bean scope

Here the scope is used for setting the scope of spring bean. Before spring 2.0 there are 2 kinds of the scope:singleton and prototype. After spring 2.0 session, request and global session has been added. Also you can comtomize your own scope.

It is the default scope and only one shared bean will be in the spring IoC container.

here is an example:

<bean id="role" class="com.kincolle.Role" scope="singleton"/> 

or

<bean id="role" class="com.kincolle.Role" singleton="true"/>

When a kind of bean has been setted as prototype, every request will create a new bean. Which means after the beans have been created, the container will not be reponsible for it life.

here is an example:

<bean id="role" class="com.kincolle.Role" scope="prototype"/>

or

<beanid="role" class="com.kincolle.Role" singleton="false"/>

When a kind of bean has been setted as request, every http request will create a new bean and it is usefull just in the current HTTP request. When you use request, session or global session, you should have a web.xml like the following(version of servlet is over 2.4):

<web-app>
   ...
  <listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
  </listener>
   ...
</web-app>

Then we can set the scope:

<bean id="role" class="com.kincolle.Role" scope="request"/>

When a kind of bean has been setted as session, every http request will create a new bean and it is usefull just in the current HTTP session. Here is how to set it:

<bean id="role" class="com.kincolle.Role" scope="session"/>

It is near to session but it is based on web app of portlet．Here is how to set it:

<bean id="role" class="com.kincolle.Role" scope="global session"/>