> -----Original Message-----
> From: John Pruitt [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, December 20, 2005 5:19 PM
> To: Paulo Soares
> Cc: [email protected]
> Subject: Re: [iText-questions] Possible File Resource Leak
>
> To create the PdfReader:
> if (strPassword != null)
> {
> reader = new PdfReader(strFile, strPassword.getBytes());
> }
> else
> {
> reader = new PdfReader(strFile);
> }
>
> Then, I get a copy of the RandomAccessFileOrArray:
> file = reader.getSafeFile();
> file.reOpen();
>
You don't need this but if you do it wrap the close in a finally block.
reader.close() won't close it.
> Extracting the stream is kinda complex. I use
> reader.getPageN() to get
> the PdfDictionary for each page, and pass it to the following
> recursive
> function which walks through the pdf until it gets to the
> single image
> stream for the page, and returns it.
> private PRStream getImageStream(PdfObject obj, int page)
> {
> PdfName im = new PdfName("Im" + page);
> PdfName xf = new PdfName("Xf" + page);
> PdfDictionary dict;
> if (obj.isStream())
> {
> dict = (PdfDictionary)((PRStream)obj).get(PdfName.RESOURCES);
> }
> else
> {
> dict =
> (PdfDictionary)((PdfDictionary)obj).get(PdfName.RESOURCES);
> }
>
> dict = (PdfDictionary)dict.get(PdfName.XOBJECT);
> if (dict.contains(im))
> {
> return (PRStream)PdfReader.getPdfObject(dict.get(im));
> }
> return
> getImageStream(PdfReader.getPdfObject(dict.get(xf)), page);
> }
>
> Next, I use PdfReader.getStreamBytesRaw() to get the raw
> bytes for the
> image stream.
> Then, I use TIFFFaxDecoder to decode the byte stream (our images are
> CCITT fax encoded).
> Finally, I use JAI functionality to wrap a BufferedImage
> around the byte
> stream and use TIFFImageEncoder to encode the image to a
> FileOutputStream.
> Works like a charm except for the "too many files open"
> exception every
> few thousand or so pdfs.
> John Pruitt
>
> Paulo Soares wrote:
>
> >How are you creating the PdfReader? How are you extracting
> the stream?
> >
> >
> >
> >>-----Original Message-----
> >>From: John Pruitt [mailto:[EMAIL PROTECTED]
> >>Sent: Tuesday, December 20, 2005 4:38 PM
> >>To: Paulo Soares
> >>Cc: [email protected]
> >>Subject: Re: [iText-questions] Possible File Resource Leak
> >>
> >>Actually, I am converting pdfs to tiff. We have a special
> >>case where our
> >>pdfs all consist of full-page images. I use iText to get to
> the image
> >>streams in the pdf, and use JAI to encode the images to tiff.
> >>I am closing both the RandomAccessFileOrArray, and the
> >>PdfReader I use
> >>(although I think PdfReader.close() also closes the
> >>RandomAccessFileOrArray). Is there anything else I need to close?
> >>John Pruitt
> >>
> >>Paulo Soares wrote:
> >>
> >>
> >>
> >>>I suppose you are converting tiff to pdf and not the other
> >>>
> >>>
> >>way around.
> >>
> >>
> >>>Check that your code is something like this:
> >>>
> >>>RandomAccessFileOrArray ra = null;
> >>>try {
> >>> ra = new RandomAccessFileOrArray(imgb);
> >>> Image img = TiffImage.getTiffImage(ra, 1);
> >>> return img;
> >>>} finally {
> >>> if (ra != null)
> >>> ra.close();
> >>>}
> >>>
> >>>It will make sure that the file is closed if some exception
> >>>
> >>>
> >>is throwned.
> >>
> >>
> >>>
> >>>
> >>>
> >>>
> >>>>-----Original Message-----
> >>>>From: [EMAIL PROTECTED]
> >>>>[mailto:[EMAIL PROTECTED] On
> >>>>Behalf Of John Pruitt
> >>>>Sent: Tuesday, December 20, 2005 3:15 PM
> >>>>To: [email protected]
> >>>>Subject: [iText-questions] Possible File Resource Leak
> >>>>
> >>>>I have a program that basically batch converts pdfs to
> >>>>multi-page tiffs
> >>>>using iText. I am running into a problem. In my testing,
> I had the
> >>>>program batch convert 12,000 pdf files to multi-page tiff.
> >>>>The program
> >>>>worked like a charm for 8 hours, then it hit an exception:
> >>>>"To many open
> >>>>files." The program logged the exception and continued for 8
> >>>>more hours
> >>>>before hitting the same exception again. After that, the
> >>>>exception came
> >>>>more frequently, every 2 hours or so.
> >>>>I have checked my code, and am closing file streams as I
> >>>>
> >>>>
> >>finish with
> >>
> >>
> >>>>them. I was wondering how likely it is that iText may not
> >>>>
> >>>>
> >>be properly
> >>
> >>
> >>>>releasing resources, and where I should look in the code to see.
> >>>>Thank you,
> >>>>John Pruitt
> >>>>
> >>>>
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> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>
> >>
>
>
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