Hello Vadim;
I have been looking and experimenting with BFiler. So far, I have been able
to insert into BTree,
but I have not been able to write to disk. (the initially created file stays
at same size).
Best Regards,
-C.B
//
Configuration config = new Configuration(DOMParser.toDocument(
Xindice.DEFAULT_CONFIGURATION), false);
BTreeFiler btf = new BTreeFiler();
btf.setConfig(config);
File file = new File("c:\\");
btf.setLocation(file, "test");
btf.create();
// this works and does indeed inserts to the btree
for(int i=0; i<100000; i++)
{
btf.addValue(new Value("hello"+i), i);
}
// this throws an exception saying page file not open.
btf.writeRecord(new Key("key"), new Value("val"));
btf.close();
On 7/5/07, Vadim Gritsenko <[EMAIL PROTECTED]> wrote:
Cam Bazz wrote:
> Hello Developers,
>
> I have been looking for a solid implementation of a Java BTree on disk
> for the longest time. Could it be possible to use xindices btree on disk
> seperately.
> If so, where would be a good place to start. I have looked at the source
> code, instantiated a new BTree and added values to it, but I got a null
> pointer exception saying that the file was not opened.
I don't think you can use BTree class directly. Take a look at BTreeFiler
- that
should be better fit. Once you instantiate it, you need to pass in
configuration
and open it. Once you are done working with it, it needs to be closed.
See also org.apache.xindice.core.Collection, there you can see how to work
with
Filers.
PS Have you seen JISP?
Vadim
[1] http://www.coyotegulch.com/products/jisp/
