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Subject: RE: [jira] Commented: (OPENJPA-305) Dynamic configuration of
 EntityManagerFactory
Date: Tue, 18 Sep 2007 19:08:54 -0700
Message-ID: <3992B07C0590B548BB294D31768A1DA2774318@repbex01.amer.bea.com>
In-Reply-To: <31705630.1190167363662.JavaMail.jira@brutus>
Thread-Topic: [jira] Commented: (OPENJPA-305) Dynamic configuration of
 EntityManagerFactory
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 <31705630.1190167363662.JavaMail.jira@brutus>
From: "Pinaki Poddar" <ppoddar@bea.com>
To: <dev@openjpa.apache.org>


>I don't understand why we do the isDynamic() check in equals() 
>and hashCode(), though; shouldn't getOriginalValue() always be correct?

Correct. Thanks.

Pinaki Poddar
972.834.2865
 

>-----Original Message-----
>From: Patrick Linskey (JIRA) [mailto:jira@apache.org] 
>Sent: Tuesday, September 18, 2007 9:03 PM
>To: dev@openjpa.apache.org
>Subject: [jira] Commented: (OPENJPA-305) Dynamic configuration 
>of EntityManagerFactory
>
>
>    [ 
>https://issues.apache.org/jira/browse/OPENJPA-305?page=com.atla
>ssian.jira.plugin.system.issuetabpanels:comment-tabpanel#action
>_12528633 ] 
>
>Patrick Linskey commented on OPENJPA-305:
>-----------------------------------------
>
>Generally, it looks good. Some comments:
>
>I don't understand why we do the isDynamic() check in equals() 
>and hashCode(), though; shouldn't getOriginalValue() always be correct?
>
>Also, it looks like there's a synchronization issue at hand -- 
>based on my reading, dynamic sets must occur in a synchronized 
>manner, or the behavior is non-deterministic. That is OK (I 
>don't think that we necessarily want to add synchronization on 
>accesses), but should be well-documented.
>
>> Dynamic configuration of EntityManagerFactory
>> ---------------------------------------------
>>
>>                 Key: OPENJPA-305
>>                 URL: 
>https://issues.apache.org/jira/browse/OPENJPA-305
>>             Project: OpenJPA
>>          Issue Type: New Feature
>>            Reporter: Pinaki Poddar
>>         Attachments: openjpa-305.patch.1.txt
>>
>>
>> OpenJPA configures EntityManagerFactory at creation time via 
>an instance of Configuartion object. Once EntityManagerFactory 
>is created and a EntityManager is issued from it -- the 
>Configuration is frozen by design. That is no further changes 
>to Configuration is allowed as long as EntityManagerFactory lives.
>> For certain configuration properties, it is desirable to 
>change them during the lifetime of a EntityManagerFactory.
>> This issue is raised to initiate a discussion on such a 
>feature, the possibility and limitations of dynamic update and 
>track the impact of such a change as frozen Configuration is 
>an important assumption.
>>  
>
>--
>This message is automatically generated by JIRA.
>-
>You can reply to this email to add a comment to the issue online.
>
>

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