorker implements Callable<OutputStream> { | |
| 26 | |
| 548 | 27 protected static Logger logger = Logger.getLogger(PDFStreamWorker.class); |
| 546 | 28 |
| 548 | 29 protected DigilibConfiguration dlConfig = null; |
| 546 | 30 |
| 548 | 31 protected Document doc = null; |
| 546 | 32 |
| 548 | 33 protected OutputStream outstream = null; |
| 546 | 34 |
| 557 | 35 protected PDFRequest job_info = null; |
| 546 | 36 |
| 548 | 37 protected DigilibJobCenter<DocuImage> imageJobCenter = null; |
| 546 | 38 |
| 39 /** | |
| 40 * @param dlConfig | |
| 41 * @param outputfile | |
| 42 * @param job_info | |
| 43 */ | |
| 44 public PDFStreamWorker(DigilibConfiguration dlConfig, OutputStream outputfile, | |
| 557 | 45 PDFRequest job_info, |
| 546 | 46 DigilibJobCenter<DocuImage> imageJobCenter) { |
| 47 super(); | |
| 48 this.dlConfig = dlConfig; | |
| 49 this.outstream = outputfile; | |
| 50 this.job_info = job_info; | |
| 51 this.imageJobCenter = imageJobCenter; | |
| 52 } | |
| 53 | |
| 54 public OutputStream call() throws Exception { | |
| 55 outstream = renderPDF(); | |
| 56 return outstream; | |
| 57 } | |
| 58 | |
| 59 /** | |
| 60 * @throws DocumentException | |
| 61 * @throws InterruptedException | |
| 62 * @throws ExecutionException | |
| 63 * @throws IOException | |
| 64 */ | |
| 65 protected OutputStream renderPDF() throws DocumentException, InterruptedException, | |
| 66 ExecutionException, IOException { | |
| 67 // create document object | |
| 68 doc = new Document(PageSize.A4, 0, 0, 0, 0); | |
| 69 PdfWriter docwriter = null; | |
| 70 | |
| 71 long start_time = System.currentTimeMillis(); | |
| 72 | |
| 73 docwriter = PdfWriter.getInstance(doc, outstream); | |
| 74 | |
| 75 setPDFProperties(doc); | |
| 76 | |
| 77 doc.open(); | |
| 78 | |
| 79 addTitlePage(doc); | |
| 80 | |
| 594 | 81 logger.debug("PDF: " + outstream + " doc.open()ed (" |
| 546 | 82 + (System.currentTimeMillis() - start_time) + "ms)"); |
| 83 | |
| 84 NumRange pgs = job_info.getPages(); | |
| 85 | |
| 86 for (int p : pgs) { | |
| 594 | 87 logger.debug("PDF: adding Image " + p + " to " + outstream); |
| 546 | 88 // create ImageJobInformation |
| 557 | 89 ImageJobDescription iji = ImageJobDescription.getInstance(job_info, job_info.getDlConfig()); |
| 546 | 90 iji.setValue("pn", p); |
| 91 addImage(doc, iji); | |
| 594 | 92 logger.debug("PDF: done adding Image " + p + " to " + outstream); |
| 546 | 93 } |
| 94 | |
| 594 | 95 logger.debug("PDF: done adding all Images to " + outstream); |
| 546 | 96 |
| 97 doc.close(); | |
| 594 | 98 logger.debug("PDF: " + outstream + " doc.close() (" |
| 546 | 99 + (System.currentTimeMillis() - start_time) + "ms)"); |
|
801
72662bb585ba
remove all ServletOutputStream.flush(). (stupid me ;-)
robcast
parents:
594
diff
changeset
|
100 docwriter.flush(); |
| 546 | 101 docwriter.close(); |
| 102 return outstream; | |
| 103 } | |
| 104 | |
| 105 /** | |
| 106 * Set PDF-Meta-Attributes. | |
| 107 */ | |
| 108 public Document setPDFProperties(Document doc) { | |
| 109 // TODO get proper Information from dlConfig | |
| 110 doc.addAuthor(this.getClass().getName()); | |
| 111 doc.addCreationDate(); | |
| 112 doc.addKeywords("digilib"); | |
| 113 doc.addTitle("digilib PDF"); | |
| 114 doc.addCreator(this.getClass().getName()); | |
| 115 return doc; | |
| 116 } | |
| 117 | |
| 118 /** | |
| 119 * Create a title page and append it to the document (should, of course, be | |
| 120 * called first) | |
| 121 * | |
| 122 * @throws DocumentException | |
| 123 */ | |
| 124 public Document addTitlePage(Document doc) throws DocumentException { | |
| 125 PDFTitlePage titlepage = new PDFTitlePage(job_info); | |
| 126 doc.add(titlepage.getPageContents()); | |
| 127 doc.newPage(); | |
| 128 return doc; | |
| 129 } | |
| 130 | |
| 131 /** | |
| 132 * adds an image to the document. | |
| 133 * | |
| 134 * @param doc | |
| 135 * @param iji | |
| 136 * @return | |
| 137 * @throws InterruptedException | |
| 138 * @throws ExecutionException | |
| 139 * @throws IOException | |
| 140 * @throws DocumentException | |
| 141 */ | |
| 547 | 142 public Document addImage(Document doc, ImageJobDescription iji) |
| 546 | 143 throws InterruptedException, ExecutionException, IOException, |
| 144 DocumentException { | |
| 145 // create image worker | |
| 548 | 146 ImageWorker job = new ImageWorker(dlConfig, iji); |
| 546 | 147 // submit |
| 548 | 148 Future<DocuImage> jobTicket = imageJobCenter.submit(job); |
| 546 | 149 // wait for result |
| 150 DocuImage img = jobTicket.get(); | |
| 151 // scale the image | |
| 152 Image pdfimg = Image.getInstance(img.getAwtImage(), null); | |
| 153 float docW = PageSize.A4.getWidth() - 2 * PageSize.A4.getBorder(); | |
| 154 float docH = PageSize.A4.getHeight() - 2 * PageSize.A4.getBorder(); | |
| 548 | 155 // TODO: do we really scale this again? |
| 546 | 156 pdfimg.scaleToFit(docW, docH); |
| 157 // add to PDF | |
| 158 doc.add(pdfimg); | |
| 159 return doc; | |
| 160 } | |
| 161 | |
| 162 } |