Re: [Springframework-developer] Protype Scope of Spring Bean - creates problematic singleton instance

[Lachezar D. <l.d...@gm...>]

  Web Controllers are singletons by design, they get instantiated only
once, with the option to instantiate a controller upon first request,
and handle all matching requests.

  Probably the 'easiest' way to achieve what you need is to declare a
scoped proxy for your controller, that should be Request Scoped.

  <beans
    ...
    xmlns:aop="http://www.springframework.org/schema/aop"
  >
    <bean id="..." class="..." scope="request">
      <aop:scoped-proxy proxy-target-class="true" />
       ...
    </bean>
  </beans>

  Did you check the ThrowAwayController class? I have not used it,
however it seems it provides some one-time-use-only work flow.

  It is not my <job> to criticize your design, but Controllers should
be stateless services. Putting state in the controller is probably a
good way to get a bad headache.

  And if your Controller IS stateless I don;t see a reason why it
can't be singleton scoped.


2008/6/9, Jaga <v.j...@gm...>:
>
>
>  Actual code snippet where the bean is being referred.
>
>
>
>  <?xml version="1.0" encoding="UTF-8"?>
>  <beans xmlns="http://www.springframework.org/schema/beans"
>   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>   xsi:schemaLocation="http://www.springframework.org/schema/beans
>  http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
>
>
> <bean id="assetExposureReportController"
>  class="com.sp.cms.cdointerface.portlet.controller.AssetExposureReportController"
>  scope="prototype">
>                 <property name="sessionForm" value="true"/>
>  <property name="commandName"><value>formBean</value></property>
>  <property
>  name="commandClass"><value>com.sp.cms.cdointerface.portlet.form.AssetExposureReportFormBean</value></property>
>  </bean>
>
>  On accessing this bean in multiple browsers, recently accessed instance's
>  value is retrieved across the browsers.
>
>  --
>  Jag
>
>
>
>
>  Jaga wrote:
>  >
>  > hi,
>  >
>  > When I tried with the prototype scope in spring, on opening two browsers
>  > there
>  >  is only one instance is created.
>  >
>  > Hence the value of the recently accessed instance by the user is
>  > retrieved.
>  >
>  > version used: spring-beans-2.0.xsd
>  >
>  > Snippet:
>  >
>  > <?xml version="1.0" encoding="UTF-8"?>
>  > <beans xmlns="http://www.springframework.org/schema/beans"
>  >        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>  >        xsi:schemaLocation="http://www.springframework.org/schema/beans
>  > http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
>  >
>  > <bean id="obj1" class="com.dto.Class1" scope="prototype">
>  > </bean>
>  >
>  > Please help.
>  >
>  >
>
>  --
>
> View this message in context: http://www.nabble.com/Protype-Scope-of-Spring-Bean---creates-problematic-singleton-instance-tp17727103p17729307.html
>
> Sent from the springframework-developer mailing list archive at Nabble.com.
>
>
>  -------------------------------------------------------------------------
>  Check out the new SourceForge.net Marketplace.
>  It's the best place to buy or sell services for
>  just about anything Open Source.
>  http://sourceforge.net/services/buy/index.php
>  _______________________________________________
>  Springframework-developer mailing list
>  Spr...@li...
>  https://lists.sourceforge.net/lists/listinfo/springframework-developer
>