Re: [Springframework-developer] OpenSessionInViewFilter

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Juergen:
   FWIW: I am using the OpenSessionInViewFilter with Webwork2.

   Anyways, when the filter is applied, flushing never happens even when =
=20
using the transactionproxy factory.  If I remove the filter from the =20
web.xml, everything works perfectly.

   Any guesses?

Cheers,
   matthew

On Dec 9, 2003, at 7:03 AM, j=FCrgen h=F6ller [werk3AT] wrote:

> Matthew,
>
> TransactionProxyFactoryBean can just be used to proxy Spring-managed =20=

> Java objects: in the web case, at best a whole Controller. The view =20=

> rendering is initiated by DispatcherServlet, delegating to =20
> View.render. There is no single entry point in form of a =20
> Spring-managed bean to catch the whole request processing. But there =20=

> is the HandlerInterceptor facility to intercept that processing at =20
> various points.
>
> It's important to stress that OpenSessionInViewInterceptor for =20
> Spring's web MVC respectively OpenSessionInViewFilter for any web =20
> processing still lets Spring-managed business methods perform their =20=

> transactions as usual. The interceptor/filter just pre-binds a =20
> Hibernate Session that all transactions will use to the current =20
> thread, and which will stay open until view rendering has been =20
> completed.
>
> Your TransactionProxyFactoryBean setup should work, with or without =20=

> OpenSessionInViewFilter. Note that you need to access the "OSUserDao" =20=

> bean to get transactional behavior, not the "OSUserDaoTarget" =20
> directly. And you need to get the method pattern in the =20
> transactionAttributes right - in the simplest case, specify:
>
>          <property name=3D"transactionAttributes">
>              <props>
>                  <prop key=3D"*">PROPAGATION_REQUIRED</prop>
>              </props>
>          </property>
>
> That should open transactions for all methods, not just ones whose =20
> names start with "find" etc. And don't specify "readOnly" for =20
> transactions that should persist changes: "readOnly" will switch the =20=

> underlying Hibernate Sessions to FLUSH_NEVER. A good way is to start =20=

> with the general pattern above and go more fine-granular when you've =20=

> managed to make the general case work.
>
> Juergen
>
>
> -----Original Message-----
> From: Matthew E. Porter [mailto:ma...@me...]
> Sent: Tuesday, December 09, 2003 1:51 PM
> To: j=FCrgen h=F6ller [werk3AT]
> Subject: Re: [Springframework-developer] OpenSessionInViewFilter
>
>
> Juergen:
>    Here is what I currently have that is not working.
>
>      <bean id=3D"OSUserDaoTarget"
> =
class=3D"com.metissian.security.principal.provider.osuser.configuration.O=20=

> S
> UserManagerDAO">
>          <property name=3D"sessionFactory">
>              <ref local=3D"MetalSessionFactory"/>
>          </property>
>      </bean>
>
>      <bean id=3D"OSUserDao"
> =
class=3D"org.springframework.transaction.interceptor.TransactionProxyFact=20=

> o
> ryBean">
>          <property name=3D"transactionManager">
>              <ref local=3D"MetalTransactionManager"/>
>          </property>
>          <property name=3D"target">
>              <ref local=3D"OSUserDaoTarget"/>
>          </property>
>          <property name=3D"transactionAttributes">
>              <props>
>                  <prop =
key=3D"find*">PROPAGATION_REQUIRED,readOnly</prop>
>                  <prop key=3D"delete*">PROPAGATION_REQUIRED</prop>
>                  <prop key=3D"update*">PROPAGATION_REQUIRED</prop>
>                  <prop key=3D"save*">PROPAGATION_REQUIRED</prop>
>              </props>
>          </property>
>      </bean>
>
>
>    For some reason, I believed that wrapping an object in a
> TransactionProxyFactoryBean provided the transactionality you talked
> about.  Am I wrong?
>
>
> Cheers,
>    matthew
>
> On Dec 9, 2003, at 12:45 AM, j=FCrgen h=F6ller [werk3AT] wrote:
>
>> Matthew,
>>
>> You should either use Spring-managed transactions (via
>> HibernateTransactionManager or JtaTransactionManager), which will
>> automatically flush a Session at transaction commit, or set
>> HibernateTemplate's/HibernateInterceptor's "flushMode" property to
>> FLUSH_EAGER (respectively "flushModeName" to "FLUSH_EAGER" in a
>> textual bean definition). This will guarantee to flush as early as
>> possible, not after view rendering: After all, a view should not
>> modify the model, so there should be no need to flush afterwards.
>>
>> Juergen
>>
>>
>> ________________________________
>>
>> Von: spr...@li... im Auftrag
>> von Matthew E. Porter
>> Gesendet: Di 09.12.2003 02:20
>> An: spr...@li...
>> Betreff: [Springframework-developer] OpenSessionInViewFilter
>>
>>
>>
>> I am attempting to use the OpenSessionInViewFilter.  According to the
>> javadoc, the session is not flush at the end of the filter.  =20
>> Therefore,
>> without overriding the closeSession() method in the filter, how do I
>> get the session to flush?  I am currently accessing DAOs wrapped as a
>> ProxyFactoryBean with a HibernateInterceptor.
>>
>> Please help!
>>
>>
>> Cheers,
>>    matthew
>>
>>
>>
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