Hello,
>From the FAQ about PDFBox being thread safe, it says one can have multiple
threads each accessing their own PDDocument object.
I have a question about this. Here's some pseudo Scala code I use to load a
document, find its children, then parse those children using a
PDFTextStriperByArea:
<code>
val pdf = PDDocument.load(new File("/path/to/pdf"), true)
val cos = pdf.getDocumentCatalog().getPages().getCOSObject()
val kids = cos.getDictionaryObject(COSName.KIDS).asInstanceOf[COSArray]
// some logic to iterate through the children by index i:
val kid: COSDictionary = kids.getObject(i)
// XXX
if (COSName.PAGE.equals(kid.getDictionaryObject(COSName.TYPE))) {
// definitely a kid. Process!
// ... set up the stripper, set up bounding boxes, etc ...
stripper.extractRegions(new PDPage(kid))
}
</code>
The thing is, at point XXX I want to send the 'kid' off to another thread
for asynchronous processing.
How would I go about getting a handle on the underlying file as loaded by
PDDocument?
Do I just instantiate a PDDocument in each async thread and get the i-th
kid then process it?
I've tried this, but get "Too many open files".
Any good examples of how this can be done?
Thank you,
Juan
