openjpa - JPA: load a related entity from another persistence context? -


i have entity called route, has related entity called employee:

public class route {     @manytoone     private employee driver;      // more fields... }  public class employee {      // more fields... }

these 2 entities stored in different databases. so, live in 2 different persistence contexts. because of that, when load route entity, "driver" field null.

is possible load route , automatically fetch "driver" field somehow?

no, it's not possible. how jpa execute such basic query?

select r route r r.driver.name = :name

you'll have store id of driver in route entity, load explicitely, , hope it's there (because don't have foreign key constraint).


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