To build:

Even if you are not using an entity manager, building this requires a

JPA implementation (since the mock entity manager still uses JPA

interfaces). Download an implementation (e.g., the reference implementation

from GlassFish) and in your environment set

JAVAX_PERSISTENCE=path_to/javax.persistence.jar

Then run

ant

To run:

In general, to use a MockEntityManager, run

java <jvmargs> -DMockEntityManager=MockEntityManager \

-jar jars/StockBatchingForkJoin.jar \

[size_of_fork/join_pool]

The fork/join pool size is optional and defaults to the number of CPUs

on the machine. Remember that the operation will also use the calling

thread, so the effective number of tasks running simultaneously is one

more than the pool size.