Answer by John Donn for JAVA: an EntityManager object in a multithread...
I am off by three years or so :), but as far as injecting EntityManager in EJBs is concerned, here is a link to Adam Bien's blog entry...
View ArticleAnswer by Makky for JAVA: an EntityManager object in a multithread environment
Here is full working thread-safe Entity Manager Helper.import javax.persistence.EntityManager;import javax.persistence.EntityManagerFactory;import javax.persistence.Persistence;public class...
View ArticleAnswer by n0rmzzz for JAVA: an EntityManager object in a multithread environment
You normally have transactions around what you do with database objects. What each given thread sees about the changes made by other threads is controlled by 'transaction isolation' settings.Start...
View ArticleAnswer by prunge for JAVA: an EntityManager object in a multithread environment
Entity managers are not thread-safe (source Java EE 6 tutorial) and cannot be shared among threads. Each thread needs to use its own entity manager or bad things will happen, regardless of clear() or...
View ArticleAnswer by gerrytan for JAVA: an EntityManager object in a multithread...
There are two types of managing EntityManager: container managed and application managed. For application managed, the preferred method of obtaining EntityManager is through EntityManagerFactory. Java...
View ArticleJAVA: an EntityManager object in a multithread environment
if I have multiple threads, each use injector to get the EntityManager object, each use the em object to select a list of other class objects. Ready to be used in a for loop.If a thread finishes first...
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