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From hantsy <han...@yahoo.com.cn>
Subject Re: [jira] [Commented] (DELTASPIKE-315) Provide a producer for EntityManagerFactories
Date Fri, 22 Feb 2013 01:31:01 GMT
I hope there are some properties to mange the FlashMode, LockMode,
Transaction isolate level etc.

Hantsy

On 2/22/2013 07:18, Jason Porter (JIRA) wrote:
>     [ https://issues.apache.org/jira/browse/DELTASPIKE-315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13583656#comment-13583656
] 
>
> Jason Porter commented on DELTASPIKE-315:
> -----------------------------------------
>
> Do we need a way to pass other properties into the EMF? I like what you have here Mark,
seems nice and easy.
>                 
>> Provide a producer for EntityManagerFactories
>> ---------------------------------------------
>>
>>                 Key: DELTASPIKE-315
>>                 URL: https://issues.apache.org/jira/browse/DELTASPIKE-315
>>             Project: DeltaSpike
>>          Issue Type: Bug
>>          Components: JPA-Module
>>    Affects Versions: 0.3-incubating
>>            Reporter: Mark Struberg
>>            Assignee: Mark Struberg
>>             Fix For: 0.4-incubating
>>
>>
>> I found myself using the following pattern quite often in projects in the last time.
I have a @Qualifier UnitName(value) and a producer for a @Dependent EntityManagerFactory for
it. The configuration is mostly provided via the persistenceProperties Map in EntityManagerFactory#createEntityManagerFactory(unitname,
persistenceProperties);
>> We can further tweak the config lookup path and define a route which makes the most
sense.
>> This can be used to create the EntityManager producer very easily.
>> @ApplicationScoped
>> public class MyEntityManagerProducer {
>>   private @Inject @UnitName("orderUnit") EntityManagerFactory emf;
>>   
>>   @Produces @RequestScoped
>>   public EntityManager createEm() {
>>     return emf.createEntityManager();
>>   }
>>   .. + disposer 
>> }
>> Please note that the EMF producer doens't clash with anything else as it only produces
EMFs with the Qualifier @UnitName!
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