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Re: [eclipselink-users] Custom Partitioning Policy
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Please include the stack trace.
Michael Pflueger wrote:
>
> Hello,
> i have trouble implementing a custom partitioning policy.
>
> For testing purposes I'm trying to use a hashpartitioning but "attaching"
> it to the model class via @Partitioning. I created MyHashPartitioning
> which inherits from HashPartitioning and just sets its partitionField and
> unionUnpartitionableQueries fields with a default constructor like this:
>
> public class MyHashPartitioningPolicy extends HashPartitioningPolicy {
> public MyHashPartitioningPolicy() {
> super("id", true);
> }
> }
>
> When I now attach it to the model via
> @Partitioning(name = "part", partitioningClass =
> MyHashPartitioningPolicy.class)
> @Partitioned("part")
>
> It does not work and I get NPE warnings plus it doesn't find any data of
> the partitioned class.
> Warnings:
> [EL Warning]: 2011-11-08
> 17:16:05.921--ClientSession(18012736)--java.lang.NullPointerException
> [EL Warning]: 2011-11-08
> 17:16:05.921--UnitOfWork(11982507)--java.lang.NullPointerException
> [EL Warning]: 2011-11-08
> 17:16:05.921--ClientSession(21048949)--java.lang.NullPointerException
> [EL Warning]: 2011-11-08
> 17:16:05.921--ClientSession(5312057)--java.lang.NullPointerException
> [EL Warning]: 2011-11-08
> 17:16:05.921--UnitOfWork(24966838)--java.lang.NullPointerException
> [EL Warning]: 2011-11-08
> 17:16:05.921--UnitOfWork(19488744)--java.lang.NullPointerException
>
> When I use the normal way with
>
> @HashPartitioning(name = "plantPart", unionUnpartitionableQueries=true,
> partitionColumn = @Column(name="id"))
>
> It does work, however, and it finds the elements and I don't get any
> warnings.
>
> Regards,
> Michael
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