From: Damphyr <damphyr@...>
Date: 2006-02-02T03:00:31+09:00
Subject: PDF::Writer running out of memory

I have a bunch of XML files containing specifications and I want to 
create a PDF file with an overview of the description element from those 
XML files.
I parse the XML and convert it into a Spec object than I create the PDF 
using some attributes.
Now, the following code runs out of memory at about 53 out of 87 of 
those specs.
header and footer add a line and a bit of text (it's actually code 
adapted from the PDF::Writer Manual Techbook :) )

def create
   #creation time
   @time=Time.now.strftime("%d/%m/%Y - %H:%M")
   #main title/front page
   title
   #page header
   header
   #page footer
   footer
   @pdf.start_new_page
   @pdf.start_page_numbering(@pdf.absolute_right_margin, 36, 6,:right)
   specifications.each do |s|
     puts "doing #{s.name}"
     spec_table(s).render_on(@pdf)
   end
   return
end

def spec_table spec
   table=PDF::SimpleTable.new
   table.column_order=["row"]
   table.title=spec.title
   table.data=[{"row"=>spec.description}]
   table.show_headings=false
   table.width=@pdf.margin_width
   table.header_gap=20
   return table
end

Below is the backtrace.
Now before you all scream, I did reuse the SimpleTable object to avoid 
instantiating it for every spec. This did not make much difference, 
since the script run out of memory at exactly the same place.
Is there a solution to this problem or do I need to work around it?
Is there a workaround that gives me a single PDF at the end?
All I can think about now is breaking the overview doc in several pieces.
Keep in mind that the number of specs is only going to grow in the future.
Cheers,
V.-

-----------
d:/dev/ruby/lib/ruby/gems/1.8/gems/transaction-simple-1.3.0/lib/transaction/simple.rb:370:in 
`dump': failed to allocate memory (NoMemoryError) from 
d:/dev/ruby/lib/ruby/gems/1.8/gems/transaction-simple-1.3.0/lib/transaction/simple.rb:370:in 
`start_transaction'from 
d:/dev/ruby/lib/ruby/gems/1.8/gems/transaction-simple-1.3.0/lib/transaction/simple/group.rb:89:in
  `start_transaction'from 
d:/dev/ruby/lib/ruby/gems/1.8/gems/transaction-simple-1.3.0/lib/transaction/simple/group.rb:89:in
  `each'from 
d:/dev/ruby/lib/ruby/gems/1.8/gems/transaction-simple-1.3.0/lib/transaction/simple/group.rb:89:in
  `start_transaction' from 
d:/dev/ruby/lib/ruby/gems/1.8/gems/pdf-writer-1.1.3/lib/pdf/simpletable.rb:497:in 
`render_on' from 
d:/dev/ruby/lib/ruby/gems/1.8/gems/pdf-writer-1.1.3/lib/pdf/simpletable.rb:488:in 
`each' from 
d:/dev/ruby/lib/ruby/gems/1.8/gems/pdf-writer-1.1.3/lib/pdf/simpletable.rb:488:in 
`render_on' from 
d:/dev/ruby/lib/ruby/gems/1.8/gems/pdf-writer-1.1.3/lib/pdf/simpletable.rb:401:in 
`loop' from 
d:/dev/ruby/lib/ruby/gems/1.8/gems/pdf-writer-1.1.3/lib/pdf/simpletable.rb:401:in 
`render_on' from ./test.rb:524:in `create' from ./test.rb:522:in `each' 
from d:/dev/ruby/lib/ruby/gems/1.8/gems/rake-0.7.0/lib/rake.rb:844:in 
`send'        from 
d:/dev/ruby/lib/ruby/gems/1.8/gems/rake-0.7.0/lib/rake.rb:844:in `each' 
from ./test.rb:522:in `create' from ./test.rb:493:in `overview' from 
overview.rb:72
-- 
http://www.braveworld.net/riva

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