On Wed, Oct 21, 2009 at 7:03 AM, deepak_scs <deepak_at_swamicyber.com> wrote:
>
> I am using JAXB and I have a large set of data which i have to marshal into a
> xml.Since marshalling the whole thing into xml in a single step will be
> using most of the memory , i want to split it into parts and write to the
> xml file incremently
>
> For example if my generated output xml should be like this:
> <Employees>
> <employee>......</employee>
> <employee>.....</employee>
> <employee>.....</employee>
> <employee>.....</employee>
> ..
> ...
> ..
> </Employees>
>
> I would like to write the <employee> sections separately into a file instead
> of writing the whole thing together.I am retrieving the employee details
> from the database and converting to xml.There are almost 8 lakh records.So
> marshalling the whole thing in single step will use up my memory.How can i
> do it?????
Use Stax API (XMLStreamWriter) as the underlying XML processing thing;
write <Employees> tag using that, and then pass XMLStreamWriter to
JAXB Marshaller, marshall employee by employee.
This is the pattern I use; similarly works well with unmarshalling.
Not sure if this is in FAQ or not, but it probably should be.
Hope this helps,
-+ Tatu +-