XOM API for Processing XML with Java

[Tatu Saloranta <cowtowncoder AT yahoo.com>]

--- On Sat, 6/20/09, Elliotte Harold <elharo AT ibiblio.org> wrote:

> Anvesh Vagiri<yahanvesh AT gmail.com>
> wrote:
> > hi,
> >
> > I am just a newbie to XOM, and i need to append nodes to an existing
> > xml file always at the end I used the code available here.
> >
> > http://marc.info/?l=xom-interest&m=117286293113470&w=2
> >
> > But unfortunately it gives Out of memory error in my java netbeans
> > when the file size increases more than just 10-15MB.
> >
> 
> 1. Try running the code outside NetBeans.
> 2. Use a profiler to see where the memory is going, and if
> you have memory leak somewhere.

It is also possible that it's just because of default heap size (64M), and 
typical expanse ratio of a tree model (3x - 5x) means that all memory is 
getting used. If so, increasing heap size would overcome problem for this 
case.

But if significantly bigger documents are to be handled, the usual solution 
is to either process document sub-tree at a time (if it's record-based and 
this is possible), or use a lower-level abstraction like streaming parser & 
generator. This would be done by reading through existing document up until 
addition point, copying content through, and then starting to add content 
after this.
My personal favorite is StaxMate (http://staxmate.codehaus.org/Tutorial), but 
I am bit biased.

-+ Tatu +-